mirror of
https://github.com/fadden/6502bench.git
synced 2024-12-03 05:49:48 +00:00
310 lines
16 KiB
Plaintext
310 lines
16 KiB
Plaintext
; See the LICENSE file for distribution terms (Apache 2.0).
|
|
;
|
|
; Parts adapted from multiple sources:
|
|
;
|
|
; - Commodore 1541 / OC-118 Disk Drive Memory Map (v1.3, Jan 18, 1995)
|
|
; https://ist.uwaterloo.ca/~schepers/MJK/ascii/1541map.txt
|
|
;
|
|
; - Commodore 1541 drive memory map
|
|
; https://sta.c64.org/cbm1541mem.html
|
|
;
|
|
; - DOS 2.6 ROM LISTINGS (v1.0, Feb 11, 2000)
|
|
; http://www.ffd2.com/fridge/docs/1541dis.html
|
|
;
|
|
; - CBM DOS ROM disassembly and memory variables for Commodore 1541 drive
|
|
; https://g3sl.github.io/c1541rom.html
|
|
|
|
*SYNOPSIS 1541 ROM and memory-mapped I/O labels
|
|
|
|
via1PortB @ $1800 ;VIA1: port B serial bus
|
|
via1PortA @ $1801 ;VIA1: port A. Read to ack interrupt from ATN IN going high
|
|
via1PortBddr @ $1802 ;VIA1: port B data direction reg
|
|
via1PortAddr @ $1803 ;VIA1: port A data direction reg
|
|
via1Timer @ $1805 ;VIA1: Timer
|
|
via2PortB @ $1c00 ;VIA2: PB, control port B
|
|
via2PortA @ $1c01 ;VIA2: PA, port A (data to and from read/write head)
|
|
via2PortBddr @ $1c02 ;VIA2: CB, data direction port B
|
|
via2PortAddr @ $1c03 ;VIA2: A, data direction port A
|
|
timerLo @ $1c04 ;Timer low byte
|
|
timerHi @ $1c05 ;Timer high byte, write to start timer
|
|
timerStartValLo @ $1c06 ;Timer starting value low byte
|
|
timerStartValHi @ $1c07 ;Timer starting value high byte
|
|
timerCtrl @ $1c0b ;Timer control register
|
|
auxCtrl @ $1c0c ;Auxiliary control register
|
|
interruptStatus @ $1c0d ;Interrupt status register
|
|
interruptCtrl @ $1c0e ;Interrupt control register
|
|
ledOnCurrDrive @ $c100 ;Turn LED on for current drive
|
|
ledOn @ $c118 ;Turn LED on
|
|
clrErrors @ $c123 ;Clear error flags
|
|
prepLedFlash @ $c12c ;Prepare for LED flash after error
|
|
interpretCmd @ $c146 ;Interpret command from computer
|
|
prepError @ $c194 ;Prepare error msg after executing command
|
|
clrInputBuf @ $c1bd ;Erase input buffer
|
|
outErrorMsg @ $c1c8 ;Output error msg (track and sector 0)
|
|
chkInputLine @ $c1d1 ;Check input line
|
|
srchInputBuf @ $c268 ;Search character in input buffer
|
|
chkLineLen @ $c2b3 ;Check line length
|
|
clrInputFlags @ $c2dc ;Clear flags for command input
|
|
prsrvDriveNum @ $c312 ;Preserve drive number
|
|
searchDriveNum @ $c33c ;Search for drive number
|
|
getDriveNum @ $c368 ;Get drive number
|
|
reserveDriveNum @ $c38f ;Reverse drive number
|
|
chkFileType @ $c398 ;Check given file type
|
|
chkDriveNum @ $c3bd ;Check given drive number
|
|
verifyDriveNum @ $c3ca ;Verify drive number
|
|
searchDir @ $c44f ;Search for file in directory
|
|
testInitDrive @ $c63d ;Test and initalise drive
|
|
fnInDirBuf @ $c66e ;Name of file in directory buffer
|
|
putFnInWorkBuf @ $c688 ;Copy filename to work buffer
|
|
searchEndOfName @ $c6a6 ;Search for end of name in command
|
|
clrDirOutputBuf @ $c7ac ;Clear Directory Output Buffer
|
|
hdrWithDiskName @ $c7b7 ;Create header with disk name
|
|
printBlocksFree @ $c806 ;Print 'blocks free.'
