c64/64MAP11.TXT

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The Project 64 etext of several Commodore 64 memory maps. Converted
to etext by anonymous.  The original etexts were transferred from
ftp://arnold.hiof.no/programs and concatenated into one document.

Commodore_64_IO_Maps.doc
Commodore_64_Memory_Maps.txt
Commodore_64_RAM_Memory_Map.doc
Commodore_64_ROM_Memory_Map.doc
Commodore_64_ROM_Memory_Map.txt

64MAP11.TXT etext #41. This replaces 64MAP10.TXT from June 1996.

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The Project 64 etext of Commodore_64_IO_Maps.doc

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;	Commodore 64 I/O Map
;	V1.1	1 Jun 1994


	COMMODORE 64 INPUT/OUTPUT ASSIGNMENTS


HEX	DECIMAL		BITS	DESCRIPTION

0000	0		7-0	MOS 6510 Data Direction
					Register (xx101111)
					Bit= 1: Output, Bit=0:
					Input, x=Don't Care

0001	1			MOS 6510 Micro-Processor
					On-Chip I/O Port
			0	/LORAM Signal (0=Switch	BASIC ROM Out)
			1	/HIRAM Signal (0=Switch Kernal ROM Out)
			2	/CHAREN Signal (0=Swith Char. ROM In)
			3	Cassette Data Output Line
			4	Cassette Switch Sense: 1 = Switch Closed
			5	Cassette Motor Control
				O = ON, 1 = OFF
			6-7	Undefined


D000-D02E	53248-54271	MOS 6566 VIDEO INTERFACE CONTROLLER (VIC)

D000		53248		Sprite 0 X Pos
D001		53249		Sprite 0 Y Pos
D002		53250		Sprite 1 X Pos
D003		53251		Sprite 1 Y Pos
D004		53252		Sprite 2 X Pos
D005		53253		Sprite 2 Y Pos
D006		53254		Sprite 3 X Pos
D007		53255		Sprite 3 Y Pos
D008		53256		Sprite 4 X Pos
D009		53257		Sprite 4 Y Pos
D00A		53258		Sprite 5 X Pos
D00B		53259		Sprite 5 Y Pos
D00C		53260		Sprite 6 X Pos
D00D		53261		Sprite 6 Y Pos
D00E		53262		Sprite 7 X Pos
D00F		53263		Sprite 7 Y Pos
D010		53264		Sprites 0-7 X Pos (msb of X coord.)

D011		53265		VIC Control Register
			7	Raster Compare: (Bit 8)	See 53266
			6	Extended Color Text Mode 1 = Enable
			5	Bit Map Mode. 1 = Enable
			4	Blank Screen to Border Color: 0 = Blank
			3	Select 24/25 Row Text Display: 1 = 25 Rows
			2-0	Smooth Scroll to Y Dot-Position (0-7)

D012	53266			Read Raster / Write Raster Value for Compare
				IRQ
D013	53267			Light-Pen Latch X Pos
D014	53268			Light-Pen Latch Y Pos
D015	53269			Sprite display Enable: 1 = Enable

D016	53270			VIC Control Register
			7-6	Unused
			5	ALWAYS SET THIS BIT TO 0 !
			4	Multi-Color Mode: 1 = Enable (Text or
				Bit-Map)
			3	Select 38/40 Column Text Display: 1 = 40 Cols
			2-0	Smooth Scroll to X Pos

D017	53271			Sprites 0-7 Expand 2x Vertical (Y)

D018	53272			VIC Memory Control Register
			7-4	Video Matrix Base Address (inside VIC)
			3-1	Character Dot-Data Base	Address (inside VIC)
			0	Select upper/lower Character Set

D019	53273			VIC Interrupt Flag Register (Bit = 1: IRQ
				Occurred)
			7	Set on Any Enabled VIC IRQ Condition
			3	Light-Pen Triggered IRQ Flag
			2	Sprite to Sprite Collision IRQ Flag
			1	Sprite to Background Collision IRQ Flag
			0	Raster Compare IRQ Flag

D01A	53274			IRQ Mask Register: 1 = Interrupt Enabled
D01B	53275			Sprite to Background Display Priority:
				1 = Sprite
D01C	53276			Sprites 0-7 Multi-Color Mode Select:
				1 = M.C.M.
D01D	53277			Sprites 0-7 Expand 2x Horizontal (X)

D01E	53278			Sprite to Sprite Collision Detect
D01F	53279			Sprite to Background Collision Detect
D020	53280			Border Color
D021	53281			Background Color 0
D022	53282			Background Color 1
D023	53283			Background Color 2
D024	53284			Background Color 3
D025	53285			Sprite Multi-Color Register 0
D026	53286			Sprite Multi-Color Register 1

D027	53287			Sprite 0 Color
D028	53288			Sprite 1 Color
D029	53289			Sprite 2 Color
D02A	53290			Sprite 3 Color
D02B	53291			Sprite 4 Color
D02C	53292			Sprite 5 Color
D02D	53293			Sprite 6 Color
D02E	53294			Sprite 7 Color

D400-D7FF	54272-55295	MOS 6581 SOUND INTERFACE DEVICE (SID)

D400	54272			Voice 1: Frequency Control - Low-Byte
D401	54273			Voice 1: Frequency Control - High-Byte
D402	54274			Voice 1: Pulse Waveform	Width - Low-Byte
D403	54275		7-4	Unused
			3-0	Voice 1: Pulse Waveform Width - High-Nybble
D404	54276			Voice 1: Control Register
			7	Select Random Noise Waveform, 1 = On
			6	Select Pulse Waveform, 1 = On
			5	Select Sawtooth Waveform, 1 = On
			4	Select Triangle Waveform, 1 = On
			3	Test Bit: 1 = Disable Oscillator 1
			2	Ring Modulate Osc. 1 with Osc. 3 Output,
				1 = On
			1	Synchronize Osc. 1 with Osc. 3 Frequency,
				1 = On
			0	Gate Bit: 1 = Start Att/Dec/Sus,
				0 = Start Release

D405	54277			Envelope Generator 1: Attack / Decay Cycle
				Control
                        7-4     Select Attack Cycle Duration: 0-15
			3-0	Select Decay Cycle Duration: 0-15

D406	54278			Envelope Generator 1: Sustain / Release Cycle
				Control
                        7-4     Select Sustain Cycle Duration: 0-15
                        3-0     Select Release Cycle Duration: 0-15

D407	54279			Voice 2: Frequency Control - Low-Byte
D408	54280			Voice 2: Frequency Control - High-Byte
D409	54281			Voice 2: Pulse Waveform Width - Low-Byte

D40A	54282		7-4	Unused
			3-0	Voice 2: Pulse Waveform Width - High-Nybble

D40B	54283			Voice 2: Control Register
			7	Select Random Noise Waveform, 1 = On
			6	Select Pulse Waveform, 1 = On
			5	Select Sawtooth Waveform, 1 = On
			4	Select Triangle Waveform, 1 = On
			3	Test Bit: 1 = Disable Oscillator 1
			2	Ring Modulate Osc. 2 with Osc. 1 Output,
				1 = On
			1	Synchronize Osc. 2 with Osc. 1 Frequency,
				1 = On
			0	Gate Bit: 1 = Start Att/Dec/Sus,
				0 = Start Release

D40C	54284			Envelope Generator 2: Attack / Decay Cycle
				Control
			7-4	Select Attack Cycle Duration: O-15
			3-0	Select Decay Cycle Duration: 0-15

D40D	54285			Envelope Generator 2: Sustain / Release Cycle
				Control
			7-4	Select Sustain Cycle Duration: O-15
			3-0	Select Release Cycle Duration: O-15

D40E	54286			Voice 3: Frequency Control - Low-Byte
D40F	54287			Voice 3: Frequency Control - High-Byte
D410	54288			Voice 3: Pulse Waveform Width - Low-Byte
D411	54289		7-4	Unused
			3-0	Voice 3: Pulse Waveform Width - High-Nybble
D412	54290			Voice 3: Control Register
			7	Select Random Noise Waveform, 1 = On
			6	Select Pulse Waveform, 1 = On
			5	Select Sawtooth Waveform, 1 = On
			4	Select Triangle Waveform, 1 = On
			3	Test Bit: 1 = Disable Oscillator 1
			2	Ring Modulate Osc. 3 with Osc. 2 Output,
				1 = On
			1	Synchronize Osc. 3 with Osc. 2 Frequency,
				1 = On
			0	Gate Bit: 1 = Start Att/Dec/Sus,
				0 = Start Release

D413	54291		Envelope Generator 3: Attac/Decay Cycle Control
			7-4	Select Attack Cycle Duration: 0-15
			3-0	Select Decay Cycle Duration: 0-15

D414	54285			Envelope Generator 3: Sustain / Release Cycle
				Control
			7-4	Select Sustain Cycle Duration: 0-15
			3-0	Select Release Cycle Duration: 0-15


D415	54293			Filter Cutoff Frequency: Low-Nybble
				(Bits 2-0)
D416	54294			Filter Cutoff Frequency: High-Byte
D417	54295			Filter Resonance Control / Voice Input
				Control
			7-4	Select Filter Resonance: 0-15
			3	Filter External Input: 1 = Yes, 0 = No
			2	Filter Voice 3 Output: 1 = Yes, 0 = No
			1	Filter Voice 2 Output: 1 = Yes, 0 = No
			0	Filter Voice 1 Output: 1 = Yes, 0 = No

D418	54296			Select Filter Mode and Volume
			7	Cut-Off Voice 3 Output: 1 = Off, 0 = On

			6	Select Filter High-Pass Mode: 1 = On
			5	Select Filter Band-Pass Mode: 1 = On
			4	Select Filter Low-Pass Mode: 1 = On
			3-0	Select Output Volume: 0-15

D419	54297			Analog/Digital Converter: Game Paddle 1
				(0-255)
D41A	54298			Analog/Digital Converter Game Paddle 2
				(0-255)
D41B	54299			Oscillator 3 Random Number Generator
D41C	54230			Envelope Generator 3 Output

D500-D7FF	54528-55295	SID IMAGES
D800-DBFF	55296-56319	Color RAM (Nybbles)

DC00-DCFF	56320-56575	MOS 6526 Complex Interface Adapter (CIA) #1

DC00	56320			Data Port A (Keyboard, Joystick, Paddles,
				Light-Pen)

			7-0	Write Keyboard Column Values for Keyboard
				Scan
			7-6	Read Paddles on Port A / B (01 = Port A,
				10 = Port B)
			4	Joystick A Fire Button: 1 = Fire
			3-2	Paddle Fire Buttons
			3-0	Joystick A Direction (0-15)

DC01	56321			Data Port B (Keyboard, Joystick, Paddles):
				Game Port 1
			7-0	Read Keyboard Row Values for Keyboard Scan

			7	Timer B Toggle/Pulse Output
			6	Timer A: Toggle/Pulse Output

			4	Joystick 1 Fire Button: 1 = Fire
			3-2	Paddle Fire Buttons
			3-0	Joystick 1 Direction

DC02	56322			Data Direction Register - Port A (56320)
DC03	56323			Data Direction Register - Port B (56321)
DC04	56324			Timer A: Low-Byte
DC05	56325			Timer A: High-Byte
DC06	56326			Timer B: Low-Byte
DC07	56327			Timer B: High-Byte

DC08	56328			Time-of-Day Clock: 1/10 Seconds
DC09	56329			Time-of-Day Clock: Seconds
DC0A	56330			Time-of-Day Clock: Minutes
DC0B	56331			Time-of-Day Clock: Hours + AM/PM Flag (Bit 7)

DC0C	56332			Synchronous Serial I/O Data Buffer
DC0D	56333			CIA Interrupt Control Register (Read
				IRQs/Write Mask)

			7	IRQ Flag (1 = IRQ Occurred) / Set-Clear Flag
			4	FLAG1 IRQ (Cassette Read / Serial Bus SRQ
				Input)
			3	Serial Port Interrupt
			2	Time-of-Day Clock Alarm Interrupt
			1	Timer B Interrupt
			0	Timer A Interrupt

DC0E	56334			CIA Control Register A
			7	Time-of-Day Clock Frequency: 1 = 50 Hz,
				0 = 60 Hz
			6	Serial Port I/O Mode Output, 0 = Input
			5	Timer A Counts: 1 = CNT Signals,
				0 = System 02 Clock

