NEW AUTO 3,1 *-------------------------------------- XDOS.ZPT.SetEIB jsr XDOS.ZPT.InitGBuf ldx XDOS.DE.DirEIB on the entry #. .1 dex addr = XDOS.GBuf + ((d_entnum-1) * XDOS.DH.EL) beq .8 jsr XDOS.ZPT.Next bra .1 .8 clc crerr3 rts carry set if error. *-------------------------------------- XDOS.DE.Update lda GP.DATE beq XDOS.DE.UpdateNoMTime if no clock, then don't mod date/time. ldx #3 .1 lda GP.DATE,x move last modification date/time sta XDOS.DE.MTime,x to entry being updated. dex bpl .1 sec propagate MTIME .HS 90 BCC *-------------------------------------- XDOS.DE.UpdateNoMTime clc DO NOT propagate MTIME ror scrtch save this... lda bkbitflg (bit 5 = backup needed) tsb XDOS.DE.Access mark entry as backupable lda XDOS.DE.DevID get device # of directory sta GP.DEVNUM to be revised lda XDOS.DE.DirEBlk and address of directory block. ldx XDOS.DE.DirEBlk+1 .DO LOWERCASE=1 jsr XDOS.ReadGBufAXDir .ELSE jsr XDOS.ReadGBufAX read block into general purpose buffer .FIN bcs crerr3 jsr XDOS.ZPT.SetEIB fix up ptr to entry location within XDOS.GBuf. ldy XDOS.DH.EL now move DE info to directory. dey .1 lda XDOS.DE.Filename,y sta (zpt),y dey bpl .1 lda XDOS.DE.DirHBlk is the entry block same as cmp ZP.BLKNUM the entry's header block? bne .2 if no, go save entry block lda XDOS.DE.DirHBlk+1 then maybe, so test high addresses. cmp ZP.BLKNUM+1 beq .3 branch if they are the same block. .2 .DO LOWERCASE=1 jsr XDOS.WriteGBufDir .ELSE jsr XDOS.WriteGBuf go write updated directory block. .FIN bcs crerr3 lda XDOS.DE.DirHBlk get address of header block and ldx XDOS.DE.DirHBlk+1 .DO LOWERCASE=1 jsr XDOS.ReadGBufAXDir .ELSE jsr XDOS.ReadGBufAX go read in header block to modify. .FIN bcs crerr3 .3 ldy #$01 update current # of files in this dir. .4 lda XDOS.DH.FileCnt,y sta XDOS.GBuf+37,y (current entry count) dey bpl .4 lda XDOS.DH.Access also update header's attributes. sta XDOS.GBuf+34 .DO LOWERCASE=1 jsr XDOS.WriteGBufDir .ELSE jsr XDOS.WriteGBuf go write updated header .FIN bcs .9 *-------------------------------------- .5 bit scrtch nothing to do ... bpl .8 ... if no MTIME update lda XDOS.GBuf+4 test for 'root' directory because and #$F0 if it is, then directory revision eor #$F0 is complete (leaves carry clear). beq .8 branch if done. lda XDOS.GBuf+41 get entry # sta XDOS.DE.DirEIB lda XDOS.GBuf+42 and the length of entries in that dir sta XDOS.DH.EL lda XDOS.GBuf+39 get addr of parent entry's dir block ldx XDOS.GBuf+40 .DO LOWERCASE=1 jsr XDOS.ReadGBufAX no need to pak/unpak....will disturb zpt .ELSE jsr XDOS.ReadGBufAX read it .FIN bcs .9 jsr XDOS.ZPT.SetEIB get indirect ptr to parent entry in XDOS.GBuf ldx #$03 update the modification date & time ldy #$24 for this entry too .6 lda GP.DATE,x sta (zpt),y dey dex bpl .6 .DO LOWERCASE=1 jsr XDOS.WriteGBuf .ELSE jsr XDOS.WriteGBuf write updated entry back to disk. .FIN bcs .9 if error. ldy #$26 compare current block # to this lda (zpt),y entry's header block. tax dey lda (zpt),y block as header. cmp ZP.BLKNUM are low addresses the same? bne .7 branch if entry doesn't reside in same cpx ZP.BLKNUM+1 are high address the same? beq .5 they are the same, continue to root dir. .7 .DO LOWERCASE=1 jsr XDOS.ReadGBufAX .ELSE jsr XDOS.ReadGBufAX .FIN bcc .5 continue if read was good rts .8 clc no error .9 rts *-------------------------------------- XDOS.FindDirOrVol