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AppleWin/docs/DiskII Formatter/formatter.s

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ORG $2000 ;Re-ORG as necessary
LST ON,S,ASYM,VSYM
SBTL 'DISK FORMAT & PREPARATION ROUTINE'
REP 50
*
* APPLE'S PRODOS FORMATTING/DISK BUILDING MODULE
*
* VERSION 1.0.3
*
*
* MODIFIED FOR COMPLIANCE WITH PRODOS TECHNOTE #16
* AND, TO CONSOLIDATE BUILDDISK, AND FORMATTER.
* INTO ONE MODULE, ACCESSED WITH A SINGLE CALL.
* ALSO TO PROVIDE A MECHANISM FOR THE USER TO
* DETERMINE THE NUMBER OF BLOCKS ON THE DEVICE,
* AND WHETHER IT IS A DISK II, /RAM, OR OTHER.
* ON 10/17/85, BY PETE MC DONALD.
*
* COPYRIGHT APPLE COMPUTER, INC., 1982-85
*
REP 50
*
* ENTRY1: (ORG+$10)
* INITIALIZES THE SPECIFIED UNIT #. BY:
* -FORMATTING PHYSICAL MEDIA. IF IT CAN BE FORMATTED
* -WRITING BOOT LOADER IN BLOCKS 0,1 (EVEN IF IT IS
* NOT A DISK II).
* -CREATING VOLUME DIRECTORY IN BLOCKS 2,3,4,5 WITH
* THE NAME CONTAINED IN THE FIRST 16 BYTES OF THE MODULE.
* -ALLOCATING BIT MAP IN BLOCKS 6 AND UP.
*
* ON ENTRY, @ ENTRY1 (ORG+$10):
* A = THE UNIT NUMBER, IN THE FORMAT REQUIRED BY THE
* PRODOS WRITE BLOCK CALL.
* X/Y = THE ADDRESS OF A BUFFER OF AT LEAST 512 BYTES
* WHICH THIS ROUTINE CAN FREELY USE. X = THE
* LOW PART OF THE ADDRESS.
* THE FIRST 16 BYTES OF THE MODULE MUST CONTAIN THE DESIRED
* VOLUME NAME, WHERE THE FIRST BYTE CONTAINS THE LENGTH
* OF THE NAME (SHOULD BE 1 THRU 15) AND THE REMAINING 15
* BYTES CONTAIN THE NAME (SHOULD BE A PROPER VOLUME
* NAME, WITH NO LEADING SLASH). THE ORIGINAL
* CONTENTS OF THESE 16 BYTES ARE 12 (THE LENGTH), AND THE
* NAME 'DEFAULT.NAME '. NO CHECKING IS DONE ON THESE
* 16 BYTES, BUT BIT 7 IS STRIPPED FROM EACH BYTE OF THE
* NAME.
*
*
* ON RETURN:
* Z IS UNDEFINED.
* C = THE ERROR STATUS:
* C = 0 INDICATES NO DETECTED ERRORS.
* C = 1 INDICATES AN ERROR, IN WHICH CASE THE ACCUMULATOR
* CONTAINS THE PRODOS ERROR CODE.
* A = 0 IF THERE WAS NO ERROR (C = 0), OR IT CONTAINS THE
* PRODOS ERROR CODE IF THERE WAS AN ERROR (C = 1).
* X AND Y ARE DESTROYED.
* THE FIRST 512 BYTES OF THE BUFFER ARE DESTROYED.
* 0-PAGE LOCATIONS 2 AND 3 HAVE BEEN USED, BUT HAVE BEEN RESTORED
* TO THEIR VALUES AT ENTRY.
* 0-PAGE LOCATIONS $42-$47 HAVE BEEN CHANGED AND NOT RESTORED.
*
* IF CALLED FOR A NON-EXISTENT DISK (INCLUDING SLOT 0),
* ERROR $28 WILL BE RETURNED.
* IF IT IS AN EXISTENT UNIT NUMBER, THE PROCESS BEGINS,
* AND OTHER ERRORS ARE THEN POSSIBLE.
*
* USES UNIT, ROM ID'S, AND DRIVER ADDRESS TO DETERIME SIZE
* THOSE DEVICES FOR WHICH THE SIZE IS GOTTEN BY
* A STATUS CALL TO THE SLOT'S ROM, THE DRIVE BIT IS
* PRESENT IN LOCATION $43 AND IS USED TO INDEX INTO THE
* DRIVER VECTOR TABLE. THEREFORE, THE 2 DRIVES IN A SLOT
* COULD BE DIFFERENT SIZES.
*
page
REP 50
*
* ENTRY2 (ORG+$13):
* RETURNS THE SIZE AND WHETHER IS DISK II, /RAM, OR OTHER.
*
* ON ENTRY, @ ENTRY2 (ORG+$13):
* A = UNIT NUMBER, IN FORMAT REQUIRED BY PRODOS.
* X/Y = THE ADDRESS OF A BUFFER OF AT LEAST 512 BYTES,
* WHICH THIS ROUTINE CAN USE FREELY. X = THE
* LOW PART OF THE ADDRESS.
*
*
* ON RETURN:
* Z IS UNDEFINED.
* C = THE ERROR STATUS.
* C = 0, NO ERROR
* C = 1, AN ERROR WAS DETECTED.
* X = (SIZE lo) IF C = 0, X = UNDEFINED IF C = 1
* Y = (SIZE HI) IF C = 0. IF C = 1 THEN y = undefined
* A = error code if C = 1: IF C = 0 then
* A = 0 FOR DISK II, A = 1 FOR /RAM, A = 2 FOR ALL OTHERS.
*
* THE FIRST 512 BYTES OF THE BUFFER ARE DESTROYED.
* ZERO PAGE LOCS 2 AND 3 HAVE BEEN USED, BUT HAVE
* BEEN RESTORED TO THEIR VALUES AT ENTRY.
* 0 - PAGE LOCATIONS 42-47, HAVE BEEN CHANGED AND
* NOT RESTORED.
*
* IF CALLED FOR NON EXISTENT DEVICE, ERROR $28 WILL BE RETURNED
* IF CALLED FOR EXISTENT DEVICE, PROCESS WILL BEGIN, AND THEN
* OTHER ERRORS ARE POSSIBLE.
*
* USES UNIT, ROM ID'S, AND DRIVER ADDRESS TO DETERIME SIZE
* THOSE DEVICES FOR WHICH THE SIZE IS GOTTEN BY
* A STATUS CALL TO THE SLOT'S ROM, THE DRIVE BIT IS
* PRESENT IN LOCATION $43 AND IS USED TO INDEX INTO THE
* DRIVER VECTOR TABLE. THEREFORE, THE 2 DRIVES IN A SLOT
* COULD BE DIFFERENT SIZES.
