Atari 6502 System Equations and Macros#
The origin of this file is not clear. The filename and file-path naming suggest it comes from a crosscompiler (maybe PDP-11 or VAX). It might be the system equates used by Atari internally on their crosscompilers.
Besides Atari 8bit Equates it also contains Equates for KIM-1
and some kind of a virtual machine interpreter (maybe Forth, maybe a 6502 CPU Emulator)
The data "
;<HESS.ATARI>SYSMAC.SML.27 8-Mar-82 08:39:38, Edit by HESS
;6502 SYSTEM -*-MACRO-*- DEFINITIONS
; ***** ATARI SYSTEM DEFS *****
.MACRO ATARI
; VECTOR TABLE
EDITRV =$E400 ;EDITOR
SCRENV =$E410 ;TELEVISION SCREEN
KEYBDV =$E420 ;KEYBOARD
PRINTV =$E430 ;PRINTER
CASETV =$E440 ;CASSETTE
; JUMP VECTOR TABLE
DISKIV =$E450 ;DISK INITIALIZATION
DSKINV =$E453 ;DISK INTERFACE
CIOV =$E456 ;CIO ROUTINE
SIOV =$E459 ;SIO ROUTINE
SETVBV =$E45C ;SET VERTICAL BLANK VECTORS
SYSVBV =$E45F ;SYSTEM VERTICAL BLANK ROUTINE
XITVBV =$E462 ;EXIT VERTICAL BLANK ROUTINE
SIOINV =$E465 ;SIO INIT
SENDEV =$E468 ;SEND ENABLE ROUTINE
INTINV =$E46B ;INTERRUPT HANDLER INIT
CIOINV =$E46E ;CIO INIT
BLKBDV =$E471 ;BLACKBOARD MODE
WARMSV =$E474 ;WARM START ENTRY POINT
COLDSV =$E477 ;COLD START ENTRY POINT
RBLOKV =$E47D ;CASSETTE READ BLOCK VECTOR
DSOPIV =$E480 ;CASSETTE OPEN FOR INPUT VECTOR
; SOME USEFUL INTERNAL ROUTINES
KGETCH =$F6E2 ;GET CHAR FROM KEYBOARD
EOUTCH =$F6A4 ;OUTPUT CHAR TO SCREEN
PUTLIN =$F385 ;OUTPUT LINE TO IOCB#0
; COMMAND CODES FOR IOCB
OPEN =$03 ;OPEN FOR INPUT/OUTPUT
GETREC =$05 ;GET RECORD (TEXT)
GETCHR =$07 ;GET CHARACTER(S)
PUTREC =$09 ;PUT RECORD (TEXT)
PUTCHR =$0B ;PUT CHARACTER(S)
CLOSE =$0C ;CLOSE DEVICE
STATIS =$0D ;STATUS REQUEST
SPECIL =$0E ;SPECIAL ENTRY COMMANDS
; SPECIAL ENTRY COMMANDS
DRAWLN =$11 ;DRAW LINE
FILLIN =$12 ;DRAW LINE WITH RIGHT FILL
RENAME =$20 ;RENAME DISK FILE
DELETE =$21 ;DELETE DISK FILE
FORMAT =$22 ;FORMAT DISK
LOCKFL =$23 ;LOCK FILE (READ ONLY)
UNLOCK =$24 ;UNLOCK FILE
POINT =$25 ;POINT SECTOR
NOTE =$26 ;NOTE SECTOR
CCIO =$28 ;CONCURRENT I/O MODE
IOCFRE =$FF ;IOCB "FREE"
; AUX1 VALUES FOR OPEN
APPEND =$01 ;OPEN FOR APPEND
DIRECT =$02 ;OPEN FOR DIRECTORY ACCESS
OPNIN =$04 ;OPEN FOR INPUT
OPNOT =$08 ;OPEN FOR OUTPUT
OPNINO =OPNIN!OPNOT ;OPEN FOR INPUT/OUTPUT
MXDMOD =$10 ;OPEN FOR MIXED MODE
INSCLR =$20 ;OPEN WITHOUT CLEARING SCREEN
; OS STATUS CODES
SUCCES =$01 ;SUCCESSFUL OPERATION
BRKABT =$80 ;(128) BREAK KEY ABORT
PRVOPN =$81 ;(129) IOCB ALREADY OPEN
NONDEV =$82 ;(130) NON-EX DEVICE
WRONLY =$83 ;(131) IOCB OPENED FOR WRITE ONLY
NVALID =$84 ;(132) INVALID COMMAND
NOTOPN =$85 ;(133) DEVICE OR FILE NOT OPEN