jsr XDOS.FindFileOrVol bcs .99 lda XDOS.DE.Filename and #$F0 cmp #$D0 beq XDOS.ZPT.GetDE.CLCRTS .9 lda #MLI.E.UNSUPST sec .99 rts *-------------------------------------- XDOS.FindFileOrVol jsr XDOS.CheckPath bcc XDOS.ZPT.GetDE cmp #MLI.E.INVPATH bne fnderr clc rts *-------------------------------------- XDOS.ZPT.GetDE ldy XDOS.DH.EL Get FileInfo From Directory Block Buffer .1 dey lda (zpt),y move entry into storage sta XDOS.DE.Filename,y tya bne .1 XDOS.ZPT.GetDE.CLCRTS clc rts *-------------------------------------- XDOS.FindFile jsr XDOS.CheckPath see if file exists bcc XDOS.ZPT.GetDE rts *-------------------------------------- XDOS.CheckPath jsr XDOS.FindVol bcs fnderr.RTS bne lookfil0 branch if more than root jsr XDOS.ZPT.InitGBuf ldy #$1F move in id and date info .1 lda (zpt),y sta XDOS.DE.Filename,y dey cpy #$17 bne .1 .2 lda rootstuf-$10,y sta XDOS.DE.Filename,y dey cpy #$0F bne .2 lda #$D0 fake directory file sta XDOS.DE.Filename lda XDOS.GBuf+2 check forward link. ora XDOS.GBuf+3 if non-zero, assume full sized directory bne .3 else assume it's the slot 3 /RAM volume lda #$02 so reset eof and blocks_used fields sta XDOS.DE.EOF+1 lda #$01 sta XDOS.DE.BlkUsed .3 lda #MLI.E.INVPATH bad path (carry set) rts *-------------------------------------- errdir lda #MLI.E.BADDIR directory error fnderr sec fnderr.RTS rts *-------------------------------------- lookfil0 stz nofree reset free entry indicator. sec dir to be searched has header in this block. L37C9 stz totent reset entry counter. jsr XDOS.LookupNameInDirBlk look for name pointed to by pnptr. bcc namfound if name was found. lda XDOS.FileCnt have we looked at all of the sbc totent entries in this directory? bcc L37E2 maybe, check hi count. bne L37EB no, read next directory block. lda XDOS.FileCnt+1 has the last entry been looked at? beq errfnf yes, give 'file not found' error L37E2 dec XDOS.FileCnt+1 should be at least one L37EB sta XDOS.FileCnt keep a running count. lda /XDOS.GBuf reset indirect pointer sta zpt+1 lda XDOS.GBuf+2 get link to next dir block bne L37FC (if there is one). cmp XDOS.GBuf+3 are both zero, i.e. no link? if so, beq errdir then not all entries were acct'd for. L37FC ldx XDOS.GBuf+3 acc has value for block# (low). .DO LOWERCASE=1 jsr XDOS.ReadGBufAXDir .ELSE jsr XDOS.ReadGBufAX go read the next linked directory. .FIN bcc L37C9 if no error. rts return error in acc. *-------------------------------------- errfnf lda nofree was any free entry found? bne .2 lda XDOS.GBuf+2 test link bne .1 cmp XDOS.GBuf+3 if both are 0 then give up. beq .2 report 'not found'. .1 sta XDOS.DE.DirEBlk lda XDOS.GBuf+3 sta XDOS.DE.DirEBlk+1 assume 1st entry of next block lda #$01 is free for use. sta XDOS.DE.DirEIB mark as valid (for create) sta nofree .2 jsr nxtpnam1 'file not found' or 'path not found'? errpath1 beq .1 if non-zero then 'path not found' lda #MLI.E.PNOTFND path not found .HS 2C BIT ABS .1 lda #MLI.E.FNOTFND file not found sec lookfil0.RTS rts *-------------------------------------- namfound jsr nxtpname adj index to next name in path. beq filfound branch if that was the last name. * ldy #$00 be sure this is a directory entry. lda (zpt) high nibble will tell. and #$F0 cmp #$D0 is it a subdirectory? bne errpath1 error if not. ldy #$12 get address of 1st subdirectory block lda (zpt),y sta XDOS.DE.DirHBlk+1 save as