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A2osX/ProDOS.FX/ProDOS.S.XDOS.B.txt
Rémy GIBERT dcbcb8d00e Kernel 0.94
2020-07-23 12:18:11 +02:00

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NEW
AUTO 3,1
*--------------------------------------
XDOS.FindDirOrVol
jsr XDOS.FindFileOrVol
bcs .99
lda d_stor
and #$F0
cmp #$D0
beq moventry.CLCRTS
.9 lda #MLI.E.UNSUPST
sec
.99 rts
*--------------------------------------
XDOS.FindFileOrVol
jsr lookfile
bcc moventry
cmp #MLI.E.INVPATH
bne fnderr
clc
rts
moventry ldy h_entln Get FileInfo From Directory Block Buffer
.1 dey
lda (zpt),y move entry into storage
sta d_stor,y
tya
bne .1
moventry.CLCRTS
clc
rts
*--------------------------------------
XDOS.FindFile jsr lookfile see if file exists
bcc moventry
rts
*--------------------------------------
lookfile jsr preproot go find volume
bcs fnderr
bne lookfil0 branch if more than root
lda /gbuf otherwise, report a bad path error
sta zpt+1 (but 1st create a phantom entry
lda #$04 for open)
sta zpt
ldy #$1F move in id and date info
phantm1 lda (zpt),y
sta d_stor,y
dey
cpy #$17
bne phantm1
phantm2 lda rootstuf-$10,y
sta d_stor,y
dey
cpy #$0F
bne phantm2
lda #$D0 fake directory file
sta d_stor
lda gbuf+2 check forward link.
ora gbuf+3 if non-zero, assume full sized directory
bne H37C2 else assume it's the slot 3 /RAM volume
lda #$02 so reset eof and blocks_used fields
sta d_eof+1
lda #$01
sta d_usage
H37C2 lda #MLI.E.INVPATH bad path (carry set)
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 entcntl 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.
cmp entcnth has the last entry been looked at?
beq errfnf yes, give 'file not found' error
bne L37EB or branch always.
L37E2 dec entcnth should be at least one
bpl L37EB so this should be branch always...
errdir lda #MLI.E.BADDIR directory error
fnderr sec
rts
L37EB sta entcntl keep a running count.
lda /gbuf reset indirect pointer
sta zpt+1
lda gbuf+2 get link to next dir block
bne L37FC (if there is one).
cmp gbuf+3 are both zero, i.e. no link? if so,
beq errdir then not all entries were acct'd for.
L37FC ldx gbuf+3 acc has value for block# (low).
jsr XDOS.ReadGBufAX go read the next linked directory.
bcc L37C9 if no error.
rts return error in acc.
errfnf lda nofree was any free entry found?
bne fnf0
lda gbuf+2 test link
bne L3814
cmp gbuf+3 if both are 0 then give up.
beq fnf0 report 'not found'.
L3814 sta d_entblk
lda gbuf+3
sta d_entblk+1 assume 1st entry of next block
lda #$01 is free for use.
sta d_entnum mark as valid (for create)
sta nofree
fnf0 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 #$00 be sure this is a directory entry.
lda (zpt),y high nibble will tell.
and #$F0
cmp #$D0 is it a subdirectory?
bne errpath1 error if not.
ldy #$11 get address of 1st subdirectory block
lda (zpt),y
sta bloknml (no checking done for a valid block#)
iny
sta d_head save as file's header block too
lda (zpt),y
sta bloknml+1
sta d_head+1
jsr XDOS.ReadGBuf read subdirectory into gbuf.
bcs lookfil0.RTS if error.
lda gbuf+37 get the # of files contained in this
sta entcntl directory.
lda gbuf+38
sta entcnth
*--------------------------------------
* Check if $75 at VOL/DIR entry + $14
* (8 bytes reserved)
*--------------------------------------
.DO LOWERCASE=0
lda 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 movhed0 move directory info.
jmp lookfil0 do next local pathname.