*
page
REP 50
*
MLIENTRY EQU $BF00 ;MLI ENTRY POINT
DEVADRS01 EQU $BF10 ;DEVICE DRIVER VECTOR TABLE
DEVCNT EQU $BF31 ;ONLINE DEVICE COUNT
DEVLST EQU $BF32 ;ONLINE DEVICE LIST
DATELO EQU $BF90 ;DATE/TIME (4 BYTES)
KMVERSN EQU $BFFE ;MINIMUM VERSION #
KVERSION EQU $BFFF ;PRODOS VERSION
ENTRYB EQU $0D ;ENTRIES/BLOCK IN A DIRECTORY
ENTRYL EQU $27 ;DIRECTORY ENTRY LENGTH
*
* PAGE ZERO LOCATIONS
*
BUFFPTR EQU 2 ;AND 3
DEVCMD EQU $42
DEVUNIT EQU $43
DEVBLK EQU $46 ;AND 47
*
BUILDDISK EQU *
*
DUMSIZE DB 12 ;SIZE OF THE DUMMY NAME
DUMMYNAM ASC 'DEFAULT.NAME '
page
*
* ACTUAL ENTRY POINTS ARE HERE
*
entry1 jmp form ;normal builddisk entry
entry2 jmp stat ;return device size and type.
*
* this performs the normal format and disk build operations
*
form jsr validate ;save regs/verify unit num
bcs out ;error go home zp restored by validate
jmp Build ;else do format/build
*
* returns device size in x/y y=hi, and a= 0 for DISK II,
* 1 for /RAM, 2 for all others./
*
stat jsr validate ;save zp/validate unit #
bcs out ;error go home/zp restored by validate.
jsr getblks ;else get and return size/type of unit
stx loctemp ;save size hi for a sec
jsr error ;no error, but fix zp locs 2,3
tax ;for the sake of consistency swap
tya ;regs around to conform with normal
ldy loctemp ;status call.
out rts ;bye
*
Validate STA UNITNUM1 ;SAVE THE PASSED UNIT NUMBER
STA UNITNUM2 ;SAVE THE PASSED UNIT NUMBER
STA UNITNUM3 ;SAVE THE PASSED UNIT NUMBER
*
AND #$F0 ;CLEAR LO BITS JUST IN CASE
STA UNITLEFT ;SAVE FOR LATER (LEFT JUSTIFIED)
*
LDA BUFFPTR ;SAVE CURRENT CONTENTS OF 0-PAGE LOCATIONS
STA SAVEZERO
LDA BUFFPTR+1
STA SAVEZERO+1
*
STX BUFFPTR ;SAVE PASSED BUFFER ADDRESS IN 0-PAGE
STY BUFFPTR+1
STX LBUFFPTR ;ALSO SAVE IN LOCAL PARAMETER LIST
STY LBUFFPTR+1
*
LDX DEVCNT ; POINT TO LAST ACTIVE DISK
LOOP LDA DEVLST,X ; GET BYTE FOR ACTIVE DISK
AND #$F0 ; CLEAR OUT DISKTYPE INDICATOR
CMP UNITLEFT ; FOUND OUR DISK?
BEQ FOUND ; YES
DEX ; NO, POINT TO NEXT DISK
BPL LOOP ; IF X HAS NOT GONE NEGATIVE, THERE ARE MORE DISKS
*
* DIDN'T FIND DISK.
LDA #$28 ; SIGNAL NO DEVICE
SEC ; SIGNAL ERROR
BCS ERROR ;ALWAYS
found clc
RTS
*
BUILD equ *
jsr doformat ;go format if can
bcs error ;taken if error during format.
jsr isitram ;is unitnum /RAM ?o-SD
BNE OKDISK ;NO
*
LDA #0 ;No error, but do nothing |
CLC ; since RAMDISK Format does it for us |
BCC ERROR ;ALWAYS |
*
okdisk equ * ;mod
lda UNITLEFT ;*mod* recover disktype
STA DISKTYPE ;SAVE FOR LATER
JSR MLIENTRY ;WRITE BOOT BLOCK 0
DB $81
DW BLK0PARM
BNE ERROR
*
JSR MLIENTRY ;WRITE BOOT BLOCK 1
DB $81
DW BLK1PARM
BNE ERROR
*
JSR ROOTBLK2 ;WRITE ROOT DIRECTORY BLK 2
BCS ERROR
JSR ROOTBLKS ;WRITE ROOT DIRECTORY BLKS 3-5
BCS ERROR
JSR BITMAPS ;WRITE BIT MAP IN BLKS 6 AND UP
*
ERROR LDX SAVEZERO ;RESTORE 0-PAGE LOCATIONS
STX BUFFPTR
LDX SAVEZERO+1
STX BUFFPTR+1
*
RTS
*
SAVEZERO DW 0
DISKTYPE DB 0 ;LOW ORDER NIBBLE FROM DEVLST
*
BLK0PARM DB 3 ;3 PARAMETERS
UNITNUM1 DB 0 ;UNIT NUMBER FILLED IN FROM CALLER
DW BOOTZERO ;ADDRESS OF BOOT BLOCK
DW 0 ;WRITE TO BLOCK 0
*
BLK1PARM DB 3 ;3 PARAMETERS
UNITNUM2 DB 0 ;UNIT NUMBER FILLED IN FROM CALLER
DW BOOTONE ;ADDRESS OF BOOT BLOCK
DW 1 ;WRITE TO BLOCK 1
SBTL 'SETUP & WRITE ROOT DIRECTORY'
ROOTBLK2 EQU *
JSR MLIENTRY ;GET DATE/TIME
DB $82
DW 0
* CANNOT GENERATE AN ERROR FROM THIS CALL
JSR CLRBUFF ;CLEAR BUFFER
LDY #2 ;POINT TO FORWARD POINTER IN BUFFER
LDA #3 ;BLOCK 2 POINTS FORWARD TO BLOCK 3
STA (BUFFPTR),Y
*
LDY #4+0 ;POINT TO STORAGE TYPE/NAME LENGTH
LDA DUMSIZE ;USE DUMMY NAME
ORA #$F0 ;OR IN THE DIRECTORY MARKER
STA (BUFFPTR),Y
LDX #0 ;POINT TO FIRST CHARACTER OF NAME
RTD1 EQU *
INY
LDA DUMMYNAM,X ;GET VOLUME NAME
AND #$7F ;NO HI BIT
STA (BUFFPTR),Y ;WRITE TO BUFR
INX
CPX DUMSIZE ;DONE?