file's header block too tax dey lda (zpt),y sta XDOS.DE.DirHBlk .DO LOWERCASE=1 jsr XDOS.ReadGBufAXDir .ELSE jsr XDOS.ReadGBufAX read subdirectory into XDOS.GBuf. .FIN bcs lookfil0.RTS if error. lda XDOS.GBuf+37 get the # of files contained in this sta XDOS.FileCnt directory. lda XDOS.GBuf+38 sta XDOS.FileCnt+1 *-------------------------------------- * Check if $75 at VOL/DIR entry + $14 * (8 bytes reserved) *-------------------------------------- .DO LOWERCASE=0 lda XDOS.GBuf+20 make sure password is disabled ldx #$00 sec rol L3869 bcc L386C inx L386C asl bne L3869 cpx #$05 is password disabled? beq movhead lda #MLI.E.INCFF directory is not compatible sec rts .FIN movhead jsr XDOS.GetDH move directory info. jmp lookfil0 do next local pathname. *-------------------------------------- XDOS.GetDH ldx #10 move this directory info .1 lda XDOS.GBuf+28,x sta XDOS.DH.CTime,x dex bpl .1 .DO ACL=1 ldx #7 lda XDOS.GBuf+$14 cmp #$57 bne .20 lda XDOS.GBuf+21 bne .20 .2 lda XDOS.GBuf+20,x sta XDOS.DH.ACL,x dex bpl .2 bra .21 .20 stz XDOS.DH.ACL,x dex bpl .20 .21 .FIN lda XDOS.GBuf+4 if this is root, then nothing to do and #$F0 eor #$F0 test header type. beq .8 branch if root ldx #$03 otherwise, save owner info about .3 lda XDOS.GBuf+39,x this header. sta XDOS.OH.Blk,x dex bpl .3 .8 rts *-------------------------------------- filfound lda XDOS.DH.EPB figure out which entry # this is sec sbc cntent max entries - count entries + 1 adc #$00 = entry # (carry was set) sta XDOS.DE.DirEIB lda ZP.BLKNUM and indicate block # of this directory sta XDOS.DE.DirEBlk lda ZP.BLKNUM+1 sta XDOS.DE.DirEBlk+1 * clc done by ADC #$00 rts *-------------------------------------- XDOS.LookupNameInDirBlk lda XDOS.DH.EPB reset count of files per block sta cntent jsr XDOS.ZPT.InitGBuf reset indirect pointer to XDOS.GBuf bcs .4 branch if this block contains a header .1 ldy #$00 lda (zpt),y get length of name in directory. bne .2 branch if there is a name. lda nofree test if a free entry has been declared. bne .4 yes, inc to next entry. jsr filfound set address for current entry. inc nofree indicate a free spot has been found. bra .4 .2 and #$0F strip byte (is checked by 'filfound') inc totent inc count of valid files found. sta namcnt save name length as counter. ldx namptr get index to current path. cmp XDOS.PathBuf,x are both names the same length? bne .4 no, inc to next entry. .3 inx (first) next letter index iny lda (zpt),y compare names letter by letter cmp XDOS.PathBuf,x bne .4 dec namcnt all letters compared? bne .3 no, continue. clc a match is found. .9 rts .4 dec cntent checked all entries in this block? sec beq .9 yes, no name match. jsr XDOS.ZPT.Next bra .1 *-------------------------------------- XDOS.FindVol jsr XDOS.FindVolInVCBOrDev bcs novolume .DO ACL=1 ldx #$4A .ELSE ldx #$42 zero out directory temps .FIN .1 stz XDOS.OH.Blk,x and owner info dex bpl .1 lda GP.DEVNUM setup device # for this directory sta XDOS.DE.DevID jsr XDOS.GetDH setup other header info from directory ldy #$01 in XDOS.GBuf and clean up misc info. ldx XDOS.VCBPtr inx .2 lda XDOS.VCBs+VCB.TBLK,x misc info includes sta XDOS.DH.BlkCnt,y total # of blocks, lda XDOS.VCBs+VCB.BMAP,x the address of the 1st bitmap, sta XDOS.DH.BMPtr,y lda ZP.BLKNUM,y directory's disk address, sta XDOS.DE.DirHBlk,y lda XDOS.DH.FileCnt,y and setting up a counter