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; Prog8 definitions for the Commodore-64
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; Including memory registers, I/O registers, Basic and Kernal subroutines.
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;
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; Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
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;
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; indent format: TABS, size=8
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~ c64 {
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const uword ESTACK_LO = $ce00 ; evaluation stack (lsb)
const uword ESTACK_HI = $cf00 ; evaluation stack (msb)
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&ubyte SCRATCH_ZPB1 = $02 ; scratch byte 1 in ZP
&ubyte SCRATCH_ZPREG = $03 ; scratch register in ZP
&ubyte SCRATCH_ZPREGX = $fa ; temp storage for X register (stack pointer)
&uword SCRATCH_ZPWORD1 = $fb ; scratch word in ZP ($fb/$fc)
&uword SCRATCH_ZPWORD2 = $fd ; scratch word in ZP ($fd/$fe)
&ubyte TIME_HI = $a0 ; software jiffy clock, hi byte
&ubyte TIME_MID = $a1 ; .. mid byte
&ubyte TIME_LO = $a2 ; .. lo byte. Updated by IRQ every 1/60 sec
&ubyte STKEY = $91 ; various keyboard statuses (updated by IRQ)
&ubyte SFDX = $cb ; current key pressed (matrix value) (updated by IRQ)
&ubyte COLOR = $0286 ; cursor color
&ubyte HIBASE = $0288 ; screen base address / 256 (hi-byte of screen memory address)
&uword CINV = $0314 ; IRQ vector
&uword NMI_VEC = $FFFA ; 6502 nmi vector, determined by the kernal if banked in
&uword RESET_VEC = $FFFC ; 6502 reset vector, determined by the kernal if banked in
&uword IRQ_VEC = $FFFE ; 6502 interrupt vector, determined by the kernal if banked in
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; the default addresses for the character screen chars and colors
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const uword Screen = $0400 ; to have this as an array[40*25] the compiler would have to support array size > 255
const uword Colors = $d800 ; to have this as an array[40*25] the compiler would have to support array size > 255
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; the default locations of the 8 sprite pointers (store address of sprite / 64)
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&ubyte SPRPTR0 = 2040
&ubyte SPRPTR1 = 2041
&ubyte SPRPTR2 = 2042
&ubyte SPRPTR3 = 2043
&ubyte SPRPTR4 = 2044
&ubyte SPRPTR5 = 2045
&ubyte SPRPTR6 = 2046
&ubyte SPRPTR7 = 2047
&ubyte[8] SPRPTR = 2040 ; the 8 sprite pointers as an array.
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; ---- VIC-II 6567/6569/856x registers ----
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&ubyte SP0X = $d000
&ubyte SP0Y = $d001
&ubyte SP1X = $d002
&ubyte SP1Y = $d003
&ubyte SP2X = $d004
&ubyte SP2Y = $d005
&ubyte SP3X = $d006
&ubyte SP3Y = $d007
&ubyte SP4X = $d008
&ubyte SP4Y = $d009
&ubyte SP5X = $d00a
&ubyte SP5Y = $d00b
&ubyte SP6X = $d00c
&ubyte SP6Y = $d00d
&ubyte SP7X = $d00e
&ubyte SP7Y = $d00f
&ubyte[16] SPXY = $d000 ; the 8 sprite X and Y registers as an array.
&uword[8] SPXYW = $d000 ; the 8 sprite X and Y registers as a combined xy word array.