BADIOC =$86 ;(134) INVALID IOCB NUMBER
RDONLY =$87 ;(135) IOCB OPENED FOR READ ONLY
EOFERR =$88 ;(136) END OF FILE
TRNRCD =$89 ;(137) TRUNCATED RECORD
TIMOUT =$8A ;(138) DEVICE TIMEOUT
DNACK =$8B ;(139) DEVICE DOES NOT ACK COMMAND
FRMERR =$8C ;(140) SERIAL BUS FRAMING ERROR
CRSROR =$8D ;(141) CURSOR OUT OF RANGE
OVRRUN =$8E ;(142) SERIAL BUS DATA OVERRUN
CHKERR =$8F ;(143) SERIAL BUS CHECKSUM ERROR
DERROR =$90 ;(144) DEVICE ERROR (OPERATION INCOMPLETE)
BADMOD =$91 ;(145) BAD SCREEN MODE NUMBER
FNCNOT =$92 ;(146) FUNCTION NOT IN HANDLER
SCRMEM =$93 ;(147) INSUFFICIENT MEMORY FOR SCREEN MODE
; PAGE 0 LOCATIONS
LINZBS =$00 ;LINBUG STORAGE
; THESE LOCS ARE NOT CLEARED
CASINI =$02 ;CASSETTE INIT LOC
RAMLO =$04 ;RAM POINTER FOR MEM TEST
TRAMSZ =$06 ;TEMP LOC FOR RAM SIZE
TSTDAT =$07 ;RAM TEST DATA LOC
; CLEARED ON COLDSTART ONLY
WARMST =$08 ;WARM START FLAG
BOOTQ =$09 ;SUCCESSFUL BOOT FLAG
DOSVEC =$0A ;DOS START VECTOR
DOSINI =$0C ;DOS INIT ADDRESS
APPMHI =$0E ;APPLICATION MEM HI LIMIT
; CLEARED ON COLD OR WARM START
INTZBS =$10 ; START OF OS RAM CLEAR LOC => $7F
POKMSK =$10 0x19 ;SYSTEM MASK FOR POKEY IRQ ENABLE
BRKKEY =$11 ;BREAK KEY FLAG
RTCLOK =$12 ;REAL TIME CLOCK (60HZ OR 16.66666 MS)
BUFADR =$15 ;INDIRECT BUFFER ADDRESS REG
ICCOMT =$17 ;COMMAND FOR VECTOR HANDLER
DSKFMS =$18 ;DISK FILE MANAGER POINTER
DSKUTL =$1A ;DISK UTILITIES POINTER
PTIMOT =$1C ;PRINTER TIME OUT REGISTER
PBPNT =$1D ;PRINT BUFFER POINTER
PBUFSZ =$1E ;PRINT BUFFER SIZE
PTEMP =$1F ;TEMP REG0x1D
ZIOCB =$20 ;PAGE 0 I/O CONTROL BLOCK
IOCBSZ =16 ;NUMBER OF BYTES / IOCB
MAXIOC =8*IOCBSZ ;LENGTH OF IOCB AREA
IOCBAS =ZIOCB
ICHIDZ =$20 ;HANDLER INDEX NUMBER ($FF := IOCB FREE)
ICDNOZ =$21 ;DEVICE NUMBER (DRIVE NUMBER)
ICCOMZ =$22 ;COMMAND CODE
ICSTAZ =$23 ;STATUS OF LAST IOCB ACTION
ICBALZ =$24 ;BUFFER ADDRESS (LOW)
ICBAHZ =$25 ; " " (HIGH)
ICPTLZ =$26 ;PUT BYTE ROUTINE ADDRESS - 1
ICPTHZ =$27
ICBLLZ =$28 ;BUFFER LENGTH (LOW)
ICBLHZ =$29 ; " " (HIGH)
ICAX1Z =$2A ;AUX INFO
ICAX2Z =$2B
ICSPRZ =$2C ;SPARE BYTES (CIO LOCAL USE)
ICIDNO =ICSPRZ+2 ;IOCB LUMBER * 16
CIOCHR =ICSPRZ+3 ;CHARACTER BYTE FOR CURRENT OPERATION
STATUS =$30 ;INTERNAL STATUS STORAGE
CHKSUM =$31 ;CHECKSUM (SINGLE BYTE SUM WITH CARRY)
BUNRLO =$32 ;POINTER TO DATA BUFFER (LO BYTE)
BUFRHI =$33 ;POINTER TO DATA BUFFER (HI BYTE)
BFENLO =$34 ;NEXT BYTE PAST END OF BUFFER (LO BYTE)
BNENHI =$35 ;NEXT BYTE PAST END OF BUFFER (HI BYTE)
CRETRY =$36 ;NUMBER OF COMMAND FRAM RETRIES
DRETRY =$370x19 ;NUMBER OF DEVICE RETRIES
BUFRFL =$38 ;DATA BUFFER FULL FLAG
RECVDN =$39 ;RECEIVE DONE FLAG
XMTDON =$3A ;XMIT DONE FLAG