|
|
deleteCmd @ $c823 ;Perform S - Scratch command
|
|
deleteFile @ $c87d ;Erase file
|
|
deleteEntry @ $c8b6 ;Erase dir entry
|
|
formatCmd @ $c8c6 ;Format disk
|
|
copyCmd @ $c8f0 ;Perform C - Copy command
|
|
renameCmd @ $ca88 ;Perform R - Rename command
|
|
presentCmd @ $cacc ;Check if file present
|
|
memoryCmd @ $caf8 ;Perform M - Memory command
|
|
memReadCmd @ $cb20 ;M-R memory read
|
|
memWriteCmd @ $cb50 ;M-W memory write
|
|
userCmd @ $cb5c ;Perform U - User command
|
|
openDirAccChnl @ $cb84 ;Open direct access channel, number
|
|
blockCmd @ $cc1b ;Perform B - Block/Buffer command
|
|
parseBlkParams @ $cc6f ;Get parameters from block commands
|
|
blockFreeCmd @ $ccf5 ;B-F block free
|
|
blockAllocCmd @ $cd03 ;B-A block allocate
|
|
readBlockToBuf @ $cd36 ;Read block to buffer
|
|
getBufByte @ $cd3c ;Get byte from buffer
|
|
readBlock @ $cd42 ;Read block from disk
|
|
blkReadCmd @ $cd56 ;B-R block read
|
|
blkReadInPlace @ $cd5f ;U1, Block read without changing buffer pointer
|
|
blkWriteCmd @ $cd73 ;B-W block write
|
|
blkWriteInPlace @ $cd97 ;U2, Block write without changing buffer pointer
|
|
blkExecCmd @ $cda3 ;B-E block execute
|
|
blkPtrCmd @ $cdbd ;B-P block pointer
|
|
openChnl @ $cdd2 ;Open channel
|
|
chkBufNum @ $cdf2 ;Check buffer number and open channel
|
|
setRelFilePtr @ $ce0e ;Set pointer for REL file
|
|
div254 @ $ce6e ;Divide by 254
|
|
div120 @ $ce71 ;Divide by 120
|
|
eraseWrkMem @ $ced9 ;Erase work storage
|
|
chgBuf @ $cf8c ;Change buffer
|
|
writeInBuf @ $cf9b ;Write data in buffer
|
|
writeByteInBuf @ $cff1 ;Write data byte in buffer
|
|
initCmd @ $d005 ;Perform I - Initalise command
|
|
readBam @ $d00e ;Read BAM from disk
|
|
loadBam @ $d042 ;Load BAM
|
|
calcFree @ $d075 ;Calculate blocks free
|
|
readBlock @ $d0c3 ;Read block
|
|
writeBlock @ $d0c7 ;Write block
|
|
openReadChnl @ $d0eb ;Open channel for reading
|
|
openWriteChnl @ $d107 ;Open channel for writing
|
|
checkForRel @ $d125 ;Check for file type REL
|
|
getBufChnlNums @ $d12f ;Get buffer and channel numbers
|
|
getByteFromBuf @ $d137 ;Get a byte from buffer
|
|
getByteNextBlk @ $d156 ;Get byte and read next block
|
|
writeToBufBlk @ $d19d ;Write byte in buffer and block
|
|
incBufPtrs @ $d1c6 ;Increment buffer pointer
|
|
getDriveNum @ $d1d3 ;Get drive number
|
|
findWChnlBuf @ $d1df ;Find write channel and buffer
|
|
findRChnlBuf @ $d1e2 ;Find read channel and buffer
|
|
closeChnl @ $d227 ;Close channel
|
|
freeBuf @ $d25a ;Free buffer
|
|
findBuf @ $d28e ;Find buffer
|
|
closeAllChnls @ $d307 ;Close all channels
|
|
closeAllDChnls @ $d313 ;Close all channels of other drives
|
|
findChnlAlloc @ $d37f ;Find channel and allocate
|
|
getByteOutput @ $d39b ;Get byte for output
|
|
readNextBlk @ $d44d ;Read next block
|
|
readBlk @ $d460 ;Read block
|
|
writeBlk @ $d464 ;Write block
|
|
allocBufandRead @ $d475 ;Allocate buffer and read block
|
|
allocBlk @ $d486 ;Allocate new block
|
|
writeDirBlk @ $d48d ;Write dir block
|
|
setBufPtr @ $d4c8 ;Set buffer pointer
|
|
closeIntChnl @ $d4da ;Close internal channel
|
|