&ubyte MSIGX = $d010
&ubyte SCROLY = $d011
&ubyte RASTER = $d012
&ubyte LPENX = $d013
&ubyte LPENY = $d014
&ubyte SPENA = $d015
&ubyte SCROLX = $d016
&ubyte YXPAND = $d017
&ubyte VMCSB = $d018
&ubyte VICIRQ = $d019
&ubyte IREQMASK = $d01a
&ubyte SPBGPR = $d01b
&ubyte SPMC = $d01c
&ubyte XXPAND = $d01d
&ubyte SPSPCL = $d01e
&ubyte SPBGCL = $d01f
&ubyte EXTCOL = $d020 ; border color
&ubyte BGCOL0 = $d021 ; screen color
&ubyte BGCOL1 = $d022
&ubyte BGCOL2 = $d023
&ubyte BGCOL4 = $d024
&ubyte SPMC0 = $d025
&ubyte SPMC1 = $d026
&ubyte SP0COL = $d027
&ubyte SP1COL = $d028
&ubyte SP2COL = $d029
&ubyte SP3COL = $d02a
&ubyte SP4COL = $d02b
&ubyte SP5COL = $d02c
&ubyte SP6COL = $d02d
&ubyte SP7COL = $d02e
&ubyte[8] SPCOL = $d027
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; ---- end of VIC-II registers ----
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; ---- CIA 6526 1 & 2 registers ----
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&ubyte CIA1PRA = $DC00 ; CIA 1 DRA, keyboard column drive (and joystick control port #2)
&ubyte CIA1PRB = $DC01 ; CIA 1 DRB, keyboard row port (and joystick control port #1)
&ubyte CIA1DDRA = $DC02 ; CIA 1 DDRA, keyboard column
&ubyte CIA1DDRB = $DC03 ; CIA 1 DDRB, keyboard row
&ubyte CIA1TAL = $DC04 ; CIA 1 timer A low byte
&ubyte CIA1TAH = $DC05 ; CIA 1 timer A high byte
&ubyte CIA1TBL = $DC06 ; CIA 1 timer B low byte
&ubyte CIA1TBH = $DC07 ; CIA 1 timer B high byte
&ubyte CIA1TOD10 = $DC08 ; time of day, 1/10 sec.
&ubyte CIA1TODSEC = $DC09 ; time of day, seconds
&ubyte CIA1TODMMIN = $DC0A ; time of day, minutes
&ubyte CIA1TODHR = $DC0B ; time of day, hours
&ubyte CIA1SDR = $DC0C ; Serial Data Register
&ubyte CIA1ICR = $DC0D
&ubyte CIA1CRA = $DC0E
&ubyte CIA1CRB = $DC0F
&ubyte CIA2PRA = $DD00 ; CIA 2 DRA, serial port and video address
&ubyte CIA2PRB = $DD01 ; CIA 2 DRB, RS232 port / USERPORT
&ubyte CIA2DDRA = $DD02 ; CIA 2 DDRA, serial port and video address
&ubyte CIA2DDRB = $DD03 ; CIA 2 DDRB, RS232 port / USERPORT
&ubyte CIA2TAL = $DD04 ; CIA 2 timer A low byte
&ubyte CIA2TAH = $DD05 ; CIA 2 timer A high byte
&ubyte CIA2TBL = $DD06 ; CIA 2 timer B low byte
&ubyte CIA2TBH = $DD07 ; CIA 2 timer B high byte
&ubyte CIA2TOD10 = $DD08 ; time of day, 1/10 sec.
&ubyte CIA2TODSEC = $DD09 ; time of day, seconds
&ubyte CIA2TODMIN = $DD0A ; time of day, minutes
&ubyte CIA2TODHR = $DD0B ; time of day, hours
&ubyte CIA2SDR = $DD0C ; Serial Data Register
&ubyte CIA2ICR = $DD0D
&ubyte CIA2CRA = $DD0E
&ubyte CIA2CRB = $DD0F
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; ---- end of CIA registers ----
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; ---- SID 6581/8580 registers ----
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&ubyte FREQLO1 = $D400 ; channel 1 freq lo
&ubyte FREQHI1 = $D401 ; channel 1 freq hi
&uword FREQ1 = $D400 ; channel 1 freq (word)
&ubyte PWLO1 = $D402 ; channel 1 pulse width lo (7-0)
&ubyte PWHI1 = $D403 ; channel 1 pulse width hi (11-8)
&uword PW1 = $D402 ; channel 1 pulse width (word)
&ubyte CR1 = $D404 ; channel 1 voice control register
&ubyte AD1 = $D405 ; channel 1 attack & decay
&ubyte SR1 = $D406 ; channel 1 sustain & release
&ubyte FREQLO2 = $D407 ; channel 2 freq lo
&ubyte FREQHI2 = $D408 ; channel 2 freq hi
&uword FREQ2 = $D407 ; channel 2 freq (word)
&ubyte PWLO2 = $D409 ; channel 2 pulse width lo (7-0)
&ubyte PWHI2 = $D40A ; channel 2 pulse width hi (11-8)
&uword PW2 = $D409 ; channel 2 pulse width (word)
&ubyte CR2 = $D40B ; channel 2 voice control register