BNE RTD1 ;NO
*
LDX #0 ;POINT TO DATE/TIME IN PRODOS
LDY #4+$18 ;POINT TO DATE/TIME IN BUFFER
RT2 LDA DATELO,X ;TRANSFER DATE/TIME TO BUFFER
STA (BUFFPTR),Y
INX
INY
CPX #4
BNE RT2
*
LDA KVERSION ;GET VERSION # FROM GLOBALS
STA (BUFFPTR),Y
*
INY
LDA KMVERSN ;AND MINIMUM VERSION #
STA (BUFFPTR),Y
INY
LDA #$C3 ;GET ACCESS BYTE VALUE
STA (BUFFPTR),Y
INY
LDA #ENTRYL ;GET ENTRY LENGTH
STA (BUFFPTR),Y
INY
LDA #ENTRYB ;GET ENTRIES/BLOCK
STA (BUFFPTR),Y
LDY #4+$23 ;POINT TO BITMAP PTR
LDA #6
STA (BUFFPTR),Y
JSR GETBLKS ;GET TOTAL BLKS (A=LO,X=HI)
BCS RTRET ;QUIT ON ERROR
LDY #4+$25 ;POINT TO TOTAL BLOCKS IN BUFFER
STA (BUFFPTR),Y ;LO
STA TEMP ;ALSO STORE IN TEMP AND TEMP1
INY
TXA
STA (BUFFPTR),Y ;HI
STA TEMP1
*
LDA #1 ;SET UP TO WRITE BLOCK 2 (GETS INCREMENTED)
STA BLKNUM
JSR WRTBLK
RTRET RTS ;C=1 MEANS ERROR ON WRITE, ELSE GOOD
*
TEMP DB 0
TEMP1 DB 0
PAGE
REP 50
*
* isitram - determine if chosen unit, is /ram
*
* if vector is $ff00, then is /ram.
*
* ENTRY: unitleft contains left justified unitnum
* EXIT: X unchanged, a,y scrambled
* is ram, z=1
* not ram z=0
*
isitram equ *
lda unitleft ;get justified unit number
lsr a ;right justify
lsr a
lsr a
jsr getvect ;get device driver address
bne notram ;taken if low order of vect not 0
cpy #$FF ;is high byte $FF
bne notram ;if not is not /ram and z=0 return
lda #00 ;is /ram make z=1
notram rts ;bye
*
*
* isitdiskII - is unit number a disk II
* use signature bytes in CN00
* derive cn from unitleft
* ENtry: unitleft contains left just unitnum
* exit : z=1 is diskII
* z=0 not disKII
* a,x scramble
* y unchanged
*
isitdiskII equ *
lda unitleft ;get unit number
and #$70 ;extract slot number
lsr a ;move slot to low nibble.
lsr a
lsr a
lsr a
ora #$c0 ;append $C for a slot address
sta loadd+2 ;mod hi byte of lda to point to CNXX
ldx #3 ;init count of bytes to check
chklp lda dIIlocs,x ;get lowbyte of address to check
sta loadd+1 ;save at load instruction
loadd lda $C000 ; self modifying get byte at loc
cmp dIIids,x ;is it a DiskII signature ?
bne endDII ;taken if no
dex ;else check the next one
bpl chklp ;are there anymore ?
inx ;make z=1
endDII rts ;bye z=0 is not DII, z=1, is dII
dIIids dfb $20,0,3,0 ;DiskII signatures,
dIIlocs dfb 1,3,5,$ff ;and thier respective locations.
*
*
* DOFORMAT-format physical disk media if possible
*
* If disk II, use formatter driver.
* If ram based. Or if Rom based with can format true, use
* device format call.
* If is Rom based, and can format is not true, then do nothing.
* called only after it has been determined that unit # is valid
*
* ENTRY: BUFFPTR, & BUFFPTR+1, are user passed buffer address.
* UNITLEFT contains left justified unit num.
* UNITNUM1, contains originally passed unit num.
* A=unitnum, X&Y=don't care.
*
* EXIT: Success a=0 c=0 x,y unknown.
* Failure, a=errnum, c=1, x,y unknown.
* if ROM call made, $42-$47, destroyed.
*
*
doformat equ *
jsr isitdiskII ;is unit a disk II
bne dforcont ;taken if not
ldx #$D ;init index/count-1
savlp lda $d0,x ;save locs $D0 - $DD
sta locbuff,x
dex ;next one /any more ?
bpl savlp ;taken if yes
lda UNITLEFT ;get the original unit num
jsr FORMATTII ;format a disk II
php ;save error status
pha ;save error code (if any)
ldx #$D ;restore $d0 - $DD
reslp lda locbuff,x
sta $D0,x
dex ;next one /anymore ?
bpl reslp ;taken if yes.
pla ;recover Error code
plp ;and error status.
rts ;done bye
*
dforcont lda unitleft ;get unit num again
lsr a ;right justify
lsr a
lsr a
jsr getvect ;get vector to device driver.
sta devjmp ;save lowbyte
sty devjmp+1 ;and high byte for driver call.
tya ;get high byte of address
and #$f0 ;clear low nibble
cmp #$c0 ;does it point to $CN ?
bne dforcont1 ;taken if no.(is not ROM based)
*
sty modadd+2 ;set up LDA to point at attributes
modadd lda $C0FE ;modified by previous instruction.
and #$08 ;isolate can format bit.
bne dforcont1 ;taken if it supports formatting
clc ;does not, but no error, just return for
rts ;builddisk to write dir etc.
*
dforcont1 lda unitnum1 ;get back unit num
sta devunit ;save it for driver
lda #00 ;zero for
sta devblk ;block
sta devblk+1 ;and block hi
lda #03 ;get format command
sta devcmd ;save it for driver
sta $cfff ;turn off whoever has $c800
lda $c08b ;switch language card in
lda $c08b
jsr asjmp ;jsr to jmp indirect to driver.
bit $c082 ;switch rom back in.
rts ;ret to continue build, with error if any
*
* GETBLKS - GET # OF BLOCKS ON DEVICE.
*
* IF IT'S A DISKII, BLOCKS ARE HARDCODED AT $118. IF
* is /RAM # blocks hardcoded at $7f. If is is an
* OTHER KIND OF DISK, NUMBER OF BLOCKS MAY BE IN
* $CNFC,FD. BUT IF THEY CONTAIN 0, THEN MUST CALL
* ROM CODE WITH STATUS REQUEST TO GET BLOCKS.
*
* ENTRY: UNITNUM1, UNITLEFT, AND DISKTYPE MUST BE SET.
* EXIT: Success: Carry = 0, X=HI,A=LO BLOCKS
* : Y=0 for DISK II, Y=1 for /RAM, Y=2 for all others.
