ml-plat-vic20.txt

; CBMXfer Disassembler, Platform File
; For VIC-20
;--------------------------------------------------------------------------
; Created using C64 platform then correcting the chips
;--------------------------------------------------------------------------
0000,USRJMP ,Jump Vector: USR() command - JMP$D248
0003,ADRAY1 ,Jump Vector: Convert FAC to Integer in (
0005,ADRAY2 ,Jump Vector: Convert Integer in (A/Y) to
0007,CHARAC ,Search Character/Temporary Integer durin
0007,INTEGR ,Temporary Integer during OR/AND.
0008,ENDCHR ,Flag: Scan for Quote at end of String.
0009,TRMPOS ,Screen Column for last TAB.
000A,VERCK  ,Flag: 0=Load; 1=Verify.
000B,COUNT  ,Input Buffer Pointer/Number of Subscript
000C,DIMFLG ,Flag: Default Array dimension.
000D,VALTYP ,Data type Flag: $00=Numeric; $FF=String.
000E,INTFLG ,Data type Flag: $00=Floating point $80=I
000F,GARBFL ,Flag: DATA scan/List Quote/Garbage colle
0010,SUBFLG ,Flag: Subscript reference/User Function 
0011,INPFLG ,Input Flag: $00=INPUT; $40=GET $98 =READ
0012,TANSGN ,Flag: TAN sign/Comparative result.
0013,CHANNL ,File number of current Input Device.
0014,LINNUM ,Temporary: Integer value.
0016,TEMPPT ,Pointer: Temporary String Stack.
0017,LASTPT ,Last temporary String Address.
0019,TEMPST ,Stack for temporary Strings.
0022,INDEX  ,Utility Pointer Area.
0022,INDEX1 ,First Utility Pointer.
0024,INDEX2 ,Second Utility Pointer.
0026,RESHO  ,Floating point product of Multiply and D
002B,TXTTAB ,Pointer: Start of BASIC Text Area ($0801
002D,VARTAB ,Pointer: Start of BASIC Variables.
002F,ARYTAB ,Pointer: Start of BASIC Arrays.
0031,STREND ,Pointer: End of BASIC Arrays + 1.
0033,FRETOP ,Pointer: Bottom of String space.
0035,FRESPC ,Utility String Pointer.
0037,MEMSIZ ,Pointer: Highest Address available to BA
0039,CURLIN ,Current BASIC Line number.
003B,OLDLIN ,Previous BASIC Line number.
003D,OLDTXT ,Pointer: BASIC Statement for CONT.
003F,DATLIN ,Current DATA Line number.
0041,DATPTR ,Pointer: Used by READ - current DATA Ite
0043,INPPTR ,Pointer: Temporary storage of Pointer du
0045,VARNAM ,Name of Variable being sought in Variabl
0047,VARPNT ,Pointer: to value of (VARNAM) if Integer
0049,FORPNT ,Pointer: Index Variable for FOR/NEXT loo
004B,VARTXT ,Temporary storage for TXTPTR during READ
004D,OPMASK ,Mask used during FRMEVL.
004E,TEMPF3 ,Temporary storage for FLPT value.
0053,FOUR6  ,Length of String Variable during Garbage
0054,JMPER  ,Jump Vector used in Function Evaluation 
0057,TEMPF1 ,Temporary storage for FLPT value.
005C,TEMPF2 ,Temporary storage for FLPT value.
0061,FAC    ,Main Floating point Accumulator.
0061,FACEXP ,FAC Exponent.
0062,FACHO  ,FAC Mantissa.
0066,FACSGN ,FAC Sign.
0067,SGNFLG ,Pointer: Series Evaluation Constant.
0068,BITS   ,Bit Overflow Area during normalisation R
0069,AFAC   ,Auxiliary Floating point Accumulator.
0069,ARGEXP ,AFAC Exponent.
006A,ARGHO  ,AFAC Mantissa.
006E,ARGSGN ,AFAC Sign.
006F,ARISGN ,Sign of result of Arithmetic Evaluation.
0070,FACOV  ,FAC low-order rounding.
0071,FBUFPT ,Pointer: Used during CRUNCH/ASCII conver
0073,CHRGET ,Subroutine: Get next Byte of BASIC Text.
