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A2osX/ProDOS.FX/ProDOS.S.XDOS.E.txt
burniouf 74acfeccd1 KERNEL & DRVs : lot of fixes around DEV.Open() , KCONFIG 
SH : fiw for line wrap
ProDOS.FX : removed a strange bug inherited from 2.0.3 trashing FCBs
2023-11-26 14:17:41 +01:00

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NEW
AUTO 3,1
*--------------------------------------
XDOS.Close ldy #$01 close all ?
lda (ZP.A3L),y
bne XDOS.CloseOne no, just one of them.
sta cferr clear global close error.
* lda #$00 start at the beginning.
.1 sta XDOS.FCBPtr save current low byte of pointer.
tax get the level at which the file
lda XDOS.FCBs+FCB.FLEVEL,x was opened.
cmp GP.FLEVEL if file's level is < global level
bcc .2 then don't close.
lda XDOS.FCBs+FCB.ID,x is this reference file open ?
beq .2 no, try next.
jsr flush2 clean it out...
bcs L46B6 return flush errors.
jsr close2 update fcb & vcb
ldy #$01
lda (ZP.A3L),y
beq .2 no error if close all.
bcs L46B6 close error.
.2 lda XDOS.FCBPtr inc pointer to next fcb
clc
adc #FCB
bcc .1 branch if within same page.
lda cferr on final close report logged errors.
beq L46B4 branch if errors.
rts (carry already set).
*--------------------------------------
XDOS.CloseOne jsr XDOS.FlushOne flush file 1st (including updating bitmap)
* bcs L46B6 branch if errors.
bcc close2
php
pha
jsr close2
pla
plp
rts
close2 ldx XDOS.FCBPtr
lda XDOS.FCBs+FCB.BUFID,x release file buffer
jsr relbuffr
bcs L46B6
jsr XDOS.FCBDevIDSelect
stz XDOS.FCBs,x free fcb too
jsr XDOS.FindVCBForDevNum get vcb pointer.
dec XDOS.VCBs+VCB.OFCNT,x indicate one less file open.
L46B4 clc
rts
L46B6 bcs L46E6 don't report close all error now.
*--------------------------------------
XDOS.Flush ldy #$01 flush all ?
lda (ZP.A3L),y
bne XDOS.FlushOne no, just one of them.
sta cferr clear global flush error.
* lda #$00 start at the beginning.
L46C3 sta XDOS.FCBPtr save current low byte of pointer.
tax index to ref #.
lda XDOS.FCBs,x is this reference file open ?
beq L46D1 no, try next.
jsr flush2 clean it out...
bcs L46E6 return anty errors.
L46D1 lda XDOS.FCBPtr inc pointer to next fcb.
clc
adc #FCB
bcc L46C3 branch if within same page
L46D9 clc
lda cferr on last flush,
beq L46E0 branch if no logged errors.
sec report error now
L46E0 rts
*--------------------------------------
flush2 jsr XDOS.GetFCBBufX must set up vcb & buffer locations 1st.
bcc L46F1 branch if no error.
L46E6 jmp glberr error so check for close or flush all.
XDOS.FlushOne stz cferr for normal refnum flush, clear global error.
jsr XDOS.GetFCB setup pointer to fcb user references.
bcs L46E6 return any errors.
L46F1 lda XDOS.FCBs+FCB.ACCESS,x test to see if file is modified.
and #$02 is it write enabled ?
beq L46D9 branch if 'read only'
lda XDOS.FCBs+FCB.DIRTY,x has eof been modified ?
bmi L4704 if yes.
jsr XDOS.GetFCBStatus has data been modified ?
and #$70 (was written to while it's been open?)
beq L46D9 if not.
L4704 jsr XDOS.GetFCBStatus
and #$40 does current data buffer need to be
beq L4710 written ? branch if not.
jsr XDOS.WriteDBLK if so, go write it.
bcs L46E6 if error.
L4710 jsr XDOS.GetFCBStatus check to see if the index block (tree
* and #$80 files only) needs to be written.
* beq L471C branch if not.
bpl L471C
jsr XDOS.WriteIBLK
bcs L46E6 return any errors.