* Failure: Carry = 1, Accum = error code
* : X and Y undefined
* If ROM call is made: $42-$47 destroyed
*
REP 50
*
GETBLKS equ * ;was LDA DISKTYPE
jsr isitdiskII ;was CMP #DISKII
BNE DB1a ;NO
lda #0 ;save the fact that this is disk II
sta loctemp ;at a local temp
LDA #$18 ;YES, SIZE = 280 BLOCKS
LDX #1
BNE DB2 ;ALWAYS
*
db1a equ *
jsr isitram ;is this /RAM ?
bne db1 ;taken if not
lda #1 ;save the fact that tis is /RAM
sta loctemp ;at a local temp
ldx #0 ;and there are $7f blocks
lda #$7f ;get them and reset z
bne db2 ;alwayss
*
* Not DISK II SO CHECK $CNFC-FD
*
DB1 LDA UNITLEFT ; get unit number (left justified) |
LSR A ; SHIFT UNIT NUMBER INTO TABLE INDEX |
LSR A ; |
LSR A ; |
STA UNITRIGHT ; save it |
JSR GETVECT ;GET DRIVER VECTOR FROM TABLE |
*
* mod to check if driver is in CN00, if not must ask size.
*
tya
and #$F0 ;clear all but high nibble of address
cmp #$c0 ;is it in rom space
bne ask ;taken if not in ROM
*
*
STY BUFFPTR+1 ;HI |
LDA #$FC
STA BUFFPTR ;LO
LDY #0
LDA (BUFFPTR),Y
PHA
INY
LDA (BUFFPTR),Y
TAX
BNE DB3 ; if not zero, then size is hardwired
PLA ; get lo byte
BNE DB2 ; if not zero then return
ask JSR ASKSIZE ; need to go ask device for size
BCS RESTORE ; branch if error
lda #2 ;save the fact that this is a "other"
sta loctemp ;at a local temp
TXA ; get low byte
PHA ; save it
TYA ; get hi byte
TAX ; put in X
PLA ; get low byte back
bcc RESTORE ; GO RESTORE BUFFER POINTER AND EXIT
*
DB3 PLA
DB2 CLC ; clear carry to indicate success
RESTORE LDY LBUFFPTR ; RESTORE THE POINTER TO THE CALLER'S BUFFER
STY BUFFPTR
LDY LBUFFPTR+1
STY BUFFPTR+1
ldy loctemp ;get the kind of device anbd return it.
RTS
*
ASKSIZE EQU * ; ask device for size via status command
LDA #0 ; COMMAND BYTE = 0 (give status)
STA DEVCMD ; store in zero page parameters
STA DEVBLK ; block #
STA DEVBLK+1
LDA UNITRIGHT ; get unit # (right justified)
JSR GETVECT ; |
STA DEVJMP ; |
STY DEVJMP+1 ; |
LDA UNITNUM1 ; get unit #, with possible low nibble junk
STA DEVUNIT
STA $CFFF
lda $c08b
lda $c08b
JSR ASJMP
bit $c082
RTS
ASJMP JMP (DEVJMP) ; indirect jump to ROM entry
BRK
*
GETVECT EQU * ; |
TAY ;VECTOR INTO TABLE IN ACC ON ENTRY |
LDA DEVADRS01,Y ;GET LOW BYTE |
PHA ;SAVE IT |
LDA DEVADRS01+1,Y ;GET HI BYTE |
TAY ;SAVE IT IN Y |
PLA ;GET LO BYTE BACK |
RTS ; |
*
UNITLEFT DB 0 ; UNIT NUMBER
UNITRIGHT DB 0 ; reserve a byte for saving slot
DEVJMP DW 0 ; ADDRESS IN ROM
*
REP 50
*
* WRTBLK -- INCREMENTS THE BLOCK NUMBER AND WRITES
* CURRENT BUFFER TO THAT BLOCK
*
REP 50
*
WRTBLK EQU *
INC BLKNUM
JSR MLIENTRY
DB $81 ;BLOCK WRITE
DW PARMLIST
RTS
*
PARMLIST EQU * ;PARAMETER LIST FOR WRITING BLOCKS 2 AND UP
DB 3 ;PARM COUNT
UNITNUM3 DB 0
LBUFFPTR DW 0
BLKNUM DW 0
PAGE
REP 50
*
* ROOTBLKS - SETUP AND WRITE FORWARD & BACKWARD POINTERS
* INTO BLOCKS 3,4,5 OF ROOT DIRECTORY
*
REP 50
*
ROOTBLKS EQU *
JSR CLRBUFF ;CLEAR OUT BUFFER AREA
LDA #2 ;BACKWARD POINTER FOR BLOCK 3
LDX #4 ;FORWARD POINTER FOR BLOCK 3
JSR BF1 ;WRITE BLOCK 3 TO DISK
BCS BF2 ;ERR
LDA #3 ;BACKWARD POINTER FOR BLOCK 4
LDX #5 ;FORWARD POINTER FOR BLOCK 4
JSR BF1 ;WRITE BLK 4 TO DISK
BCS BF2 ;ERR
LDA #4 ;BACKWARD POINTER FOR BLOCK 5
LDX #0 ;FORWARD POINTER FOR BLOCK 5
BF1 LDY #0 ;POINT TO BACKWARD POINTER
STA (BUFFPTR),Y ;STORE BACKWARD PTR IN BUFFER
LDY #2 ;POINT TO FORWARD POINTER
TXA
STA (BUFFPTR),Y ;STORE FORWARD PTR IN BUFFER
JSR WRTBLK ;CALL MLI FOR WRITE TO DISK
BF2 RTS ;C=1 ERR ON WRITE ELSE OK
SBTL 'SETUP AND WRITE BITMAP'
REP 50
*
* CONVBLKS - CONVERT # OF BLOCKS ON DEVICE TO # OF
* BYTES TO SET IN BITMAP FOR NEWLY FORMATTED DISK.
*
* ENTER: TEMP = LO BLOCKS
* TEMP1 = HI BLOCKS
*
* EXIT: TEMP = LO BYTES
* TEMP1 = HI BYTES
* NBITS = EXTRA BITS
*
REP 50
*
CONVBLKS EQU *
LDA TEMP ; get low order # of blocks
AND #$07 ; put remainder of bits in NBITS
STA NBITS
LDA TEMP ; mask out low bits
AND #$F8 ; so that ROR's work
CLC ; clear carry for first time
LDX #3 ; slide bits down 3 places
CNV1 ROR TEMP1 ; slide top bits down
ROR A ; slide bottom bits down
DEX
BNE CNV1 ; go back and do more
STA TEMP ; put back lower bits
RTS
*
NBITS DB 0
PAGE
REP 50
*
* BITMAPS - SETUP AND WRITE BIT MAPS TO NEWLY FORMATTED
* DISKS. WORKS FOR ARBITRARY-SIZED VOLUMES.