0079,CHRGOT ,Entry to Get same Byte again.
007A,TXTPTR ,Pointer: Current Byte of BASIC Text.
008B,RNDX  ,Floating RND Function Seed Value.
0090,STATUS ,Kernal I/O Status Word ST.
0091,STKEY  ,Flag: $7F=STOP key.
0092,SVXT   ,Timing Constant for Tape.
0093,VERCKK ,Flag: 0=Load; 1=Verify.
0094,C3PO   ,Flag: Serial Bus - Output Character buff
0095,BSOUR  ,Buffered Character for Serial Bus.
0096,SYNO   ,Cassette Sync. number.
0097,TEMPX  ,Temporary storage of X Register during C
0097,TEMPY  ,Temporary storage of Y Register during R
0098,LDTND  ,Number of Open Files/Index to File Table
0099,DFLTN  ,Default Input Device (0).
009A,DFLTO  ,Default Output Device (3).
009B,PRTY   ,Parity of Byte Output to Tape.
009C,DPSW   ,Flag: Byte received from Tape.
009D,MSGFLG ,Flag: $00=Prog mode: Suppress Err Msgs; 
009E,FNMIDX ,Index to Cassette File name/Header ID fo
009E,PTR1   ,Tape Error log pass 1.
009F,PTR2   ,Tape Error log pass 2.
00A0,TIME   ,Real-time jiffy Clock (Updated by IRQ In
00A3,TSFCNT ,Bit Counter Tape Read or Write/Serial Bu
00A4,TBTCNT ,Pulse Counter Tape Read or Write/Serial 
00A5,CNTDN  ,Tape Synchronising count down.
00A6,BUFPNT ,Pointer: Tape I/O buffer.
00A7,INBIT  ,RS232 temporary for received Bit/Tape te
00A8,BITC1  ,RS232 Input Bit count/Tape temporary.
00A9,RINONE ,RS232 Flag: Start Bit check/Tape tempora
00AA,RIDATA ,RS232 Input Byte Buffer/Tape temporary.
00AB,RIPRTY ,RS232 Input parity/Tape temporary.
00AC,SAL    ,Pointer: Tape Buffer/Screen scrolling.
00AE,EAL    ,Tape End Address/End of Program.
00B0,CMPO   ,Tape timing Constants.
00B2,TAPE1  ,Pointer: Start Address of Tape Buffer ($
00B4,BITTS  ,RS232 Write bit count/Tape Read timing F
00B5,NXTBIT ,RS232 Next Bit to send/Tape Read - End o
00B6,RODATA ,RS232 Output Byte Buffer/Tape Read Error
00B7,FNLEN  ,Number of Characters in Filename.
00B8,LA     ,Current File - Logical File number.
00B9,SA     ,Current File - Secondary Address.
00BA,FA     ,Current File - First Address (Device num
00BB,FNADR  ,Pointer: Current File name Address.
00BD,ROPRTY ,RS232 Output Parity/Tape Byte to be Inpu
00BE,FSBLK  ,Tape Input/Output Block count.
00BF,MYCH   ,Serial Word Buffer.
00C0,CAS1   ,Tape Motor Switch.
00C1,STAL   ,Start Address for LOAD and Cassette Writ
00C3,MEMUSS ,Pointer: Type 3 Tape LOAD and general us
00C5,LSTX   ,Matrix value of last Key pressed; No Key
00C6,NDX    ,Number of Characters in Keyboard Buffer 
00C7,RVS    ,Flag: Reverse On/Off; On=$01; Off=$00.
00C8,INDX   ,Pointer: End of Line for Input (Used to 
00C9,LXSP   ,Cursor X/Y (Line/Column) position at sta
00CB,SFDX   ,Flag: Print shifted Characters.
00CC,BLNSW  ,Flag: Cursor blink; $00=Enabled; $01=Dis
00CD,BLNCT  ,Timer: Count down for Cursor blink toggl
00CE,GDBLN  ,Character under Cursor while Cursor Inve
00CF,BLNON  ,Flag: Cursor Status; $00=Off; $01=On.
00D0,CRSW   ,Flag: Input from Screen=$03; or Keyboard
00D1,PNT    ,Pointer: Current Screen Line Address.