			4	Force Load Timer A: 1 = Yes
			3	Timer A Run Mode: 1 = One-Shot,
				0 = Continuous
			2	Timer A Output Mode to PB6: 1 = Toggle,
				0 = Pulse
			1	Timer A Output on PB6: 1 = Yes, 0 = No
			0	Start/Stop Timer A: 1 = Start, 0 = Stop

DC0F	56335			CIA Control Register B
			7	Set Alarm/TOD-Clock: 1 = Alarm, 0 = Clock
			6-5	Timer B Mode Select:
					00 = Count System 02 Clock Pulses
					01 = Count Positive CNT Transitions
					10 = Count Timer A Underflow Pulses
					11 = Count Timer A Underflows While
					     CNT Positive
			4-0	Same as CIA Control Reg. A - for Timer B

DD00-DDFF	56576-56831		MOS 6526 Complex Interface Adapter
					(CIA) #2

DD00	56576			Data Port A (Serial Bus, RS-232, VIC Memory
				Control)
			7	Serial Bus Data Input
			6	Serial Bus Clock Pulse Input
			5	Serial Bus Data Output
			4	Serial Bus Clock Pulse Output
			3	Serial Bus ATN Signal Output
			2	RS-232 Data Output (User Port)
			1-0	VIC Chip System Memory Bank Select
				(Default = 11)

DD01	56577		Data Port B (User Port, RS-232)
			7	User / RS-232 Data Set Ready
			6	User / RS-232 Clear to Send
			5	User
			4	User / RS-232 Carrier Detect
			3	User / RS-232 Ring Indicator
			2	User / RS-232 Data Terminal Ready
			1	User / RS-232 Request to Send
			0	User / RS-232 Received Data

DD02	56578			Data Direction Register - Port A
DD03	56579			Data Direction Register - Port B
DD04	56580			Timer A: Low-Byte
DD05	56581			Timer A: High-Byte
DD06	56582			Timer B: Low-Byte
DD07	56583			Timer B: High-Byte

DD08	56584			Time-of-Day Clock: 1/10 Seconds
DD09	56585			Time-of-Day Clock: Seconds
DD0A	56586			Time-of-Day Clock: Minutes
DD0B	56587			Time-of-Day Clock: Hours + AM/PM Flag (Bit 7)
DD0C	56588			Synchronous Serial I/O Data Buffer
DD0D	56589			CIA Interrupt Control Register (Read
				NMls/Write Mask)
			7	NMI Flag (1 = NMI Occurred) / Set-Clear Flag
			4	FLAG1 NMI (User/RS-232 Received Data Input)
			3	Serial Port Interrupt

			1	Timer B Interrupt
			0	Timer A Interrupt

DD0E	56590			CIA Control Register A

			7	Time-of-Day Clock Frequency: 1 = 50 Hz,
				0 = 60 Hz
			6	Serial Port I/O Mode Output, 0 = Input
			5	Timer A Counts: 1 = CNT Signals,
				0 = System 02 Clock
			4	Force Load Timer A: 1 = Yes
			3	Timer A Run Mode: 1 = One-Shot,
				0 = Continuous
			2	Timer A Output Mode to PB6: 1 = Toggle,
				0 = Pulse
			1	Timer A Output on PB6: 1 = Yes, 0 = No
			0	Start/Stop Timer A: 1 = Start, 0 = Stop

DD0F	56591			CIA Control Register B
			7	Set Alarm/TOD-Clock: 1 = Alarm, 0 = Clock
			6-5	Timer B Mode Select:
					00 = Count System 02 Clock Pulses
					01 = Count Positive CNT Transitions
					10 = Count Timer A Underflow Pulses
					11 = Count Timer A Underflows While
					     CNT Positive
			4-0	Same as CIA Control Reg. A - for Timer B


DE00-DEFF	56832-57087	Reserved for Future I/O Expansion
DF00-DFFF	57088-57343	Reserved for Future I/O Expansion


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End of the Project 64 etext of Commodore_64_IO_Maps.doc

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The Project 64 etext of Commodore_64_Memory_Maps.txt