*
* INPUTS:
* TEMP,TEMP1 -- word containing # blocks in device
*
* OUTPUTS:
* TEMP,TEMP1 -- destroyed
* CARRY -- 0 -> success
* 1 -> failure, code in accumulator
*
REP 50
*
BITMAPS EQU *
jsr convblks ;convert # blks to # of bytes & bits
LDA NBITS ;ANY EXTRA BITS?
BEQ BTMP1 ;BRANCH IF NOT
INC TEMP ;DO 1 MORE BYTE IN BITMAP
BNE BTMP1 ; IF THERE IS.
INC TEMP1
BTMP1 EQU *
lda temp1 ; hi byte of # of bytes in bit map
clc
ror A ; get # of blocks in bit map (#/$200)
bcs used ; if carry set, then need another bit
ldx temp ; did we end on even block boundary?
beq used ; branch if so (carry clear)
sec ; otherwise, set carry for another bit
used adc #6 ; add in # bits for root dir & boot blks
pha ; save # of bits to mark as used
LDA NBITS
BEQ BTMP2
DEC TEMP ;RESTORE # BYTES IN MAP TO # FULL BYTES
LDA TEMP
CMP #$FF
BNE BTMP2
DEC TEMP1
BTMP2 JSR CLRBUFF ;ZERO THE BUFFER
mapblock lda temp1 ; check # of bytes left TO DO
cmp #2 ; LESS THAN $200 BYTES to do?
bcc last ; go do last block if YES.
SBC #2 ;SET COUNT TO DO AT N-$200
STA TEMP1
jsr setfull ; set the full block with $FF's
pla ; get # of bits to mark used
jsr markused
jsr WRTBLK ; write this block of bit map out
bcs bterr ; branch if error during write
lda #0 ;# of bits to be marked as used next time
pha
beq BTMP2 ; always taken
last jsr CLRBUFF ; clear buffer first
lda temp1 ; 1 PAGE OR LESS?
beq last1 ;BRANCH IF YES
LDA #$FF
jsr WRTBITS ; set first page to $FF's
inc BUFFPTR+1 ; point to second page
LAST1 LDY TEMP ;ANY FULL BYTES ON THIS PG OF PARTIAL BLOCK?
BEQ LAST1.1 ;BRANCH IF NOT
jsr setCNT ; ELSE mark final partial block
LAST1.1 LDY TEMP
INY ;POINT TO BYTE AFTER TEMP
JSR EXTRAB ;GO DO EXTRA BITS
lda temp1 ; was it the in the 1st or 2nd page ?
beq marklast ; branch if 1st
dec BUFFPTR+1 ; fix BUFFPTR if we did 2nd page
marklast pla ; pull off # of bits to mark as used
jsr markused ; mark them used
jsr WRTBLK ; write out last block of bit map
rts ; return (with carry set if error)
*
markused equ * ; mark some bits as used at start of blk
ldy #0 ; point to beginning of buffer
markloop tax ; store # bits to mark in X
beq markrtn ; if no bits to mark as used, return
cpx #8 ; more than eight bits to mark?
bcc markpart ; branch if less than full byte
lda #0 ; zero out whole byte
sta (BUFFPTR),y
iny ; point to next byte in block
txa ; get # bits in accum
sec ; set carry for subtraction
sbc #8 ; subtract off bits just marked
bpl markloop ; always taken
markpart lda #$7F ; at least 1 bit gets cleared
partloop dex ; are we done?
beq partdone ; branch if so
clc ; otherwise, rotate in another clear bit
ror A
bcs partloop ; branch always
partdone sta (BUFFPTR),y
markrtn rts
*
bterr equ * ; return after error writing block
tax ; save error code in X
pla ; pull off extraneous byte from stack
txa ; get error code back
sec ; mark as error
rts
*
SETCNT EQU * ;SET # OF BYTES IN Y TO $FF
LDA #$FF
SETCNT1 DEY
STA (BUFFPTR),Y
BNE SETCNT1
RTS
*
extrab lda nbits ; write leftover bits
beq ex1 ; none left over
jsr getbits ; gives mask in acc, leaves Y intact
DEY
sta (BUFFPTR),y
ex1 rts
*
CLRBUFF equ * ; clear buffer area
lda #0 ; |
BEQ WRTB1 ; |
SETFULL LDA #$FF ;FILL BUFFER W/$FF |
WRTB1 jsr wrtbits ; write out bits of 00's OR $FF's |
inc BUFFPTR+1 ; set to 2nd page of buffer
jsr wrtbits
dec BUFFPTR+1 ; restore pointer
rts
wrtbits ldy #0
wrtb sta (BUFFPTR),Y
iny
bne wrtb
rts
*
REP 50
*
* GETBITS - GET BIT MASK FOR REMAINING BITS.
* USED IN FORMAT FOR SETTING BITS IN VOLUME
* BIT MAPS.