L471C ldy #0
jsr XDOS.FCBDevIDSelect X = XDOS.FCBPtr
L4723 lda XDOS.FCBs+FCB.DEVID,x note: this code depends on the defined
sta XDOS.DE.DevID,y order of the file control block and the
inx temporary directory area in 'work space'
iny
cpy #6
bne L4723
lda XDOS.DE.DirHBlk read the directory header for this file
ldx XDOS.DE.DirHBlk+1
.DO LOWERCASE=1
jsr XDOS.ReadGBufAXDir
.ELSE
jsr XDOS.ReadGBufAX read DIR into the general purpose buffer.
.FIN
bcs L46E6 if error.
jsr XDOS.GetDH move header info.
lda XDOS.DE.DirEBlk get address of directory block that
ldx XDOS.DE.DirEBlk+1 contains the file entry.
cmp XDOS.DE.DirHBlk test to see if it's the same block the
bne .1 header is in. branch if not.
cpx XDOS.DE.DirHBlk+1
beq L4755 branch if header block = entry block
.1 .DO LOWERCASE=1
jsr XDOS.ReadGBufAXDir
.ELSE
jsr XDOS.ReadGBufAX read DIR block with file entry in general buffer.
.FIN
L4755 jsr XDOS.ZPT.SetEIB set up pointer to entry.
jsr XDOS.ZPT.GetDE move entry to temp entry buffer in
ldx XDOS.FCBPtr 'work space'. update 'blocks used' count
lda XDOS.FCBs+FCB.UBLK,x
sta XDOS.DE.BlkUsed
lda XDOS.FCBs+FCB.UBLK+1,x
sta XDOS.DE.BlkUsed+1
ldy #0 and move in end of file mark whether
L476C lda XDOS.FCBs+FCB.EOF,x needed or not.
sta XDOS.DE.EOF,y
iny
cpy #$03 move all 3 bytes
beq L4780
lda XDOS.FCBs+FCB.1stBLK,x also move in the address of the file's
sta XDOS.DE.Type,y first block since it might have changed
inx since the file first opened.
bne L476C branch always.
L4780 ldx XDOS.FCBPtr
lda XDOS.FCBs+FCB.STYPE,x the last thing to update is storage
asl type (y=XDOS.FCBPtr+2). shift into high
asl nibble.
asl
asl
sta scrtch
lda XDOS.DE.Filename get old type byte (might be the same).
and #$0F strip off old type,
ora scrtch add in the new type
sta XDOS.DE.Filename and put it away.
jsr XDOS.DE.Update go update directory.
bcs glberr error.
ldx XDOS.FCBPtr mark
stz XDOS.FCBs+FCB.DIRTY,x fcb/directory as undirty.
lda XDOS.DE.DevID see if bitmap should be written.
cmp XDOS.BM.DevID is it in same as current file ?
bne L47B2 yes, put it on the disk if necessary.
jsr XDOS.FlushBM go put it away.
bcs glberr flush error
L47B2 clc
rts
*--------------------------------------
* report error only if not a close all or flush all
*--------------------------------------
glberr ldy #$01
pha
lda (ZP.A3L),y
bne L47C1 not an 'all' so report now
clc
pla
sta cferr save for later
rts
L47C1 pla
rts
*--------------------------------------
XDOS.FCBDevIDSelect
ldx XDOS.FCBPtr
lda XDOS.FCBs+FCB.DEVID,x
sta GP.DEVNUM
rts
*--------------------------------------
XDOS.SetFCBSType
lsr
lsr
lsr
lsr
ldy XDOS.FCBPtr and save it in fcb.
sta XDOS.FCBs+FCB.STYPE,y
rts
*--------------------------------------
XDOS.ClrFCBStatus
ldy XDOS.FCBPtr clear allocation states for data block
lda XDOS.FCBs+FCB.F,y and both levels of indexes/
and #$F8
sta XDOS.FCBs+FCB.F,y indicates that either they exist now
rts or unnecessary for current position.