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COMMODORE 64  MEMORY MAPS

          ADDRESS
LABEL     HEX         DEC     DESCRIPTION
----------------------------------------------------------------------------
D6510     0000        0       6510 On-chip Data Direction Register.
R6510     0001        1       6510 On-chip 8-bit Input/Output Register.
TEMP      0002        2       Unused. Free for user programs.
ADRAY1    0003-0004   3       Jump Vector: Convert FAC to Integer in (A/Y)
                              ($B1AA).
ADRAY2    0005-0006   5       Jump Vector: Convert Integer in (A/Y) to
                              Floating point in (FAC); ($B391).
CHARAC    0007        7       Search Character/Temporary Integer during INT.
ENDCHR    0008        8       Flag: Scan for Quote at end of String.
INTEGR    0007-0008   7       Temporary Integer during OR/AND.
TRMPOS    0009        9       Screen Column for last TAB.
VERCK     000A        10      Flag: 0 = Load, 1 = Verify.
COUNT     000B        11      Input Buffer Pointer/Number of Subscripts.
DIMFLG    000C        12      Flag: Default Array dimension.
VALTYP    000D        13      Data type Flag: $00 = Numeric, $FF = String.
INTFLG    000E        14      Data type Flag: $00 = Floating point, $80 =
                              Integer.
GARBFL    000F        15      Flag: DATA scan/List Quote/Garbage collection.
SUBFLG    0010        16      Flag: Subscript reference/User Function call.
INPFLG    0011        17      Input Flag: $00 = INPUT, $40 = GET, $98 =
                              READ.
TANSGN    0012        18      Flag: TAN sign/Comparative result.
CHANNL    0013        19      File number of current Input Device.
LINNUM    0014-0015   20      Temporary: Integer value.
TEMPPT    0016        22      Pointer: Temporary String Stack.
LASTPT    0017-0018   23      Last temporary String Address.
TEMPST    0019-0021   25      Stack for temporary Strings.
INDEX     0022-0025   34      Utility Pointer Area.
INDEX1    0022-0023   34      First Utility Pointer.
INDEX2    0024-0025   36      Second Utility Pointer.
RESHO     0026-002A   38      Floating point product of Multiply and
                              Divide.
TXTTAB    002B-002C   43      Pointer: Start of BASIC Text Area ($0801).
VARTAB    002D-002E   45      Pointer: Start of BASIC Variables.
ARYTAB    002F-0030   47      Pointer: Start of BASIC Arrays.
STREND    0031-0032   49      Pointer: End of BASIC Arrays + 1.
FRETOP    0033-0034   51      Pointer: Bottom of String space.
FRESPC    0035-0036   53      Utility String Pointer.
MEMSIZ    0037-0038   55      Pointer: Highest Address available to BASIC
                              ($A000).
CURLIN    0039-003A   57      Current BASIC Line number.
OLDLIN    003B-003C   59      Previous BASIC Line number.
OLDTXT    003D-003E   61      Pointer: BASIC Statement for CONT.
DATLIN    003F-0040   63      Current DATA Line number.
DATPTR    0041-0042   65      Pointer: Used by READ - current DATA Item
                              Address.
INPPTR    0043-0044   67      Pointer: Temporary storage of Pointer during
                              INPUT Routine.
VARNAM    0045-0046   69      Name of Variable being sought in Variable
                              Table.
VARPNT    0047-0048   71      Pointer: to value of (VARNAM) if Integer, to
                              descriptor if String.
FORPNT    0049-004A   73      Pointer: Index Variable for FOR/NEXT loop.
VARTXT    004B-004C   75      Temporary storage for TXTPTR during READ,
                              INPUT and GET.
OPMASK    004D        77      Mask used during FRMEVL.
TEMPF3    004E-0052   78      Temporary storage for FLPT value.
FOUR6     0053        83      Length of String Variable during garbage
                              collection.
JMPER     0054-0056   84      Jump Vector used in Function Evaluation -
                              JMP followed by Address ($4C,$LB,$MB).
TEMPF1    0057-005B   87      Temporary storage for FLPT value.
TEMPF2    005C-0060   92      Temporary storage for FLPT value.
FAC       0061-0066   97      Main Floating point Accumulator.
FACEXP    0061        97      FAC Exponent.
FACHO     0062-0065   98      FAC Mantissa.
FACSGN    0066        102     FAC Sign.
SGNFLG    0067        103     Pointer: Series Evaluation Constant.
BITS      0068        104     Bit Overflow Area during normalisation
                              Routine.
AFAC      0069-006E   105     Auxiliary Floating point Accumulator.
ARGEXP    0069        105     AFAC Exponent.
ARGHO     006A-006D   106     AFAC Mantissa.
ARGSGN    006E        110     AFAC Sign.
ARISGN    006F        111     Sign of result of Arithmetic Evaluation.
FACOV     0070        112     FAC low-order rounding.
FBUFPT    0071-0072   113     Pointer: Used during CRUNCH/ASCII conversion.
CHRGET    0073-008A   115     Subroutine: Get next Byte of BASIC Text.
            ,0073  INC $7A       ,0082  BEQ $0073
            ,0075  BNE $0079     ,0084  SEC
            ,0077  INC $7B       ,0085  SBC #$30
          ! ,0079  LDA $0801     ,0087  SEC
            ,007C  CMP #$3A      ,0088  SBC #$D0
            ,007E  BCS $008A     ,008A  RTS
            ,0080  CMP #$20
CHRGOT    0079        121     Entry to Get same Byte again.
TXTPTR    007A-007B   122     Pointer: Current Byte of BASIC Text.
RNDX      008B-008F   139     Floating RND Function Seed Value.
STATUS    0090        144     Kernal I/O Status Word  ST.
STKEY     0091        145     Flag: $7F = STOP key.
SVXT      0092        146     Timing Constant for Tape.
VERCKK    0093        147     Flag: 0 = Load, 1 = Verify.
C3PO      0094        148     Flag: Serial Bus - Output Character buffered.
BSOUR     0095        149     Buffered Character for Serial Bus.
SYNO      0096        150     Cassette Sync. number.
TEMPX     0097        151     Temporary storage of X Register during CHRIN.
TEMPY     0097        151     Temporary storage of Y Register during RS232
                              fetch.
LDTND     0098        152     Number of Open Files/Index to File Table.
DFLTN     0099        153     Default Input Device (0).
DFLTO     009A        154     Default Output Device (3).
PRTY      009B        155     Parity of Byte Output to Tape.
DPSW      009C        156     Flag: Byte received from Tape.
MSGFLG    009D        157     Flag: $00 = Program mode: Suppress Error
                              Messages, $40 = Kernal Error Messages only,
                              $80 = Direct mode: Full Error Messages.
FNMIDX    009E        158     Index to Cassette File name/Header ID for
                              Tape write.
PTR1      009E        158     Tape Error log pass 1.
PTR2      009F        159     Tape Error log pass 2.
TIME      00A0-00A2   160     Real-time jiffy Clock (Updated by IRQ
                              Interrupt approx. every 1/60 of Second);
                              Update Routine: UDTIMK ($F69B).
TSFCNT    00A3        163     Bit Counter Tape Read or Write/Serial Bus
                              EOI (End Of Input) Flag.
TBTCNT    00A4        164     Pulse Counter Tape Read or Write/Serial Bus
                              shift Counter.
CNTDN     00A5        165     Tape Synchronising count down.
BUFPNT    00A6        166     Pointer: Tape I/O buffer.
INBIT     00A7        167     RS232 temporary for received Bit/Tape
                              temporary.
BITC1     00A8        168     RS232 Input Bit count/Tape temporary.
RINONE    00A9        169     RS232 Flag: Start Bit check/Tape temporary.
RIDATA    00AA        170     RS232 Input Byte Buffer/Tape temporary.
RIPRTY    00AB        171     RS232 Input parity/Tape temporary.
SAL       00AC-00AD   172     Pointer: Tape Buffer/Screen scrolling.
EAL       00AE-00AF   174     Tape End Address/End of Program.
CMPO      00B0-00B1   176     Tape timing Constants.
TAPE1     00B2-00B3   178     Pointer: Start Address of Tape Buffer ($033C).
BITTS     00B4        180     RS232 Write bit count/Tape Read timing Flag.
NXTBIT    00B5        181     RS232 Next Bit to send/Tape Read - End of
                              Tape.
RODATA    00B6        182     RS232 Output Byte Buffer/Tape Read Error Flag.
FNLEN     00B7        183     Number of Characters in Filename.
LA        00B8        184     Current File - Logical File number.
SA        00B9        185     Current File - Secondary Address.
FA        00BA        186     Current File - First Address (Device number).
                                OPEN LA,FA,SA;  OPEN 1,8,15,"I0":CLOSE 1
FNADR     00BB-00BC   187     Pointer: Current File name Address.
ROPRTY    00BD        189     RS232 Output Parity/Tape Byte to be Input or
                              Output.
FSBLK     00BE        190     Tape Input/Output Block count.
MYCH      00BF        191     Serial Word Buffer.
CAS1      00C0        192     Tape Motor Switch.
STAL      00C1-00C2   193     Start Address for LOAD and Cassette Write.
MEMUSS    00C3-00C4   195     Pointer: Type 3 Tape LOAD and general use.
LSTX      00C5        197     Matrix value of last Key pressed; No Key = $40.
NDX       00C6        198     Number of Characters in Keyboard Buffer
                              queue.
RVS       00C7        199     Flag: Reverse On/Off; On = $01, Off = $00.
INDX      00C8        200     Pointer: End of Line for Input (Used to
                              suppress trailing spaces).
LXSP      00C9-00CA   201     Cursor X/Y (Line/Column) position at start of
                              Input.
SFDX      00CB        203     Flag: Print shifted Characters.
BLNSW     00CC        204     Flag: Cursor blink; $00 = Enabled, $01 =
                              Disabled.
BLNCT     00CD        205     Timer: Count down for Cursor blink toggle.
GDBLN     00CE        206     Character under Cursor while Cursor Inverted.
BLNON     00CF        207     Flag: Cursor Status; $00 = Off, $01 = On.
CRSW      00D0        208     Flag: Input from Screen = $03, or Keyboard =
                              $00.
PNT       00D1-00D2   209     Pointer: Current Screen Line Address.
PNTR      00D3        211     Cursor Column on current Line, including
                              Wrap-round Line, if any.
QTSW      00D4        212     Flag: Editor in Quote Mode; $00 = Not.
LNMX      00D5        213     Current logical Line length: 39 or 79.
TBLX      00D6        214     Current Screen Line number of Cursor.
SCHAR     00D7        215     Screen value of current Input Character/Last
                              Character Output.
INSRT     00D8        216     Count of number of inserts outstanding.
LDTB1     00D9-00F2   217     Screen Line link Table/Editor temporaries.
                              High Byte of Line Screen Memory Location.
USER      00F3-00F4   243     Pointer: Current Colour RAM Location.
KEYTAB    00F5-00F6   245     Vector: Current Keyboard decoding Table.
                              ($EB81)
RIBUF     00F7-00F8   247     RS232 Input Buffer Pointer.
ROBUF     00F9-00FA   249     RS232 Output Buffer Pointer.
FREKZP    00FB-00FE   251     Free Zero Page space for User Programs.
BASZPT    00FF        255     BASIC temporary Data Area.
ASCWRK    00FF-010A   255     Assembly Area for Floating point to ASCII
                              conversion.
BAD       0100-013E   256     Tape Input Error log.
STACK     0100-01FF   256     6510 Hardware Stack Area.
BSTACK    013F-01FF   319     BASIC Stack Area.
BUF       0200-0258   512     BASIC Input Buffer (Input Line from Screen).
LAT       0259-0262   601     Kernal Table: Active logical File numbers.
FAT       0263-026C   611     Kernal Table: Active File First Addresses
                              (Device numbers).
SAT       026D-0276   621     Kernal Table: Active File Secondary
                              Addresses.
KEYD      0277-0280   631     Keyboard Buffer Queue (FIFO).
MEMSTR    0281-0282   641     Pointer: Bottom of Memory for Operating
                              System ($0800).
MEMSIZ    0283-0284   643     Pointer: Top of Memory for Operating
                              System ($A000).
TIMOUT    0285        645     Serial IEEE Bus timeout defeat Flag.
COLOR     0286        646     Current Character Colour code.
GDCOL     0287        647     Background Colour under Cursor.
HIBASE    0288        648     High Byte of Screen Memory Address ($04).
XMAX      0289        649     Maximum number of Bytes in Keyboard
                              Buffer ($0A).
RPTFLG    028A        650     Flag: Repeat keys; $00 = Cursors, INST/DEL &
                              Space repeat, $40 no Keys repeat, $80 all
                              Keys repeat ($00).
KOUNT     028B        651     Repeat Key: Speed Counter ($04).
DELAY     028C        652     Repeat Key: First repeat delay Counter ($10).
SHFLAG    028D        653     Flag: Shift Keys: Bit 1 = Shift, Bit 2 = CBM,
                              Bit 3 = CTRL; ($00 = None, $01 = Shift, etc.).
LSTSHF    028E        654     Last Shift Key used for debouncing.
KEYLOG    028F-0290   655     Vector: Routine to determine Keyboard table
                              to use based on Shift Key Pattern ($EB48).
MODE      0291        657     Flag: Upper/Lower Case change: $00 = Disabled,
                              $80 = Enabled ($00).
AUTODN    0292        658     Flag: Auto scroll down: $00 = Disabled ($00).
M51CTR    0293        659     RS232 Pseudo 6551 control Register Image.
M51CDR    0294        660     RS232 Pseudo 6551 command Register Image.
M51AJB    0295-0296   661     RS232 Non-standard Bits/Second.
RSSTAT    0297        663     RS232 Pseudo 6551 Status Register Image.
BITNUM    0298        664     RS232 Number of Bits left to send.
BAUDOF    0299-029A   665     RS232 Baud Rate; Full Bit time microseconds.
RIDBE     029B        667     RS232 Index to End of Input Buffer.
RIDBS     029C        668     RS232 Pointer: High Byte of Address of Input
                              Buffer.
RODBS     029D        669     RS232 Pointer: High Byte of Address of Output
                              Buffer.
RODBE     029E        670     RS232 Index to End of Output Buffer.
IRQTMP    029F-02A0   671     Temporary store for IRQ Vector during Tape
                              operations.
ENABL     02A1        673     RS232 Enables.
TODSNS    02A2        674     TOD sense during Tape I/O.
TRDTMP    02A3        675     Temporary storage during Tape READ.
TD1IRQ    02A4        676     Temporary D1IRQ Indicator during Tape READ.
TLNIDX    02A5        677     Temporary for Line Index.
TVSFLG    02A6        678     Flag: TV Standard: $00 = NTSC, $01 = PAL.
TEMP      02A7-02FF   679     Unused.
SPR11     02C0-02FE   704     Sprite #11 Data Area.
                                (SCREEN + $03F8 + SPR number)
                                POKE 1024+1016+0,11  to use Sprite#0 DATA
                                from ($02C0-$02FE).
IERROR    0300-0301   768     Vector: Indirect entry to BASIC Error
                              Message, (X) points to Message ($E38B).
IMAIN     0302-0303   770     Vector: Indirect entry to BASIC Input Line
                              and Decode ($A483).
ICRNCH    0304-0305   772     Vector: Indirect entry to BASIC Tokenise
                              Routine ($A57C).
IQPLOP    0306-0307   774     Vector: Indirect entry to BASIC LIST
                              Routine ($A71A).
IGONE     0308-0309   776     Vector: Indirect entry to BASIC Character
                              dispatch Routine ($A7E4).
IEVAL     030A-030B   778     Vector: Indirect entry to BASIC Token
                              evaluation ($AE86).
SAREG     030C        780     Storage for 6510 Accumulator during SYS.
SXREG     030D        781     Storage for 6510 X-Register during SYS.
SYREG     030E        782     Storage for 6510 Y-Register during SYS.
SPREG     030F        783     Storage for 6510 Status Register during SYS.
USRPOK    0310        784     USR Function JMP Instruction ($4C).
USRADD    0311-0312   785     USR Address ($LB,$MB).
TEMP      0313        787     Unused.
CINV      0314-0315   788     Vector: Hardware IRQ Interrupt Address ($EA31).
CNBINV    0316-0317   790     Vector: BRK Instruction Interrupt Address
                              ($FE66).
NMINV     0318-0319   792     Vector: Hardware NMI Interrupt Address ($FE47).
IOPEN     031A-031B   794     Vector: Indirect entry to Kernal OPEN
                              Routine ($F34A).
ICLOSE    031C-031D   796     Vector: Indirect entry to Kernal CLOSE
                              Routine ($F291).
ICHKIN    031E-031F   798     Vector: Indirect entry to Kernal CHKIN
                              Routine ($F20E).
ICKOUT    0320-0321   800     Vector: Indirect entry to Kernal CHKOUT
                              Routine ($F250).
ICLRCH    0322-0323   802     Vector: Indirect entry to Kernal CLRCHN
                              Routine ($F333).
IBASIN    0324-0325   804     Vector: Indirect entry to Kernal CHRIN
                              Routine ($F157).
IBSOUT    0326-0327   806     Vector: Indirect entry to Kernal CHROUT
                              Routine ($F1CA).
ISTOP     0328-0329   808     Vector: Indirect entry to Kernal STOP
                              Routine ($F6ED).
IGETIN    032A-032B   810     Vector: Indirect entry to Kernal GETIN
                              Routine ($F13E).
ICLALL    032C-032D   812     Vector: Indirect entry to Kernal CLALL
                              Routine ($F32F).
USRCMD    032E-032F   814     User Defined Vector ($FE66).
ILOAD     0330-0331   816     Vector: Indirect entry to Kernal LOAD
                              Routine ($F4A5).
ISAVE     0332-0333   818     Vector: Indirect entry to Kernal SAVE
                              Routine ($F5ED).
TEMP      0334-033B   820     Unused.
TBUFFR    033C-03FB   828     Tape I/O Buffer.
SPR13     0340-037E   832     Sprite #13.
SPR14     0380-03BE   896     Sprite #14.
SPR15     03C0-03FE   960     Sprite #15.
TEMP      03FC-03FF   1020    Unused.
VICSCN    0400-07E7   1024    Default Screen Video Matrix.
TEMP      07E8-07F7   2024    Unused.
SPNTRS    07F8-07FF   2040    Default Sprite Data Pointers.


          0800-9FFF   2048    Normal BASIC Program space.
          8000-9FFF   32768   Optional Cartridge ROM space.
          A000-BFFF   40960   BASIC ROM (Part) or 8 KB RAM.
          C000-CFFF   49152   4 KB RAM.
          D000-DFFF   53248   Input/Output Devices and Colour RAM or
                              4 KB RAM or Character ROM.
          D000-D02E   53248   6566 Video Interface Chip, VIC II.
          D400-D41C   54272   6581 Sound Interface Device, SID.
          D500-D7FF   54528   SID Images.
          D800-DBE7   55296   Colour RAM (Nybbles = 4 Bit RAM, LSB).
          DBE8-DBFF   56296   Unused Nybbles.
          DC00-DC0F   56320   6526 Complex Interface Adaptor, CIA.
          DD00-DD0F   56576   6526 Complex Interface Adaptor, CIA.
          E000-FFFF   57344   BASIC (Part)/Kernal ROM or 8 KB RAM.
          E000-E4FF   57344   BASIC ROM (Part) or RAM.
          E500-FFFF   58624   Kernal ROM or RAM.



	COMMODORE 64 INPUT/OUTPUT ASSIGNMENTS


HEX	DECIMAL		BITS	DESCRIPTION

0000	0		7-0	MOS 6510 Data Direction
					Register (xx101111)
					Bit= 1: Output, Bit=0:
					Input, x=Don't Care

0001	1			MOS 6510 Micro-Processor
					On-Chip I/O Port
			0	/LORAM Signal (0=Switch	BASIC ROM Out)
			1	/HIRAM Signal (0=Switch Kernal ROM Out)
			2	/CHAREN Signal (O=Switch Char. ROM In)
			3	Cassette Data Output Line
			4	Cassette Switch Sense: 1 = Switch Closed
			5	Cassette Motor Control
				O = ON, 1 = OFF
			6-7	Undefined


D000-D02E	53248-54271	MOS 6566 VIDEO INTERFACE CONTROLLER (VIC)

D000		53248		Sprite 0 X Pos
D001		53249		Sprite 0 Y Pos
D002		53250		Sprite 1 X Pos
D003		53251		Sprite 1 Y Pos
D004		53252		Sprite 2 X Pos
D005		53253		Sprite 2 Y Pos
D006		53254		Sprite 3 X Pos
D007		53255		Sprite 3 Y Pos
D008		53256		Sprite 4 X Pos
D009		53257		Sprite 4 Y Pos
D00A		53258		Sprite 5 X Pos
D00B		53259		Sprite 5 Y Pos
D00C		53260		Sprite 6 X Pos
D00D		53261		Sprite 6 Y Pos
D00E		53262		Sprite 7 X Pos
D00F		53263		Sprite 7 Y Pos
D010		53264		Sprites 0-7 X Pos (msb of X coord.)