*
REP 50
*
GETBITS EQU * ;GET BIT MASK FOR REMAINING BYTE IN UIMEM
SEC
LDA #$08
SBC NBITS
BEQ ALLBITS
TAX
CPX #8
BEQ NOBITS
LDA #$FF
SHFBITS ASL A
DEX
BNE SHFBITS
BEQ SOMEBITS
ALLBITS LDA #$FF
SOMEBITS EQU *
RTS
NOBITS LDA #0
BEQ SOMEBITS
SBTL 'BOOT BLOCK 0 AND 1 CODE'
REP 50
*
* BOOT BLOCK 0 CODE
*
REP 50
*
BOOTZERO EQU * ;WRITTEN TO BLOCK 0
DFB $01,$38,$B0,$03,$4C,$32,$A1,$86
DFB $43,$C9,$03,$08,$8A,$29,$70,$4A
DFB $4A,$4A,$4A,$09,$C0,$85,$49,$A0
DFB $FF,$84,$48,$28,$C8,$B1,$48,$D0
DFB $3A,$B0,$0E,$A9,$03,$8D,$00,$08
DFB $E6,$3D,$A5,$49,$48,$A9,$5B,$48
DFB $60,$85,$40,$85,$48,$A0,$63,$B1
DFB $48,$99,$94,$09,$C8,$C0,$EB,$D0
DFB $F6,$A2,$06,$BC,$1D,$09,$BD,$24
DFB $09,$99,$F2,$09,$BD,$2B,$09,$9D
DFB $7F,$0A,$CA,$10,$EE,$A9,$09,$85
DFB $49,$A9,$86,$A0,$00,$C9,$F9,$B0
DFB $2F,$85,$48,$84,$60,$84,$4A,$84
DFB $4C,$84,$4E,$84,$47,$C8,$84,$42
DFB $C8,$84,$46,$A9,$0C,$85,$61,$85
DFB $4B,$20,$12,$09,$B0,$68,$E6,$61
DFB $E6,$61,$E6,$46,$A5,$46,$C9,$06
DFB $90,$EF,$AD,$00,$0C,$0D,$01,$0C
DFB $D0,$6D,$A9,$04,$D0,$02,$A5,$4A
DFB $18,$6D,$23,$0C,$A8,$90,$0D,$E6
DFB $4B,$A5,$4B,$4A,$B0,$06,$C9,$0A
DFB $F0,$55,$A0,$04,$84,$4A,$AD,$02
DFB $09,$29,$0F,$A8,$B1,$4A,$D9,$02
DFB $09,$D0,$DB,$88,$10,$F6,$29,$F0
DFB $C9,$20,$D0,$3B,$A0,$10,$B1,$4A
DFB $C9,$FF,$D0,$33,$C8,$B1,$4A,$85
DFB $46,$C8,$B1,$4A,$85,$47,$A9,$00
DFB $85,$4A,$A0,$1E,$84,$4B,$84,$61
DFB $C8,$84,$4D,$20,$12,$09,$B0,$17
DFB $E6,$61,$E6,$61,$A4,$4E,$E6,$4E
DFB $B1,$4A,$85,$46,$B1,$4C,$85,$47
DFB $11,$4A,$D0,$E7,$4C,$00,$20,$4C
DFB $3F,$09,$26,$50,$52,$4F,$44,$4F
DFB $53,$20,$20,$20,$20,$20,$20,$20
DFB $20,$20,$A5,$60,$85,$44,$A5,$61
DFB $85,$45,$6C,$48,$00,$08,$1E,$24
DFB $3F,$45,$47,$76,$F4,$D7,$D1,$B6
DFB $4B,$B4,$AC,$A6,$2B,$18,$60,$4C
DFB $BC,$09,$A9,$9F,$48,$A9,$FF,$48
DFB $A9,$01,$A2,$00,$4C,$79,$F4,$20
DFB $58,$FC,$A0,$1C,$B9,$50,$09,$99
DFB $AE,$05,$88,$10,$F7,$4C,$4D,$09
DFB $AA,$AA,$AA,$A0,$D5,$CE,$C1,$C2
DFB $CC,$C5,$A0,$D4,$CF,$A0,$CC,$CF
DFB $C1,$C4,$A0,$D0,$D2,$CF,$C4,$CF
DFB $D3,$A0,$AA,$AA,$AA,$A5,$53,$29
DFB $03,$2A,$05,$2B,$AA,$BD,$80,$C0
DFB $A9,$2C,$A2,$11,$CA,$D0,$FD,$E9
DFB $01,$D0,$F7,$A6,$2B,$60,$A5,$46
DFB $29,$07,$C9,$04,$29,$03,$08,$0A
DFB $28,$2A,$85,$3D,$A5,$47,$4A,$A5
DFB $46,$6A,$4A,$4A,$85,$41,$0A,$85
DFB $51,$A5,$45,$85,$27,$A6,$2B,$BD
DFB $89,$C0,$20,$BC,$09,$E6,$27,$E6
DFB $3D,$E6,$3D,$B0,$03,$20,$BC,$09
DFB $BC,$88,$C0,$60,$A5,$40,$0A,$85
DFB $53,$A9,$00,$85,$54,$A5,$53,$85
DFB $50,$38,$E5,$51,$F0,$14,$B0,$04
DFB $E6,$53,$90,$02,$C6,$53,$38,$20
DFB $6D,$09,$A5,$50,$18,$20,$6F,$09
DFB $D0,$E3,$A0,$7F,$84,$52,$08,$28
DFB $38,$C6,$52,$F0,$CE,$18,$08,$88
DFB $F0,$F5,$BD,$8C,$C0,$10,$FB,$00
DFB $00,$00,$00,$00,$00,$00,$00,$00
PAGE
REP 50
*
* BOOT BLOCK 1 CODE
*
REP 50
*
BOOTONE EQU * ;WRITTEN TO BLOCK 1
DFB $4C,$6E,$A0,$53,$4F,$53,$20,$42
DFB $4F,$4F,$54,$20,$20,$31,$2E,$31
DFB $20,$0A,$53,$4F,$53,$2E,$4B,$45
DFB $52,$4E,$45,$4C,$20,$20,$20,$20
DFB $20,$53,$4F,$53,$20,$4B,$52,$4E
DFB $4C,$49,$2F,$4F,$20,$45,$52,$52
DFB $4F,$52,$08,$00,$46,$49,$4C,$45
DFB $20,$27,$53,$4F,$53,$2E,$4B,$45
DFB $52,$4E,$45,$4C,$27,$20,$4E,$4F
DFB $54,$20,$46,$4F,$55,$4E,$44,$25
DFB $00,$49,$4E,$56,$41,$4C,$49,$44
DFB $20,$4B,$45,$52,$4E,$45,$4C,$20
DFB $46,$49,$4C,$45,$3A,$00,$00,$0C
DFB $00,$1E,$0E,$1E,$04,$A4,$78,$D8
DFB $A9,$77,$8D,$DF,$FF,$A2,$FB,$9A
DFB $2C,$10,$C0,$A9,$40,$8D,$CA,$FF
DFB $A9,$07,$8D,$EF,$FF,$A2,$00,$CE
DFB $EF,$FF,$8E,$00,$20,$AD,$00,$20
DFB $D0,$F5,$A9,$01,$85,$E0,$A9,$00
DFB $85,$E1,$A9,$00,$85,$85,$A9,$A2
DFB $85,$86,$20,$BE,$A1,$E6,$E0,$A9
DFB $00,$85,$E6,$E6,$86,$E6,$86,$E6
DFB $E6,$20,$BE,$A1,$A0,$02,$B1,$85
DFB $85,$E0,$C8,$B1,$85,$85,$E1,$D0
DFB $EA,$A5,$E0,$D0,$E6,$AD,$6C,$A0