setBufPtr2 @ $d4e8 ;Set buffer pointer
|
|
getByteFromBuf2 @ $d4f6 ;Get byte from buffer
|
|
chkTSnums @ $d506 ;Check track and sector numbers
|
|
getTSForJob @ $d552 ;Get track and sector numbers for current job
|
|
chkValidTSNums @ $d55f ;Check for vaild track and sector numbers
|
|
errorDosMismtch @ $d572 ;DOS mismatch error
|
|
readBlk2 @ $d586 ;Read block
|
|
writeBlk2 @ $d58a ;Write block
|
|
verifyExe @ $d599 ;Verify execution
|
|
verifyExeNoWait @ $d5a6 ;Verify execution (without wait)
|
|
attempts @ $d5c6 ;Additional attempts for read errors
|
|
moveHeadHalfTrk @ $d676 ;Move head by half a track
|
|
moveHeadOneTrk @ $d693 ;Move head one track in or out
|
|
multiAttemptCmd @ $d6a6 ;Attempt command execution multiple times
|
|
parmsToCtrl @ $d6d0 ;Transmit param to disk controller
|
|
enterFileInDir @ $d6e4 ;Enter file in dir
|
|
open @ $d7b4 ;OPEN command, secondary addr 15
|
|
checkAstr @ $d7c7 ;Check '*' Last file
|
|
checkDolr @ $d7f3 ;Check '$' Directory
|
|
checkHash @ $d815 ;Check '#' Channel
|
|
openOverwrite @ $d8f5 ;Open a file with overwriting (@)
|
|
openRead @ $d9a0 ;Open file for reading
|
|
openWrite @ $d9e3 ;Open file for writing
|
|
chkTypetrl @ $da09 ;Check file type and control mode
|
|
prepAppend @ $da2a ;Preparation for append
|
|
openDir @ $da55 ;Open directory
|
|
closeRoutine @ $dac0 ;Close routine
|
|
closeFile @ $db02 ;Close file
|
|
writeLastBlk @ $db62 ;Write last block
|
|
dirEntry @ $dba5 ;Directory entry
|
|
readBlkAllocBuf @ $dc46 ;Read block, allocate buffer
|
|
resetPtr @ $dcb6 ;Reset pointer
|
|
makeNewBlk @ $dcda ;Construct a new block
|
|
writeSideSecBlk @ $dd8d ;Write byte in side-sector block
|
|
verifyWriteCmd @ $ddab ;Verify command code for writing
|
|
writeRelBlk @ $ddf1 ;Write a block of a REL file
|
|
writeForNextTrk @ $ddfd ;Write bytes for following track
|
|
getTSnums @ $de0c ;Get following track and sector numbers
|
|
folTrkLastBlk @ $de19 ;Following track for last block
|
|
zeroBufPtr @ $de2b ;buffer pointer to zero
|
|
getTSnums2 @ $de3b ;Get track and sector
|
|
getTSfromBuf @ $de95 ;Get following track and sector from buffer
|
|
copyBuf @ $dea5 ;Copy buffer contents
|
|
eraseBuf @ $dec1 ;Erase buffer Y
|
|
getSideSecNum @ $ded2 ;Get side-sector number
|
|
setBufPtrToSS @ $dedc ;Set buffer pointer to side-sector
|
|
getSSandBufPtr @ $def8 ;Get side sector and buffer pointer
|
|
readSS @ $df1b ;Read side-sector
|
|
writeSS @ $df21 ;Write side-sector
|
|
setBufInSS @ $df45 ;Set buffer pointer in side-sector
|
|
blocksInRelFile @ $df4c ;Calculate number of blocks in a REL file
|
|
verifySSinBuf @ $df66 ;Verify side-sector in buffer
|
|
getBufNum @ $df93 ;Get buffer number
|
|
nextRecInRel @ $dfd0 ;Get next record in REL file
|
|
writeBlkGetNext @ $e03c ;Write block and read next block
|
|
writeByteInRec @ $e07c ;Write a byte in a record
|
|
writeByteInRel @ $e0ab ;Write byte in REL file
|
|
zeroFillRec @ $e0f3 ;Fill record with 0s
|
|
writeBufNumTbl @ $e105 ;Write buffer number in table
|
|
getByteFromRel @ $e120 ;Get byte from REL file
|
|
getLastSS @ $e1cb ;Get last side-sector
|
|