CHKSNT =$3B ;CHECKSUM SENT FLAG
NOCKSM =$3C ;NO CHECKSUM FOLLOWS DATA FLAG
BPTR =$3D ;BUFFER POINTER (CASSETTE)
FTYPE =$3E ;FILE TYPE (SHORT IRG/LONG IRG)
FEOF =$3F ;END OF FILE FLAG (CASSETTE)
FREQ =$40 ;FREQ COUNTER FOR CONSOLE SPEAKER
SOUNDR =$41 ;NOISY I/O FLAG. (ZERO IS QUIET)
CRITIC =$42 ;CRITICAL CODE IF NON-ZERO)
FMSZPG =$43 ;DISK FILE MANAGER SYSTEM STORAGE (7 BYTES)
CKEY =$4A ;SET WHEN GAME START PRESSED
CASSBT =$4B ;CASSETTE BOOT FLAG
DSTAT =$4C ;DISPLAY STATUS
ATRACT =$4D ;ATTRACT MODE FLAG
DRKMSK =$4E ;DARK ATTRACT MASK
COLRSH =$4F ;ATTRACT COLOR SHIFTER (XOR'D WITH PLAYFIELD)
TMPCHR =$50 ;TEMP CHAR STORAGE (DISPLAY HANDLER)
HOLD1 =$51 ;TEMP STG (DISPLAY HANDLER)
LMARGN =$52 ;LEFT MARGIN
RMARGN =$53 ;RIGHT MARGIN
ROWCRS =$54 ;CURSOR COUNTERS
COLCRS =$55
DINDEX =$57 ;DISPLAY INDEX (VARIOUS QUANTS)
SAVMSC =$58
OLDROW =$5A ;PREVIOUS ROW/COL
OLDCOL =$5B
OLDCHR =$5D ;DATA UNDER CURSOR
OLDADR =$5E
NEWROW =$60 ;POINT DRAWS TO HERE
NEWCOL =$61
LOGCOL =$63 ;POINTS AT COLUMN IN LOGICAL LINE
ADRESS =$64 ;INDIRECT POINTER
MLTTMP =$66 ;MULTIPLY TEMP
OPNTMP =MLTTMP ;FIRST BYTE IS USED IN OPEN AS TEMP
SAVADR =$68
RAMTOP =$6A ;RAM SIZE DEFINED BY POWER ON LOGIC
BUFCNT =$6B ;BUFFER COUNT
BUFSTR =$6C ;EDITOR GETCH POINTER
BITMSK =$6E ;BIT MASK
SHFAMT =$6F ;OUTCHR SHIFT
ROWAC =$70 ;USED BY "DRAW"
COLAC =$72
ENDPT =$74
DELTAR =$76
DELTAC =$77
ROWINC =$79
COLINC =$7A
SWPFLG =$7B ;NON-0 IF TXT AND RAM SWAPPED
HOLDCH =$7C ;CH BEFORE CNTL & SHFT PROCESSING IN KGETCH
INSDAT =$7D ;INSERT CHAR SAVE
COUNTR =$7E ;DRAW COUNTER
;;; $80 TO $FF ARE RESERVED FOR USER APPLICATIONS
; PAGE 2 LOCATIONS
INTABS =$200 ;INTERRUPT TABLE
VDSLST =$200 ;DISPLAY LIST NMI VECTOR
VPRCED =$202 ;PROCEED LINE IRQ VECTOR
VINTER =$204 ;INTERRUPT LINE IRQ VECTOR
VBREAK =$206 ;"BRK" VECTOR
VKEYBD =$208 ;POKEY KEYBOARD IRQ VECTOR
VSERIN =$20A ;POKEY SERIAL INPUT READY
VSEROR =$20C ;POKEY SERIAL OUTPUT READY
VSEROC =$20E ;POKEY SERIAL OUTPUT DONE
VTIMR1 =$210 ;POKEY TIMER 1 IRQ
VTIMR2 =$212 ;POKEY TIMER 2 IRQ
VTIMR4 =$214 ;POKEY TIMER 4 IRQ (DO NOT USE)
VIMIRQ =$216 ;IMMEDIATE IRQ VECTOR
CDTMV1 =$218 ;COUNT DOWN TIMER 1
CDTMV1 =$21A ;COUNT DOWN TIMER 2
CDTMV1 =$21C ;COUNT DOWN TIMER 3
CDTMV1 =$21E ;COUNT DOWN TIMER 4
CDTMV1 =$220 ;COUNT DOWN TIMER 5
VVBLKI =$222 ;IMMEDIATE VERTICAL BLANK NMI VECTOR
VVBLKD =$224 ;DEFERRED VERTICAL BLANK NMI VECTOR
CDTMA1 =$226 ;COUNT DOWN TIMER 1 JSR ADDRESS
CDTMA2 =$228 ;COUNT DOWN TIMER 2 JSR ADDRESS
CDTMF3 =$22A ;COUNT DOWN TIMER 3 FLAG
SRTIMR =$22B ;SOFTWARE REPEAT TIMER
CDTMF4 =$22C ;COUNT DOWN TIMER 4 FLAG
INTEMP =$22D ;IAN'S TEMP (???)