00D3,PNTR   ,Cursor Column on current Line; including
00D4,QTSW   ,Flag: Editor in Quote Mode; $00=Not.
00D5,LNMX   ,Current logical Line length: 39 or 79.
00D6,TBLX   ,Current Screen Line number of Cursor.
00D7,SCHAR  ,Screen value of current Input Character/
00D8,INSRT  ,Count of number of inserts outstanding.
00D9,LDTB1  ,Screen Line link Table/Editor temporarie
00F3,USER   ,Pointer: Current Colour RAM Location.
00F5,KEYTAB ,Vector: Current Keyboard decoding Table.
00F7,RIBUF  ,RS232 Input Buffer Pointer.
00F9,ROBUF  ,RS232 Output Buffer Pointer.
00FB,FREKZP ,Free Zero Page space for User Programs.
00FF,ASCWRK ,Assembly Area for Floating point to ASCI
00FF,BASZPT ,BASIC temporary Data Area.
0100,BAD    ,Tape Input Error log.
0100,STACK  ,6510 Hardware Stack Area.
013F,BSTACK ,BASIC Stack Area.
0200,BUF    ,BASIC Input Buffer (Input Line from Scre
0259,LAT    ,Kernal Table: Active logical File number
0263,FAT    ,Kernal Table: Active File First Addresse
026D,SAT    ,Kernal Table: Active File Secondary Addr
0277,KEYD   ,Keyboard Buffer Queue (FIFO).
0281,MEMSTR ,Pointer: Bottom of Memory for Operating 
0283,MEMSIZ ,Pointer: Top of Memory for Operating Sys
0285,TIMOUT ,Serial IEEE Bus timeout defeat Flag.
0286,COLOR  ,Current Character Colour code.
0287,GDCOL  ,Background Colour under Cursor.
0288,HIBASE ,High Byte of Screen Memory Address ($04)
0289,XMAX   ,Maximum number of Bytes in Keyboard Buff
028A,RPTFLG ,Flag: Repeat keys; $00=Cursors; INST/DEL
028B,KOUNT  ,Repeat Key: Speed Counter ($04).
028C,DELAY  ,Repeat Key: First repeat delay Counter (
028D,SHFLAG ,Flag: Shift Keys: Bit 1=Shift; Bit 2=CBM
028E,LSTSHF ,Last Shift Key used for debouncing.
028F,KEYLOG ,Vector: Routine to determine Keyboard ta
0291,MODE   ,Flag: Upper/Lower Case change: $00=Disab
0292,AUTODN ,Flag: Auto scroll down: $00=Disabled ($0
0293,M51CTR ,RS232 Pseudo 6551 control Register Image
0294,M51CDR ,RS232 Pseudo 6551 command Register Image
0295,M51AJB ,RS232 Non-standard Bits/Second.
0297,RSSTAT ,RS232 Pseudo 6551 Status Register Image.
0298,BITNUM ,RS232 Number of Bits left to send.
0299,BAUDOF ,RS232 Baud Rate; Full Bit time microseco
029B,RIDBE  ,RS232 Index to End of Input Buffer.
029C,RIDBS  ,RS232 Pointer: High Byte of Address of I
029D,RODBS  ,RS232 Pointer: High Byte of Address of O
029E,RODBE  ,RS232 Index to End of Output Buffer.
029F,IRQTMP ,Temporary store for IRQ Vector during Ta
02A1,ENABL  ,RS232 Enables.
02A2,TODSNS ,TOD sense during Tape I/O.
02A3,TRDTMP ,Temporary storage during Tape READ.
02A4,TD1IRQ ,Temporary D1IRQ Indicator during Tape RE
02A5,TLNIDX ,Temporary for Line Index.
02A6,TVSFLG ,Flag: TV Standard: $00=NTSC; $01=PAL.
02A7,TEMP2  ,Unused.
02C0,SPR11  ,Sprite #11 Data Area.