D011		53265		VIC Control Register
			7	Raster Compare: (Bit 8)	See 53266
			6	Extended Color Text Mode 1 = Enable
			5	Bit Map Mode. 1 = Enable
			4	Blank Screen to Border Color: 0 = Blank
			3	Select 24/25 Row Text Display: 1 = 25 Rows
			2-0	Smooth Scroll to Y Dot-Position (0-7)

D012	53266			Read Raster / Write Raster Value for Compare
				IRQ
D013	53267			Light-Pen Latch X Pos
D014	53268			Light-Pen Latch Y Pos
D015	53269			Sprite display Enable: 1 = Enable

D016	53270			VIC Control Register
			7-6	Unused
			5	ALWAYS SET THIS BIT TO 0 !
			4	Multi-Color Mode: 1 = Enable (Text or
				Bit-Map)
			3	Select 38/40 Column Text Display: 1 = 40 Cols
			2-0	Smooth Scroll to X Pos

D017	53271			Sprites O-7 Expand 2x Vertical (Y)

D018	53272			VIC Memory Control Register
			7-4	Video Matrix Base Address (inside VIC)
			3-1	Character Dot-Data Base	Address (inside VIC)
			0	Select upper/lower Character Set

D019	53273			VIC Interrupt Flag Register (Bit = 1: IRQ
				Occurred)
			7	Set on Any Enabled VIC IRQ Condition
			3	Light-Pen Triggered IRQ Flag
			2	Sprite to Sprite Collision IRQ Flag
			1	Sprite to Background Collision IRQ Flag
			0	Raster Compare IRQ Flag

D01A	53274			IRQ Mask Register: 1 = Interrupt Enabled
D01B	53275			Sprite to Background Display Priority:
				1 = Sprite
D01C	53276			Sprites O-7 Multi-Color Mode Select:
				1 = M.C.M.
D01D	53277			Sprites 0-7 Expand 2x Horizontal (X)

D01E	53278			Sprite to Sprite Collision Detect
D01F	53279			Sprite to Background Collision Detect
D020	53280			Border Color
D021	53281			Background Color 0
D022	53282			Background Color 1
D023	53283			Background Color 2
D024	53284			Background Color 3
D025	53285			Sprite Multi-Color Register 0
D026	53286			Sprite Multi-Color Register 1

D027    53287                   Sprite 0 Color
D028	53288			Sprite 1 Color
D029	53289			Sprite 2 Color
D02A	53290			Sprite 3 Color
D02B	53291			Sprite 4 Color
D02C	53292			Sprite 5 Color
D02D	53293			Sprite 6 Color
D02E	53294			Sprite 7 Color

D400-D7FF	54272-55295	MOS 6581 SOUND INTERFACE DEVICE (SID)

D400	54272			Voice 1: Frequency Control - Low-Byte
D401	54273			Voice 1: Frequency Control - High-Byte
D402	54274			Voice 1: Pulse Waveform	Width - Low-Byte
D403	54275		7-4	Unused
			3-0	Voice 1: Pulse Waveform Width - High-Nybble
D404	54276			Voice 1: Control Register
			7	Select Random Noise Waveform, 1 = On
			6	Select Pulse Waveform, 1 = On
			5	Select Sawtooth Waveform, 1 = On
			4	Select Triangle Waveform, 1 = On
			3	Test Bit: 1 = Disable Oscillator 1
			2	Ring Modulate Osc. 1 with Osc. 3 Output,
				1 = On
			1	Synchronize Osc. 1 with Osc. 3 Frequency,
				1 = On
			0	Gate Bit: 1 = Start Att/Dec/Sus, 0 = Start
				Release

D405	54277			Envelope Generator 1: Attack / Decay Cycle
				Control
                        7-4     Select Attack Cycle Duration: 0-15
			3-0	Select Decay Cycle Duration: 0-15

D406	54278			Envelope Generator 1: Sustain / Release Cycle
				Control
			7-4	Select Sustain Cycle Duration: 0-15
			3-0	Select Release Cycle Duration: 0-15

D407	54279			Voice 2: Frequency Control - Low-Byte
D408	54280			Voice 2: Frequency Control - High-Byte
D409	54281			Voice 2: Pulse Waveform Width - Low-Byte

D40A	54282		7-4	Unused
			3-0	Voice 2: Pulse Waveform Width - High-Nybble

D40B	54283			Voice 2: Control Register
			7	Select Random Noise Waveform, 1 = On
			6	Select Pulse Waveform, 1 = On
			5	Select Sawtooth Waveform, 1 = On
			4	Select Triangle Waveform, 1 = On
			3	Test Bit: 1 = Disable Oscillator 1
			2	Ring Modulate Osc. 2 with Osc. 1 Output,
				1 = On
			1	Synchronize Osc. 2 with Osc. 1 Frequency,
				1 = On
			0	Gate Bit: 1 = Start Att/Dec/Sus, 0 = Start
				Release

D40C	54284			Envelope Generator 2: Attack / Decay Cycle
				Control
			7-4	Select Attack Cycle Duration: 0-15
			3-0	Select Decay Cycle Duration: 0-15

D40D	54285			Envelope Generator 2: Sustain / Release Cycle Control
			7-4	Select Sustain Cycle Duration: O-15
			3-0	Select Release Cycle Duration: O-15

D40E	54286			Voice 3: Frequency Control - Low-Byte
D40F	54287			Voice 3: Frequency Control - High-Byte
D410	54288			Voice 3: Pulse Waveform Width - Low-Byte
D411	54289		7-4	Unused
			3-0	Voice 3: Pulse Waveform Width - High-Nybble
D412	54290			Voice 3: Control Register
			7	Select Random Noise Waveform, 1 = On
			6	Select Pulse Waveform, 1 = On
			5	Select Sawtooth Waveform, 1 = On
			4	Select Triangle Waveform, 1 = On
			3	Test Bit: 1 = Disable Oscillator 1
			2	Ring Modulate Osc. 3 with Osc. 2 Output,
				1 = On
			1	Synchronize Osc. 3 with Osc. 2 Frequency,
				1 = On
			0	Gate Bit: 1 = Start Att/Dec/Sus, 0 = Start
				Release

D413	54291		Envelope Generator 3: Attack/Decay Cycle Control
			7-4	Select Attack Cycle Duration: 0-15
			3-0	Select Decay Cycle Duration: 0-15

D414	54285			Envelope Generator 3: Sustain / Release Cycle Control
			7-4	Select Sustain Cycle Duration: 0-15
			3-0	Select Release Cycle Duration: 0-15


D415	54293			Filter Cutoff Frequency: Low-Nybble
				(Bits 2-0)
D416	54294			Filter Cutoff Frequency: High-Byte
D417	54295			Filter Resonance Control / Voice Input
				Control
			7-4	Select Filter Resonance: 0-15
			3	Filter External Input: 1 = Yes, 0 = No
			2	Filter Voice 3 Output: 1 = Yes, 0 = No
				Filter Voice 2 Output: 1 = Yes, 0 = No
			0	Filter Voice 1 Output: 1 = Yes, 0 = No

D418	54296			Select Filter Mode and Volume
			7	Cut-Off Voice 3 Output: 1 = Off, O = On

			6	Select Filter High-Pass Mode: 1 = On
			5	Select Filter Band-Pass Mode: 1 = On
			4	Select Filter Low-Pass Mode: 1 = On
			3-0	Select Output Volume: 0-15

D419	54297			Analog/Digital Converter: Game Paddle 1
				(0-255)
D41A	54298			Analog/Digital Converter Game Paddle 2
				(0-255)
D41B	54299			Oscillator 3 Random Number Generator
D41C	54230			Envelope Generator 3 Output

D500-D7FF	54528-55295	SID IMAGES
D800-DBFF	55296-56319	Color RAM (Nybbles)

DC00-DCFF	56320-56575	MOS 6526 Complex Interface Adapter (CIA) #1

DC00	56320			Data Port A (Keyboard, Joystick, Paddles,
				Light-Pen)

			7-0	Write Keyboard Column Values for Keyboard
				Scan
			7-6	Read Paddles on Port A / B (01 = Port A,
				10 = Port B)
			4	Joystick A Fire Button: 1 = Fire
			3-2	Paddle Fire Buttons
			3-0	Joystick A Direction (0-15)

DC01	56321			Data Port B (Keyboard, Joystick, Paddles):
				Game Port 1
			7-0	Read Keyboard Row Values for Keyboard Scan

			7	Timer B Toggle/Pulse Output
			6	Timer A: Toggle/Pulse Output

			4	Joystick 1 Fire Button: 1 = Fire
			3-2	Paddle Fire Buttons
			3-0	Joystick 1 Direction

DC02	56322			Data Direction Register - Port A (56320)
DC03	56323			Data Direction Register - Port B (56321)
DC04	56324			Timer A: Low-Byte
DC05	56325			Timer A: High-Byte
DC06	56326			Timer B: Low-Byte
DC07	56327			Timer B: High-Byte

DC08	56328			Time-of-Day Clock: 1/10 Seconds
DC09	56329			Time-of-Day Clock: Seconds
DC0A	56330			Time-of-Day Clock: Minutes
DC0B	56331			Time-of-Day Clock: Hours + AM/PM Flag (Bit 7)

DC0C	56332			Synchronous Serial I/O Data Buffer
DC0D	56333			CIA Interrupt Control Register
				(Read IRQs/Write Mask)

			7	IRQ Flag (1 = IRQ Occurred) / Set-Clear Flag
			4	FLAG1 IRQ (Cassette Read / Serial Bus SRQ
				Input)
			3	Serial Port Interrupt
			2	Time-of-Day Clock Alarm Interrupt
			1	Timer B Interrupt
			0	Timer A Interrupt

DC0E	56334			CIA Control Register A
			7	Time-of-Day Clock Frequency: 1 = 50 Hz,
				0 = 60 Hz
			6	Serial Port I/O Mode Output, 0 = Input
			5	Timer A Counts: 1 = CNT Signals,
				0 = System 02 Clock

			4	Force Load Timer A: 1 = Yes
			3	Timer A Run Mode: 1 = One-Shot,
				0 = Continuous
			2	Timer A Output Mode to PB6: 1 = Toggle,
				0 = Pulse
			1	Timer A Output on PB6: 1 = Yes, 0 = No
			0	Start/Stop Timer A: 1 = Start, 0 = Stop

DC0F	56335			CIA Control Register B
			7	Set Alarm/TOD-Clock: 1 = Alarm, 0 = Clock
			6-5	Timer B Mode Select:
					00 = Count System 02 Clock Pulses
					01 = Count Positive CNT Transitions
					10 = Count Timer A Underflow Pulses
					11 = Count Timer A Underflows While
					     CNT Positive
			4-0	Same as CIA Control Reg. A - for Timer B

DD00-DDFF	56576-56831	MOS 6526 Complex Interface Adapter (CIA) #2

DD00	56576			Data Port A (Serial Bus, RS-232, VIC Memory
				Control)
			7	Serial Bus Data Input
			6	Serial Bus Clock Pulse Input
			5	Serial Bus Data Output
			4	Serial Bus Clock Pulse Output
			3	Serial Bus ATN Signal Output
			2	RS-232 Data Output (User Port)
			1-0	VIC Chip System Memory Bank Select
				(Default = 11)

DD01	56577		Data Port B (User Port, RS-232)
			7	User / RS-232 Data Set Ready
			6	User / RS-232 Clear to Send
			5	User
			4	User / RS-232 Carrier Detect
			3	User / RS-232 Ring Indicator
			2	User / RS-232 Data Terminal Ready
			1	User / RS-232 Request to Send
			0	User / RS-232 Received Data

DD02	56578			Data Direction Register - Port A
DD03	56579			Data Direction Register - Port B
DD04	56580			Timer A: Low-Byte
DD05	56581			Timer A: High-Byte
DD06	56582			Timer B: Low-Byte
DD07	56583			Timer B: High-Byte

DD08	56584			Time-of-Day Clock: 1/10 Seconds
DD09	56585			Time-of-Day Clock: Seconds
DD0A	56586			Time-of-Day Clock: Minutes
DD0B	56587			Time-of-Day Clock: Hours + AM/PM Flag (Bit 7)
DD0C	56588			Synchronous Serial I/O Data Buffer
DD0D	56589			CIA Interrupt Control Register (Read
				NMls/Write Mask)
			7	NMI Flag (1 = NMI Occurred) / Set-Clear Flag
			4	FLAG1 NMI (User/RS-232 Received Data Input)
			3	Serial Port Interrupt

