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A2osX/ProDOS.FX/ProDOS.S.XDOS.E.txt
Rémy GIBERT 63486817ca Kernel 0.94+
2021-04-08 22:30:18 +02:00

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NEW
AUTO 3,1
*--------------------------------------
XDOS.Close ldy #$01 close all ?
lda (A3L),y
bne XDOS.CloseOne no, just one of them.
sta cferr clear global close error.
* lda #$00 start at the beginning.
L4654 sta fcbptr save current low byte of pointer.
tax get the level at which the file
lda FCBs+FCB.FLEVEL,x was opened.
cmp flevel if file's level is < global level
bcc L4675 then don't close.
lda FCBs+FCB.ID,x is this reference file open ?
beq L4675 no, try next.
jsr flush2 clean it out...
bcs L46B6 return flush errors.
jsr close2 update fcb & vcb
ldy #$01
lda (A3L),y
beq L4675 no error if close all.
bcs L46B6 close error.
L4675 lda fcbptr inc pointer to next fcb
clc
adc #FCB
bcc L4654 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 flush1 flush file 1st (including updating bitmap)
* bcs L46B6 branch if errors.
bcc close2
php
pha
jsr close2
pla
plp
rts
close2 ldx fcbptr
lda FCBs+FCB.BUFID,x release file buffer
jsr relbuffr
bcs L46B6
jsr XDOS.FCBDevIDSelect
stz FCBs,x free fcb too
jsr XDOS.FindVCBForDevNum get vcb pointer.
dec 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 (A3L),y
bne flush1 no, just one of them.
sta cferr clear global flush error.
* lda #$00 start at the beginning.
L46C3 sta fcbptr save current low byte of pointer.
tax index to ref #.
lda FCBs,x is this reference file open ?
beq L46D1 no, try next.
jsr flush2 clean it out...
bcs L46E6 return anty errors.
L46D1 lda 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.
flush1 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 FCBs+FCB.ACCESS,x test to see if file is modified.
and #$02 is it write enabled ?
beq L46D9 branch if 'read only'
lda 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 wfcbdat 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.
jsr wfcbidx
bcs L46E6 return any errors.
L471C ldy #0
jsr XDOS.FCBDevIDSelect X = FCBPtr
L4723 lda FCBs+FCB.DEVID,x note: this code depends on the defined
sta d_dev,y order of the file control block and the
inx temporary directory area in 'work space'
iny
cpy #6
bne L4723
lda d_head read the directory header for this file
ldx d_head+1
.DO LOWERCASE=1
jsr XDOS.ReadGBufAXDir
.ELSE
jsr XDOS.ReadGBufAX read DIR into the general purpose buffer.
.FIN
bcs L46E6 if error.
jsr movhed0 move header info.
lda d_entblk get address of directory block that
ldx d_entblk+1 contains the file entry.
cmp d_head test to see if it's the same block the
bne .1 header is in. branch if not.
cpx d_head+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 entcalc set up pointer to entry.
jsr moventry move entry to temp entry buffer in
ldx fcbptr 'work space'. update 'blocks used' count
lda FCBs+FCB.UBLK,x
sta d_usage
lda FCBs+FCB.UBLK+1,x
sta d_usage+1
ldy #0 and move in end of file mark whether
L476C lda FCBs+FCB.EOF,x needed or not.
sta d_eof,y
iny
cpy #$03 move all 3 bytes
beq L4780
lda FCBs+FCB.1stBLK,x also move in the address of the file's
sta d_filid,y first block since it might have changed
inx since the file first opened.
bne L476C branch always.
L4780 ldx fcbptr
lda FCBs+FCB.STYPE,x the last thing to update is storage
asl type (y=fcbptr+2). shift into high
asl nibble.
asl
asl
sta scrtch
lda d_stor get old type byte (might be the same).
and #$0F strip off old type,
ora scrtch add in the new type
sta d_stor and put it away.
jsr drevise go update directory.
bcs glberr error.
ldx fcbptr mark
stz FCBs+FCB.DIRTY,x fcb/directory as undirty.
lda d_dev see if bitmap should be written.
cmp bmadev is it in same as current file ?
bne L47B2 yes, put it on the disk if necessary.
jsr upbmap go put it away.