CDTMF5 =$22E ;COUNT DOWN TIMER 5 FLAG
SDMCTL =$22F ;SAVE DMACTL REGISTER
SDLSTL =$230 ;SAVE DISPLAY LIST (LOW)
SDLSTH =$231 ;SAVE DISPLAY LIST (HIGH)
SSKCTL =$232 ;SKCTL REGISTER RAM
LPENH =$234 ;LIGHT PEN HORIZ VALUE
LPENV =$235 ;LIGHT PEN VERT VALUE
; ($236 - $239 SPARE)
CDEVIC =$23A ;COMMAND FRAME BUFFER - DEVICE
CCOMND =$23B ;COMMAND
CAUX1 =$23C ;COMMAND AUX BYTE 1
CAUX2 =$23D ;COMMAND AUX BYTE 2
TEMP =$23E ;YES
ERRFLG =$23F ;ERROR FLAG - ANY DEVICE ERROR EXCEPT TIMEOUT
DFLAGS =$240 ;DISK FLAGS FROM SECTOR ONE
DBSECT =$241 ;NUMBER OF DISK BOOT SECTORS
BOOTAD =$242 ;ADDRESS FOR DISK BOOT LOADER
COLDST =$244 ;COLDSTART FLAG (1 = DOING COLDSTART)
;($245 SPARE)
DSKTIM =$246 ;DISK TIME OUT REG
LINBUF =$247 ;CHAR LINE BUFFER (40 BYTES)
GPRIOR =$26F ;GLOBAL PRIORITY CELL
PADDL0 =$270 ;POT 0 SHADOW
PADDL1 =$271 ;POT 1 SHADOW
PADDL2 =$272 ;POT 2 SHADOW
PADDL3 =$273 ;POT 3 SHADOW
PADDL4 =$274 ;POT 4 SHADOW
PADDL5 =$275 ;POT 5 SHADOW
PADDL6 =$276 ;POT 6 SHADOW
PADDL7 =$277 ;POT 7 SHADOW
STICK0 =$278 ;JOYSTICK 0 SHADOW
STICK1 =$279 ;JOYSTICK 1 SHADOW
STICK2 =$27A ;JOYSTICK 2 SHADOW
STICK3 =$27B ;JOYSTICK 3 SHADOW
PTRIG0 =$27C ;PADDLE 0 TRIGGER
PTRIG1 =$27D ;PADDLE 1 TRIGGER
PTRIG2 =$27E ;PADDLE 2 TRIGGER
PTRIG3 =$27F ;PADDLE 3 TRIGGER
PTRIG4 =$280 ;PADDLE 4 TRIGGER
PTRIG5 =$281 ;PADDLE 5 TRIGGER
PTRIG6 =$282 ;PADDLE 6 TRIGGER
PTRIG7 =$283 ;PADDLE 7 TRIGGER
STRIG0 =$284 ;JOYSTICK 0 TRIGGER
STRIG1 =$285 ;JOYSTICK 1 TRIGGER
STRIG2 =$286 ;JOYSTICK 2 TRIGGER
STRIG3 =$287 ;JOYSTICK 3 TRIGGER
CSTAT =$288 ;(UNUSED)
WMODE =$289 ;R/W FLAG FOR CASSETTE
BLIM =$28A ;BUFFER LIMIT (CASSETTE)
;($28B - $28F SPARE)
TXTROW =$290 ;TEXT ROWCRS
TXTCOL =$291 ;TEXT ROWCOL
TINDEX =$293 ;TEXT INDEX
TXTMSC =$294 ;FOOLS CONVRT INTO NEW MSC
TXTOLD =$296 ;OLDROW & OLDCOL FOR TEXT (AND THEN SOME)
TMPX1 =$29C
HOLD3 =$29D
SUBTMP =$29E
HOLD2 =$29F
DMASK =$2A0
TMPLBT =$2A1
ESCFLG =$2A2 ;ESCAPE FLAG
TABMAP =$2A3 ;TAB BUFFER
LOGMAP =$2B2 ;LOGICAL LINE START BIT MAP
INVFLG =$2B6 ;INVERSE VIDEO FLAG (ATARI KEY)
FILFLG =$2B7 ;RIGHT FILL FLAG FOR DRAW
TMPROW =$2B8
TMPCOL =$2B9
SCRFLG =$2BB ;SET IF SCROLL OCCURS
HOLD4 =$2BC ;MORE DRAW TEMPS
HOLD5 =$2BD