positionCmd @ $e207 ;Perform P - Position command
|
|
blksToRecords @ $e2e2 ;Divide data blocks into records
|
|
prtToNextRec @ $e304 ;Set pointer to next record
|
|
expandSS @ $e31c ;Expand side-sector
|
|
writeSSallocNxt @ $e44e ;Write side-sector and allocate new
|
|
prepErrNumMsg @ $e60a ;Prepare error number and message
|
|
errorMsgToBuf @ $e645 ;Print error message into error buffer
|
|
talk3 @ $e680 ;TALK
|
|
listen @ $e688 ;LISTEN
|
|
binToPetscii @ $e69b ;Convert BIN to petscii (error message buffer)
|
|
bcdToPetscii @ $e6ab ;Convert BCD to petscii (error message buffer)
|
|
writeOK @ $e6bc ;Write OK in buffer
|
|
trk0ErrorToBuf @ $e6c1 ;Print error on track 00,00 to error buffer
|
|
curTrkErrToBuf @ $e6c7 ;Print error on current track to error buffer
|
|
errMsgToBuf @ $e706 ;Write error message string to buffer
|
|
tokenIntoBuf @ $e754 ;Get character and in buffer
|
|
getErrMsgChar @ $e767 ;Get a char of the error message
|
|
incPtr @ $e775 ;Increment pointer
|
|
usrExecCmd @ $e7a3 ;Perform & - USR file execute command
|
|
genChecksum @ $e84b ;Generate checksum
|
|
serialIrq @ $e853 ;IRQ routine for serial bus
|
|
serialService @ $e85b ;Service the serial bus
|
|
serialSend @ $e909 ;Send data
|
|
serialDataOutLo @ $e99c ;DATA OUT lo
|
|
serialDataOutHi @ $e9a5 ;DATA OUT hi
|
|
serialClkOutHi @ $e9ae ;CLOCK OUT hi
|
|
serialClkOutLo @ $e9b7 ;CLOCK OUT lo
|
|
readIEEE @ $e9c0 ;Read IEEE port
|
|
getByteFromBus @ $e9c9 ;Get data byte from bus
|
|
getByteWithEOI @ $e9f2 ;Accept byte with EOI
|
|
acceptData @ $ea2e ;Accept data from serial bus
|
|
testATN @ $ea59 ;Test for ATN
|
|
ledFlash @ $ea6e ;Flash LED for hardware defects, self-test
|
|
reset @ $eaa0 ;Power-up RESET routine
|
|
wait @ $ebff ;Wait loop
|
|
loadDir @ $ec9e ;Load dir
|
|
transmitDirLine @ $ed59 ;Transmit dir line
|
|
getByteFromBuf3 @ $ed67 ;Get byte from buffer
|
|
validateCmd @ $ed84 ;Perform V - Validate command
|
|
bamAlloc @ $ede5 ;Allocate file blocks in BAM
|
|
formatCmd2 @ $ee0d ;Perform N - New (Format) command
|
|
createBAM @ $eeb7 ;Create BAM
|
|
writeBAM @ $eef4 ;Write BAM if needed
|
|
setBAMptr @ $ef3a ;Set buffer pointer for BAM
|
|
getDirBlksFree @ $ef4d ;Get number of free blocks for dir
|
|
markBlkFree @ $ef5c ;Mark block as free
|
|
markBAMchanges @ $ef88 ;Set flag for BAM changed
|
|
markBlkAlloc @ $ef90 ;Mark block as allocated
|
|
delBAMsecBit @ $efcf ;Erase bit for sector in BAM entry
|
|
updateBAM @ $eff1 ;Write BAM after change
|
|
delBAMbuf @ $f005 ;Erase BAM buffer
|
|
clearBAM @ $f0d1 ;Crear BAM
|
|
getBAMbufNum @ $f10f ;Get buffer number for BAM
|
|
bamBufNum @ $f119 ;Buffer number for BAM
|
|
findFreeBlkAloc @ $f11e ;Find and allocate free block
|
|
findFreeSecAloc @ $f1a9 ;Find free sector and allocate
|
|
findFreeSectors @ $f1fa ;Find free sectors in current track
|
|
verFreeBAMblks @ $f220 ;Verify number of free blocks in BAM
|
|
numSecsPerTrk @ $f24b ;Establish number of sectors per track
|
|
initCtrl @ $f259 ;Initialise disk controller
|
|
irqCtrl @ $f2b0 ;IRQ routine for disk controller
|
|
headTransport @ $f2f9 ;Head transport