*--------------------------------------
XDOS.GetFCBStatus
ldx XDOS.FCBPtr index to fcb.
lda XDOS.FCBs+FCB.F,x return status byte.
rts
*--------------------------------------
XDOS.SetFCBStatus
ldx XDOS.FCBPtr
ora XDOS.FCBs+FCB.F,x
sta XDOS.FCBs+FCB.F,x
rts
*--------------------------------------
L47CA lda #MLI.E.LOCKED access error
sec
L47CD rts
*--------------------------------------
XDOS.SetEOF jsr XDOS.GetFCB.ST can only move end of tree, sapling or seed.
cmp #$04 tree type ?
bcs L47CA if not then access error
asl
asl
asl
asl
sta stortyp may be used later.
lda XDOS.FCBs+FCB.ACCESS,y
and #$02 is write enabled to set new eof ?
beq L47CA no, access error.
jsr XDOS.TestWP hardware write protected ?
bcs L47CA yes, access error.
ldy XDOS.FCBPtr save old eof so it can be seen
iny whether blocks need to be released
iny upon contraction.
ldx #$02 all 3 bytes of the eof
L47EF lda XDOS.FCBs+FCB.EOF,y
sta oldeof,x
dey
dex
bpl L47EF
ldy #$04
ldx #$02
L47FD lda (ZP.A3L),y position mark to new eof
sta XDOS.TmpPos,x
dey
dex
bpl L47FD
ldx #$02 point to 3rd byte.
L4808 lda oldeof,x see if eof moved backwards so blocks
cmp XDOS.TmpPos,x can be released.
bcc eofset (branch if not)
bne purge branch if blocks to be released
dex
bpl L4808 all 3 bytes
eofset ldy #$04
ldx XDOS.FCBPtr place new end of file into fcb
inx
inx
L481C lda (ZP.A3L),y
sta XDOS.FCBs+FCB.EOF,x
dex
dey
cpy #$02 all 3 bytes moved ?
bcs L481C no.
jmp XDOS.SetFCB.DIRTY mark fcb as dirty.
purge jsr XDOS.FlushOne make sure file is current
bcs L47CD
ldx ZP.DataPtr+1 pointer to index block
inx
inx
stx zpt+1 (zero page conflict with dir buf ptr)
ldx ZP.DataPtr
stx zpt
ldy XDOS.FCBPtr check if eof < mark
iny
iny
ldx #$02
L4840 lda XDOS.FCBs+FCB.MARK,y
cmp XDOS.TmpPos,x compare until not equal or carry clear.
bcc L485F branch if eof > mark.
bne L484E branch if eof < mark.
dey
dex
bpl L4840 compare all 3 bytes
L484E ldy XDOS.FCBPtr
ldx #$00
L4853 lda XDOS.TmpPos,x fake position, correct position will
sta XDOS.FCBs+FCB.MARK,y be made below...
iny
inx
cpx #$03 move all 3 bytes
bne L4853
L485F jsr XDOS.GetFreeCntVCBX force free block count before releasing
lda XDOS.TmpPos blocks. prepare for purge of excess...
sta dseed all blocks and bytes beyond new eof
lda XDOS.TmpPos+1 must be zero'd
sta dsap
and #$01
sta dseed+1
lda XDOS.TmpPos+2
lsr
sta dtree
ror dsap pass position in terms of block & bytes.
lda dseed now adjust for boundaries of $200
ora dseed+1
bne L48A2 branch if no adjustment necessary.
lda dsap get correct block positions for sap
sec and tree levels.
sbc #$01
sta dsap deallocate for last (phantom) block
lda #$02 and don't modify last data block.
bcs L489F branch if tree level unaffected.
dec dtree
bpl L489F branch if new eof not zero
lda #$00
sta dtree otherwise, make a null seed out of it.
sta dsap
L489F sta dseed+1
L48A2 ldy XDOS.FCBPtr also must pass file's 1st block address.
lda XDOS.FCBs+FCB.1stBLK,y
sta XDOS.1stBLK
lda XDOS.FCBs+FCB.1stBLK+1,y
sta XDOS.1stBLK+1
stz deblock lastly, initialize # of blocks to
stz deblock+1 be free'd.
jsr detree deallocate blocks from tree.
php save any error status until fcb
pha is cleaned up.
sec
ldy XDOS.FCBPtr
ldx #$ff
L48C2 inx
lda XDOS.1stBLK,x
sta XDOS.FCBs+FCB.1stBLK,y move in possible new first file block
lda XDOS.FCBs+FCB.UBLK,y address. adjust usage count also
sbc deblock,x
sta XDOS.FCBs+FCB.UBLK,y
iny
txa
beq L48C2 without disturbing carry.
lda stortyp get possibly modified storage type
jsr XDOS.SetFCBSType
jsr XDOS.ClrFCBStatus make it look as though position has
jsr XDOS.SetVCB.FBLK nothing allocated, update total blocks
ldy XDOS.FCBPtr in fcb and correct position.
iny
iny
ldx #2
L48F2 lda XDOS.FCBs+FCB.MARK,y tell 'rdposn' to go to correct
sta XDOS.TmpPos,x
eor #$80 position from incorrect place.
sta XDOS.FCBs+FCB.MARK,y
dey
dex
bpl L48F2
jsr rdposn go to correct position.
bcc L490D if no error.
plx discard latest error code to stack
plp
sec
php
pha save new error.