0300,IERROR ,Vector: Indirect entry to BASIC Error
0302,IMAIN  ,Vector: Indirect entry to BASIC Input Li
0304,ICRNCH ,Vector: Indirect entry to BASIC Tokenise
0306,IQPLOP ,Vector: Indirect entry to BASIC LIST Rou
0308,IGONE  ,Vector: Indirect entry to BASIC Characte
030A,IEVAL  ,Vector: Indirect entry to BASIC Token ev
030C,SAREG  ,Storage for 6510 Accumulator during SYS.
030D,SXREG  ,Storage for 6510 X-Register during SYS.
030E,SYREG  ,Storage for 6510 Y-Register during SYS.
030F,SPREG  ,Storage for 6510 Status Register during 
0310,USRPOK ,USR Function JMP Instruction ($4C).
0311,USRADD ,USR Address ($LB;$MB).
0313,TEMP3  ,Unused.
0314,CINV   ,Vector: Hardware IRQ Interrupt Address (
0316,CNBINV ,Vector: BRK Instruction Interrupt Addres
0318,NMINV  ,Vector: Hardware NMI Interrupt Address (
031A,IOPEN  ,Vector: Indirect entry to Kernal OPEN Ro
031C,ICLOSE ,Vector: Indirect entry to Kernal CLOSE R
031E,ICHKIN ,Vector: Indirect entry to Kernal CHKIN R
0320,ICKOUT ,Vector: Indirect entry to Kernal CHKOUT 
0322,ICLRCH ,Vector: Indirect entry to Kernal CLRCHN 
0324,IBASIN ,Vector: Indirect entry to Kernal CHRIN R
0326,IBSOUT ,Vector: Indirect entry to Kernal CHROUT 
0328,ISTOP  ,Vector: Indirect entry to Kernal STOP Ro
032A,IGETIN ,Vector: Indirect entry to Kernal GETIN R
032C,ICLALL ,Vector: Indirect entry to Kernal CLALL R
032E,USRCMD ,User Defined Vector ($FE66). 
0330,ILOAD  ,Vector: Indirect entry to Kernal LOAD Ro
0332,ISAVE  ,Vector: Indirect entry to Kernal SAVE Ro
0334,TEMP4  ,Unused.
033C,TBUFFR ,Tape I/O Buffer.
0340,SPR13  ,Sprite #13.
0380,SPR14  ,Sprite #14.
03C0,SPR15  ,Sprite #15.
03FC,TEMP5  ,Unused.
;---- Chips
9000,VICREG00,VIC; $9000 - left edge of picture & interlace switch
9001,VICREG01,VIC; $9001 - vertical picture origin
9002,VICREG02,VIC; $9002 - number of columns, part os screen map addr.
9003,VICREG03,VIC; $9003 - number of lines, part of raster location (bit 8)
9004,VICREG04,VIC; $9004 - raster beam location (bits 7-0)
9005,VICREG05,VIC; $9005 - screen map & character map address
9006,VICREG06,VIC; $9006 - light pen horizontal position
9007,VICREG07,VIC; $9007 - light pen vertical position
9008,VICREG08,VIC; $9008 - paddle X value
9009,VICREG09,VIC; $9009 - paddle Y value
900A,VICREG10,VIC; $900A - frequency of sound osc.1 (bass)
900B,VICREG11,VIC; $900B - frequency of sound osc.2 (alto)
900C,VICREG12,VIC; $900C - frequency of sound osc.3 (soprano)
900D,VICREG13,VIC; $900D - frequency of sound osc.4 (noise)
900E,VICREG14,VIC; $900E - sound volume
900F,VICREG15,VIC; $900F - screen colors: background, border & inverse
9110,VIA1REG00,VIC; $9110 - port b I/O register
9111,VIA1REG01,VIA1; $9111 - port a I/O register
9112,VIA1REG02,VIA1; $9112 - data direction register for port b
9113,VIA1REG03,VIA1; $9113 - data direction register for port a
9114,VIA1REG04,VIA1; $9114 - timer 1 (lsb) of count
9115,VIA1REG05,VIA1; $9115 - timer 1 (msb) of count
9116,VIA1REG06,VIA1; $9116 - timer 1 low order (lsb) latch
9117,VIA1REG07,VIA1; $9117 - timer 1 high order (msb) latch