|
|
execInBuf @ $f36e ;Execute program in buffer
|
|
bump @ $f37c ;Bump, find track 1 (head at stop)
|
|
initPtrInBuf @ $f393 ;Initialise pointer in buffer
|
|
readBlkHdr @ $f3b1 ;Read block header, verify ID
|
|
prsrvBlkHdr @ $f410 ;Preserve block header
|
|
okInQueue @ $f418 ;Work Return value $01 (OK) into queue
|
|
error0bInQueue @ $f41b ;Work Return value $0b (READ ERROR) into queue
|
|
error09InQueue @ $f41e ;Work Return value $09 (READ ERROR) into queue
|
|
optimizeJob @ $f423 ;Job optimisation
|
|
readSec @ $f4d1 ;Read sector
|
|
findBlkStart @ $f50a ;Find start of data block
|
|
readBlkHdr2 @ $f510 ;Read block header
|
|
waitSync @ $f556 ;Wait for SYNC
|
|
writeBlk3 @ $f575 ;Write data block to disk
|
|
calcBufParity @ $f5e9 ;Calculate parity for data buffer
|
|
gcrToBin @ $f5f2 ;Convert buffer of GCR data into binary
|
|
findSec @ $f6ca ;Command code for find sector
|
|
bytesToGcrBytes @ $f6d0 ;Convert 4 binary bytes to 5 GCR bytes
|
|
gcrTable @ $f77f 16 ;GCR (5-bit) nybble table
|
|
gcrBytesToBytes @ $f7e6 ;Convert 5 GCR bytes to 4 binary bytes
|
|
tblGCRToBinHi @ $f8a0 64 ;Conversion table GCR to binary - high nybble
|
|
tblGCRToBinLo @ $f8c0 64 ;Conversion table GCR to binary - low nybble
|
|
decod69GcrBytes @ $f8e0 ;Decode 69 GCR bytes
|
|
blkHdrToGcr @ $f934 ;Convert block header to GCR code
|
|
errEntry @ $f969 ;Error entry disk controller
|
|
motorOn @ $f97e ;Turn drive motor on
|
|
motorOff @ $f98f ;Turn drive motor off
|
|
jobLoop @ $f99c ;Job loop disk controller
|
|
moveHeadNextTrk @ $fa05 ;Move head to next track
|
|
calNumSteps @ $fa1c ;Calculate number of head steps
|
|
nudgeStepper @ $fa3b ;Move stepper motor short distance
|
|
loadHead @ $fa4e ;Load head
|
|
prepFastHeadMov @ $fa7b ;Prepare fast head movement
|
|
fastHeadMov @ $fa97 ;Fast head movement
|
|
prepSlowHeadMov @ $faa5 ;Prepare slow head movement
|
|
formatRoutine @ $fac7 ;Formatting
|
|
writeSyncs @ $fda3 ;Write SYNC 10240 times, erase track
|
|
writeByteFill @ $fdc3 ;Read/write ($621/$622) times
|
|
formatErrRetry @ $fdd3 ;Attempt counter for formatting
|
|
cpyOvflwDataBuf @ $fdf5 ;Copy data from overflow buffer
|
|
switchToRead @ $fe00 ;Switch to reading
|
|
write55Fill @ $fe0e ;Write $55 10240 times
|
|
buf0HdrToGcr @ $fe30 ;Convert header in buffer 0 to GCR code
|
|
irdMainSystem @ $fe67 ;Interrupt routine
|
|
jmpToVNMI @ $fee7 ;From UI command $eb22, to reset
|
|
diagPatch @ $feea ;Patch for diagnostic routine from $ea7a
|
|
serialBusDelay @ $fef3 ;Delay loop for serial bus in 1541 mode, from $e97d
|
|
serialOutPatch @ $fefb ;Patch for data output to serial bus, from $e980
|
|
switch1540_1541 @ $ff01 2 ;U9 vector, switch 1540/1541
|
|
resetPatch @ $ff10 ;Patch for reset routine, from $eaa4
|
|
listenPatch @ $ff20 ;Patch for listen to serial bus, from $e9dc
|
|
vecFormat @ $ffe6 2 ;vector for format
|
|
vecOff @ $ffe8 2 ;vector for $f98f
|
|
vecUblkkrd @ $ffea 2 ;vector for $cd5f
|
|
vecUblkwt @ $ffec 2 ;vector for $cd97
|
|
vecNMI @ $fffa 2 ;vector to $ff01
|
|
vecInit @ $fffc 2 ;vector to $eaa0
|
|
vecIrq @ $fffe 2 ;vector to $fe67
|