bcs glberr flush error
L47B2 clc
rts
*--------------------------------------
* report error only if not a close all or flush all
*--------------------------------------
glberr ldy #$01
pha
lda (A3L),y
bne L47C1 not an 'all' so report now
clc
pla
sta cferr save for later
rts
L47C1 pla
rts
*--------------------------------------
XDOS.FCBDevIDSelect
ldx fcbptr
lda FCBs+FCB.DEVID,x
sta devnum
rts
*--------------------------------------
XDOS.SetFCBSType
lsr
lsr
lsr
lsr
ldy fcbptr and save it in fcb.
sta FCBs+FCB.STYPE,y
rts
*--------------------------------------
XDOS.ClrFCBStatus
ldy fcbptr clear allocation states for data block
lda FCBs+FCB.F,y and both levels of indexes/
and #$F8
sta FCBs+FCB.F,y indicates that either they exist now
rts or unnecessary for current position.
*--------------------------------------
XDOS.GetFCBStatus
ldx fcbptr index to fcb.
lda FCBs+FCB.F,x return status byte.
rts
*--------------------------------------
XDOS.SetFCBStatus
ldx fcbptr
ora FCBs+FCB.F,x
sta FCBs+FCB.F,x
rts
*--------------------------------------
L47CA lda #MLI.E.LOCKED access error
sec
L47CD rts
*--------------------------------------
XDOS.SetEOF jsr gfcbstyp 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 FCBs+FCB.ACCESS,y
and #$02 is write enabled to set new eof ?
beq L47CA no, access error.
jsr tstwprot hardware write protected ?
bcs L47CA yes, access error.
ldy 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 FCBs+FCB.EOF,y
sta oldeof,x
dey
dex
bpl L47EF
ldy #$04
ldx #$02
L47FD lda (A3L),y position mark to new eof
sta tposll,x
dey
dex
bpl L47FD
ldx #$02 point to 3rd byte.
L4808 lda oldeof,x see if eof moved backwards so blocks
cmp tposll,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 fcbptr place new end of file into fcb
inx
inx
L481C lda (A3L),y
sta FCBs+FCB.EOF,x
dex
dey
cpy #$02 all 3 bytes moved ?
bcs L481C no.
jmp fcbused mark fcb as dirty.
purge jsr flush1 make sure file is current
bcs L47CD
ldx datptr+1 pointer to index block
inx
inx
stx zpt+1 (zero page conflict with dir buf ptr)
ldx datptr
stx zpt
ldy fcbptr check if eof < mark
iny
iny
ldx #$02
L4840 lda FCBs+FCB.MARK,y
cmp tposll,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 fcbptr
ldx #$00
L4853 lda tposll,x fake position, correct position will
sta FCBs+FCB.MARK,y be made below...
iny
inx
cpx #$03 move all 3 bytes
bne L4853
L485F jsr tkfrecnt force free block count before releasing
lda tposll blocks. prepare for purge of excess...
sta dseed all blocks and bytes beyond new eof
lda tposlh must be zero'd
sta dsap
and #$01
sta dseed+1
lda tposhi
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 fcbptr also must pass file's 1st block address.
lda FCBs+FCB.1stBLK,y
sta firstbl
lda FCBs+FCB.1stBLK+1,y
sta firstbh
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 fcbptr
ldx #$00
L48C2 lda firstbl,x
sta FCBs+FCB.1stBLK,y move in possible new first file block
lda FCBs+FCB.UBLK,y address. adjust usage count also
sbc deblock,x
sta FCBs+FCB.UBLK,y
iny
inx
txa
and #$01 test for both bytes adjusted
bne 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 dvcbrev nothing allocated, update total blocks
ldy fcbptr in fcb and correct position.
iny
iny
ldx #$02
L48F2 lda FCBs+FCB.MARK,y tell 'rdposn' to go to correct
sta tposll,x
eor #$80 position from incorrect place.
sta FCBs+FCB.MARK,y
dey
dex
bpl L48F2
jsr rdposn go to correct position.
bcc L490D if no error.
tax otherwise, report latest error.
pla
plp
txa restore latest error code to stack
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 flush1 then go do the flush.
bcc L491C branch if no error.
tax save latest error.
pla clean previous error off stack
plp
txa and restore latest error to stack.
sec show error condition.
php restore error status to stack
pha and the error code.
