NEW AUTO 3,1 *-------------------------------------- FCB.MAX .EQ 8 FCB.ID .EQ 0 FCB.DEVID .EQ 1 d_dev -> d_dev+5 FCB.DIRHBLK .EQ 2 2 bytes FCB.DIREBLK .EQ 4 2 bytes FCB.DIRENUM .EQ 6 FCB.STYPE .EQ 7 FCB.F .EQ 8 FCB.F.STMOD .EQ %00001000 FCB.F.UMOD .EQ %00010000 FCB.F.DBLKMOD .EQ %01000000 FCB.F.IBLKMOD .EQ %10000000 FCB.ACCESS .EQ 9 FCB.NLBYTE .EQ 10 FCB.BUFID .EQ 11 FCB.1stBLK .EQ 12 2 bytes FCB.IBLK .EQ 14 2 bytes FCB.DBLK .EQ 16 2 bytes FCB.MARK .EQ 18 3 bytes FCB.EOF .EQ 21 3 bytes FCB.UBLK .EQ 24 2 bytes FCB.FLEVEL .EQ 27 FCB.DIRTY .EQ 28 FCB.NLMASK .EQ 31 * FCB .EQ 32 *-------------------------------------- VCB.DEV .EQ 16 VCB.OFCNT .EQ 17 VCB.BMAP .EQ 18 2 bytes VCB.TBLK .EQ 20 2 bytes VCB.FBLK .EQ 22 2 bytes VCB.BMAPIDX .EQ 24 * VCB .EQ 25 *-------------------------------------- XDOS.VCBPtr .EQ XDOS.VCBs+0 XDOS.VCBDupFlag .EQ XDOS.VCBs+1 XDOS.VCBDupEnt .EQ XDOS.VCBs+2 bmcnt .EQ XDOS.VCBs+3 bmptr .EQ XDOS.VCBs+4 basval .EQ XDOS.VCBs+5 XDOS.VCB0 .EQ XDOS.VCBs+6 range $D906-$DA00 *-------------------------------------- * ZERO Page *-------------------------------------- zpt .EQ $48 highly used zero page index pointer datptr .EQ $4A ptr to data area of buffer. sos .EQ $4C sos buffer pointer. usrbuf .EQ $4E data ptr in user buffer. *-------------------------------------- XDOS.START .PH XDOS .DO AUXLC=0 XDOS.MAIN cld no decimal. sty GP.MLIY save x and y stx GP.MLIX ply get processor status pla find out the address of the caller sta ZP.A3L clc preserve the address of the call spec. adc #$04 sta GP.MLIRTN last MLI call return address pla sta ZP.A3L+1 adc #$00 sta GP.MLIRTN+1 phy pull processor status .ELSE XDOS.AUX cld bit IO.RRAMWRAMBNK1 sty GP.BNKBYT2 stx GP.MLIEXIT.X+1 tsx stx $100 ldx $101 txs sec ror GP.MLIACTV pha lda GP.MLIEXIT.PCL+1 sta ZP.A3L clc adc #$04 sta GP.MLIEXIT.PCL+1 lda GP.MLIEXIT.PCH+1 sta ZP.A3L+1 adc #$00 sta GP.MLIEXIT.PCH+1 .FIN *-------------------------------------- plp to re-enable interrupts. cld still no decimal stz GP.ERROR clear any previous errors. ldy #$01 find out if command is valid. lda (ZP.A3L),y get command # lsr and hash it to a range of 0-$1F lsr lsr lsr clc adc (ZP.A3L),y and #$1F tax lda (ZP.A3L),y check result to see if valid command # cmp XDOS.CmdNums,x bne XDOS.BadCall iny index to call spec parm list. lda (ZP.A3L),y make A3L point to parameter count byte pha in parameter block. iny lda (ZP.A3L),y sta ZP.A3L+1 pla sta ZP.A3L lda XDOS.ParamCnt,x make sure parameter list has the correct # of parameters. beq .2 clock has 0 parameters. cmp (ZP.A3L) bne XDOS.BadCnt error if wrong count. lda XDOS.CmdNums,x get call # again cmp #MLI.QUIT is it quit? beq .1 if so, then call quit dispatcher asl carry set if BFMgr or DevMgr bpl .3 bcs .4 lsr shift back down for interrupt manager and #$03 valid calls are 0 and 1 jsr XDOS.IntMgr bra XDOS.Exit .1 jmp GP.DISPATCH P8 system death vector .2 jsr GP.CLOCK go read clock. bra XDOS.Exit no errors possible .3 lsr shift back down for device manager. adc #$01 valid commands are 1 and 2. sta ZP.CMDNUM jsr XDOS.DevMgr execute read or write request. bra XDOS.Exit .4 lsr shift back down for block