SHFLOK =$2BE ;SHIFT LOCK KEY
BOTSCR =$2BF ;BOTTOM OF SCREEN (24 NORM, 4 SPLIT)
PCOLR0 =$2C0 ;P0 COLOR
PCOLR1 =$2C1 ;P1 COLOR
PCOLR2 =$2C2 ;P2 COLOR
PCOLR3 =$2C3 ;P3 COLOR
COLOR0 =$2C4 ;COLOR 0
COLOR1 =$2C5
COLOR2 =$2C6
COLOR3 =$2C7
COLOR4 =$2C8 ;BACKGROUND
;($2C9 - $2DF SPARE)
GLBABS =$2E0 ;GLOBAL VARIABLES
;($2E0 - $2E3 SPARE)
RAMSIZ =$2E4 ;RAM SIZE (HI BYTE ONLY)
MEMTOP =$2E5 ;TOP OF AVAILABLE MEMORY
MEMLO =$2E7 ;BOTTOM OF AVAILABLE MEMORY
;($2E9 SPARE)
DVSTAT =$2EA ;STATUS BUFFER
CBAUDL =$2EE ;CASSETTE BAUD RATE (LO BYTE)
CBAUDH =$2EF ; " " " (HI BYTE)
CRSINH =$2F0 ;CURSOR INHIBIT (00 = CURSOR ON)
KEYDEL =$2F1 ;KEY DELAY
CH1 =$2F2
CHACT =$2F3 ;CHACTL REGISTER (SHADOW)
CHBAS =$2F4 ;CHBAS REGISTER (SHADOW)
;($2F5 - $2F9 SPARE)
CHAR =$2FA
ATACHR =$2FB ;ATASCII CHARACTER
CH =$2FC ;GLOBAL VARIABLE FOR KEYBOARD
FILDAT =$2FD ;RIGHT FILL DATA (DRAW)
DSPFLG =$2FE ;DISPLAY FLAG: DISP CONTROLS IF NON-ZERO
SSFLAG =$2FF ;START/STOP FLAG (CNTL-1) FOR PAGING
; PAGE 3 LOCATIONS
DCB =$300 ;DEVICE CONTROL BLOCK
DDEVIC =$300 ;BUS I.D. NUMBER
DUNIT =$301 ;UNIT NUMBER
DCOMND =$302 ;BUS COMMAND
DSTATS =$303 ;COMMAND TYPE/STATUS RETURN
DBUFLO =$304 ;DATA BUFFER POINTER
DBUFHI =$305 ; ...
DTIMLO =$306 ;DEVICE TIME OUT IN 1 SEC. UNITS
DUNUSE =$307 ;UNUSED
DBYTLO =$308 ;BYTE COUNT
DBYTHI =$309 ; ...
DAUX1 =$30A ;COMMAND AUXILLARY BYTES
DAUX2 =$30B ; ...
TIMER1 =$30C ;INITIAL TIMER VALUE
ADDCOR =$30E ;ADDITION CORRECTION
CASFLG =$30F ;CASSETTE MODE WHEN SET
TIMER2 =$310 ;FINAL TIME VALUE (USED TO COMPUTE BAUD RATE)
TEMP1 =$312 ;TEMP LOCATIONS
TEMP2 =$314 ; ...
TEMP3 =$315 ; ...
SAVIO =$316 ;SAVE SERIAL IN DATA PORT
TIMFLG =$317 ;TIME OUT FLAG FOR BAUD RATE CORRECTION
STACKP =$318 ;SIO STACK POINTER SAVE LOC
TSTAT =$319 ;TEMP STATUS LOC
HATABS =$31A ;HANDLER ADDRESS TABLE
MAXDEV =$21 ;MAXIMUM HANDLER ADDRESS INDEX
; IOCB OFFSETS
IOCB =$340 ;I/O CONTROL BLOCKS
ICHID =$340 ;HANDLER INDEX ($FF = FREE)
ICDNO =$341 ;DEVICE NUMBER (DRIVE NUMBER)
ICCOM =$342 ;COMMAND CODE
ICSTA =$343 ;STATUS
ICBAL =$344 ;BUFFER ADDRESS
ICBAH =$345 ; ...
ICPTL =$346 ;PUT BYTE ROUTINE ADDRESS - 1
ICPTH =$347 ; ...
ICBLL =$348 ;BUFFER LENGTH
ICBLH =$349 ; ...