&ubyte AD2 = $D40C ; channel 2 attack & decay
&ubyte SR2 = $D40D ; channel 2 sustain & release
&ubyte FREQLO3 = $D40E ; channel 3 freq lo
&ubyte FREQHI3 = $D40F ; channel 3 freq hi
&uword FREQ3 = $D40E ; channel 3 freq (word)
&ubyte PWLO3 = $D410 ; channel 3 pulse width lo (7-0)
&ubyte PWHI3 = $D411 ; channel 3 pulse width hi (11-8)
&uword PW3 = $D410 ; channel 3 pulse width (word)
&ubyte CR3 = $D412 ; channel 3 voice control register
&ubyte AD3 = $D413 ; channel 3 attack & decay
&ubyte SR3 = $D414 ; channel 3 sustain & release
&ubyte FCLO = $D415 ; filter cutoff lo (2-0)
&ubyte FCHI = $D416 ; filter cutoff hi (10-3)
&uword FC = $D415 ; filter cutoff (word)
&ubyte RESFILT = $D417 ; filter resonance and routing
&ubyte MVOL = $D418 ; filter mode and main volume control
&ubyte POTX = $D419 ; potentiometer X
&ubyte POTY = $D41A ; potentiometer Y
&ubyte OSC3 = $D41B ; channel 3 oscillator value read
&ubyte ENV3 = $D41C ; channel 3 envelope value read
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; ---- end of SID registers ----
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; ---- C64 basic routines ----
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asmsub CLEARSCR () -> clobbers(A,X,Y) -> () = $E544 ; clear the screen
asmsub HOMECRSR () -> clobbers(A,X,Y) -> () = $E566 ; cursor to top left of screen
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; ---- end of C64 basic routines ----
; ---- C64 kernal routines ----
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asmsub STROUT (uword strptr @ AY) -> clobbers(A, X, Y) -> () = $AB1E ; print null-terminated string (use c64scr.print instead)
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asmsub IRQDFRT () -> clobbers(A,X,Y) -> () = $EA31 ; default IRQ routine
asmsub IRQDFEND () -> clobbers(A,X,Y) -> () = $EA81 ; default IRQ end/cleanup
asmsub CINT () -> clobbers(A,X,Y) -> () = $FF81 ; (alias: SCINIT) initialize screen editor and video chip
asmsub IOINIT () -> clobbers(A, X) -> () = $FF84 ; initialize I/O devices (CIA, SID, IRQ)
asmsub RAMTAS () -> clobbers(A,X,Y) -> () = $FF87 ; initialize RAM, tape buffer, screen
asmsub RESTOR () -> clobbers(A,X,Y) -> () = $FF8A ; restore default I/O vectors
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asmsub VECTOR (ubyte dir @ Pc, uword userptr @ XY) -> clobbers(A,Y) -> () = $FF8D ; read/set I/O vector table
asmsub SETMSG (ubyte value @ A) -> clobbers() -> () = $FF90 ; set Kernal message control flag
asmsub SECOND (ubyte address @ A) -> clobbers(A) -> () = $FF93 ; (alias: LSTNSA) send secondary address after LISTEN
asmsub TKSA (ubyte address @ A) -> clobbers(A) -> () = $FF96 ; (alias: TALKSA) send secondary address after TALK
asmsub MEMTOP (ubyte dir @ Pc, uword address @ XY) -> clobbers() -> (uword @ XY) = $FF99 ; read/set top of memory pointer
asmsub MEMBOT (ubyte dir @ Pc, uword address @ XY) -> clobbers() -> (uword @ XY) = $FF9C ; read/set bottom of memory pointer
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asmsub SCNKEY () -> clobbers(A,X,Y) -> () = $FF9F ; scan the keyboard
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asmsub SETTMO (ubyte timeout @ A) -> clobbers() -> () = $FFA2 ; set time-out flag for IEEE bus
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asmsub ACPTR () -> clobbers() -> (ubyte @ A) = $FFA5 ; (alias: IECIN) input byte from serial bus
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asmsub CIOUT (ubyte databyte @ A) -> clobbers() -> () = $FFA8 ; (alias: IECOUT) output byte to serial bus