file manager. and #$1F valid commands are 0-$13 tax jsr XDOS.BFMgr *-------------------------------------- XDOS.Exit stz GP.BUBIT clear backup bit ldy GP.ERROR P8 error code cpy #$01 if > 0 then set C tya and set Z php disable interrupts until exit complete. sei lsr GP.MLIACTV indicate MLI done. ply Get status register until return. * Y = Status register * A = MLI Error code .DO AUXLC=0 ldx GP.MLIRTN+1 place last MLI call return address phx on stack. return is done via 'rti' ldx GP.MLIRTN so the status register is restored phx at the same time, so phy place status back on stack pha Push return error, if any. ldx GP.MLIX MLI X register savearea ldy GP.MLIY MLI Y register savearea lda GP.BNKBYT1 restore language card status jmp GP.MLIEXIT and return. .ELSE tsx stx $101 ldx $100 txs jmp GP.MLIEXITX .FIN *-------------------------------------- XDOS.NoDevice lda #MLI.E.NODEV no device connected. jsr GP.SYSERR XDOS.BadCall lda #MLI.E.BADCALL .HS 2C BIT ABS XDOS.BadCnt lda #MLI.E.BADCNT jsr XDOS.GoSysErr bra XDOS.Exit *-------------------------------------- * ProDOS Device Manager *-------------------------------------- XDOS.DevMgr ldy #$05 the call spec for devices must .1 lda (ZP.A3L),y be passed to drivers in page zero: sta ZP.CMDNUM,y dey bne .1 ldx ZP.BUFPTR+1 buffer page stx usrbuf+1 to user buffer inx inx lda ZP.BUFPTR is buffer page aligned (nn00) ? beq .2 branch if it is inx else account for 3-page straddle .2 jsr vldbuf1 make sure user buffer is not bcs XDOS.GoSysErr conflicting with protected ram. jsr XDOS.DevCall call internal entry for device dispatch bcc XDOS.DevCall.RTS XDOS.GoSysErr jsr GP.SYSERR *-------------------------------------- XDOS.DevCall php do not allow interrupts. sei lda ZP.UNITNUM get device # and and #$F0 strip misc lower nibble sta ZP.UNITNUM then save it. lsr use as index to device table lsr lsr tax jsr XDOS.DevCall.Jmp bit IO.CLRC8ROM RELEASE $C800-$CFFF ROM space bcs .9 plp clc rts .9 plp sec XDOS.DevCall.RTS rts XDOS.DevCall.Jmp jmp (GP.DEVPTRS,x) goto driver (or error if no driver) *-------------------------------------- * ProDOS interrupt manager *-------------------------------------- XDOS.IntMgr sta ZP.A4L interrupt command lsr allocate interrupt or deallocate? bcs .4 branch if deallocate. ldx #$03 test for a free interrupt space in tbl. .1 lda GP.IRQVs-2,x test high address for 0. bne .2 branch if spot occupied. ldy #$03 get address of routine. lda (ZP.A3L),y must not be zero page. beq .3 error if it is. sta GP.IRQVs-2,x save high address dey lda (ZP.A3L),y sta GP.IRQVs-3,x and low address. txa return interrupt # in range 1-4 lsr dey sta (ZP.A3L),y pass back to user. clc no errors. rts .2 inx inx next lower priority spot cpx #$0B are all 4 already allocated? bne .1 branch if not. lda #MLI.E.IRQFULL interrupt table full .HS 2C BIT ABS .3 lda #MLI.E.INVPARAM invalid parameter. jsr GP.SYSERR .4 ldy #$01 zero out interrupt vector lda (ZP.A3L),y but make sure it is a valid #. beq .3 error if < 1 cmp #$05 or > 4 bcs .3 asl tax stz GP.IRQVs-2,x stz GP.IRQVs-1,x * clc rts *-------------------------------------- XDOS.SysErr sta GP.ERROR P8 