movhed0 ldx #9 move this directory info
.1 lda gbuf+$1C,x
sta h_credt,x
dex
bpl .1
.DO ACL=1
lda gbuf+$14
cmp #$57
bne .20
ldx #7
.2 lda gbuf+$14,x
sta h_acl,x
dex
bpl .2
.20 .FIN
lda gbuf+4 if this is root, then nothing to do
and #$F0
eor #$F0 test header type.
beq .8 branch if root
ldx #$03 otherwise, save owner info about
.3 lda gbuf+$27,x this header.
sta own_blk,x
dex
bpl .3
.8 rts
*--------------------------------------
filfound lda h_maxent figure out which entry # this is
sec
sbc cntent max entries - count entries + 1
adc #$00 = entry # (carry was set)
sta d_entnum
lda bloknml and indicate block # of this directory
sta d_entblk
lda bloknml+1
sta d_entblk+1
clc
rts
*--------------------------------------
XDOS.LookupNameInDirBlk
lda h_maxent reset count of files per block
sta cntent
lda /gbuf
sta zpt+1
lda #$04
L38C1 sta zpt reset indirect pointer to gbuf
bcs L38F8 branch if this block contains a header
ldy #$00
lda (zpt),y get length of name in directory.
bne isname branch if there is a name.
lda nofree test if a free entry has been declared.
bne L38F8 yes, inc to next entry.
jsr filfound set address for current entry.
inc nofree indicate a free spot has been found.
bra L38F8
isname 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 pathbuf,x are both names the same length?
bne L38F8 no, inc to next entry.
cmpname inx (first) next letter index
iny
.DO LOWERCASE=1
phy
cpy #8 CS if MIN_VERSION to use
ldy #$1D MIN_VERSION
lda (zpt),y
bpl .4 no lowercase information
bcs .1
ply
and whichbit,y
beq .5 UPPERCASE
bra .2
.1 dey VERSION
lda (zpt),y
ply
and whichbit-8,y
beq .5
.2 lda (zpt),y
jsr XDOS.ToLower
bra .6
.4 ply
.FIN
.5 lda (zpt),y compare names letter by letter
.6 cmp pathbuf,x
bne L38F8
dec namcnt all letters compared?
bne cmpname no, continue.
clc a match is found.
noname rts
L38F8 dec cntent checked all entries in this block?
sec
beq noname yes, no name match.
lda h_entln add entry length to current pointer
clc
adc zpt
bcc L38C1 branch if still in 1st page.
inc zpt+1 look on 2nd page.
clc carry should always be clear before
bra L38C1 looking at next.
*--------------------------------------
preproot jsr findvol search vcb's and dev's for spec'd volume
bcs novolume
.DO ACL=1
ldx #$4A
.ELSE
ldx #$42 zero out directory temps
.FIN
.1 stz own_blk,x and owner info
dex
bpl .1
lda devnum setup device # for this directory
sta d_dev
jsr movhed0 setup other header info from directory
ldy #$01 in gbuf and clean up misc info.
ldx vcbptr
inx
.2 lda VCBs+VCB.TBLK,x misc info includes
sta h_tblk,y total # of blocks,
lda VCBs+VCB.BMAP,x the address of the 1st bitmap,
sta h_bmap,y
lda bloknml,y directory's disk address,
sta d_head,y
lda h_fcnt,y and setting up a counter for the # of
sta entcntl,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 pathbuf,y in the path.
sec
adc namptr if this addition results in zero,
tay then prefixed directory has been moved
bne L395F to another device. branch if not.
lda devnum revise devnum for prefixed directory
sta p_dev
L395F lda pathbuf,y test for end of name.
clc no errors
novolume rts
*--------------------------------------
findvol lda #$00
ldy preflag 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 vnptr and save.
sta devnum zero out dev# until vcb located.
L3975 pha acc now used as vcb lookup index.
tax index pointer to x.
lda VCBs,x get vcb volume name length.
bne L3987 branch if claimed vcb to be tested.