ICAX1 =$34A ;AUXILLARY INFO
ICAX2 =$34B ; ...
ICSPR =$34C ;4 SPARE BYTES
PRNBUF =$3C0 ;PRINTER BUFFER
;($3EA - $3FC SPARE)
; PAGE 4 LOCATIONS
CASBUF =$3FD ;CASSETTE BUFFER
; USER AREA STARTS HERE AND GOES TO THE END OF PAGE 5
USAREA =$480
;ATASCII CHARACTER DEFS
.ATCLR =$7D ;CLEAR SCREEN CHARACTER
.ATRUB =$7E ;BACK SPACE (RUBOUT)
.ATTAB =$7F ;TAB
.ATEOL =$9B ;END-OF-LINE
.ATBEL =$FD ;CONSOLE BELL
.ATURW =$1C ;UP-ARROW
.ATDRW =$1D ;DOWN-ARROW
.ATLRW =$1E ;LEFT-ARROW
.ATRRW =$1F ;RIGHT-ARROW
; USEFUL VALUES
LEDGE =2 ;LMARGN'S INITIAL VALUE
REDGE =39 ;RMARGN'S INITIAL VALUE
ZPC =0 ;PC CODE FOR ZERO PAGE PC
P6PC =1 ;PC CODE FOR PAGE 6
PPC =2 ;PC CODE FOR PROGRAM MEMORY
;INIT PC VALUES
CURPC =0
PC0 =0 ;PAGE ZERO
PC1 =$600 ;PAGE 6 PC
PC2 =$3800 ;PROGRAM PC
.MACRO PCBRK
.PRINT PC0 ;PAGE ZERO BREAK
.PRINT PC1 ;PAGE 6 BREAK
.PRINT PC2 ;PROGRAM BREAK
.ENDM
.ENDM ;; ATARI
0xC; ***** KIM SYSTEM DEFS *****
.MACRO KIMDEF
;LOCATIONS IN 6530-002 I/O
KSAD =$1740 ;PORT A DATA
KPADD =$1741 ;PORT A DATA DIRECTION
KSBD =$1742 ;PORT B DATA
KSBDD =$1743 ;PORT B DATA DIRECTION
KC1T =$1744 ;CLOCK /1
KC8T =$1745 ;CLOCK /8
KC64T =$1746 ;CLOCK /64
KCKT =$1747 ;CLOCK /1024
;LOCATIONS IN 6530-003 I/O
PAD =$1700 ;PORT A DATA
PADD =$1701 ;PORT A DATA DIRECTION
PBD =$1702 ;PORT B DATA
PBDD =$1703 ;PORT B DATA DIRECTION
CLK1T =$1704 ;CLOCK /1
CLK8T =$1705 ;CLOCK /8
CLK64T =$1706 ;CLOCK /64
CLKKT =$1707 ;CLOCK /1024
IC1T =$170C ;CLOCK /1 INTS ENABLED
IC8T =$170D ;CLOCK /8 "
IC64T =$170E ;CLOCK /64 "
ICKT =$170F ;CLOCK /1024 "
KRAM =$1780 ;SCRATCH PAD RAM
KRAMX =$17FF ;KRAM END
0xC;PAGE ZERO VARIABLES USED BY KIM MONITOR
PCL =$EF ;PROGRAM COUNTER
PCH =$F0
PS =$F1 ;PROCESSOR STATUS REG
SP =$F2 ;STACK POINTER
AC =$F3 ;ACCUMULATOR
YREG =$F4 ;Y INDEX
XREG =$F5 ;X INDEX
CHKSUM =$F6 ;CHECKSUM TEMP (2 BYTES)
INBUF =$F8 ;INPUT BUFFER (2 BYTES)
POINT =$FA ;OPEN CELL ADDRS (2 BYTES)
TEMP =$FC ;TEMPORARY
TMPX =$FD ;TEMPORARY X SAVE
CHAR =$FE ;INPUT CHARACTER
MODE =$FF ;ADDRS/DATA FLAG FOR DPY
;PAGE 23 VARIABLES USED BY KIM MONITOR
CHKL =$17E7 ;ANOTHER CHECKSUM
CHKH =$17E8
SAVX =$17E9 ;3 BYTE SCRATCH AREA
VEB =$17EC ;6 BYTE PROGRAM FOR CASETTE CODE
CNTL =$17F2 ;TTY DELAY COUNT
CNTH =$17F3
TIMH =$17F4 ;TEMP FOR TTY TIMING
SAL =$17F5 ;START ADDRS FOR CASETTE
SAH =$17F6
EAL =$17F7 ;END ADDRS FOR CASSETE
EAH =$17F8
CID =$17F9 ;FILE ID FOR CASETTE