L491C pla report any errors that may have
plp appeared.
rts
*--------------------------------------
XDOS.GetEOF ldx fcbptr index to end of file mark
ldy #$02 and index to user's call parameters
L4924 lda FCBs+FCB.EOF,x
sta (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 (A3L),y on or off ?
ldx fcbptr it will be 0 if off.
sta FCBs+FCB.NLMASK,x set new line mask
iny
lda (A3L),y and move in 'new-line' byte
sta 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 d_stor transfer bytes from internal order to
lsr call spec via 'inftabl' translation
lsr table but first change storage type to
lsr external (low nibble) format.
lsr
sta d_stor
ldy #$11 index to last of user's spec table.
.2 lda inftabl-3,y
and #$7F strip bit used by setinfo
tax
lda d_stor,x move directory info to call spec. table
sta (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 L49CF if error.
lda bubit see if backup bit can be cleared
eor #$20
and d_attr
and #$20
sta bkbitflg or preserve current...
ldy #$0D init pointer to user supplied list.
L49B9 ldx inftabl-3,y get index to corresponding 'd.' table.
bmi L49C3 branch if parameter can't be set.
lda (A3L),y
sta d_stor,x
L49C3 dey has user's request been satisfied ?
cpy #$03
bcs L49B9 no, move next byte.
and #$18 make sure no illegal access bits were
beq L49D0 set !! branch if legal access.
lda #MLI.E.LOCKED otherwise, access error.
sec
L49CF rts
L49D0 ldy #$0B
lda (A3L),y was clock null input ?
bne XDOS.SetFileInfoEx.8
jmp drevise update with clock also...
*--------------------------------------
XDOS.SetFileInfoEx
jsr XDOS.FindFile
bcs XDOS.GetFileInfoEx.RTS
ldx #S.FIEX.BLKPTR+2-1
ldy #S.FIEX.BLKPTR+2-1+3
.2 lda (A3L),y
sta d_stor,x
dey
dex
bpl .2
XDOS.SetFileInfoEx.8
jmp drevise1
*--------------------------------------
XDOS.GetFileInfoEx
jsr XDOS.FindFile
bcc .1
jsr XDOS.GetFileInfoVol
bcs .9
.1 ldx #S.FIEX.BLKPTR+2-1
ldy #S.FIEX.BLKPTR+2-1+3
.2 lda d_stor,x
sta (A3L),y
dey
dex
bpl .2
ldx #7
ldy #S.FIEX.ACL+7+3
.3 lda h_acl,x
sta (A3L),y
dey
dex
bpl .3
* clc
.9
XDOS.GetFileInfoEx.RTS
rts
*--------------------------------------
XDOS.GetFileInfoVol
cmp #MLI.E.INVPATH was it a root directory file ?
sec (in case of no match)
bne .9 if not, then error.
lda #$F0
sta d_stor for get info, report proper storage type
stz reql force a count of free blocks.
stz reqh
ldx vcbptr
jsr tkfrecnt get a fresh count of free blocks on
ldx vcbptr this volume.
lda VCBs+VCB.FBLK+1,x return total blocks and total in use.
sta reqh 1st transfer 'free' blocks to zpage
lda VCBs+VCB.FBLK,x for later subtraction to determine
sta reql the 'used' count.
lda VCBs+VCB.TBLK+1,x transfer to 'd.' table as aux id
sta d_auxid+1 (total block count is considered aux id
pha for the volume)
lda VCBs+VCB.TBLK,x
sta d_auxid
sec subtract and report the number of
sbc reql blocks 'in use'
sta d_usage
pla
sbc reqh
sta d_usage+1
clc
.9 rts
*--------------------------------------
XDOS.ACL jsr XDOS.FindDirOrVol
bcs .9
jsr XDOS.ReadGBuf_d_frst
bcs .9
ldx #7
ldy #S.FIEX.ACL+3
lda (A3L),y
beq .2
ldy #S.FIEX.ACL+7+3
.1 lda (A3L),y
sta gbuf+$14,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 gbuf+$14,x
sta (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 pathbuf find out if only rootname for new name
iny
lda pathbuf,y must be $FF if volume name only.
bne L4A72 if not single name
ldx vcbptr check for open files before changing.
lda VCBs+VCB.OFCNT,x
beq L49FF if volume not busy.
lda #MLI.E.OPEN file busy error.