			1	Timer B Interrupt
			0	Timer A Interrupt

DD0E	56590			CIA Control Register A

			7	Time-of-Day Clock Frequency: 1 = 50 Hz,
				0 = 60 Hz
			6	Serial Port I/O Mode Output, 0 = Input
			5	Timer A Counts: 1 = CNT Signals,
				0 = System 02 Clock
			4	Force Load Timer A: 1 = Yes
			3	Timer A Run Mode: 1 = One-Shot,
				0 = Continuous
			2	Timer A Output Mode to PB6: 1 = Toggle,
				0 = Pulse
			1	Timer A Output on PB6: 1 = Yes, 0 = No
			0	Start/Stop Timer A: 1 = Start, 0 = Stop

DD0F	56591			CIA Control Register B
			7	Set Alarm/TOD-Clock: 1 = Alarm, 0 = Clock
			6-5	Timer B Mode Select:
					00 = Count System 02 Clock Pulses
					01 = Count Positive CNT Transitions
					10 = Count Timer A Underflow Pulses
					11 = Count Timer A Underflows While
					     CNT Positive
			4-0	Same as CIA Control Reg. A - for Timer B


DE00-DEFF	56832-57087	Reserved for Future I/O Expansion
DF00-DFFF	57088-57343	Reserved for Future I/O Expansion


*********

End of the Project 64 etext of Commodore_64_Memory_Maps.txt

*********

The Project 64 etext of Commodore_64_RAM_Memory_Map.doc

*********

;	Commodore 64 RAM Memory Map
;	V1.2	1 sep 1994


LABEL	HEX		DECIMAL
	ADDRESS		LOCATION	DESCRIPTION

ADRAY2	0005-0006	5-6	Jump Vector: Convert Integer--Floating
CHARAC	0007		7	Search Character
ENDCHR	0008		8	Flag: Scan for Quote at End of String
TRMPOS	0009		9	Screen Column From Last TAB
VERCK	000A		10	Flag: 0 = Load, 1 = Verify
COUNT	000B		11	Input Buffer Pointer / No. of Subscripts
DIMFLG	000C		12	Flag: Default Array DiMension
VAUYP	000D		13	Data Type: $FF = String, $00 = Numeric
INTFLG	000E		14	Data Type: $80 = Integer, $00 = Floating
GARBFL	000F		15	Flag: DATA scan/LlST quote/Garbage Coll
SUBFLG	0010		16	Flag: Subscript Ref / User Function Call
INPFLG	0011		17	Flag: $00 = INPUT, $40 = GET, $98 = READ
TANSGN	0012		18	Flag TAN sign / Comparison Result
	0013		19	Flag: INPUT Prompt
LINNUM	0014-0015	20-21	Temp: Integer Value
TEMPPT	0016		22	Pointer Temporary String
LASTPT	0017-0018	23-24	Last Temp String Address
TEMPST	0019-0021	25-33	Stack for Temporary Strings
INDEX	0022-002S	34-37	Utility Pointer Area
RESHO	0026-002A	38-42	Floating-Point Product of Multiply
TXTTAB	002B-002C	43-44	Pointer: Start of BASIC	Text
VARTAB	002D-002E	45-46	Pointer: Start of BASIC	Variables
ARYTAB	002F-0030	47-48	Pointer: Start of BASIC Arrays
STREND	0031-0032	49-50	Pointer End of BASIC Arrays (+1)

FRETOP	0033-0034	51-52	Pointer: Bottom of String Storage
FRESPC	0035-0036	53-54	Utility String Pointer
MEMSIZ	0037-0038	55-56	Pointer: Highest Address Used by BASIC
CURLIN	0039-003A	57-58	Current BASIC Line Number
OLDLIN	003B-003C	59-60	Previous BASIC Line Number
OLDTXT	003D-003E	61-62	Pointer: BASIC Statement for CONT
DATLIN	003F-0040	63-64	Current DATA Line Number
DATPTR	0041-0042	65-66	Pointer: Current DATA Item Address
INPPTR	0043-0044	67-68	Vector: INPUT Routine
VARNAM	0045-0046	69-70	Current BASIC Variable Name
VARPNT	0047-0048	71-72	Pointer: Current BASIC Variable Data
FORPNT	0049-004A	73-74	Pointer: Index Variable for FOR/NEXT
	004B-0060	75-96	Temp Pointer / Data Area
FACEXP	0061		97	Floating-Point Accumulator #1: Exponent
FACHO	0062-0065	98-101	Floating Accum.	#1: Mantissa
FACSGN	0066		102	Floating Accum.	#1: Sign
SGNFLG	0067		103	Pointer: Series Evaluation Constant

BITS	0068		104	Floating -accum. #1: Overflow Digit
ARGEXP	0069		105	Floating-Point Accumulator #2: Exponent
ARGHO	006A-006D	106-109	Floating Accum. #2: Mantissa
ARGSGN	006E		110	Floating Accum. #2: Sign
ARISGN	006F		111	Sign Comparison Result: Accum. # 1 vs #2
FACOV	0070		112	Floating Accum. #1. Low-Order (Rounding)
FBUFPT	0071-0072	113-114	Pointer: Cassette Buffer

CHRGET	0073-008A	115-138	Subroutine: Get Next Byte of BASIC Text
CHRGOT	0079		121	Entry to Get Same Byte of Text Again
TXTPTR	007A-007B	122-123	Pointer: Current Byte of BASIC Text
RNDX	008B-008F	139-143	Floating RND Function Seed Value
STATUS	0090		144	Kernal l/O Status Word: ST
STKEY	0091		145	Flag: STOP key / RVS key
SVXT	0092		146	Timing Constant for Tape
VERCK	0093		147	Flag: 0 = Load, 1 = Verify
C3PO	0094		148	Flag: Serial Bus-Output Char. Buffered
BSOUR	0095		149	Buffered Character for Serial Bus
SYNO	0096		150	Cassette Sync No.
	0097		151	Temp Data Area
LDTND	0098		152	No. of Open Files / Index to File Table
DFLTN	0099		153	Default Input Device (0)
DFLTO	009A		154	Default Output (CMD) Device (3)

PRTY	009B		155	Tape Character Parity
PSW	009C		156	Flag: Tape Byte-Received
MSGFLG	009D		157	Flag: $80 = Direct Mode, $00 = Program
PTR1	009E		158	Tape Pass 1 Error Log
PTR2	009F		159	Tape Pass 2 Error Log
TIME	00A0-00A2	160-162	Real-Time Jiffy Clock (approx) 1/60 Sec
	00A3-00A4	163-164	Temp Data Area
CNTDN	00A5		165	Cassette Sync Countdown
BUFPNT	00A6		166	Pointer: Tape l/O Buffer
INBIT	00A7		167	RS-232 Input Bits / Cassette Temp
BITCI	00A8		168	RS-232 Input Bit Count / Cassette Temp
RINONE	00A9		169	RS-232 Flag: Check for Start Bit
RIDATA	00AA		170	RS-232 Input Byte Buffer/Cassette Temp
RIPRTY	00AB		171	RS-232 Input Parity / Cassette Short Cnt
SAL	00AC-00AD	172-173	Pointer: Tape Buffer/ Screen Scrolling
EAL	00AE-00AF	174-175	Tape End Addresses/End of Program
CMP0	00B0-00B1	176-177	Tape Timing Constants
TAPE1	00B2-00B3	178-179	Pointer: Start of Tape Buffer
BITTS	00B4		180	RS-232 Out Bit Count / Cassette Temp
NXTBIT	00B5		181	RS-232 Next Bit to Send/ Tape EOT Flag
RODATA	00B6		182	RS-232 Out Byte Buffer
FNLEN	00B7		183	Length of Current File Name
LA	00B8		184	Current Logical File Number

FA	00BA		186	Current Device Number
FNADR	00BB-00BC	187-188	Pointer: Current File Name
ROPRTY	00BD		189	RS-232 Out Parity / Cassette Temp
FSBLK	00BE		190	Cassette Read / Write Block Count
MYCH	00BF		191	Serial Word Buffer
CAS1	00C0		192	Tape Motor Interlock
STAL	00C1-00C2	193-194	I/O Start Address
MEMUSS	00C3-00C4	195-196	Tape Load Temps
LSTX	00C5		197	Current Key Pressed: CHR$(n) 0 = No Key
NDX	00C6		198	No. of Chars. in Keyboard Buffer (Queue)
RVS	00C7		199	Flag: Print Reverse Chars. -1=Yes, 0=No Used
INDX	00C8		200	Pointer: End of Logical	Line for INPUT
LXSP	00C9-00CA	201-202	Cursor X-Y Pos. at Start of INPUT
SFDX	00CB		203	Flag: Print Shifted Chars.
BLNSW	00CC		204	Cursor Blink enable: 0 = Flash Cursor
BLNCT	00CD		205	Timer: Countdown to Toggle Cursor
GDBLN	00CE		206	Character Under Cursor
BLNON	00CF		207	Flag: Last Cursor Blink	On/Off
CRSW	00D0		208	Flag: INPUT or GET from	Keyboard
PNT	00D1-00D2	209-210	Pointer: Current Screen	Line Address

PNTR	00D3		211	Cursor Column on Current Line
QTSW	00D4		212	Flag: Editor in Quote Mode, $00 = NO
LNMX	00D5		213	Physical Screen Line Length
TBLX	00D6		214	Current Cursor Physical Line Number
	00D7		215	Temp Data Area
INSRT	00D8		216	Flag: Insert Mode, >0 = # INSTs
LDTB1	00D9-00F2	217-242	Screen Line Link Table / Editor Temps
USER	00F3-00F4	243-244	Pointer: Current Screen	Color RAM loc.
KEYTAB	00F5-00F6	24S-246	Vector Keyboard Decode Table

RIBUF	00F7-00F8	247-248	RS-232 Input Buffer Pointer

ROBUF	00F9-00FA	249-250	RS-232 Output Buffer  Pointer
FREKZP	00FB-00FE	251-254	Free 0-Page Space for User Programs
BASZPT	00FF		255	BASIC Temp Data Area

	0100-01FF	256-511	Micro-Processor System Stack Area
	0100-010A	256-266	Floating to String Work Area
BAD	0100-013E	256-318	Tape Input Error Log
BUF	0200-02S8	512-600	System INPUT Buffer
LAT	0259-0262	601-610	KERNAL Table: Active Logical File No's.
FAT	0263-026C	611-620	KERNAL Table: Device No. for Each File
SAT	026D-0276	621-630	KERNAL Table: Second Address Each File
KEYD	0277-0280	631-640	Keyboard Buffer Queue (FIFO)

MEMSTR	0281-0282	641-642	Pointer: Bottom of Memory for O.S.
MEMSIZ	0283-0284	643-644	Pointer: Top of Memory for O.S.
TIMOUT	0285		645	Flag: Kernal Variable for IEEE Timeout
COLOR	0286		646	Current Character Color Code
GDCOL	0287		647	Background Color Under Cursor
HIBASE	0288		648	Top of Screen Memory (Page)
XMAX	0289		649	Size of Keyboard Buffer
RPTFLG	028A		650	Flag: REPEAT Key Used, $80 = Repeat
KOUNT	028B		651	Repeat Speed Counter
DELAY	028C		652	Repeat Delay Counter
SHFLAG	028D		653	Flag: Keyb'rd SHIFT Key/CTRL Key/C= Key
LSTSHF	028E		654	Last Keyboard Shift Pattern
KEYLOG	028F-0290	655-656	Vector: Keyboard Table Setup
MODE	0291		657	Flag: $00=Disable SHIFT	Keys, $80 = Enable
				 SHIFT Keys
AUTODN	0292		658	Flag: Auto Scroll Down, 0 = ON
M51CTR	0293		659	RS-232: 6551 Control Register Image
MS1CDR	0294		660	RS-232: 6551 Command Register Image
M51AJB	0295-0296	661-662	RS-232 Non-Standard BPS (Time/2-100) USA
RSSTAT	0297		663	RS-232: 6551 Status Register Image
BITNUM	0298		664	RS-232 Number of Bits Left to Send