* mark file as in need of a flush and update fcb with new end of file,
* then flush it.
L490D jsr eofset go mark and update
jsr XDOS.FlushOne then go do the flush.
bcc L491C branch if no error.
plx clean previous error off stack
plx and previous P
rts
L491C pla report any errors that may have
plp appeared.
rts
*--------------------------------------
XDOS.GetEOF ldx XDOS.FCBPtr index to end of file mark
ldy #$02 and index to user's call parameters
L4924 lda XDOS.FCBs+FCB.EOF,x
sta (ZP.A3L),y
inx
iny
cpy #$05
bne L4924 loop until all 3 bytes moved
clc no errors
rts
*--------------------------------------
XDOS.NewLine ldy #$02 adjust newline status for open file.
lda (ZP.A3L),y on or off ?
ldx XDOS.FCBPtr it will be 0 if off.
sta XDOS.FCBs+FCB.NLMASK,x set new line mask
iny
lda (ZP.A3L),y and move in 'new-line' byte
sta XDOS.FCBs+FCB.NLBYTE,x
clc no error possible
rts
*--------------------------------------
XDOS.GetFileInfo
jsr XDOS.FindFile look for file.
bcc .1 no error.
jsr XDOS.GetFileInfoVol
bcs .9
.1 lda XDOS.DE.Filename transfer bytes from internal order to
lsr call spec via XDOS.DE2FINFO translation
lsr table but first change storage type to
lsr external (low nibble) format.
lsr
sta XDOS.DE.Filename
ldy #$11 index to last of user's spec table.
.2 lda XDOS.DE2FINFO-3,y
and #$7F strip bit used by setinfo
tax
lda XDOS.DE.Filename,x move directory info to call spec. table
sta (ZP.A3L),y
dey
cpy #$03
bcs .2 if all info bytes moved, retn carry clr
* clc
.9 rts
*--------------------------------------
XDOS.SetFileInfo
jsr XDOS.FindFile get the file to work on.
bcs .3 if error.
lda GP.BUBIT see if backup bit can be cleared
eor #$20
and XDOS.DE.Access
and #$20
sta bkbitflg or preserve current...
ldy #$0D init pointer to user supplied list.
.1 ldx XDOS.DE2FINFO-3,y get index to corresponding 'd.' table.
bmi .2 branch if parameter can't be set.
lda (ZP.A3L),y
sta XDOS.DE.Filename,x
.2 dey has user's request been satisfied ?
cpy #$03
bcs .1 no, move next byte.
and #$18 make sure no illegal access bits were
beq .4 set !! branch if legal access.
lda #MLI.E.LOCKED otherwise, access error.
sec
.3 rts
.4 ldy #$0B
lda (ZP.A3L),y was clock null input ?
bne XDOS.SetFileInfoEx.8
jmp XDOS.DE.Update update with clock also...
*--------------------------------------
XDOS.SetFileInfoEx
jsr XDOS.FindFile
bcs XDOS.GetFileInfoEx.RTS
ldx #S.FIEX.BLKPTR+2-1
ldy #S.FIEX.BLKPTR+2-1+3
.2 lda (ZP.A3L),y
sta XDOS.DE.Filename,x
dey
dex
bpl .2
XDOS.SetFileInfoEx.8
jmp XDOS.DE.UpdateNoMTime
*--------------------------------------
XDOS.GetFileInfoEx
jsr XDOS.FindFile
bcc .1
jsr XDOS.GetFileInfoVol
bcs .9
.1 ldx #S.FIEX.BLKPTR+2-1
ldy #S.FIEX.BLKPTR+2-1+3
.2 lda XDOS.DE.Filename,x
sta (ZP.A3L),y
dey
dex
bpl .2
ldx #7
ldy #S.FIEX.ACL+7+3
.DO ACL=1
.3 lda XDOS.DH.ACL,x
sta (ZP.A3L),y
dey
dex
bpl .3
.ELSE
lda #0
.3 sta (ZP.A3L),y
dey
dex
bpl .3
.FIN
* clc
.9
XDOS.GetFileInfoEx.RTS
rts
*--------------------------------------
XDOS.GetFileInfoVol
cmp #MLI.E.INVPATH was it a root directory file ?