9118,VIA1REG08,VIA1; $9118 - timer 2 low order (lsb) counter & latch
9119,VIA1REG09,VIA1; $9119 - timer 2 high order (msb) counter & latch
911A,VIA1REG10,VIA1; $911A - shift register for parallel/serial conversion
911B,VIA1REG11,VIA1; $911B - aux. control register
911C,VIA1REG12,VIA1; $911C - peripheral control register for handshaking
911D,VIA1REG13,VIA1; $911D - interrupt flag register (IFR)
911E,VIA1REG14,VIA1; $911E - interrupt enable register (IER)
911F,VIA1REG15,VIA1; $911F - mirror of VIA1PA1 (CA1 & CA2 unaffected)
9120,VIA2REG00,VIA2; $9120 - port b I/O register
9121,VIA2REG01,VIA2; $9121 - port a I/O register
9122,VIA2REG02,VIA2; $9122 - data direction register for port b
9123,VIA2REG03,VIA2; $9123 - data direction register for port a
9124,VIA2REG04,VIA2; $9124 - timer 1 (lsb) of count
9125,VIA2REG05,VIA2; $9125 - timer 1 (msb) of count
9126,VIA2REG06,VIA2; $9126 - timer 1 low order (lsb) latch
9127,VIA2REG07,VIA2; $9127 - timer 1 high order (msb) latch
9128,VIA2REG08,VIA2; $9128 - timer 2 low order (lsb) counter & latch
9129,VIA2REG09,VIA2; $9129 - timer 2 high order (msb) counter & latch
912A,VIA2REG10,VIA2; $912A - shift register for parallel/serial conversion
912B,VIA2REG11,VIA2; $912B - aux. control register
912C,VIA2REG12,VIA2; $912C - peripheral control register for handshaking
912D,VIA2REG13,VIA2; $912D - interrupt flag register (IFR)
912E,VIA2REG14,VIA2; $912E - interrupt enable register (IER)
912F,VIA2REG15,VIA2; $912F - mirror of VIA1PA1 (CA1 & CA2 unaffected)
;---- BASIC 2.0
C474,READY,$C474 - display READY. message
CEF7,,$CEF7 - check for right parenthasis ')'
CEFA,,$CEFA - check for left parenthasis '('
CEFD,COMCHK,$CEFD - check for comma ','
D79B,GETBYT,$D79B - get number in .X
D7F7,MAKADR,$D7F7 - convert FAC to 2 byte integer
;---- KERNAL
E3A4,INITBA,$E3A4 - init BASIC: restore CHRGET & zp pointers
E467,WARMBAS,$E467 - warm start BASIC
E505,SCRN,$E505 - get max number of screen columns
E50A,PLOT,$E50A - read or set cursor column and row
E518,INITSK,$E518 - init VIC, screen and related pointers
E55F,CLSR,$E55F - clear the screen
E581,HOME,$E581 - home the cursor
E587,SETSLINK,$E587 - reset screen line link table
E5BB,SETIODEF,$E5BB - reset default device numbers
E5C3,INITVIC,$E5C3 - reset VIC registers
E64F,GETSCRN,$E64F - get input from screen
E975,SCRL,$E975 - scroll the screen
E9EE,OPENLIN,$E9EE - open a blank screen line
EA56,,$EA56 - move a screen line
EA6E,MOVLINE,
EA8D,CLRALINE,$EA8D - clear a screen line
EABF,IRQ,$EABF - IRQ interrupt handler
EB1E,SCNKEY,$EB1E - scan VIA2 for keypress
EBDC,SETKEYS,$EBDC - set keyboard decode table
EE14,TALK,$EE14 - serial: send talk w/attention
EE17,LISTEN,$EE17 - serial: send listen w/attention
EE1C,LISTI,$EE1C - serial: prep to send command w/attention
EE49,SRSEND,$EE49 - serial: send command or data
EEB4,SRBAD,$EEB4 - serial: set ST for timeout or dev. not present
EEC0,SECOND,$EEC0 - serial: send secondary address after listen
EEC5,SCATN,$EE5C - serial: clear attention
EECE,TKSA,$EECE - serial: send secondary addresss after talk