BAUDOF	0299-029A	665-666	RS-232 Baud Rate: Full Bit Time (us)
RIDBE	029B		667	RS-232 Index to End of Input Buffer
RIDBS	029C		668	RS-232 Start of Input Buffer (Page)
RODBS	029D		669	RS-232 Start of Output Buffer (Page)
RODBE	029E		670	RS-232 Index to End of Output Buffer
IRQTMP	029F-02A0	671-672	Holds IRQ Vector During Tape I/O
ENABL	02A1		673	RS-232 Enables
	02A2		674	TOD Sense During Cassette I/O
	02A3		675	Temp Storage For Cassette Read
	02A4		676	Temp D1 IRQ Indicator For Cassette Read
	02A5		677	Temp For Line Index
	02A6		678	PAL/NTSC Flag, O= NTSC, 1 = PAL
	02A7-02FF	679-767	Unused
IERROR	0300-0301	768-769	Vector: Print BASIC Error Message
IMAIN	0302-0303	770-771	Vector: BASIC Warm Start
ICRNCH	0304-0305	772-773	Vector: Tokenize BASIC Text
IQPLOP	0306-0307	774-775	Vector: BASIC Text LIST
IGONE	0308-0309	776-777	Vector: BASIC Char. Dispatch
IEVAL	030A-030B	778-779	Vector: BASIC Token Evaluation
SAREG	030C		780	Storage for 6502 .A Register
SXREG	030D		781	Storage for 5502 .X Register

SYREG	030E		782	Storage for 6502 .Y Register
SPREG	030F		783	Storage for 6502 .SP Register
USRPOK	0310		784	USR Function Jump Instr (4C)
USRADD	0311-0312	785-786	USR Address Low	Byte / High Byte
	0313		787	Unused
CINV	0314-0315	788-789	Vector: Hardware Interrupt
CBINV	0316-0317	790-791	Vector: BRK Instr. Interrupt
NMINV	0318-0319	792-793	Vector: Non-Maskable Interrupt
IOPEN	031A-031B	794-795	KERNAL OPEN Routine Vector
ICLOSE	031C-031D	796-797	KERNAL CLOSE Routine Vector
ICHKIN	031E-031F	798-799	KERNAL CHKIN Routine
ICKOUT	0320-0321	800-801	KERNAL CHKOUT Routine
ICLRCH	0322-0323	802-803	KERNAL CLRCHN Routine Vector
IBASIN	0324-0325	804-805	KERNAL CHRIN Routine
IBSOUT	0326-0327	806-807	KERNAL CHROUT Routine
ISTOP	0328-0329	808-809	KERNAL STOP Routine Vector
IGETIN	032A-032B	810-811	KERNAL GETIN Routine
ICLALL	032C-032D	812-813	KERNAL CLALL Routine Vector
USRCMD	032E-032F	814-815	User-Defined Vector
ILOAD	0330 0331	813 817	KERNAL LOAD Routine

ISAVE	0332-0333	818-819		KERNAL SAVE Routine Vector
	0334-033B	820-827		Unused
TBUFFR	033C-03FB	828-1019	Tape l/O Buffer
	03FC-03FF	1020-1023	Unused
VICSCN	0400-07FF	1024-2047	1024 Byte Screen Memory Area
	0400-07E7	1024-2023	Video Matrix: 25 Lines X 40 Columns
	07F8-07FF	2040-2047	Sprite Data Pointers
	0800-9FFF	2048-40959	Normal BASIC Program Space
	8000-9FFF	32768-40959	VSP Cartridge ROM -- 8192 Bytes
 	A000-BFFF	40960-49151	BASIC ROM-8192 Bytes (or 8K RAM)
	C000-CFFF	49152-53247	RAM-4096 Bytes
	D000-DFFF	53248-57343	Input/Output Devices and
					Color RAM or Character Generator ROM
					or RAM-4096 Bytes
	E000-FFFF	57344-65535	KERNAL ROM -- 8192 Bytes (or 8K RAM)

*********

End of the Project 64 etext of Commodore_64_RAM_Memory_Map.doc

*********

The Project 64 etext of Commodore_64_ROM_Memory_Map.doc

*********

;	Commodore 64 ROM Memory Map
;	V1.2	1 Sep 1994

;
; Data types in headers (for reassembler):
;
;	DATA		Misc data
;	TEXT		String terminated with 00
;	WORD		Vectors in LO/HI byte pairs
;	CHIP		I/O Area
;	EMPTY		ROM containing FF's or AA's
;

;
; BASIC interpreter ROM ($A000 - $BFFF)
;

a000	40960	-	Restart Vectors				WORD
a00c	40972	stmdsp	BASIC Command Vectors			WORD
a052	41042	fundsp	BASIC Function Vectors			WORD
a080	41088	optab	BASIC Operator Vectors			WORD
a09e	41118	reslst	BASIC Command Keyword Table		DATA
a129	41257	msclst	BASIC Misc. Keyword Table		DATA
a140	41280	oplist	BASIC Operator Keyword Table		DATA
a14d	41293	funlst	BASIC Function Keyword Table		DATA
a19e	41374	errtab	Error Message Table			DATA
a328	41768	errptr	Error Message Pointers			WORD
a364	41828	okk	Misc. Messages				TEXT
a38a	41866	fndfor	Find FOR/GOSUB Entry on Stack
a3b8	41912	bltu	Open Space in Memory
a3fb	41979	getstk	Check Stack Depth
a408	41992	reason	Check Memory Overlap
a435	42037	omerr	Output ?OUT OF MEMORY Error
a437	42039	error	Error Routine
a469	42089	errfin	Break Entry
a474	42100	ready	Restart BASIC
a480	42112	main	Input & Identify BASIC Line
a49c	42140	main1	Get Line Number & Tokenise Text
a4a2	42146	inslin	Insert BASIC Text
a533	42291	linkprg	Rechain Lines
a560	42336	inlin	Input Line Into Buffer
a579	42361	crunch	Tokenise Input Buffer
a613	42515	fndlin	Search for Line Number
a642	42562	scrtch	Perform [new]
a65e	42590	clear	Perform [clr]
a68e	42638	stxpt	Reset TXTPTR
a69c	42652	list	Perform [list]
a717	42775	qplop	Handle LIST Character
a742	42818	for	Perform [for]
a7ae	42926	newstt	BASIC Warm Start
a7c4	42948	ckeol	Check End of Program
a7e1	42977	gone	Prepare to execute statement
a7ed	42989	gone3	Perform BASIC Keyword
a81d	43037	restor	Perform [restore]
a82c	43052	stop	Perform [stop], [end], break
a857	43095	cont	Perform [cont]
a871	43121	run	Perform [run]
a883	43139	gosub	Perform [gosub]
a8a0	43168	goto	Perform [goto]
a8d2	43218	return	Perform [return]
a8f8	43256	data	Perform [data]
a906	43270	datan	Search for Next Statement / Line
a928	43304	if	Perform [if]
a93b	43323	rem	Perform [rem]
a94b	43339	ongoto	Perform [on]
a96b	43371	linget	Fetch linnum From BASIC
a9a5	43429	let	Perform [let]
a9c4	43460	putint	Assign Integer
a9d6	43478	ptflpt	Assign Floating Point
a9d9	43481	putstr	Assign String
a9e3	43491	puttim	Assign TI$
aa2c	43564	getspt	Add Digit to FAC#1
aa80	43648	printn	Perform [print]#
aa86	43654	cmd	Perform [cmd]
aa9a	43674	strdon	Print String From Memory
aaa0	43680	print	Perform [print]
aab8	43704	varop	Output Variable
aad7	43735	crdo	Output CR/LF
aae8	43752	comprt	Handle comma, TAB(, SPC(
ab1e	43806	strout	Output String
ab3b	43835	outspc	Output Format Character
ab4d	43853	doagin	Handle Bad Data
ab7b	43899	get	Perform [get]
aba5	43941	inputn	Perform [input#]
abbf	43967	input	Perform [input]
abea	44010	bufful	Read Input Buffer
abf9	44025	qinlin	Do Input Prompt
ac06	44038	read	Perform [read]
ac35	44085	rdget	General Purpose Read Routine
acfc	44284	exint	Input Error Messages			TEXT
ad1e	44318	next	Perform [next]
ad61	44385	donext	Check Valid Loop
ad8a	44426	frmnum	Confirm Result
ad9e	44446	frmevl	Evaluate Expression in Text
ae83	44675	eval	Evaluate Single Term
aea8	44712	pival	Constant - pi				DATA
aead	44717	qdot	Continue Expression
aef1	44785	parchk	Expression in Brackets
aef7	44791	chkcls	Confirm Character
aef7	44791	-	-test ')'-
aefa	44794	-	-test '('-
aefd	44797	-	-test comma-
af08	44808	synerr	Output ?SYNTAX Error
af0d	44813	domin	Set up NOT Function
af14	44820	rsvvar	Identify Reserved Variable
af28	44840	isvar	Search for Variable
af48	44872	tisasc	Convert TI to ASCII String
afa7	44967	isfun	Identify Function Type
afb1	44977	strfun	Evaluate String Function
afd1	45009	numfun	Evaluate Numeric Function
afe6	45030	orop	Perform [or], [and]
b016	45078	dorel	Perform <, =, >
b01b	45083	numrel	Numeric Comparison
b02e	45102	strrel	String Comparison
b07e	45182	dim	Perform [dim]
b08b	45195	ptrget	Identify Variable
b0e7	45287	ordvar	Locate Ordinary Variable
b11d	45341	notfns	Create New Variable
b128	45352	notevl	Create Variable
b194	45460	aryget	Allocate Array Pointer Space
b1a5	45477	n32768	Constant 32768 in Flpt			DATA
b1aa	45482	facinx	FAC#1 to Integer in (AC/YR)
b1b2	45490	intidx	Evaluate Text for Integer
b1bf	45503	ayint	FAC#1 to Positive Integer
b1d1	45521	isary	Get Array Parameters
b218	45592	fndary	Find Array
b245	45637	bserr	?BAD SUBSCRIPT/?ILLEGAL QUANTITY
b261	45665	notfdd	Create Array
b30e	45838	inlpn2	Locate Element in Array
b34c	45900	umult	Number of Bytes in Subscript
b37d	45949	fre	Perform [fre]
b391	45969	givayf	Convert Integer in (AC/YR) to Flpt
b39e	45982	pos	Perform [pos]
b3a6	45990	errdir	Confirm Program Mode
b3e1	46049	getfnm	Check Syntax of FN
b3f4	46068	fndoer	Perform [fn]
b465	46181	strd	Perform [str$]
b487	46215	strlit	Set Up String
b4d5	46293	putnw1	Save String Descriptor
b4f4	46324	getspa	Allocate Space for String
b526	46374	garbag	Garbage Collection
b5bd	46525	dvars	Search for Next String
b606	46598	grbpas	Collect a String
b63d	46653	cat	Concatenate Two Strings
b67a	46714	movins	Store String in High RAM
b6a3	46755	frestr	Perform String Housekeeping
b6db	46811	frefac	Clean Descriptor Stack
b6ec	46828	chrd	Perform [chr$]
b700	46848	leftd	Perform [left$]
b72c	46892	rightd	Perform [right$]
b737	46903	midd	Perform [mid$]
b761	46945	pream	Pull sTring Parameters
b77c	46972	len	Perform [len]
b782	46978	len1	Exit String Mode
b78b	46987	asc	Perform [asc]
b79b	47003	gtbytc	Evaluate Text to 1 Byte in XR
b7ad	47021	val	Perform [val]
b7b5	47029	strval	Convert ASCII String to Flpt
b7eb	47083	getnum	Get parameters for POKE/WAIT
b7f7	47095	getadr	Convert FAC#1 to Integer in LINNUM
b80d	47117	peek	Perform [peek]
b824	47140	poke	Perform [poke]
b82d	47149	wait	Perform [wait]
b849	47177	faddh	Add 0.5 to FAC#1
b850	47184	fsub	Perform Subtraction
b862	47202	fadd5	Normalise Addition
b867	47207	fadd	Perform Addition
b947	47431	negfac	2's Complement FAC#1
b97e	47486	overr	Output ?OVERFLOW Error
b983	47491	mulshf	Multiply by Zero Byte
b9bc	47548	fone	Table of Flpt Constants			DATA
b9ea	47594	log	Perform [log]
ba28	47656	fmult	Perform Multiply
ba59	47705	mulply	Multiply by a Byte
ba8c	47756	conupk	Load FAC#2 From Memory
bab7	47799	muldiv	Test Both Accumulators
bad4	47828	mldvex	Overflow / Underflow
bae2	47842	mul10	Multiply FAC#1 by 10
baf9	47865	tenc	Constant 10 in Flpt			DATA
bafe	47870	div10	Divide FAC#1 by 10
bb07	47879	fdiv	Divide FAC#2 by Flpt at (AC/YR)
bb0f	47887	fdivt	Divide FAC#2 by FAC#1
bba2	48034	movfm	Load FAC#1 From Memory
bbc7	48071	mov2f	Store FAC#1 in Memory
bbfc	48124	movfa	Copy FAC#2 into FAC#1
bc0c	48140	movaf	Copy FAC#1 into FAC#2
bc1b	48155	round	Round FAC#1
bc2b	48171	sign	Check Sign of FAC#1
bc39	48185	sgn	Perform [sgn]
bc58	48216	abs	Perform [abs]
bc5b	48219	fcomp	Compare FAC#1 With Memory
bc9b	48283	qint	Convert FAC#1 to Integer
bccc	48332	int	Perform [int]
bcf3	48371	fin	Convert ASCII String to a Number in FAC#1
bdb3	48563	n0999	String Conversion Constants		DATA
bdc2	48578	inprt	Output 'IN' and Line Number
bddd	48605	fout	Convert FAC#1 to ASCII String
be68	48744	foutim	Convert TI to String
bf11	48913	fhalf	Table of Constants			DATA
bf71	49009	sqr	Perform [sqr]
bf7b	49019	fpwrt	Perform power ($)
bfb4	49076	negop	Negate FAC#1
bfbf	49087	logeb2	Table of Constants			DATA
bfed	49133	exp	Perform [exp]
;
;
;	C64 Kernal ROM
;
e000	57344	(exp continues)	EXP continued From BASIC ROM
e043	57411	polyx	Series Evaluation
e08d	57485	rmulc	Constants for RND			DATA
e097	57495	rnd	Perform [rnd]
e0f9	57593	bioerr	Handle I/O Error in BASIC
e10c	57612	bchout	Output Character
e112	57618	bchin	Input Character
e118	57624	bckout	Set Up For Output
e11e	57630	bckin	Set Up For Input
e124	57636	bgetin	Get One Character
e12a	57642	sys	Perform [sys]
e156	57686	savet	Perform [save]
e165	57701	verfyt	Perform [verify / load]
e1be	57790	opent	Perform [open]
e1c7	57799	closet	Perform [close]
e1d4	57812	slpara	Get Parameters For LOAD/SAVE
e200	57856	combyt	Get Next One Byte Parameter
e206	57862	deflt	Check Default Parameters
e20e	57870	cmmerr	Check For Comma
e219	57881	ocpara	Get Parameters For OPEN/CLOSE
e264	57956	cos	Perform [cos]
e26b	57963	sin	Perform [sin]
e2b4	58036	tan	Perform [tan]
e2e0	58080	pi2	Table of Trig Constants			DATA