sec (in case of no match)
bne .9 if not, then error.
lda #$F0
sta XDOS.DE.Filename for get info, report proper storage type
stz reql force a count of free blocks.
stz reqh
ldx XDOS.VCBPtr
jsr XDOS.GetFreeCntVCBX get a fresh count of free blocks on
ldx XDOS.VCBPtr this volume.
lda XDOS.VCBs+VCB.FBLK+1,x return total blocks and total in use.
sta reqh 1st transfer 'free' blocks to zpage
lda XDOS.VCBs+VCB.FBLK,x for later subtraction to determine
sta reql the 'used' count.
lda XDOS.VCBs+VCB.TBLK+1,x transfer to 'd.' table as aux id
sta XDOS.DE.AuxType+1 (total block count is considered aux id
pha for the volume)
lda XDOS.VCBs+VCB.TBLK,x
sta XDOS.DE.AuxType
sec subtract and report the number of
sbc reql blocks 'in use'
sta XDOS.DE.BlkUsed
pla
sbc reqh
sta XDOS.DE.BlkUsed+1
clc
.9 rts
*--------------------------------------
XDOS.ACL jsr XDOS.FindDirOrVol
bcs .9
jsr XDOS.ReadGBufDEKeyPtr
bcs .9
ldx #7
ldy #S.FIEX.ACL+3
lda (ZP.A3L),y
beq .2
ldy #S.FIEX.ACL+7+3
.1 lda (ZP.A3L),y
sta XDOS.GBuf+20,x
dey
dex
bpl .1
.DO LOWERCASE=1
jmp XDOS.WriteGBufDir
.ELSE
jmp XDOS.WriteGBuf
.FIN
.2 ldy #S.FIEX.ACL+7+3
.3 lda XDOS.GBuf+20,x
sta (ZP.A3L),y
dey
dex
bpl .3
* clc
.9 rts
*--------------------------------------
XDOS.Rename jsr XDOS.CheckPath look for source (original) file.
bcc XDOS.RenameFileDir if found.
cmp #$40 trying to rename a volume ?
bne L49FD no, return error.
XDOS.RenameVol jsr XDOS.GetRenPath syntax new name.
bcs L49FD rename error.
ldy XDOS.PathBuf find out if only rootname for new name
iny
lda XDOS.PathBuf,y must be $FF if volume name only.
bne L4A72 if not single name
ldx XDOS.VCBPtr check for open files before changing.
lda XDOS.VCBs+VCB.OFCNT,x
beq L49FF if volume not busy.
lda #MLI.E.OPEN file busy error.
L49FD sec
rts
L49FF ldy #0 get newname's length
lda XDOS.PathBuf,y
ora #$F0 (root file storage type)
jsr XDOS.UpdateHdr update root directory.
bcs .9 rename error.
ldy #$00
ldx XDOS.VCBPtr update vcb also.
.3 lda XDOS.PathBuf,y move new name to vcb.
beq .8
sta XDOS.VCBs,x
iny next character
inx
bra .3
.8
* clc no errors
.9 rts
*--------------------------------------
XDOS.RenameFileDir
jsr XDOS.GetNamPtr set y = 1st char of path, x = 0.
L4A21 lda XDOS.PathBuf,y move original name to XDOS.GBuf
sta XDOS.GBuf,x for later comparison to new name.
bmi L4A2D if last character has been moved
iny otherwise, get the next one.
inx
bra L4A21
L4A2D jsr XDOS.GetRenPath get new name syntaxed.
bcs L4A74 rename error.
jsr XDOS.GetNamPtr set y = path, x = 0.
lda XDOS.PathBuf,y now compare new name with old name
L4A38 cmp XDOS.GBuf,x to make sure they are in the same dir.
php save result of comparison.
and #$F0 was last char really a count ?
bne L4A46 if not.
sty rnptr save pointer to next name, it might
stx namptr be the last.