;INTERUPT VECTORS
NMIV =$17FA ;NMI VECTOR (STOP := $1C00)
RSTV =$17FC ;RESET VECTOR
IRQV =$17FE ;IRQ VECTOR (BRK := $1C00)
0xC;VARIOUS HANDY ROUTINE LOCATIONS IN KIM MONITOR
SAVE =$1C00 ;KIM ENTRY TO SAVE WORLD FIRST
SAVER =$1C05 ;KIM ENTRY VIA JSR (A LOST)
RESET =$1C22 ;KIM RESET ENTRY
KIM =$1C4F ;KIM START ADDRS
GOEXEC =$1DC8 ;RESTORE MACHINE AND RETURN
PRTPNT =$1E1E ;ROUTINE TO PRINT "POINT" (CALLS CHK)
CRLF =$1E2F ;PRINT CRLF
PRTBYT =$1E3B ;PRINT 1 HEX BYTE AS 2 ASCII CHARS
;A PRESERVED
HEXTA =$1E4C ;PRINT 1 ASCII HEX DIGIT (4 BITS)
GETCH =$1E5A ;GET CHARACTER (PRESERVES X)
INITS =$1E88 ;INITIALIZATION
OUTSP =$1E9E ;PRINT A SPACE
OUTCH =$1EA0 ;PRINT CHARACTER IN A
AK =$1EFE ;KEYBOARD ROUTINE
SCANDS =$1F1F ;DISPLAY F9-FB
INCPT =$1F63 ;INCREMENT "POINT"
GETKEY =$1F6A ;GET KEY FROM KEYBOARD
CHK =$1F91 ;CHECKSUM ROUTINE (COMPUTES "CHKSUM")
GETBYT =$1F9D ;GET 2 ASCII CHARS INTO HEX BYTE
;X PRESERVED
PACK =$1FAC ;PACK CHAR INTO INPUT BUFFER
;RETURNS A=0 IF HEX CHAR
OPEN =$1FCC ;COPIES INBUF TO POINT
DPYTAB =$1FE7 ;HEX TO 7 SEGMENT TABLE
;ROUTINES IN CASSETTE DRIVER
CHKT =$194C ;COMPUTE CHKSUM FOR TAPE
INTVEB =$1932 ;INIT VEB WITH SAL,SAH / CLEAR CHKSUM
INCVEB =$19EA ;INCREMENT VEB+1,2
RDBYT =$19F3 ;READ BYTE FROM TAPE
PACKT =$1A00 ;PACK ASCII INTO SAVX
RDCHT =$1A24 ;GET 1 CHAR FROM TAPE
RDBIT =$1A41 ;GET 1 BIT FROM TAPE IN SIGN OF A
DUMPT =$1800 ;DUMP MEM TO TAPE
LOADT =$1873 ;LOAD MEM FROM TAPE
ZPC =0 ;PC CODE FOR ZERO PAGE PC
PPC =1 ;PC CODE FOR PROGRAM PC
KPC =2 ;PC CODE FOR KRAM PC
XPC =3 ;PC CODE FOR LOW 1K
;INIT PC VALUES
CURPC =0
PC0 =0 ;PAGE ZERO
PC1 =$200 ;PROGRAM PC
PC2 =KRAM ;KRAM PC
PC3 =$200 ;PC FOR LOW 1K
.MACR PCBRK
.PRINT PC0 ;PAGE ZERO BREAK
.PRINT PC1 ;PROGRAM BREAK
.PRINT PC2 ;KRAM BREAK
.PRINT PC3 ;LOW 1K BREAK
.ENDM
.ENDM ;;KIMDEF
0xC;GENERAL 6502 DEFS
.MACRO M6502
;ASCII CHARACTER DEFS
.CHNUL =@00 ;NULL
.CHSOH =@01 ;SOH
.CHSTX =@02
.CHETX =@03
.CHEOT =@04
.CHENQ =@05
.CHACK =@06
.CHBEL =@07
.CHBS =@10
.CHTAB =@11
.CHLF =@12
.CHVT =@13
.CHFF =@14
.CHCR =@15
.CHSO =@16
.CHSI =@17
.CHDLE =@20
.CHDC1 =@21
.CHDC2 =@22
.CHDC3 =@23
.CHDC4 =@24
.CHNAK =@25
.CHSYN =@26
.CHETB =@27
.CHCAN =@30
.CHEM =@31
.CHSUB =@32
.CHESC =@33
.CHFS =@34
.CHGS =@35
.CHRS =@36
.CHUS =@37
.CHSP =@40
.CHRUB =@177
0xC;HANDY MACROS
.EQUIV SEI,PIOFF ;TURN OFF IRQ INTS
.EQUIV CLI,PION ;ALLOW IRQ INTS