;e2e0	1.570796327	pi/2
;e2e5	6.28318531	pi*2
;e2ea	0.25

;e2ef	#05	(counter)
;e2f0	-14.3813907
;e2f5	42.0077971
;e2fa	-76.7041703
;e2ff	81.6052237
;e304	-41.3417021
;e309	6.28318531

e30e	58126	atn	Perform [atn]
e33e	58174	atncon	Table of ATN Constants			DATA

;e33e	#0b	(counter)
;e3ef	-0.000684793912
;e344	 0.00485094216
;e349	-0.161117018
;e34e	 0.034209638
;e353	-0.0542791328
;e358	 0.0724571965
;e35d	-0.0898023954
;e362	 0.110932413
;e367	-0.142839808
;e36c	 0.19999912
;e371	-0.333333316
;e376	 1.00

e37b	58235	bassft	BASIC Warm Start [RUNSTOP-RESTORE]
e394	58260	init	BASIC Cold Start
e3a2	58274	initat	CHRGET For Zero-page
e3ba	58298	rndsed	RND Seed For zero-page			DATA
;e3b2	0.811635157
e3bf	58303	initcz	Initialize BASIC RAM
e422	58402	initms	Output Power-Up Message
e447	58439	bvtrs	Table of BASIC Vectors (for 0300)	WORD
e453	58451	initv	Initialize Vectors
e45f	58463	words	Power-Up Message			DATA
e4ad	58541	-	Patch for BASIC Call to CHKOUT
e4b7	58551	-	Unused Bytes For Future Patches		EMPTY
e4da	58586	-	Reset Character Colour
e4e0	58592	-	Pause After Finding Tape File
e4ec	58604	-	RS-232 Timing Table -- PAL		DATA
e500	58624	iobase	Get I/O Address
e505	58629	screen	Get Screen Size
e50a	58634	plot	Put / Get Row And Column
e518	58648	cint1	Initialize I/O
e544	58692	-	Clear Screen
e566	58726	-	Home Cursor
e56c	58732	-	Set Screen Pointers
e59a	58778	-	Set I/O Defaults (Unused Entry)
e5a0	58784	-	Set I/O Defaults
e5b4	58804	lp2	Get Character From Keyboard Buffer
e5ca	58826	-	Input From Keyboard
e632	58930	-	Input From Screen or Keyboard
e684	59012	-	Quotes Test
e691	59025	-	Set Up Screen Print
e6b6	59062	-	Advance Cursor
e6ed	59117	-	Retreat Cursor
e701	59137	-	Back on to Previous Line
e716	59158	-	Output to Screen
e72a	59178	-	-unshifted characters-
e7d4	59348	-	-shifted characters-
e87c	59516	-	Go to Next Line
e891	59537	-	Output <CR>
e8a1	59553	-	Check Line Decrement
e8b3	59571	-	Check Line Increment
e8cb	59595	-	Set Colour Code
e8da	59610	-	Colour Code Table
e8ea	59626	-	Scroll Screen
e965	59749	-	Open A Space On The Screen
e9c8	59848	-	Move A Screen Line
e9e0	59872	-	Syncronise Colour Transfer
e9f0	59888	-	Set Start of Line
e9ff	59903	-	Clear Screen Line
ea13	59923	-	Print To Screen
ea24	59940	-	Syncronise Colour Pointer
ea31	59953	-	Main IRQ Entry Point
ea87	60039	scnkey	Scan Keyboard
eadd	60125	-	Process Key Image
eb79	60281	-	Pointers to Keyboard decoding tables	WORD
eb81	60289	-	Keyboard 1 -- unshifted			DATA
ebc2	60354	-	Keyboard 2 -- Shifted			DATA
ec03	60419	-	Keyboard 3 -- Commodore			DATA
ec44	60484	-	Graphics/Text Control
ec78	60536	-	Keyboard 4 -- Control			DATA
ecb9	60601	-	Video Chip Setup Table			DATA
ece7	60647	-	Shift-Run Equivalent
ecf0	60656	-	Low Byte Screen Line Addresses		DATA
ed09	60681	talk	Send TALK Command on Serial Bus
ed0c	60684	listn	Send LISTEN Command on Serial Bus
ed40	60736	-	Send Data On Serial Bus
edad	60845	-	Flag Errors
edad	60845	-	Status #80 - device not present
edb0	60848	-	Status #03 - write timeout
edb9	60857	second	Send LISTEN Secondary Address
edbe	60862	-	Clear ATN
edc7	60871	tksa	Send TALK Secondary Address
edcc	60876	-	Wait For Clock
eddd	60893	ciout	Send Serial Deferred
edef	60911	untlk	Send UNTALK / UNLISTEN
ee13	60947	acptr	Receive From Serial Bus
ee85	61061	-	Serial Clock On
ee8e	61070	-	Serial Clock Off
ee97	61079	-	Serial Output 1
eea0	61088	-	Serial Output 0
eea9	61097	-	Get Serial Data And Clock In
eeb3	61107	-	Delay 1 ms
eebb	61115	-	RS-232 Send
ef06	61190	-	Send New RS-232 Byte
ef2e	61230	-	'No DSR' / 'No CTS' Error
ef39	61241	-	Disable Timer
ef4a	61258	-	Compute Bit Count
ef59	61273	-	RS-232 Receive
ef7e	61310	-	Set Up To Receive
ef90	61328	-	Process RS-232 Byte
efe1	61409	-	Submit to RS-232
f00d	61453	-	No DSR (Data Set Ready) Error
f017	61463	-	Send to RS-232 Buffer
f04d	61517	-	Input From RS-232
f086	61574	-	Get From RS-232
f0a4	61604	-	Serial Bus Idle
f0bd	61629	-	Table of Kernal I/O Messages		DATA
f12b	61739	-	Print Message if Direct
f12f	61743	-	Print Message
f13e	61758	getin	Get a byte
f157	61783	chrin	Input a byte
f199	61849	-	Get From Tape / Serial / RS-232
f1ca	61898	chrout	Output One Character
f20e	61966	chkin	Set Input Device
f250	62032	chkout	Set Output Device
f291	62097	close	Close File
f30f	62223	-	Find File
f31f	62239	-	Set File values
f32f	62255	clall	Abort All Files
f333	62259	clrchn	Restore Default I/O
f34a	62282	open	Open File
f3d5	62421	-	Send Secondary Address
f409	62473	-	Open RS-232
f49e	62622	load	Load RAM
f4b8	62648	-	Load File From Serial Bus
f533	62771	-	Load File From Tape
f5af	62927	-	Print "SEARCHING"
f5c1	62913	-	Print Filename
f5d2	62930	-	Print "LOADING / VERIFYING"
f5dd	62941	save	Save RAM
f5fa	62970	-	Save to Serial Bus
f659	63065	-	Save to Tape
f68f	63119	-	Print "SAVING"
f69b	63131	udtim	Bump Clock
f6dd	63197	rdtim	Get Time
f6e4	63204	settim	Set Time
f6ed	63213	stop	Check STOP Key
f6fb	63227	-	Output I/O Error Messages
f6fb	63227	-	'too many files'
f6fe	63230	-	'file open'
f701	63233	-	'file not open'
f704	63236	-	'file not found'
f707	63239	-	'device not present'
f70a	63242	-	'not input file'
f70d	63245	-	'not output file'
f710	63248	-	'missing filename'
f713	63251	-	'illegal device number'
f72d	63277	-	Find Any Tape Header
f76a	63338	-	Write Tape Header
f7d0	63440	-	Get Buffer Address
f7d7	63447	-	Set Buffer Stat / End Pointers
f7ea	63466	-	Find Specific Tape Header
f80d	63501	-	Bump Tape Pointer
f817	63511	-	Print "PRESS PLAY ON TAPE"
f82e	63534	-	Check Tape Status
f838	63544	-	Print "PRESS RECORD..."
f841	63553	-	Initiate Tape Read
f864	63588	-	Initiate Tape Write
f875	63605	-	Common Tape Code
f8d0	63696	-	Check Tape Stop
f8e2	63714	-	Set Read Timing
f92c	63788	-	Read Tape Bits
fa60	64096	-	Store Tape Characters
fb8e	64398	-	Reset Tape Pointer
fb97	64407	-	New Character Setup
fba6	64422	-	Send Tone to Tape
fbc8	64456	-	Write Data to Tape
fbcd	64461	-	IRQ Entry Point
fc57	64599	-	Write Tape Leader
fc93	64659	-	Restore Normal IRQ
fcb8	64696	-	Set IRQ Vector
fcca	64714	-	Kill Tape Motor
fcd1	64721	-	Check Read / Write Pointer
fcdb	64731	-	Bump Read / Write Pointer
fce2	64738	-	Power-Up RESET Entry
fd02	64770	-	Check For 8-ROM
fd12	64786	-	8-ROM Mask '80CBM'			DATA
fd15	64789	restor	Restore Kernal Vectors (at 0314)
fd1a	64794	vector	Change Vectors For User
fd30	64816	-	Kernal Reset Vectors			WORD
fd50	64848	ramtas	Initialise System Constants
fd9b	64923	-	IRQ Vectors For Tape I/O		WORD
fda3	64931	ioinit	Initialise I/O
fddd	64989	-	Enable Timer
fdf9	65017	setnam	Set Filename
fe00	65024	setlfs	Set Logical File Parameters
fe07	65031	readst	Get I/O Status Word
fe18	65048	setmsg	Control OS Messages
fe21	65057	settmo	Set IEEE Timeout
fe25	65061	memtop	Read / Set Top of Memory
fe34	65076	membot	Read / Set Bottom of Memory
fe43	65091	-	NMI Transfer Entry
fe66	65126	-	Warm Start Basic [BRK]
febc	65212	-	Exit Interrupt
fec2	65218	-	RS-232 Timing Table - NTSC	DATA
fed6	65238	-	NMI RS-232 In
ff07	65287	-	NMI RS-232 Out
ff43	65347	-	Fake IRQ Entry
ff48	65352	-	IRQ Entry
ff5b	65371	cint	Initialize screen editor
ff80	65408	-	Kernal Version Number [03]	DATA
;
; C64 Kernal Jump Table
;
ff81	jmp $ff5b	cint		Init Editor & Video Chips
ff84	jmp $fd23	ioinit		Init I/O Devices, Ports & Timers
ff87	jmp $fd50	ramtas		Init Ram & Buffers
ff8a	jmp $fd15	restor		Restore Vectors
ff8d	jmp $fd1a	vector		Change Vectors For User
ff90	jmp $fe18	setmsg		Control OS Messages
ff93	jmp $edb9	secnd		Send SA After Listen
ff96	jmp $edc7	tksa		Send SA After Talk
ff99	jmp $fe25	memtop		Set/Read System RAM Top
ff9c	jmp $fe34	membot		Set/Read System RAM Bottom
ff9f	jmp $ea87	scnkey		Scan Keyboard
ffa2	jmp $fe21	settmo		Set Timeout In IEEE
ffa5	jmp $ee13	acptr		Handshake Serial Byte In
ffa8	jmp $eddd	ciout		Handshake Serial Byte Out
ffab	jmp $edef	untalk		Command Serial Bus UNTALK
ffae	jmp $edfe	unlsn		Command Serial Bus UNLISTEN
ffb1	jmp $ed0c	listn		Command Serial Bus LISTEN
ffb4	jmp $ed09	talk		Command Serial Bus TALK
ffb7	jmp $fe07	readss		Read I/O Status Word
ffba	jmp $fe00	setlfs		Set Logical File Parameters
ffbd	jmp $fdf9	setnam		Set Filename
ffc0	jmp ($031a)	(iopen)		Open Vector [f34a]
ffc3	jmp ($031c)	(iclose)   	Close Vector [f291]
ffc6	jmp ($031e)	(ichkin)   	Set Input [f20e]
ffc9	jmp ($0320)	(ichkout)	Set Output [f250]
ffcc	jmp ($0322)	(iclrch)	Restore I/O Vector [f333]
ffcf	jmp ($0324)	(ichrin)	Input Vector, chrin [f157]
ffd2	jmp ($0326)	(ichrout)	Output Vector, chrout [f1ca]
ffd5	jmp $f49e	load		Load RAM From Device
ffd8	jmp $f5dd	save		Save RAM To Device
ffdb	jmp $f6e4	settim		Set Real-Time Clock
ffde	jmp $f6dd	rdtim		Read Real-Time Clock
ffe1	jmp ($0328)	(istop)		Test-Stop Vector [f6ed]
ffe4	jmp ($032a)	(igetin)	Get From Keyboad [f13e]
ffe7	jmp ($032c)	(iclall)	Close All Channels And Files [f32f]
ffea	jmp $f69b	udtim		Increment Real-Time Clock
ffed	jmp $e505	screen		Return Screen Organization
fff0	jmp $e50a	plot		Read / Set Cursor X/Y Position
fff3	jmp $e500	iobase		Return I/O Base Address