EEE4,CIOUT,$EEE4 - serial: send a byte
EEF6,UNTLK,$EEF6 - serial: send untalk
EF04,UNLSN,$EF04 - serial: send unlisten
EF19,ACPTR,$EF19 - serial: receive a byte
EF84,SCCLKHI,$EF84 - serial: set clock line high
EF8D,SRCLK0,$EF8D - serial: set clock line low
EF96,WAITABIT,$EF96 - serial: delay one millisecond
F1F5,GETIN,$F1F5 - routing fot get a character of input data
F20E,CHRIN,$F20E - get character from input device
F27A,CHROUT,$F27A - output character to output device
F2C7,CHKIN,$F2C7 - open .X file number channel for input
F309,CHKOUT,$F309 - open .X file number channel for output
F34A,CLOSE,$F34A - close logical file number in .A
F3EF,CLALL,$F3EF - abort all open files (no close)
F3F3,CLRCHN,$F3F3 - abort all open channels
F40A,OPEN,$F40A - open a logical file
F542,LOAD,$F642 - load(or verify) to RAM from current device
F675,SAVE,$F675 - save RAM to current device
F77E,FILEMSG,$F77E - I/O file error messgae handler
FD22,START,$FD22 - power-on/reset routine
FD3F,CHKAUTO,$FD3F - check for autostart catridge
FD52,RESETVEC,$FD52 - reset system RAM vectors to default
FD57,RESTOR,$FD57 - read or set system RAM vectors
FD8D,INITMEM,$FD8D - init system memory
FDF9,INITVIA,$FDF9 - init VIA registers
FE49,SETNAM,$FE49 - set filename
FE50,SETLFS,$FE50 - set file number, device & secondary address
FE73,MEMTOP,$FE73 - read or set top of memory pointer
FE82,MEMBOT,$FE82 - read or set bottom of memory pointer
FE91,TSTMEM,$FE81 - test a memory location
FEA9,NMI,$FEA9 - NMI handler routine
FED2,BREAK,$FED2 - break interrupt entry
FF72,IRQOUT,$FF72 - IRQ routine initial 6502 entry point
FF81,CINT,Init Editor & Display
FF84,IOINIT,Init I/O Devices (ports
FF87,RAMTAS,Initialize RAM And Buffers For System
FF8A,RESTOR,Restore Vectors to Initial System
FF8D,VECTOR,Change Vectors For USER
FF90,SETMSG,Control O.S. Message
FF93,SECND,Send SA After LISTEN
FF96,TKSA,Send SA After TALK
FF99,MEMTOP,Set/Read Top Of System RAM
FF9C,MEMBOT,Set/Read Bottom Of System RAM
FF9F,KEY,Scan Keyboard (Editor)
FFA2,SETTMO,Set Timeout In IEEE (reserved)
FFA5,ACPTR,Handshake Serial Byte In
FFA8,CIOUT,Handshake Serial Byte Out
FFAB,UNTLK,Send UNTALK Out Serial
FFAE,UNLSN,Send UNLISTEN Out Serial
FFB1,LISTN,Send LISTEN Out Serial
FFB4,TALK,Send TALK Out Serial
FFB7,READSS,Return I/O Status Byte
FFBA,SETLFS,Set LA
FFBD,SETNAM,Set Length And File Name Address
FFC0,OPEN,OPEN Logical File
FFC3,CLOSE,CLOSE Logical File
FFC6,CHKIN,Set Channel In
FFC9,CKOUT,Set Channel Out
FFCC,CLRCH,Restore Default I/O Channel
FFCF,CHRIN,INPUT From Channel
FFD2,CHROUT,OUTPUT To Channel
FFD5,LOADSP,LOAD From File
FFD8,SAVESP,SAVE to File
FFDB,SETTIM,Set Internal Clock
FFDE,RDTIM,Read Internal Clock
FFE1,STOP,Scan STOP Key
FFE4,GETIN,Read Buffered Data
FFE7,CLALL,Close All Files And Channels
FFEA,UDTIM,Increment Internal Clock
FFED,SCRORG,Return Screen Window Size (Editor)
FFF0,PLOT,Read/Set X
FFF3,IOBASE,Return I/O Base
FFF8,SYSTEM,Operating System Vector (RAM1)
FFFA,NMI,Processor NMI Vector
FFFC,RESET,Processor RESET Vector
FFFE,IRQ,Processor IRQ/BRK Vector