DFB $85,$E2,$AD,$6D,$A0,$85,$E3,$18
DFB $A5,$E3,$69,$02,$85,$E5,$38,$A5
DFB $E2,$ED,$23,$A4,$85,$E4,$A5,$E5
DFB $E9,$00,$85,$E5,$A0,$00,$B1,$E2
DFB $29,$0F,$CD,$11,$A0,$D0,$21,$A8
DFB $B1,$E2,$D9,$11,$A0,$D0,$19,$88
DFB $D0,$F6,$A0,$00,$B1,$E2,$29,$F0
DFB $C9,$20,$F0,$3E,$C9,$F0,$F0,$08
DFB $AE,$64,$A0,$A0,$13,$4C,$D4,$A1
DFB $18,$A5,$E2,$6D,$23,$A4,$85,$E2
DFB $A5,$E3,$69,$00,$85,$E3,$A5,$E4
DFB $C5,$E2,$A5,$E5,$E5,$E3,$B0,$BC
DFB $18,$A5,$E4,$6D,$23,$A4,$85,$E2
DFB $A5,$E5,$69,$00,$85,$E3,$C6,$E6
DFB $D0,$95,$AE,$4F,$A0,$A0,$1B,$4C
DFB $D4,$A1,$A0,$11,$B1,$E2,$85,$E0
DFB $C8,$B1,$E2,$85,$E1,$AD,$66,$A0
DFB $85,$85,$AD,$67,$A0,$85,$86,$20
DFB $BE,$A1,$AD,$68,$A0,$85,$85,$AD
DFB $69,$A0,$85,$86,$AD,$00,$0C,$85
DFB $E0,$AD,$00,$0D,$85,$E1,$20,$BE
DFB $A1,$A2,$07,$BD,$00,$1E,$DD,$21
DFB $A0,$F0,$08,$AE,$64,$A0,$A0,$13
DFB $4C,$D4,$A1,$CA,$10,$ED,$A9,$00
DFB $85,$E7,$E6,$E7,$E6,$86,$E6,$86
DFB $A6,$E7,$BD,$00,$0C,$85,$E0,$BD
DFB $00,$0D,$85,$E1,$A5,$E0,$D0,$04
DFB $A5,$E1,$F0,$06,$20,$BE,$A1,$4C
DFB $8A,$A1,$18,$AD,$6A,$A0,$6D,$08
DFB $1E,$85,$E8,$AD,$6B,$A0,$6D,$09
DFB $1E,$85,$E9,$6C,$E8,$00,$A9,$01
DFB $85,$87,$A5,$E0,$A6,$E1,$20,$79
DFB $F4,$B0,$01,$60,$AE,$32,$A0,$A0
DFB $09,$4C,$D4,$A1,$84,$E7,$38,$A9
DFB $28,$E5,$E7,$4A,$18,$65,$E7,$A8
DFB $BD,$29,$A0,$99,$A7,$05,$CA,$88
DFB $C6,$E7,$D0,$F4,$AD,$40,$C0,$4C
DFB $EF,$A1,$00,$00,$00,$00,$00,$00
DFB $00,$00,$00,$00,$00,$00,$00,$00
DFB $00,$00,$03,$00,$F6,$50,$52,$4F
loctemp dfb 0
locbuff ds $E,0
ZBDEND EQU *
poslo equ >ZBDEND ;extract lowbyte of current pc
ZBDLEN EQU ZBDEND-BUILDDISK ;length of Buildisk, less formatter
ds $100-poslo ;fill to next page boundry
sbtl 'Disk II FORMATTER'
page
FORMATTII equ * ;here is the diskII formatter.
*
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * *
* * M U S T B E O N P A G E B O U N D A R Y * *
* * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* *
* ProDOS DISK ][ Formatter Device Driver *
* *
* Copyright Apple Computer, Inc., 1982-1984 *
* *
* Enter with ProDOS device number in A-register: *
* Zero = bits 0, 1, 2, 3 *
* Slot No.= bits 4, 5, 6 *
* Drive 1 = bit 7 off *
* Drive 2 = bit 7 on *
* *
* Error codes returned in A-register: *
* $00 : Good completion *
* $27 : Unable to format *
* $2B : Write-Protected *
* $33 : Drive too SLOW *
* $34 : Drive too FAST *
* NOTE: Carry flag is set if error occured. *
* *
* Uses zero page locations $D0 thru $DD *
* *
* - - - - - - - - - - - - - - - - - - - - - - - - - - *
* Modified 15 December 1983 to disable interrupts *
* Modified 20 December 1983 to increase tolerance *
* of disk speed check *
* Modified 30 March 1983 to increase tolerance of *
* disk speed *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
PHP
SEI
JSR *+$38
PLP
CMP #$00
BNE *+$04
CLC
RTS
CMP #$02
BNE *+$07
LDA #$2B
JMP *+$0F
CMP #$01
BNE *+$07
LDA #$27
JMP *+$06
CLC
ADC #$30
SEC
RTS
ASL A
ASL *+$400
STA *+$40F
TXA
LSR A
LSR A
LSR A
LSR A
TAY
LDA *+$406
JSR *+$193
LSR *+$3EE
RTS
TAX
AND #$70
STA *+$3E6
TXA
LDX *+$3E2
ROL A
LDA #$00
ROL A
BNE *+$08
LDA $C08A,X
JMP *+$06
LDA $C08B,X
LDA $C089,X
LDA #$D7
STA $DA
LDA #$50
STA *+$3C8
LDA #$00
JSR *-$3E
LDA $DA
BEQ *+$08
JSR *+$2D2
JMP *-$07
LDA #$01
STA $D3
LDA #$AA
STA $D0
LDA *+$3AA
CLC
ADC #$02
STA $D4
LDA #$00
STA $D1
LDA $D1
LDX *+$39F
JSR *-$64
LDX *+$399
LDA $C08D,X
LDA $C08E,X
TAY
LDA $C08E,X
LDA $C08C,X
TYA
BPL *+$07
LDA #$02
JMP *+$5A
JSR *+$2C1
BCC *+$10
LDA #$01
LDY $D4
CPY *+$374
BCS *+$04
LDA #$04
JMP *+$47
LDY $D4
CPY *+$368
BCS *+$07
LDA #$04
JMP *+$3B
CPY *+$35F
BCC *+$07
LDA #$03
JMP *+$31
LDA *+$357
STA *+$357
DEC *+$354
BNE *+$07
LDA #$01
JMP *+$21
LDX *+$348
JSR *+$8C
BCS *-$10
LDA $D8
BNE *-$14
LDX *+$33C