L4A46 plp result of last comparison ?
bne L4A52 branch if different character or count.
inx bump pointers.
iny
lda XDOS.PathBuf,y was it the last character ?
bne L4A38 if not.
clc no operation, names were the same.
rts
L4A52 ldy rnptr index to last name in the chain.
lda XDOS.PathBuf,y get last name length.
sec
adc rnptr
tay
lda XDOS.PathBuf,y this byte should be $00 !
bne L4A72 if not, bad path error.
ldx namptr index to last of original name
lda XDOS.GBuf,x
sec
adc namptr
tax
lda XDOS.GBuf,x this byte should also be $00.
beq L4A76 if so, continue processing.
L4A72 lda #MLI.E.INVPATH bad pathname error.
.HS 2C BIT ABS
L4A7F lda #MLI.E.DUPFILE
L4A74 sec
rts
L4A76 jsr XDOS.CheckPath test for duplicate file name.
bcc L4A7F duplicate name error.
cmp #MLI.E.FNOTFND was it a valid file not found ?
bne L4A74 no, rename error.
jsr XDOS.GetPath syntax pathname of file to be changed.
jsr XDOS.FindFile get all the info on this file.
bcs L4A74 rename error.
jsr XDOS.IsOpened is file in use ?
lda #MLI.E.OPEN anticipate file busy error.
bcs L4A74 error if in use.
lda XDOS.DE.Access test bit which allows rename.
and #$40
bne L4A9D branch if ok to rename
lda #MLI.E.LOCKED otherwise, illegal access.
.HS 2C BIT ABS
L4A98 lda #MLI.E.INCFF
sec
rts
L4A9D lda XDOS.DE.Filename find out which storage type.
and #$F0 strip off name length.
cmp #$D0 is it a directory ?
beq L4AAE then ok.
cmp #$40 is it a seed, sapling or tree ?
bcs L4A98 file incompatible error.
L4AAE jsr XDOS.GetRenPath since both names go into the directory,
bcs L4A74 syntax the new name to get the local
ldy rnptr name address. y = index to local name
ldx XDOS.PathBuf,y length. adj y to last char of new name.
tya
adc XDOS.PathBuf,y
tay
L4ABE lda XDOS.PathBuf,y move local name to dir entry workspace.
sta XDOS.DE.Filename,x
dey
dex
bne L4ABE
lda XDOS.DE.Filename preserve file storage type.
and #$F0 strip off old name length.
tax
ora XDOS.PathBuf,y add in new name's length.
sta XDOS.DE.Filename
cpx #$D0 that file must be changed also.
bne L4AF0 branch if not directory type.
jsr XDOS.ReadGBufDEKeyPtr
bcs L4A74 errors.
ldy rnptr change the header's name to match the
lda XDOS.PathBuf,y owner's new name. get local name length.
ora #$E0 assume it's a header.
jsr XDOS.UpdateHdr
bcs L4A74
L4AF0 jmp XDOS.DE.UpdateNoMTime end by updating all path directories.
*--------------------------------------
XDOS.GetNamPtr ldy #$00 return pointer to 1st name of path.
bit prfxflg is this a prefixed name ?
bmi .1 branch if not.
ldy GP.NEWPFXPTR
.1 ldx #$00
rts
*--------------------------------------
XDOS.UpdateHdr ldx #$00
.1 sta XDOS.GBuf+4,x
inx
iny
lda XDOS.PathBuf,y
bne .1
.DO LOWERCASE=1
jmp XDOS.WriteGBufDir
.ELSE
jmp XDOS.WriteGBuf write changed header block.
.FIN
*--------------------------------------
XDOS.Destroy jsr XDOS.FindFile look for file to be destroyed.
bcs L4B67 if error.
jsr XDOS.IsOpened is it open ?
lda totent
bne L4B64 error if open.
stz reql force proper free count in volume.
stz reqh (no disk access occurs if already proper)
jsr XDOS.CheckFree
bcc L4B39 no errors.
cmp #MLI.E.VOLFULL was error a full disk ?
bne L4B66 no, report error.
L4B39 lda XDOS.DE.Access make sure ok to destroy file.
* and #$80
* bne L4B45
bmi L4B45
lda #MLI.E.LOCKED access error
jsr GP.SYSERR
L4B45 lda GP.DEVNUM last device used.
jsr XDOS.TestWPA test for write protected hardware
bcs L4B67 before going thru deallocation.
lda XDOS.DE.KeyPtr 'detree' needs first block address
sta XDOS.1stBLK
lda XDOS.DE.KeyPtr+1
sta XDOS.1stBLK+1
lda XDOS.DE.Filename find out which storage type.
and #$F0 strip off name length.
cmp #$40 is it a seed, sapling or tree ?
bcc XDOS.DestroyFile branch if it is.
bra XDOS.DestroyDir otherwise, test for directory destroy.