error code plx plx pop 1 level of return sec rts *-------------------------------------- * $01 = more than 255 unclaimed irqs * $0A = open file has no volume * $0B = open file has no 1K buffer * $0C = block allocation error. *-------------------------------------- XDOS.SysDeath tax death error code. sta IO.CLR80DISP disable 80 col hardware. lda IO.SETTEXT switch in text. lda XDOS.CortFlag is this a Cortland? beq .1 if not, don't use super hires switch. stz IO.GS.NEWVIDEO force off super hires. .1 lda IO.CLRPAGE2 switch in text page 1. ldy #deathmsg.LEN-1 .2 lda deathmsg,y sta $400,y 'RESTART SYSTEM-$' dey bpl .2 txa x = death error code and #$0F convert to ascii ora #$30 cmp #$3A bcc .3 branch if not > 9. adc #$06 inc to alpha a-f .3 ldy #deathmsg.LEN ora #$80 sta $400,y lda #" " .4 iny sta $400,y cpy #39 bne .4 bra * *-------------------------------------- * ProDOS Block File Manager *-------------------------------------- XDOS.BFMgr lda XDOS.CmdFlags,x translate into command address. asl bit 7 indicates pathname to process sta cmdtemp and #$3F bit 6 is refnum, 5 is time to process tax lda cmdtable,x move address to indirect jump sta H3274+1 lda cmdtable+1,x high byte sta H3274+2 lda #$20 init backup bit flag sta bkbitflg to say 'file modified' bcc nopath jsr XDOS.GetPath process pathname before calling command bcs errorsys branch if bad name. nopath asl cmdtemp test for refnum processing bcc nopreref jsr XDOS.GetFCB set pointers to fcb and vcb of file bcs errorsys nopreref asl cmdtemp check for necessity of time stamp bcc H3274 jsr GP.CLOCK date/time H3274 jsr $FFFF SELF MODIFIED : execute command bcc goodop errorsys jsr GP.SYSERR goodop rts *-------------------------------------- * entry used by rename for 2nd pathname. *-------------------------------------- XDOS.GetRenPath ldy #$03 get address to new pathname .HS 2C *-------------------------------------- XDOS.GetPath ldy #$01 index to pathname pointer lda (ZP.A3L),y low pointer address sta zpt iny lda (ZP.A3L),y hi pointer address sta zpt+1 ldx #$00 x = index to XDOS.PathBuf ldy #$00 y = index to input pathname. stz prfxflg assume prefix is in use. stz XDOS.PathBuf mark XDOS.PathBuf = nothing processed. lda (zpt),y validate pathname length > 0 and < 65 beq errsyn cmp #$41 bcs errsyn sta pathcnt this is used to compare for inc pathcnt end of pathname processing. iny now check for full pathname... lda (zpt),y (full name if starts with '/') and #$7F cmp #'/' bne H32AD branch if prefix appended. dec prfxflg set prefix flag = prefix not used. iny index to 1st character of pathname. H32AD lda #$FF set current position of XDOS.PathBuf sta XDOS.PathBuf,x to indicate end of pathname. sta namcnt $FF = no chars processed in local name. stx namptr pointer to local name length byte. H32B8 cpy pathcnt done with pathname processing? bcs endpath lda (zpt),y get character and #$7F inx prepare for next char iny cmp #'/' is it delimiter '/' ? beq endname yes .DO LOWERCASE=0 cmp #'a' lowercase? bcc .1 no cmp #'z'+1 bcs .1 eor #$20 to uppercase .1 .FIN sta XDOS.PathBuf,x store char inc namcnt is it the 1st char of a local name? bne .2 no inc namcnt increment to 1 jsr XDOS.IsValidFirstChar bcc H32B8 bra errsyn .2 jsr XDOS.IsValidChar bcc H32B8 errsyn lda #MLI.E.INVPATH .HS 2C ptyperr lda #MLI.E.UNSUPST filetype error (not a directory) pfxerr sec rts endpath lda #$00 end pathname with a 0 bit namcnt also make sure count is positive bpl H32FD sta namcnt dex H32FD inx sta XDOS.PathBuf,x beq errsyn error if '/' only. stx pathcnt save length of pathname tax endname lda namcnt validate local name < 16 cmp #16 bcs errsyn phx save pointer ldx namptr get index to beginning of local name sta XDOS.PathBuf,x save local name's length plx restore pointer bne H32AD branch if more names to process clc probably no error, but lda prfxflg make sure all pathnames are prefixed bne H3323 or begin with a '/'. lda GP.NEWPFXPTR must be non-zero beq errsyn H3323 rts *-------------------------------------- XDOS.SetPrefix jsr XDOS.GetPath call is made to detect if a null path. bcc H3333 path ok. ldy XDOS.PathBuf is it a null pathname? bne pfxerr error if not sty GP.NEWPFXPTR fix appletalk PFI bug sty GP.PFXPTR clc no error rts H3333 jsr XDOS.FindFileOrVol go find specified prefix directory. pfxerr1 bcs pfxerr branch if error is not root directory. lda d_stor make sure last local name is dir type and #$D0 (either root or sub). eor #$D0 directory? bne ptyperr wrong type ldy prfxflg new or appended prefix? bne H334D lda GP.NEWPFXPTR append new prefix to old H334D tay sec find new beginning of prefix sbc pathcnt cmp #$C0 too long? bcc errsyn then error tax sta GP.NEWPFXPTR sta GP.PFXPTR lda d_dev save device # sta p_dev lda d_frst and address of 1st block sta p_blok lda d_frst+1 sta p_blok+1 .1 lda XDOS.PathBuf,y sta XDOS.PathBuf,x iny inx bne .1 clc good prefix rts *-------------------------------------- XDOS.GetPrefix clc calc how big a buffer is needed. ldy #$01 get index to users pathname buffer lda (ZP.A3L),y sta usrbuf user buffer ptr iny lda (ZP.A3L),y sta usrbuf+1 stz cbytes+1 set buffer length at 64 char max lda #$40 sta cbytes jsr valdbuf go validate prefix buffer address bcs pfxerr1 ldy #$00 y = indirect index to user buffer. lda GP.NEWPFXPTR get address of beginning of prefix tax beq nulprfx if null prefix. eor #$FF get total length of prefix adc #$02 add 2 for leading and trailing slashes. nulprfx sta (usrbuf),y store length in user's buffer. beq gotprfx branch if null prefix. sendprfx iny inc to next user buffer location. lda XDOS.PathBuf,x get next char of prefix. sndlimit sta (usrbuf),y give char to user. and #$F0 check for length descriptor. bne H33B3 branch if regular character lda #'/' otherwise, substitute a slash. bne sndlimit branch always H33B3 inx bne sendprfx branch if more to send. iny lda #'/' end with '/' sta (usrbuf),y gotprfx clc no error rts *-------------------------------------- XDOS.GetFCB ldy #$01 index to ref# lda (ZP.A3L),y is it a valid file# ? beq badref must not be 0. cmp #FCB.MAX+1 bcs badref pha dec lsr ror ror ror multiply by 32. sta fcbptr used as an index to fcb tax pla restore ref# in acc cmp XDOS.FCBs+FCB.ID,x bne errnoref *-------------------------------------- XDOS.GetFCBBufX