PR#3 PREFIX /A2OSX.BUILD NEW INC 1 AUTO 6 .LIST OFF .OP 65C02 .OR $2000 .TF /A2OSX.BUILD/LIB/LIBBLKDEV.O *-------------------------------------- .INB /A2OSX.BUILD/INC/MACROS.I .INB /A2OSX.BUILD/INC/A2OSX.I .INB /A2OSX.BUILD/INC/PRODOS.I .INB /A2OSX.BUILD/INC/LIBBLKDEV.I *-------------------------------------- * NIBBLE track len = $1A00 (6656) bytes: * *-------------------------------------- GAP1 .EQ 48 GAP2 .EQ 6 GAP3 .EQ 27 *-------------------------------------- Status.PrvDrvOff .EQ $80 Waiting old drive stop spining Status.DrvOn .EQ $81 Waiting target drive spin Status.seek .EQ $82 targetdrive seeking *-------------------------------------- D2Ph0Off .EQ $C080 D2Ph0On .EQ $C081 D2Ph1Off .EQ $C082 D2Ph1On .EQ $C083 D2Ph2Off .EQ $C084 D2Ph2On .EQ $C085 D2Ph3Off .EQ $C086 D2Ph3On .EQ $C087 D2DrvOff .EQ $C088 D2DrvOn .EQ $C089 D2DrvSel1 .EQ $C08A D2DrvSel2 .EQ $C08B D2WShift .EQ $C08C W D2WLoad .EQ $C08D W D2RData .EQ $C08C R D2ReadProt .EQ $C08D R D2ReadMode .EQ $C08E R D2WriteMode .EQ $C08F W *-------------------------------------- ZPPtr1 .EQ ZPLIB ZPPtr2 .EQ ZPLIB+2 ZPPtr3 .EQ ZPLIB+4 *-------------------------------------- * File Header (16 Bytes) *-------------------------------------- CS.START cld jmp (.1,x) .DA #$61 6502,Level 1 (65c02) .DA #1 BIN Layout Version 1 .DA 0 .DA CS.END-CS.START .DA 0 .DA 0 .DA 0 *-------------------------------------- * Relocation Table *-------------------------------------- .1 .DA LIB.LOAD .DA LIB.UNLOAD .DA GetProDOSCatSize .DA BuildProDOSCat .DA D2TrkR16s .DA D2TrkRNIB .DA D2TrkW16s .DA D2TrkWNIB L.TrkWriter .DA TrkWriter L.ProDOS.Boot .DA ProDOS.Boot .DA 0 */-------------------------------------- * #GetProDOSCatSize * Compute space needed for ProDOS Catalog * ##In : * PUSHW = DevSize (in 512b blocks) * ##Out : * X=BlockCount (max 22) * A=PageCount (max 44) *\-------------------------------------- GetProDOSCatSize >PULLAX A=DevSizeLo GetProDOSCatSizeAX clc for now, no partial bitmap blk to add tay DevSize is xxxxxxxx00000000 ? beq .1 sec .1 txa Get DevSizeHI bit #$0f DevSize is xxxx000000000000 ? beq .2 sec .2 php lsr lsr lsr lsr plp adc #6 at least, 1(ProDOS)+1(SOS)+4(VolDir) tax X = Total blocks needed for header (used) asl A = Total pages needed to build catalog. rts */-------------------------------------- * #BuildProDOSCat * ##In : * PUSHW = DevSize (in 512b blocks) * PUSHW = VolName (PSTR) * PUSHW = DstBuf (Zero filled) * Blk0 : ProDOS.BootBlk * Blk1 : SOS.BootBlk * Blk2,3,4,5 : Volume Directory * Blk6.... : Volume Bitmap (4096/Blk) * max devSize = 65535 -> max 16 Bitmap Blk * absolute MAX DstBuf size= * 7 for Disk II(280blk),3.5(1600),3.5HD(2880) * 22 for 32mb Hardisk... *\-------------------------------------- BuildProDOSCat >PULLW ZPPtr1 DstBuf >PULLW ZPPtr2 VolName >PULLW VolDirHdr.TB ldx #3 .10 lda DATELO,x sta VolDirHdr.CT,x dex bpl .10 * Boot Code >LDYA