L4B64 lda #MLI.E.OPEN file busy error.
L4B66 sec can't be destroyed
L4B67 rts
*--------------------------------------
XDOS.DestroyFile
sta stortyp destroy a tree file. save storage type.
ldx #$05
* lda #$00 set 'detree' input variables, must be
.1 stz stortyp,x in order: deblock, dtree, dsap, dseed.
dex
bne .1 loop until all zero'd.
lda #$02 this avoids an extra file i/o and pre-
sta dseed+1 vents destruction of any deleted data.
inc delflag don't allow detree to zero index blocks.
jsr detree make trees and saplings into seeds.
dec delflag reset flag.
bcs L4B93 (de-evolution)
L4B85 lda XDOS.1stBLK now deallocate seed.
ldx XDOS.1stBLK+1
jsr XDOS.DeallocAX
bcs L4B93
jsr XDOS.FlushBM
L4B93 pha save possible error code.
stz XDOS.DE.Filename update directory to free entry space.
jsr XDOS.DH.DecFileCnt mark header with one less file.
jsr XDOS.SetVCB.FBLK go update block count in vcb (ignore
jsr XDOS.DE.Update error, if any) and update dir last.
tax save possible new error code,
pla restore possible old error code.
bcc L4BAF branch if last call succeeded.
txa last call failed, use it's error code.
L4BAF cmp #$01 adjust carry accordingly
rts
*--------------------------------------
L4BCD bcc L4B85 branch widened (always taken)
*--------------------------------------
XDOS.DestroyDir cmp #$D0 is this a directory file ?
bne L4C1B no, file incompatible.
jsr XDOS.GetBM make sure a buffer available for bitmap
bcs L4C1A if error.
jsr XDOS.ReadGBufDEKeyPtr read 1st block of directory into XDOS.GBuf
bcs L4C1A
lda XDOS.GBuf+37 do any files exist in this directory ?
ora XDOS.GBuf+38
bne L4C1Abis if so, access error.
L4BF6 sta XDOS.GBuf+4 make it an invalid subdirectory
.DO LOWERCASE=1
jsr XDOS.WriteGBufDir
.ELSE
jsr XDOS.WriteGBuf
.FIN
bcs L4C1A
L4BFE lda XDOS.GBuf+2 get forward link.
cmp #$01 test for null block into carry.
ldx XDOS.GBuf+3 get the rest of the block address.
bne L4C0A branch if not null.
bcc L4BCD was the low part null as well ?
L4C0A jsr XDOS.DeallocAX free this block.
bcs L4C1A
lda XDOS.GBuf+2
ldx XDOS.GBuf+3
jsr XDOS.ReadGBufAX read next DIR block (no need to unpack)
bcc L4BFE loop until all freed
L4C1A rts
L4C1Abis lda #MLI.E.LOCKED access error.
.HS 2C BIT ABS
L4C1B lda #MLI.E.INCFF file incompatible
jsr GP.SYSERR
*--------------------------------------
XDOS.SetFCB.DIRTY
pha mark fcb as dirty so the directory will be flushed on 'flush'.
phy save regs.
ldy XDOS.FCBPtr
lda #$80 mark fcb as dirty.
sta XDOS.FCBs+FCB.DIRTY,y save it back
ply and restore regs.
pla
rts
*--------------------------------------
XDOS.SetVCB.FBLK
ldx XDOS.VCBPtr update block free count in vcb. point to vcb of correct device.
lda deblock get # of blocks recently freed.
adc XDOS.VCBs+VCB.FBLK,x
sta XDOS.VCBs+VCB.FBLK,x update current free block count.
lda deblock+1
adc XDOS.VCBs+VCB.FBLK+1,x
sta XDOS.VCBs+VCB.FBLK+1,x
stz XDOS.VCBs+VCB.BMAPIDX,x force re-scan from 1st bitmap
* lda #0 ?????
rts
*--------------------------------------
MAN
SAVE usr/src/prodos.fx/prodos.s.xdos.e
LOAD usr/src/prodos.fx/prodos.s
ASM
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