lda XDOS.FCBs+FCB.BUFID,x get page address of file buffer. tay index into global buffer table. lda GB.BUFTABL-1,y sta bufaddrh beq fcbdead fcb corrupted sta datptr+1 save ptr to data area of buffer inc inc index block always 2 pages after data sta zpt+1 lda GB.BUFTABL-2,y ???? ALWAYS 0 sta bufaddrl sta datptr index and data buffers always on sta zpt page boundaries. jsr XDOS.FCBDevIDSelect lda #XDOS.VCB0 fndfvol tay search for associated vcb lda XDOS.VCBs+VCB.DEV,y cmp XDOS.FCBs+FCB.DEVID,x is this vcb the same device? beq tstvopen if it is, make sure volume is active. nxtfvol tya adjust index to next vcb. clc adc #VCB bcc fndfvol loop until volume found. lda #$0A open file has no volume so .HS 2C BIT ABS fcbdead lda #$0B fcb error so jsr GP.SYSDEATH kill the system. tstvopen lda XDOS.VCBs,y make sure this vcb is open. beq nxtfvol branch if it is not active. sty XDOS.VCBPtr save ptr to good vcb. clc no error rts Y = XDOS.VCBPtr, X = FCBPtr errnoref stz XDOS.FCBs,x badref lda #MLI.E.BADREF requested refnum is sec illegal (out of range) rts *-------------------------------------- XDOS.Online jsr mvdbufr figure out how big buffer has to be. stz cbytes set this for valdbuf routine. stz cbytes+1 ldy #$01 lda (ZP.A3L),y if 0 then cbytes=$100 else $010 for one and #$F0 device. mask out unused nibble. sta GP.DEVNUM last device used. beq .1 branch if all devices. lda #$10 cbytes = $010 sta cbytes bne .2 always taken .1 inc cbytes+1 cbytes = $100 .2 jsr valdbuf go validate buffer range against bcs .9 allocated memory. lda #$00 zero out user buffer space ldy cbytes .3 dey sta (usrbuf),y bne .3 sta namptr used as pointer to user buffer. lda GP.DEVNUM get device # again. bne online1 branch if only 1 device to process. jsr mvdevnums get list of currently recognized dev's. .4 phx save index to last item on list lda loklst,x sta GP.DEVNUM save desired device to look at. jsr online1 log this volume and return it's name. lda namptr inc pointer for next device clc adc #$10 sta namptr plx get index to device list. dex next device. bpl .4 branch if there is another device. lda #$00 no errors for multiple on-line clc .9 rts *-------------------------------------- online1 jsr XDOS.FindVCBForDevNum see if it has already been logged in. bcs online1.ERR branch if vcb is full. lda #$02 ldx #$00 read in root (volume) directory jsr XDOS.ReadGBufAX read ROOT VOL into general purpose buffer. bcc .1 branch if read was ok. ldx XDOS.VCBPtr ldy XDOS.VCBs+VCB.OFCNT,x don't take the vcb offline if bne online1.ERR there are active files present. stz XDOS.VCBs,x now take the volume offline stz XDOS.VCBs+VCB.DEV,x bra online1.ERR branch if unable to read. .1 .DO LOWERCASE=1 jsr XDOS.CheckAndUnpackGBuf bcs online1.ERR .FIN ldx XDOS.VCBPtr lda XDOS.VCBs,x has it been logged in before? beq .2 if not. lda XDOS.VCBs+VCB.OFCNT,x it has, are there active files? bne .3 branch if volume is currently busy. .2 jsr XDOS.VCBMountAtX bcs online1.ERR branch if there is a problem. lda #MLI.E.DUPVOL anticipate a duplicate active volume bit XDOS.VCBDupFlag exits. bmi online1.ERR branch if so. .3 ldx XDOS.VCBPtr jsr