L49FD sec
rts
L49FF ldy #0 get newname's length
lda pathbuf,y
ora #$F0 (root file storage type)
jsr XDOS.UpdateHdr update root directory.
bcs .9 rename error.
ldy #$00
ldx vcbptr update vcb also.
.1 lda pathbuf,y move new name to vcb.
beq .8
sta VCBs,x
iny next character
inx
bra .1
.8
* clc no errors
.9 rts
*--------------------------------------
XDOS.RenameFileDir
jsr getnamptr set y = 1st char of path, x = 0.
L4A21 lda pathbuf,y move original name to gbuf
sta gbuf,x for later comparison to new name.
bmi L4A2D if last character has been moved
iny otherwise, get the next one.
inx
bra L4A21
L4A2D jsr XDOS.GetRenPath get new name syntaxed.
bcs L4A74 rename error.
jsr getnamptr set y = path, x = 0.
lda pathbuf,y now compare new name with old name
L4A38 cmp gbuf,x to make sure they are in the same dir.
php save result of comparison.
and #$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 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 pathbuf,y get last name length.
sec
adc rnptr
tay
lda pathbuf,y this byte should be $00 !
bne L4A72 if not, bad path error.
ldx namptr index to last of original name
lda gbuf,x
sec
adc namptr
tax
lda gbuf,x this byte should also be $00.
beq L4A76 if so, continue processing.
L4A72 lda #MLI.E.INVPATH bad pathname error.
L4A74 sec
rts
L4A76 jsr XDOS.CheckPath test for duplicate file name.
bcs L4A7F branch if file not found, which is ok !!
lda #MLI.E.DUPFILE duplicate name error.
sec
rts
L4A7F 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 tstopen is file in use ?
lda #MLI.E.OPEN anticipate file busy error.
bcs L4A74 error if in use.
lda d_attr test bit which allows rename.
and #$40
bne L4A9D branch if ok to rename
lda #MLI.E.LOCKED otherwise, illegal access.
.HS 2C BIT ABS
L4A98 lda #MLI.E.INCFF
L4A9B sec
rts
L4A9D lda d_stor find out which storage type.
and #$F0 strip off name length.
cmp #$D0 is it a directory ?
beq L4AAE then ok.
cmp #$40 is it a seed, sapling or tree ?
bcs L4A98 file incompatible error.
L4AAE jsr XDOS.GetRenPath since both names go into the directory,
bcs L4A74 syntax the new name to get the local
ldy rnptr name address. y = index to local name
ldx pathbuf,y length. adj y to last char of new name.
tya
adc pathbuf,y
tay
L4ABE lda pathbuf,y move local name to dir entry workspace.
sta d_stor,x
dey
dex
bne L4ABE
lda d_stor preserve file storage type.
and #$F0 strip off old name length.
tax
ora pathbuf,y add in new name's length.
sta d_stor
cpx #$D0 that file must be changed also.
bne L4AF0 branch if not directory type.
jsr XDOS.ReadGBuf_d_frst
bcs L4A74 errors.
ldy rnptr change the header's name to match the
lda pathbuf,y owner's new name. get local name length.
ora #$E0 assume it's a header.
jsr XDOS.UpdateHdr
bcs L4A74
L4AF0 jmp drevise1 end by updating all path directories.
*--------------------------------------
XDOS.UpdateHdr ldx #$00
.1 sta gbuf+4,x
inx
iny
lda pathbuf,y
bne .1
.DO LOWERCASE=1
jmp XDOS.WriteGBufDir
.ELSE
jmp XDOS.WriteGBuf write changed header block.
.FIN
*--------------------------------------
getnamptr ldy #$00 return pointer to 1st name of path.
bit prfxflg is this a prefixed name ?
bmi .1 branch if not.
ldy newpfxptr
.1 ldx #$00
rts
*--------------------------------------
MAN
SAVE usr/src/prodos.fx/prodos.s.xdos.e
LOAD usr/src/prodos.fx/prodos.s
ASM
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