L397C ldy vnptr 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 pathbuf,y is it the same as requested vol name?
bne L397C branch if not
inx
iny next character
lda VCBs,x
dec namcnt last character?
bpl L398A if not.
plx restore pointer to matching vcb.
stx vcbptr save it for future reference.
lda VCBs+VCB.DEV,x get it's device #
sta devnum and save it.
stz bloknml+1 assume prefix is not used and
lda #$02 that root directory is to be used.
sta bloknml
lda vnptr = 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 pathbuf,y inc to next dir in prefix path.
bcc L39AC branch if another dir in prefix.
lda p_blok volume verification will occur at
sta bloknml subdirectory level.
lda p_blok+1
sta bloknml+1
* verify volume name
L39C2 jsr XDOS.ReadGBuf read in directory (or prefix dir)
bcs L39CC if error then look on other devices.
jsr XDOS.CheckVolName compare dir name with path name.
bcc L39F0 if they match, stop looking.
L39CC ldx vcbptr check if current (matched) vcb is active
lda VCBs+VCB.OFCNT,x i.e. does it have open files?
bne L39ED report not found if active.
L39D4 lda vnptr make path ptr same as volume ptr
sta namptr
jsr mvdevnums copy all device #'s to be examined.
lda devnum log current device 1st before searching
bne L39F1 others.
L39E2 ldx 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 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 devlst (/RAM).
L39FE sta devnum preserve device to be checked next.
stz loklst,x mark this one as tested.
jsr fnddvcb find vcb that claims this dev (if any).
bcs L3A29 branch if vcb full.
ldx vcbptr did fndvcb find it or return free vcb?
lda VCBs,x
beq L3A16 if free vcb.
lda 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 gbuf
ldx #$00
jsr XDOS.ReadGBufAX
bcs L39E2 ignore if unable to read.
jsr logvcb go log in volume name.
bcs L39E2 look at next if non-xdos disk mounted.
jsr XDOS.CheckVolName is this the volume ?
bcs L39E2 if not
L3A29 rts
*--------------------------------------
mvdevnums ldx DEVCNT copy all dev #'s to be checked.
L3A2D lda DEVLST,x active device list.
and #$F0 strip device type info.
sta loklst,x copy them to a temp workspace
dex
bpl L3A2D
ldx DEVCNT
rts
*--------------------------------------
fnddvcb lda #$00 look for vcb with this device#
ldy #$FF
L3A40 tax new index to next vcb
lda VCBs+VCB.DEV,x check all devnums
cmp devnum is this the vcb?
bne L3A4E if not
stx vcbptr
clc indicates found
rts
L3A4E lda VCBs,x is this a free vcb?
bne L3A57 if not
iny
stx vcbptr
L3A57 txa
clc inc index to next vcb
adc #VCB
bcc L3A40
tya any free vcb's available?
bpl L3A79 yes
lda #$00 look for an entry to kick out
L3A62 tax
lda VCBs+VCB.OFCNT,x any open files?
beq L3A70 no, kick this one out.
txa next vcb
clc
adc #VCB
bcc L3A62
lda #MLI.E.VCBFULL all vcb entries have open files
* sec
rts
L3A70 stx vcbptr save entry index.
stz VCBs,x free this entry
stz VCBs+VCB.DEV,x
L3A79 clc no error.
rts
*--------------------------------------
XDOS.CheckVolName
ldx #$00 index to directory name.
ldy namptr index to pathname.
lda gbuf+4 get dir name length and type.
cmp #$E0 is it a directory?
bcc L3A90 if not.
and #$0F isolate name length and
sta namcnt save as a counter.
bne L3A95 branch if valid length.
L3A90 sec indicate not found
rts
L3A92 .DO LOWERCASE=1
lda gbuf+$21 MIN_VERSION
bpl .8
cpx #8
bcs .1
and whichbit,x
beq .8
bra .2
.1 lda gbuf+$20 VERSION
and whichbit-8,x
beq .8
.2 lda gbuf+4,x
jsr XDOS.ToLower
bra L3A95
.8 .FIN
lda gbuf+4,x next char
L3A95 cmp pathbuf,y
bne L3A90 if not the same.
inx check next char
iny
dec namcnt
bpl L3A92 if more to compare.