.EQUIV JSR,CALL ;SUBROUTINE CALL
.EQUIV RTS,RET ;SUBROUTINE RETURN
;DOUBLE BYTE HANDLING MACROS
.MACR MOV2 FROM,TO,INDX ;;COPY 2 BYTE ITEM
LDA FROM ;;GET FIRST BYTE
.IIF B,<INDX>,STA TO
.IIF NB,<INDX>,STA TO,INDX
LDA FROM+1 ;;THEN LAST
.IIF B,<INDX>,STA TO+1
.IIF NB,<INDX>,STA TO+1,INDX
.ENDM
.MACR INC2 LOC,?MEXIT ;;INCREMENT LOCATION
INC LOC ;;LOW BYTE FIRST
BNE MEXIT ;;EXIT IF NO CARRY
INC LOC+1 ;;ELSE INCR HIGH BYTE
MEXIT:
.ENDM
.MACR DEC2 LOC,?MEXIT ;;DECREMENT LOCATION
SEC
LDA LOC ;;GET LOW BYTE
SBC #1 ;;DEC DOESNT AFFECT CARRY
STA LOC
BCS MEXIT ;;EXIT IF NO BORROW
DEC LOC+1 ;;ELSE ADJUST HIGH BYTE
MEXIT:
.ENDM
.MACR CMP2EQ A,B,TARGET,?NOMAT
LDA A+1
CMP B+1 ;;CHECK FOR MATCH
BNE NOMAT ;;QUICK FINISH
LDA A
CMP B
BEQ TARGET ;;IF .EQ. JUMP TO TARGET
NOMAT: ;;FALL THROUGH IF NO MATCH
.ENDM
0xC.MACR CMP2NE A,B,TARGET ;;OPOSITE OF CMP2EQ
LDA A+1
CMP B+1
BNE TARGET ;;NO MATCH
LDA A+1
CMP B
BNE TARGET ;;NOT SAME
;;FALL THROUGH IF SAME
.ENDM
.MACR SET2 VALUE,LOC,INDX ;;SET 2 BYTE IMMEDIATE
LDA #<VALUE>&$FF ;;LOW BYTE
.IIF B,<INDX>,STA LOC
.IIF NB,<INDX>,STA LOC,INDX
LDA #<VALUE>^ ;;HIGH BYTE
.IIF B,<INDX>,STA LOC+1
.IIF NB,<INDX>,STA LOC+1,INDX
.ENDM
.MACR SETAX VALUE ;; LOAD A&X WITH 16-BIT VALUE
LDA #<VALUE>&$FF ;; LOW BYTE
LDX #<VALUE>^
.ENDM
.MACR SETXA VALUE ;; LOAD X&A WITH 16-BIT VALUE
LDX #<VALUE>&$FF ;; LOW BYTE
LDA #<VALUE>^
.ENDM
.MACR SETXY VALUE ;; LOAD X&Y WITH 16-BIT VALUE
LDX #<VALUE>&$FF ;; LOW BYTE
LDY #<VALUE>^
.ENDM
.MACR MOV2X FROM,TO ;;COPY 2 BYTE ITEM
LDX FROM ;;GET FIRST BYTE
STX TO
LDX FROM+1 ;;THEN LAST
STX TO+1
.ENDM
.MACR SET2X VALUE,LOC ;;SET 2 BYTE IMMEDIATE
LDX #<VALUE&$FF> ;;LOW BYTE
STX LOC
LDX #<VALUE>^ ;;HIGH BYTE
STX LOC+1
.ENDM
.MACR CLR LST ;;CLEAR LOCATIONS
LDA #0
.IRP LOC,<LST>
STA LOC
.ENDR
.ENDM
.MACR CLR2 LST ;;CLEAR FOR 2 BYTE THINGS
LDA #0
.IRP LOC,<LST>
STA LOC
STA LOC+1
.ENDR
.ENDM
0xC;MACROS TO MANIPULATE PCS
.MACR SETPC NAM,VAL
SAVPC \CURPC
.=VAL
CURPC=NAM
.ENDM
.MACR USEPC NAM
SWPPC \CURPC,\NAM
CURPC=NAM
.ENDM
.MACR SAVPC NAM
PC'NAM=.
.ENDM
.MACR SWPPC OLD,NEW
PC'OLD=.
.=PC'NEW
.ENDM
;FANCY END MACRO
.MACR END ARG
SAVPC \CURPC
.IF P2
PCBRK
.ENDC
.END ARG
.ENDM
0xC;UTILITY MACROS
.MACR TYPE MSGAD
LDX #MSGAD&$FF
LDY #MSGAD^
CALL PUTLIN
.ENDM
.MOD. =$FFFF ;MODIFIED LOC (REMOVE FOR ROM)
.ENDM ;; M6502
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