for the # of sta XDOS.FileCnt,y files in this directory. dex dey bpl .2 *-------------------------------------- nxtpname jsr nxtpnam1 get new namptr in y and namlen in acc. sty namptr save new pathname pointer. rts (status reg according to accumulator) *-------------------------------------- nxtpnam1 ldy namptr inc pathname pointer to next name lda XDOS.PathBuf,y in the path. sec adc namptr if this addition results in zero, tay then prefixed directory has been moved * bne .1 to another device. branch if not. * lda GP.DEVNUM revise GP.DEVNUM for prefixed directory * sta p_dev .1 lda XDOS.PathBuf,y test for end of name. clc no errors novolume rts *-------------------------------------- OK for . XDOS.FindVolInVCBOrDev lda #$00 ldy GP.PFXPTR use prefix volume name to look up vcb. bit prfxflg is this a prefixed path? bpl L396F branch if it is tay set ptr to volume name L396F sty L39D4+1 and save. sta GP.DEVNUM zero out dev# until vcb located. lda #XDOS.VCB0 L3975 pha acc now used as vcb lookup index. tax index pointer to x. lda XDOS.VCBs,x get vcb volume name length. bne L3987 branch if claimed vcb to be tested. L397C ldy L39D4+1 restore pointer to requested vol name. pla now adj vcb index to next vcb entry. clc adc #VCB bcc L3975 branch if more vcb's to check bcs L39D4 otherwise go look for unlogged volumes. L3987 sta namcnt save length of vol name to be compared. L398A cmp XDOS.PathBuf,y is it the same as requested vol name? bne L397C branch if not inx iny next character lda XDOS.VCBs,x dec namcnt last character? bpl L398A if not. plx restore pointer to matching vcb. stx XDOS.VCBPtr save it for future reference. lda XDOS.VCBs+VCB.DEV,x get it's device # sta GP.DEVNUM and save it. lda #$02 assume prefix is not used and ldx #$00 that root directory is to be used. pha lda L39D4+1 = 0 if no prefix. L39AC tay if prefix then find ptr to prefixed sta namptr dir name. save path ptr. beq L39C2 branch if no prefix. sec adc XDOS.PathBuf,y inc to next dir in prefix path. bcc L39AC branch if another dir in prefix. pla lda p_blok volume verification will occur at pha ldx p_blok+1 subdirectory level. * verify volume name L39C2 pla jsr XDOS.ReadGBufAX read in directory (or prefix dir) bcs L39CC if error then look on other devices. .DO LOWERCASE=1 jsr XDOS.CheckAndUnpackGBuf bcs L39CC .FIN jsr XDOS.CheckVolName compare dir name with path name. bcc L39F0 if they match, stop looking. L39CC ldx XDOS.VCBPtr check if current (matched) vcb is active lda XDOS.VCBs+VCB.OFCNT,x i.e. does it have open files? bne L39ED report not found if active. L39D4 lda #$FF SELF MODIFIED vnptr : make path ptr same as volume ptr sta namptr jsr mvdevnums copy all device #'s to be examined. lda GP.DEVNUM log current device 1st before searching bne L39F1 others. L39E2 ldx GP.DEVCNT scan look list for devices we need L39E5 lda loklst,x to search for the requested volume. bne L39F4 branch if we've a device to look at. dex bpl L39E5 look at next one. L39ED lda #MLI.E.VNOTFND no mounted volume sec error L39F0 rts L39F1 ldx GP.DEVCNT now remove the device from the list L39F4 cmp loklst,x of prospective devices. beq L39FE branch if match. dex look until found. bpl L39F4 always taken (usually) unless bmi L39ED if dev was removed from GP.DEVLST (/RAM). L39FE sta GP.DEVNUM preserve device to be checked next. stz loklst,x mark this one as