;fff6	Vectors

fff6	[5252]		-
fff8	[5942]		SYSTEM

;fffa	Transfer Vectors
fffa	[fe43]		NMI
fffc	[fce2]		RESET
fffe	[ff48]		IRQ


*********

End of the Project 64 etext of Commodore_64_ROM_Memory_Map.doc

*********

The Project 64 etext of Commodore_64_ROM_Memory_Map.txt

*********

; ---<C64rom.lib>---
;
;	Commodore 64 ROM Memory Map
;
; BASIC interpreter ROM ($A000 - $BFFF)
;
; label	  address	type	comments
restart	= $a000
stmdsp	= $a00c
fundsp	= $a052
optab	= $a080
reslst	= $a09e
msclst	= $a129
oplist	= $a140
funlst	= $a14d
errtab	= $a19e
errptr	= $a328
okk	= $a364
fndfor	= $a38a
bltu	= $a3b8
getstk	= $a3fb
reason	= $a408
omerr	= $a435
error	= $a437
errfin	= $a469
ready	= $a474
main	= $a480
main1	= $a49c
inslin	= $a4a2
linkprg	= $a533
inlin	= $a560
crunch	= $a579
fndlin	= $a613
scrtch	= $a642
clear	= $a65e
stxpt	= $a68e
list	= $a69c
qplop	= $a717
for	= $a742
newstt	= $a7ae
ckeol	= $a7c4
gone	= $a7e1
gone3	= $a7ed
restor	= $a81d
stop	= $a82c
cont	= $a857
run	= $a871
gosub	= $a883
goto	= $a8a0
return	= $a8d2
data	= $a8f8
datan	= $a906
if	= $a928
rem	= $a93b
ongoto	= $a94b
linget	= $a96b
let	= $a9a5
putint	= $a9c4
ptflpt	= $a9d6
putstr	= $a9d9
puttim	= $a9e3
getspt	= $aa2c
printn	= $aa80
cmd	= $aa86
strdon	= $aa9a
print	= $aaa0
varop	= $aab8
crdo	= $aad7
comprt	= $aae8
strout	= $ab1e
outspc	= $ab3b
doagin	= $ab4d
get	= $ab7b
inputn	= $aba5
input	= $abbf
bufful	= $abea
qinlin	= $abf9
read	= $ac06
rdget	= $ac35
exint	= $acfc
next	= $ad1e
donext	= $ad61
frmnum	= $ad8a
frmevl	= $ad9e
eval	= $ae83
pival	= $aea8
qdot	= $aead
parchk	= $aef1
chkcls	= $aef7
synerr	= $af08
domin	= $af0d
rsvvar	= $af14
isvar	= $af28
tisasc	= $af48
isfun	= $afa7
strfun	= $afb1
numfun	= $afd1
orop	= $afe6
dorel	= $b016
numrel	= $b01b
strrel	= $b02e
dim	= $b07e
ptrget	= $b08b
ordvar	= $b0e7
isletc	= $b113
notfns	= $b11d
notevl	= $b128
aryget	= $b194
n32768	= $b1a5		data
facinx	= $b1aa
intidx	= $b1b2
ayint	= $b1bf
isary	= $b1d1
fndary	= $b218
bserr	= $b245
notfdd	= $b261
inlpn2	= $b30e
umult	= $b34c
fre	= $b37d
givayf	= $b391
pos	= $b39e
errdir	= $b3a6
def	= $b3b3
getfnm	= $b3e1
fndoer	= $b3f4
strd	= $b465
strlit	= $b487
putnw1	= $b4d5
getspa	= $b4f4
garbag	= $b526
dvars	= $b5bd
grbpas	= $b606
cat	= $b63d
movins	= $b67a
frestr	= $b6a3
frefac	= $b6db
chrd	= $b6ec
leftd	= $b700
rightd	= $b72c
midd	= $b737
pream	= $b761
len	= $b77c
len1	= $b782
asc	= $b78b
gtbytc	= $b79b
val	= $b7ad
strval	= $b7b5
getnum	= $b7eb
getadr	= $b7f7
peek	= $b80d
poke	= $b824
wait	= $b82d
faddh	= $b849
fsub	= $b850
fadd5	= $b862
fadd	= $b867
negfac	= $b947
overr	= $b97e
mulshf	= $b983
fone	= $b9bc		data
log	= $b9ea
fmult	= $ba28
mulply	= $ba59
conupk	= $ba8c
muldiv	= $bab7
mldvex	= $bad4
mul10	= $bae2
tenc	= $baf9		data
div10	= $bafe
fdiv	= $bb07
fdivt	= $bb0f
movfm	= $bba2
mov2f	= $bbc7
movfa	= $bbfc
movaf	= $bc0c
round	= $bc1b
sign	= $bc2b
sgn	= $bc39
abs	= $bc58
fcomp	= $bc5b
qint	= $bc9b
int	= $bccc
fin	= $bcf3
n0999	= $bdb3		data
inprt	= $bdc2
fout	= $bddd
foutim	= $be68
fhalf	= $bf11		data
sqr	= $bf71
fpwrt	= $bf7b
negop	= $bfb4
logeb2	= $bfbf		data
exp	= $bfed
;
;
;	C64 KERNEL ROM
;
(exp	= $e000
polyx	= $e043
rmulc	= $e08d		data
rnd	= $e097
bioerr	= $e0f9
bchout	= $e10c
bchin	= $e112
bckout	= $e118
bckin	= $e11e
bgetin	= $e124
sys	= $e12a
savet	= $e156
verfyt	= $e165
opent	= $e1be
closet	= $e1c7
slpara	= $e1d4
combyt	= $e200
deflt	= $e206
cmmerr	= $e20e
ocpara	= $e219
cos	= $e264
sin	= $e26b
tan	= $e2b4
pi2	= $e2e0		data
atn	= $e30e
atncon	= $e33e		data
bassft	= $e37b
init	= $e394
initat	= $e3a2
rndsed	= $e3ba
initcz	= $e3bf
initms	= $e422
bvtrs	= $e447		data
initv	= $e453
words	= $e45f
-	= $e4ad
-	= $e4b7		illegal
-	= $e4da
-	= $e4e0
-	= $e4ec		data
iobase	= $e500
screen	= $e505
plot	= $e50a
cint1	= $e518
-	= $e544
-	= $e566
-	= $e56c
	= ;
-	= $e59a
lp2	= $e5b4
-	= $e5ca
-	= $e632
-	= $e684
-	= $e691
-	= $e6b6
-	= $e6ed
-	= $e701
-	= $e716
-	= $e87c
-	= $e891
-	= $e8a1
-	= $eacb
-	= $e8da
-	= $e8ea
-	= $e965
-	= $e9c8
-	= $e9e0
-	= $e9f0
-	= $e9ff
-	= $ea13
-	= $ea24
-	= $ea31
scnkey	= $ea87
-	= $eadd		data
-	= $eb79		data
-	= $eb81		data
-	= $ebc2		data
-	= $ec03
-	= $ec44		data
-	= $ec78		data
-	= $ecb9
-	= $ece7		data
-	= $ecf0
talk	= $ed09
-	= $ed40
-	= $edad
second	= $edb9
-	= $edbe
tksa	= $edc7
-	= $edcc
ciout	= $eddd
untlk	= $edef
acptr	= $ee13
-	= $ee85
-	= $ee8e
-	= $ee97
-	= $eea0
-	= $eea9
-	= $eeb3
-	= $eebb
-	= $ef06
-	= $ef2e
-	= $ef39
-	= $ef4a
-	= $ef59
-	= $ef7e
-	= $ef90
-	= $efe1
-	= $f00d
-	= $f017
-	= $f04d
-	= $f086
-	= $f0a4
-	= $f0bd
-	= $f128
getin	= $f13e
chrin	= $f157
-	= $f199
chrout	= $f1ca
chkin	= $f20e
chkout	= $f250
close	= $f291
-	= $f30f
-	= $f31f
clall	= $f32f
clrchn	= $f333
open	= $f34a
-	= $f3d5
-	= $f409
load	= $f49e
;
;--------------
;
save	= $f5dd
udtim	= $f69b
rdtim	= $f6dd
settim	= $f6e4
stop	= $f6ed
restor	= $fd15
vector	= $fd1a
ramtas	= $fd50
ioinit	= $fda3
setnam	= $fdf9
setlfs	= $fe00
readst	= $fe07
setmsg	= $fe18
settmo	= $fe21
memtop	= $fe25
membot	= $fe34
cint	= $fe58
;
;
; C64 KERNEL call addresses
;
acptr	= $ffa5
chkin	= $ffc6
chkout	= $ffc9
chrin	= $ffcf
chrout	= $ffd2
ciout	= $ffa8
cint	= $ff81
clall	= $ffe7
close	= $ffc3
clrchn	= $ffcc
getin	= $ffe4
iobase	= $fff3
ioinit	= $ff84
listen	= $ffb1
load	= $ffd5
membot	= $ff9c
memtop	= $ff99
open	= $ffc0
plot	= $fff0
ramtas	= $ff87
rdtim	= $ffde
readst	= $ffb7
restor	= $ff8a
save	= $ffd8
scnkey	= $ff9f
screen	= $ffed
second	= $ff93
setlfs	= $ffba
setmsg	= $ff90
setnam	= $ffbd
settim	= $ffdb
settmo	= $ffa2
stop	= $ffe1
talk	= $ffb4
tksa	= $ff96
udtim	= $ffea
unlsn	= $ffae
untlk	= $ffab
vector	= $ff8d
;

*********

End of the Project 64 etext of Commodore_64_ROM_Memory_Map.txt

*********

End of the Project 64 etext 64MAP11.TXT, several Commodore 64 memory
maps.

*********