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asmsub UNTLK () -> clobbers(A) -> () = $FFAB ; command serial bus device to UNTALK
asmsub UNLSN () -> clobbers(A) -> () = $FFAE ; command serial bus device to UNLISTEN
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asmsub LISTEN (ubyte device @ A) -> clobbers(A) -> () = $FFB1 ; command serial bus device to LISTEN
asmsub TALK (ubyte device @ A) -> clobbers(A) -> () = $FFB4 ; command serial bus device to TALK
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asmsub READST () -> clobbers() -> (ubyte @ A) = $FFB7 ; read I/O status word
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asmsub SETLFS (ubyte logical @ A, ubyte device @ X, ubyte address @ Y) -> clobbers() -> () = $FFBA ; set logical file parameters
asmsub SETNAM (ubyte namelen @ A, str filename @ XY) -> clobbers() -> () = $FFBD ; set filename parameters
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asmsub OPEN () -> clobbers(A,X,Y) -> () = $FFC0 ; (via 794 ($31A)) open a logical file
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asmsub CLOSE (ubyte logical @ A) -> clobbers(A,X,Y) -> () = $FFC3 ; (via 796 ($31C)) close a logical file
asmsub CHKIN (ubyte logical @ X) -> clobbers(A,X) -> () = $FFC6 ; (via 798 ($31E)) define an input channel
asmsub CHKOUT (ubyte logical @ X) -> clobbers(A,X) -> () = $FFC9 ; (via 800 ($320)) define an output channel
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asmsub CLRCHN () -> clobbers(A,X) -> () = $FFCC ; (via 802 ($322)) restore default devices
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asmsub CHRIN () -> clobbers(Y) -> (ubyte @ A) = $FFCF ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
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asmsub CHROUT (ubyte char @ A) -> clobbers() -> () = $FFD2 ; (via 806 ($326)) output a character
asmsub LOAD (ubyte verify @ A, uword address @ XY) -> clobbers() -> (ubyte @Pc, ubyte @ A, ubyte @ X, ubyte @ Y) = $FFD5 ; (via 816 ($330)) load from device
asmsub SAVE (ubyte zp_startaddr @ A, uword endaddr @ XY) -> clobbers() -> (ubyte @ Pc, ubyte @ A) = $FFD8 ; (via 818 ($332)) save to a device
asmsub SETTIM (ubyte low @ A, ubyte middle @ X, ubyte high @ Y) -> clobbers() -> () = $FFDB ; set the software clock
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asmsub RDTIM () -> clobbers() -> (ubyte @ A, ubyte @ X, ubyte @ Y) = $FFDE ; read the software clock
asmsub STOP () -> clobbers(A,X) -> (ubyte @ Pz, ubyte @ Pc) = $FFE1 ; (via 808 ($328)) check the STOP key
asmsub GETIN () -> clobbers(X,Y) -> (ubyte @ A) = $FFE4 ; (via 810 ($32A)) get a character
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asmsub CLALL () -> clobbers(A,X) -> () = $FFE7 ; (via 812 ($32C)) close all files
asmsub UDTIM () -> clobbers(A,X) -> () = $FFEA ; update the software clock
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asmsub SCREEN () -> clobbers() -> (ubyte @ X, ubyte @ Y) = $FFED ; read number of screen rows and columns
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asmsub PLOT (ubyte dir @ Pc, ubyte col @ Y, ubyte row @ X) -> clobbers() -> (ubyte @ X, ubyte @ Y) = $FFF0 ; read/set position of cursor on screen. Use c64scr.plot for a 'safe' wrapper that preserves X.
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asmsub IOBASE () -> clobbers() -> (uword @ XY) = $FFF3 ; read base address of I/O devices
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; ---- end of C64 kernal routines ----
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}