XDOS.VCBCmpGBUF does vol read compare with logged vol? lda #MLI.E.DSKSWIT anticipate wrong volume mounted. bcc online1.OK branch if ok. *-------------------------------------- online1.ERR pha save error code. jsr svdevn report what device has problem. pla error code. iny tell what error was encountered. sta (usrbuf),y cmp #MLI.E.DUPVOL duplicate volume error? bne .1 no. iny report which other device has same name ldx XDOS.VCBDupEnt lda XDOS.VCBs+VCB.DEV,x sta (usrbuf),y stz XDOS.VCBDupFlag clear duplicate flag. lda #MLI.E.DUPVOL duplicate volume error code. .1 sec flag error rts *-------------------------------------- online1.OK lda XDOS.VCBs,x get volume name count sta namcnt ldy namptr index to user's buffer. .1 lda XDOS.VCBs,x move name to user's buffer sta (usrbuf),y inx iny dec namcnt bpl .1 svdevn ldy namptr index to 1st byte of this entry. lda GP.DEVNUM upper nibble = device# and ora (usrbuf),y lower nibble = name length. sta (usrbuf),y clc no errors rts end of block file manager *-------------------------------------- XDOS.Create jsr XDOS.CheckPath check for duplicate, get free entry bcc duperr error code may be 'file not found' tstfnf cmp #MLI.E.FNOTFND 'file not found' is ok bne crerr1 otherwise exit with error. ldy #$07 test for tree or directory file, lda (ZP.A3L),y no other kinds are legal. cmp #$04 is it seed, sapling or tree? bcc tstdspc branch if it is cmp #$0D bne ctyperr report type error if not directory. tstdspc lda GP.DEVNUM make sure destination device jsr twrprot1 is not write protected. bcs H351D lda nofree is there space in directory to beq xtndir add this file? branch if not jmp creat1 otherwise, go create file. xtndir lda own_blk before extending directory, ora own_blk+1 make sure it's a subdirectory. bne H352A lda #MLI.E.DIRFULL otherwise, directory full error .HS 2C BIT ABS ctyperr lda #MLI.E.UNSUPST filetype error .HS 2C BIT ABS duperr lda #MLI.E.DUPFILE name already exists crerr1 sec H351D rts H352A lda ZP.BLKNUM preserve disk address of current (last) pha directory link, before allocating an lda ZP.BLKNUM+1 extended block. pha jsr alc1blk allocate a block for extending directory plx stx ZP.BLKNUM+1 restore block addr of dir info in XDOS.GBuf plx stx ZP.BLKNUM bcs H351D unable to allocate. sta XDOS.GBuf+2 save block address in y,a to sty XDOS.GBuf+3 current directory. .DO LOWERCASE=1 jsr XDOS.WriteGBufDir .ELSE jsr XDOS.WriteGBuf update directory block with new link. .FIN bcs H351D if error ldx #$01 swpbloks lda ZP.BLKNUM,x prepare new directory block sta XDOS.GBuf,x using current block as back link lda XDOS.GBuf+2,x sta ZP.BLKNUM,x and save new block as next to be written dex bpl swpbloks inx x = 0 clrdir stz XDOS.GBuf+2,x stz XDOS.GBuf+$100,x inx bne clrdir .DO LOWERCASE=1 jsr XDOS.WriteGBufDir .ELSE jsr XDOS.WriteGBuf write prepared directory extension. .FIN bcs H351D if error lda own_blk ldx own_blk+1 .DO LOWERCASE=1 jsr XDOS.ReadGBufAXDir .ELSE jsr XDOS.ReadGBufAX read in parent directory block .FIN jsr XDOS.ZPT.InitGBuf ldx own_ent and calc entry address. ocalc dex has entry address been calculated? beq H3584 if yes. lda own_len next