tested. jsr XDOS.FindVCBForDevNum find vcb that claims this dev (if any). bcs L3A29 branch if vcb full. lda XDOS.VCBs,x did we find it or return free vcb? beq L3A16 if free vcb. lda XDOS.VCBs+VCB.OFCNT,x is this volume active? bne L39E2 if so, no need to re-log. L3A16 lda #$02 go read root dir into XDOS.GBuf ldx #$00 .DO LOWERCASE=1 jsr XDOS.ReadGBufAXDir .ELSE jsr XDOS.ReadGBufAX .FIN bcs L39E2 ignore if unable to read. jsr XDOS.VCBMount bcs L39E2 look at next if non-xdos disk mounted. jsr XDOS.CheckVolName is this the volume ? bcs L39E2 if not L3A29 rts *-------------------------------------- mvdevnums ldx GP.DEVCNT copy all dev #'s to be checked. .1 lda GP.DEVLST,x active device list. and #$F0 strip device type info. sta loklst,x copy them to a temp workspace dex bpl .1 ldx GP.DEVCNT rts *-------------------------------------- XDOS.FindVCBForDevNum lda #XDOS.VCB0 look for vcb for GP.DEVNUM ldy #$FF .1 tax new index to next vcb lda XDOS.VCBs+VCB.DEV,x check all devnums cmp GP.DEVNUM is this the vcb? beq .7 lda XDOS.VCBs,x is this a free vcb? bne .3 if not iny bne .3 already found a free one stx XDOS.VCBPtr save first free VCB .3 txa clc inc index to next vcb adc #VCB bcc .1 ldx XDOS.VCBPtr get found free if any tya any free vcb's available? bpl .8 yes, exit with X = XDOS.VCBPtr lda #XDOS.VCB0 look for an entry to kick out .4 tax lda XDOS.VCBs+VCB.OFCNT,x any open files? beq .5 no, kick this one out. txa next vcb clc adc #VCB bcc .4 lda #MLI.E.VCBFULL all vcb entries have open files * sec rts .5 stz XDOS.VCBs,x free this entry stz XDOS.VCBs+VCB.DEV,x .7 stx XDOS.VCBPtr save entry index. .8 clc no error. rts *-------------------------------------- XDOS.CheckVolName ldx #$00 index to directory name. ldy namptr index to pathname. lda XDOS.GBuf+4 get dir name length and type. cmp #$E0 is it a directory? bcc .1 if not. and #$0F isolate name length and sta namcnt save as a counter. bne .3 branch if valid length. .1 sec indicate not found rts .2 lda XDOS.GBuf+4,x next char .3 cmp XDOS.PathBuf,y bne .1 if not the same. inx check next char iny dec namcnt bpl .2 if more to compare. clc match found XDOS.CheckVolName.RTS rts *-------------------------------------- XDOS.VCBMount ldx XDOS.VCBPtr previously logged in volume? lda XDOS.VCBs,x (acc = 0?) beq XDOS.VCBMountAtX no, go prepare vcb. jsr XDOS.VCBCmpGBUF does vcb match vol read? bcc XDOS.CheckVolName.RTS yes, do not disturb. XDOS.VCBMountAtX ldy #VCB zero out vcb entry .1 stz XDOS.VCBs,x inx dey bne .1 lda XDOS.GBuf pointer to previous dir block ora XDOS.GBuf+1 must be null bne .9 lda XDOS.GBuf+4 test for header and #$E0 cmp #$E0 bne .9 jsr XDOS.ChkDupVol does a duplicate with open files bcs .8 already exist? branch if yes. lda XDOS.GBuf+4 move volume name to vcb. and #$0F strip root marker tay pha * clc adc XDOS.VCBPtr tax .2 lda XDOS.GBuf+4,y sta XDOS.VCBs,x dex dey bne .2 pla get length again sta XDOS.VCBs,x and save. lda GP.DEVNUM last device used. sta XDOS.VCBs+VCB.DEV,x save device # and ldy #0 .3 lda XDOS.GBuf+39,y sta XDOS.VCBs+VCB.BMAP,x copy BMAP+TBLK iny inx cpy #4 bne .3 .8 clc indicate logged if possible rts .9 lda #MLI.E.NOTPRODOS not tree or dir, unrecognized type sec rts *-------------------------------------- XDOS.VCBCmpGBUF lda XDOS.GBuf+4 with name in directory. and #$0F cmp XDOS.VCBs,x are they the same length? stx .1+1 xvcbptr : see rev note #23 bne .9 if not the same. tay clc .1 adc #$FF xvcbptr : SELF MODIFIED tax .2 lda XDOS.GBuf+4,y cmp XDOS.VCBs,x bne .9 if not the same. dex dey bne .2 clc indicate match. .HS B0 BCS .9 sec ldx .1+1 xvcbptr : offset to start of vcb (rev note #23) rts *-------------------------------------- XDOS.ChkDupVol lda #XDOS.VCB0 check for other logged in volumes with the same name. .1 tax jsr XDOS.VCBCmpGBUF bcs .2 if no match. lda XDOS.VCBs+VCB.OFCNT,x test for any open files. bne .3 cannot look at this volume. stz XDOS.VCBs,x take duplicate offline if no open files stz XDOS.VCBs+VCB.DEV,x * clc ok to log in new volume. rts .2 txa index to next vcb * sec adc #VCB-1 bcc .1 branch if more to check clc rts .3 sta XDOS.VCBDupFlag duplicate has been found. stx XDOS.VCBDupEnt save pointer to conflicting vcb. sec error. rts *-------------------------------------- XDOS.CheckFree ldx XDOS.VCBPtr test if enough free blocks available for request. lda XDOS.VCBs+VCB.FBLK+1,x check if proper count for this volume. ora XDOS.VCBs+VCB.FBLK,x bne XDOS.CheckFree1 branch if count is non-zero. XDOS.GetFreeCntVCBX jsr XDOS.GetBMCnt get # of bitmaps sta bmcnt and save. stz scrtch start count at 0 stz scrtch+1 lda #$FF mark 'first free' temp as unknown sta nofree jsr XDOS.FlushBM update volume bitmap. bcs L3BC1 if error. ldx XDOS.VCBPtr get address of 1st bitmap lda XDOS.VCBs+VCB.BMAP,x sta ZP.BLKNUM lda XDOS.VCBs+VCB.BMAP+1,x sta ZP.BLKNUM+1 .1 jsr XDOS.ReadGBuf use general buffer for temp space to bcs L3BC1 count free blocks (bits). jsr XDOS.CntFreeGBuf dec bmcnt was that the last bitmap? bmi .2 if so, go change fcb so not done again. inc ZP.BLKNUM bne .1 inc ZP.BLKNUM+1 bra .1 .2 ldx XDOS.VCBPtr mark which block had 1st free space lda nofree bmi L3BBE if no free space was found. sta XDOS.VCBs+VCB.BMAPIDX,x update the free count. lda scrtch+1 sta XDOS.VCBs+VCB.FBLK+1,x update volume control byte. lda scrtch sta XDOS.VCBs+VCB.FBLK,x *-------------------------------------- XDOS.CheckFree1 lda XDOS.VCBs+VCB.FBLK,x compare total available free blocks sec on this volume. sbc reql lda XDOS.VCBs+VCB.FBLK+1,x sbc reqh bcc L3BBE clc rts L3BBE lda #MLI.E.VOLFULL sec L3BC1 rts *-------------------------------------- XDOS.CntFreeGBuf ldy #$00 .1 lda XDOS.GBuf,y bit pattern. beq .2 don't count jsr XDOS.CntFreeA .2 lda XDOS.GBuf+$100,y do both pages with same loop beq .3 jsr XDOS.CntFreeA .3 iny bne .1 loop until all 512 bytes counted. bit nofree has 1st block w/free space been found? bpl .8 if yes. lda scrtch test to see if any blocks were counted ora scrtch+1 beq .8 branch if none counted. jsr XDOS.GetBMCnt get total # of maps. sec subtract countdown from total bitmaps sbc bmcnt sta nofree .8 rts *-------------------------------------- XDOS.CntFreeA asl count the # of bits in this byte bcc .1 inc scrtch bne .1 inc scrtch+1 .1 tax bne XDOS.CntFreeA loop until all bits counted .8 rts *-------------------------------------- XDOS.GetBMCnt ldx XDOS.VCBPtr lda XDOS.VCBs+VCB.TBLK+1,x return the # of bitmaps ldy XDOS.VCBs+VCB.TBLK,x possible with the total count bne .1 found in the vcb. dec adj for bitmap block boundary .1 lsr divide by 16. the result is lsr the # of bitmaps. lsr lsr rts *-------------------------------------- MAN SAVE usr/src/prodos.fx/prodos.s.xdos.b LOAD usr/src/prodos.fx/prodos.s ASM