JSR *+$1D
BCS *-$1C
INC $D1
LDA $D1
CMP #$23
BCC *-$73
LDA #$00
PHA
LDX *+$329
LDA $C088,X
LDA #$00
JSR *-$DF
PLA
RTS
LDY #$20
DEY
BEQ *+$5E
LDA $C08C,X
BPL *-$03
EOR #$D5
BNE *-$0A
NOP
LDA $C08C,X
BPL *-$03
CMP #$AA
BNE *-$0C
LDY #$56
LDA $C08C,X
BPL *-$03
CMP #$AD
BNE *-$17
LDA #$00
DEY
STY $D5
LDA $C08C,X
BPL *-$03
CMP #$96
BNE *+$32
LDY $D5
BNE *-$0E
STY $D5
LDA $C08C,X
BPL *-$03
CMP #$96
BNE *+$23
LDY $D5
INY
BNE *-$0E
LDA $C08C,X
BPL *-$03
CMP #$96
BNE *+$15
LDA $C08C,X
BPL *-$03
CMP #$DE
BNE *+$0C
NOP
LDA $C08C,X
BPL *-$03
CMP #$AA
BEQ *+$5E
SEC
RTS
LDY #$FC
STY $DC
INY
BNE *+$06
INC $DC
BEQ *-$0B
LDA $C08C,X
BPL *-$03
CMP #$D5
BNE *-$0E
NOP
LDA $C08C,X
BPL *-$03
CMP #$AA
BNE *-$0C
LDY #$03
LDA $C08C,X
BPL *-$03
CMP #$96
BNE *-$17
LDA #$00
STA $DB
LDA $C08C,X
BPL *-$03
ROL A
STA $DD
LDA $C08C,X
BPL *-$03
AND $DD
STA $D7,Y
EOR $DB
DEY
BPL *-$17
TAY
BNE *-$47
LDA $C08C,X
BPL *-$03
CMP #$DE
BNE *-$50
NOP
LDA $C08C,X
BPL *-$03
CMP #$AA
BNE *-$5A
CLC
RTS
STX *+$271
STA *+$26D
CMP *+$258
BEQ *+$5E
LDA #$00
STA *+$265
LDA *+$24E
STA *+$260
SEC
SBC *+$259
BEQ *+$39
BCS *+$09
EOR #$FF
INC *+$23E
BCC *+$07
ADC #$FE
DEC *+$237
CMP *+$248
BCC *+$05
LDA *+$243
CMP #$0C
BCS *+$03
TAY
SEC
JSR *+$1F
LDA *+$14A,Y
JSR *+$136
LDA *+$232
CLC
JSR *+$15
LDA *+$149,Y
JSR *+$129
INC *+$224
BNE *-$41
JSR *+$121
CLC
LDA *+$207
AND #$03
ROL A
ORA *+$214
TAX
LDA $C080,X
LDX *+$20D
RTS
JSR *+$1E0
LDA $C08D,X
LDA $C08E,X
LDA #$FF
STA $C08F,X
CMP $C08C,X
PHA
PLA
NOP
LDY #$04
PHA
PLA
JSR *+$5F
DEY
BNE *-$06
LDA #$D5
JSR *+$56
LDA #$AA
JSR *+$51
LDA #$AD
JSR *+$4C
LDY #$56
NOP
NOP
NOP
BNE *+$05
JSR *+$1AC
NOP
NOP
LDA #$96
STA $C08D,X
CMP $C08C,X
DEY
BNE *-$0E
BIT $00
NOP
JSR *+$199
LDA #$96
STA $C08D,X
CMP $C08C,X
LDA #$96
NOP
INY
BNE *-$0F
JSR *+$1E
LDA #$DE
JSR *+$19
LDA #$AA
JSR *+$14
LDA #$EB
JSR *+$0F
LDA #$FF
JSR *+$0A
LDA $C08E,X
LDA $C08C,X
RTS
NOP
PHA
PLA
STA $C08D,X
CMP $C08C,X
RTS
SEC
LDA $C08D,X
LDA $C08E,X
BMI *+$60
LDA #$FF
STA $C08F,X
CMP $C08C,X
PHA
PLA
JSR *+$5A
JSR *+$57
STA $C08D,X
CMP $C08C,X
NOP
DEY
BNE *-$0E
LDA #$D5
JSR *+$5A
LDA #$AA
JSR *+$55
LDA #$96
JSR *+$50
LDA $D3
JSR *+$3A
LDA $D1
JSR *+$35
LDA $D2
JSR *+$30
LDA $D3
EOR $D1
EOR $D2
PHA
LSR A
ORA $D0
STA $C08D,X
LDA $C08C,X
PLA
ORA #$AA
JSR *+$2A
LDA #$DE
JSR *+$26
LDA #$AA
JSR *+$21
LDA #$EB
JSR *+$1C
CLC
LDA $C08E,X
LDA $C08C,X
RTS
PHA
LSR A
ORA $D0
STA $C08D,X
CMP $C08C,X
PLA
NOP
NOP
NOP
ORA #$AA
NOP
NOP
PHA
PLA
STA $C08D,X
CMP $C08C,X
RTS
BRK
BRK
BRK
LDX #$11
DEX
BNE *-$01
INC $D9
BNE *+$04
INC $DA
SEC
SBC #$01
BNE *-$0E
RTS
DFB $01,$30,$28
DFB $24,$20,$1E
DFB $1D,$1C,$1C
DFB $1C,$1C,$1C
DFB $70,$2C,$26
DFB $22,$1F,$1E
DFB $1D,$1C,$1C
DFB $1C,$1C,$1C
LDA *+$BE
STA $D6
LDY #$80
LDA #$00
STA $D2
JMP *+$05
LDY $D4
LDX *+$B0
JSR *-$C8
BCC *+$05
JMP *+$93
LDX *+$A5
JSR *-$153
INC $D2
LDA $D2
CMP #$10
BCC *-$19
LDY #$0F
STY $D2
LDA *+$92
STA *+$92
STA *+$90,Y
DEY
BPL *-$04
LDA $D4
SEC
SBC #$05
TAY
JSR *+$6C
JSR *+$69
PHA
PLA
NOP
NOP
DEY
BNE *-$0B
LDX *+$74
JSR *-$248
BCS *+$3E
LDA $D8
BEQ *+$15
DEC $D4
LDA $D4
CMP *+$60
BCS *+$31
SEC
RTS
LDX *+$5D
JSR *-$25F
BCS *+$1C
LDX *+$55
JSR *-$2CA
BCS *+$14
LDY $D8
LDA *+$4E,Y
BMI *+$0D
LDA #$FF
STA *+$47,Y
DEC $D2
BPL *-$1E
CLC
RTS
DEC *+$3D
BNE *-$25
DEC $D6
BNE *+$04
SEC
RTS
LDA *+$2F
ASL A
STA *+$2E
LDX *+$29
JSR *-$293
BCS *+$08
LDA $D8
CMP #$0F
BEQ *+$09
DEC *+$1D
BNE *-$11
SEC
RTS
LDX #$D6
JSR *-$03
JSR *-$06
BIT $00
DEX
BNE *-$09
JMP *-$B4
DFB $0E,$1B,$03
DFB $10,$00,$00
DFB $00,$00,$00
DFB $00,$00,$00
DFB $00,$00,$00
DFB $00,$00,$00
DFB $00,$00,$00
DFB $00,$00,$00
DFB $00,$00,$00
Zend equ *
Ztotal equ Zend-Builddisk
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