entry address jsr XDOS.ZPT.NextA bra ocalc H3584 ldy #$13 index to block count clc H3588 lda (zpt),y adc dinctbl-$13,y add 1 to block count and sta (zpt),y iny tya $200 to the directory's eof. eor #$18 done with usage/eof update? bne H3588 branch if not. .DO LOWERCASE=1 jsr XDOS.WriteGBufDir .ELSE jsr XDOS.WriteGBuf go update parent. .FIN bcs crerr2 jmp XDOS.Create crerr2 rts return and report errors *-------------------------------------- creat1 ldx #$00 zero out XDOS.GBuf H35A0 stz XDOS.GBuf,x stz XDOS.GBuf+$100,x and data block of file. inx bne H35A0 ldy #$0B move user specified date/time cmvtime lda (ZP.A3L),y to directory. sta d_filid,y txa if all 4 bytes of date/time = 0 ora (ZP.A3L),y then use built-in date/time. tax dey cpy #$07 bne cmvtime txa does user want default time? bne cmvname if not. ldx #$03 mvdftime lda GP.DATE,x move current default date/time sta d_credt,x dex bpl mvdftime cmvname lda (ZP.A3L),y y = index to file kind. cmp #$04 lda #$10 assume tree type bcc csvfkind lda #$D0 it's directory. csvfkind ldx namptr index to local name of pathname. ora XDOS.PathBuf,x combine file kind with name length. sta d_stor sos calls this 'storage type'. and #$0F strip back to name length tay and use as counter for move. clc adc namptr calc end of name tax crname lda XDOS.PathBuf,x move local name as filename sta d_stor,y dex dey bne crname ldy #$03 index to 'access' parameter lda (ZP.A3L),y sta d_attr iny also move 'file identification' lda (ZP.A3L),y sta d_filid cmvauxid iny move auxillary identification bytes lda (ZP.A3L),y sta d_auxid-5,y cpy #$06 bne cmvauxid .DO LOWERCASE=0 lda xdosver save current xdos version # sta d_sosver lda compat and backward compatibility # sta d_comp .FIN lda #$01 usage is always 1 block sta d_usage lda d_head place back pointer to header block sta d_dhdr lda d_head+1 sta d_dhdr+1 lda d_stor storage type. and #$E0 is it a directory? beq cralcblk branch if seed file. * Create Dir First Block ldx #$1E move header to data block cmvheadr lda d_stor,x sta XDOS.GBuf+4,x dex bpl cmvheadr eor #$30 sta XDOS.GBuf+4 make it a directory header mark. .DO LOWERCASE=0 ldx #$07 overwrite password area and other cmvpass lda pass,x header info. sta XDOS.GBuf+20,x lda xdosver,x sta XDOS.GBuf+32,x dex bpl cmvpass .ELSE lda #$75 sta XDOS.GBuf+20 ldx #XDOS.VolHdrDef.Cnt-1 .1 lda XDOS.VolHdrDef,x sta XDOS.GBuf+34,x dex bpl .1 .FIN ldx #$02 and include info about parent directory stx d_eof+1 set file size = 512 cmvparnt lda d_entblk,x sta XDOS.GBuf+39,x dex bpl cmvparnt lda h_entln lastly, the length of parent's sta XDOS.GBuf+42 directory entries. .DO LOWERCASE=1 jsr XDOS.PackGBuf .FIN cralcblk jsr alc1blk get address of file's data block bcs crerr3 sta d_frst sty d_frst+1 sta ZP.BLKNUM sty ZP.BLKNUM+1 jsr XDOS.WriteGBuf go write data block of file bcs crerr3 inc h_fcnt add 1 to total # of files in this dir bne credone inc h_fcnt+1 credone jsr drevise go revise directories with new file bcs crerr3 jmp upbmap lastly, update volume bitmap *-------------------------------------- MAN SAVE usr/src/prodos.fx/prodos.s.xdos.a LOAD usr/src/prodos.fx/prodos.s ASM