L.ProDOS.Boot >STYA ZPPtr3 ldy #0 .1 lda (ZPPtr3),y sta (ZPPtr1),y iny bne .1 inc ZPPtr3 inc ZPPtr1 .2 lda (ZPPtr3),y sta (ZPPtr1),y iny bne .2 inc ZPPtr1 Blk 1 inc ZPPtr1 inc ZPPtr1 Blk 2 * Directory Blocks lda (ZPPtr2) VolName Len and #$0f make sure 15 bytes max tay ora #$F0 Volume Directory Header sta VolDirHdr.Name .3 lda (ZPPtr2),y sta VolDirHdr.Name,y dey bpl .3 ldy #VolDirHdr.size .4 lda VolDirHdr,y sta (ZPPtr1),y dey bpl .4 inc ZPPtr1 inc ZPPtr1 Blk 3 lda #2 sta (ZPPtr1) lda #4 ldy #2 sta (ZPPtr1),y inc ZPPtr1 inc ZPPtr1 Blk 4 lda #3 sta (ZPPtr1) lda #5 ldy #2 sta (ZPPtr1),y inc ZPPtr1 inc ZPPtr1 Blk 5 lda #4 sta (ZPPtr1) inc ZPPtr1 inc ZPPtr1 Blk 6 * BitMap Blocks : 0=Used 1=free >LDAX VolDirHdr.TB+1 jsr GetProDOSCatSizeAX X=blk used for boot/dir/bitmap lda VolDirHdr.TB eor #$ff sta Count lda VolDirHdr.TB+1 eor #$ff sta Count+1 txa clc adc VolDirHdr.TB sta VolDirHdr.TB bcc .51 inc Count+1 .51 ldy #0 .5 lda #%10000000 .6 dex bmi .8 asl bne .6 iny bne .5 .7 lda #%10000000 .8 inc Count bne .81 inc Count+1 beq .88 .81 pha eor (ZPPtr1),y sta (ZPPtr1),y pla asl bne .8 iny bne .7 inc ZPPtr1+1 bra .7 .88 rts */-------------------------------------- *\-------------------------------------- D2TrkRNIB */-------------------------------------- *\-------------------------------------- D2TrkR16s */-------------------------------------- * #TrkW16s * Write a track (16 sectors) * ##In: * PUSHW = Ptr to 16*256 buffer * PUSHB = TrackNum * 4 : 0->140+ * PUSHB = DSSS0000 * ##Out: * CC : success * CS : A = Error * A=0, currently starting/seeking... *\-------------------------------------- D2TrkW16s clc rts */-------------------------------------- * #TrkWNIB * Write a track (NIBBLE) * ##In: * PUSHW = Ptr to NIBBLE buffer (0 ended) * PUSHB = TrackNum * 4 : 0->140+ * PUSHB = DSSS0000 * ##Out: * CC : success * CS : A = Error * A=0, currently starting/seeking... *\-------------------------------------- D2TrkWNIB >PULLB DrvSlt >PULLB TrkNum >PULLW ZPPtr1 lda Status Lib is busy....? beq .10 lda DrvSlt cmp DrvSltInUse resume previous access ? .10 lda DEVNUM last drive accessed by ProDOS and #$F0 only DSSS pha jsr CheckDiskII was it a DISK II ? bcs .1 no, no need to check if spinning pla pha jsr DrvSpinCheck bcc .1 not spinning....continue pla sta D2DrvOff,x lda #Status.PrvDrvOff jmp SetStatusAndExit .1 pla cmp DrvSlt * beq lda DrvSlt jsr DrvTrkSelect bcs .9 ldy #TrkWriter.Size .7 lda TrkWriter,y sta UsrBuf256,y dey bne .7 jmp UsrBuf256 clc .9 rts *-------------------------------------- SetStatusAndExit sta Status ldy DrvSlt sty DrvSltInUse clc rts *-------------------------------------- LIB.LOAD LIB.UNLOAD clc rts *-------------------------------------- * A=DSSS0000 * Y=target Track Number * 4 *-------------------------------------- DrvTrkSelect jsr DrvSelect *-------------------------------------- * A=DSSS0000 *-------------------------------------- CheckDiskII and #$70 only 0SSS lsr lsr lsr ora #$C0 make Cn sta .2+2 ldx #3 4 bytes to check .1 ldy DiskII.OFS,x .2 lda $C000,y Self Modified cmp DiskII.SIG,x bne .9 dex bpl .1 clc all bytes match, Disk II rts .9 sec rts *-------------------------------------- * A=DSSS0000 *-------------------------------------- DrvSpinCheck jsr DrvSelect ldy #0 lda D2RData,x .1 cmp D2RData,x bne .8 spinning dey bne .1 clc CC:not spinning rts .8 sec rts *-------------------------------------- * A=DSSS0000 *-------------------------------------- DrvSelect pha and #$70 tax pla asl adc #D2DrvSel1 sta .1+1 .1 lda D2DrvSel1,x Drv 1/2 select lda D2ReadMode,x Make sure readmode rts *-------------------------------------- CS.END DiskII.OFS .HS 010305FF DiskII.SIG .HS 20000300 DrvSlt .BS 1 TrkNum .BS 1 *-------------------------------------- Status .BS 1 DrvSltInUse .BS 1 Count .BS 2 *-------------------------------------- * TrkWriter * X = Slot Cn * ZPPtr1 = Ptr To NibbleBuf *-------------------------------------- TrkWriter .PH $200 TrkWriter.Start lda D2ReadMode,x lda D2ReadProt,x bmi .9 Write protected php sei ldy #0 .1 lda (ZPPtr1),y (5) as NibbleBuf is page alligned, no page crossing beq .8 (2)(3 if Z) END OF TRACK * nobody will never try to write 00000000, right? cmp #$80 (2) if CC, it is a sync byte ora #$80 (2) make sure Bit7 high sta D2WriteMode,x (5) ora D2WShift,x (4) keep C unmodified iny (2) bne .2 (2)(3 if nz) inc ZPPtr1+1 (5) bcs .1 (2)(3 if cs) regular 32us byte * 32us Byte,next page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 3 (bcs succeeded) = 32 nop (2) Sync 40us byte : add 8 cycles nop (2) nop (2) bra .1 (3) * 40us Byte,next page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 2 (bcs failed) +2+2+2+3 = 40 .2 nop (2) nop (2) bcs .1 (2)(3 if cs) regular 32us byte * 32us Byte,same page : 5+2 (beq failed) +2+2+5+4+2+3 (bne succeeded) + 2 +2 + 3 (bcs succeeded) = 32 nop (2) Sync 40us byte : add 8 cycles nop (2) nop (2) bra .1 (3) * 40us Byte,same page : 5+2 (beq failed) +2+2+5+4+2+2 (bne failed) + 5 + 2 (bcs failed) +2+2+2+3 = 40 .8 pha (3) make sure 32us elapsed before switching to read mode (beq(3)+pha(3)=beq(2)+cmp(2)+ora(2)) lda D2ReadMode,x close write mode lda D2RData,x pla from pha (3) plp clc rts .9 lda #$2B Write Protected sec rts TrkWriter.Size .EQ *-TrkWriter.Start .EP *-------------------------------------- ProDOS.Boot .BS 512 *-------------------------------------- VolDirHdr .DA 0 pointer to previous block .DA 3 pointer to next block VolDirHdr.Name .BS 16 .HS 0000000000000000 VolDirHdr.CT .BS 4 Creation time .HS 0100C3270D version/min version/access/EL/EPB .DA 0 File Count .DA 6 bitmap pointer (Block 2..5 are Volume directory) VolDirHdr.TB .BS 2 Total Blocks VolDirHdr.size .EQ *-VolDirHdr *-------------------------------------- MAN SAVE LIB/LIBBLKDEV.S ASM