clc match found
XDOS.CheckVolName.RTS
rts
*--------------------------------------
logvcb ldx vcbptr previously logged in volume?
lda VCBs,x (acc = 0?)
beq logvcb1 no, go prepare vcb.
jsr cmpvcb does vcb match vol read?
bcc XDOS.CheckVolName.RTS yes, do not disturb.
logvcb1 ldy #VCB-1 zero out vcb entry
L3AB2 stz VCBs,x
inx
dey
bpl L3AB2
lda gbuf pointer to previous dir block
ora gbuf+1 must be null
bne tsterr
lda gbuf+4 test for header
and #$E0
cmp #$E0
bne tsterr
jsr tstdupvol does a duplicate with open files
bcs L3B04 already exist? branch if yes.
lda gbuf+4 move volume name to vcb.
and #$0F strip root marker
tay
pha
ora vcbptr
tax
L3ACE .DO LOWERCASE=1
jsr XDOS.GetVolNameCharGBufY
.ELSE
lda gbuf+4,y
.FIN
sta VCBs,x
dex
dey
bne L3ACE
pla get length again
sta VCBs,x and save.
lda devnum last device used.
sta VCBs+VCB.DEV,x save device # and
* lda bloknml save address of root directory.
* sta VCBs+VCB.ROOT,x
* lda bloknml+1
* sta VCBs+VCB.ROOT+1,x
* lda gbuf+39 save address of the 1st bitmap.
* sta VCBs+VCB.BMAP,x
* lda gbuf+40
* sta VCBs+VCB.BMAP+1,x
* lda gbuf+41 total # of blocks on this unit.
* sta VCBs+VCB.TBLK,x
* lda gbuf+42
* sta VCBs+VCB.TBLK+1,x
ldy #0
.1 lda gbuf+39,y
sta VCBs+VCB.BMAP,x copy BMAP+TBLK
iny
inx
cpy #4
bne .1
L3B04 clc indicate logged if possible
rts
tsterr lda #MLI.E.NOTPRODOS not tree or dir, unrecognized type
sec
rts
*--------------------------------------
cmpvcb lda gbuf+4 with name in directory.
and #$0F
cmp VCBs,x are they the same length?
stx xvcbptr (see rev note #23)
bne L3B1E if not the same.
tay
ora xvcbptr
tax
L3B18 .DO LOWERCASE=1
jsr XDOS.GetVolNameCharGBufY
.ELSE
lda gbuf+4,y
.FIN
cmp VCBs,x
L3B1E sec anticipate different names.
bne L3B26 if not the same.
dex
dey
bne L3B18
clc indicate match.
L3B26 ldx xvcbptr offset to start of vcb (rev note #23)
rts
*--------------------------------------
tstdupvol lda #$00 check for other logged in volumes with the same name.
L3B2C tax
jsr cmpvcb
bcs L3B41 if no match.
lda VCBs+VCB.OFCNT,x test for any open files.
bne L3B4B cannot look at this volume.
stz VCBs,x take duplicate offline if no open files
stz VCBs+VCB.DEV,x
* clc ok to log in new volume.
rts
L3B41 txa index to next vcb
* sec
adc #VCB-1
bcc L3B2C branch if more to check
L3B49 clc
rts
L3B4B sta duplflag duplicate has been found.
stx vcbentry save pointer to conflicting vcb.
sec error.
rts
*--------------------------------------
tstfrblk ldx vcbptr test if enough free blocks available for request.
lda VCBs+VCB.FBLK+1,x check if proper count for this volume.
ora VCBs+VCB.FBLK,x
bne L3BAD branch if count is non-zero.
tkfrecnt jsr cntbms get # of bitmaps
sta bmcnt and save.
stz scrtch start count at 0
stz scrtch+1
lda #$FF mark 'first free' temp as unknown
sta nofree
jsr upbmap update volume bitmap.
bcs L3BC1 if error.
ldx vcbptr get address of 1st bitmap
lda VCBs+VCB.BMAP,x
sta bloknml
lda VCBs+VCB.BMAP+1,x
sta bloknml+1
L3B81 jsr XDOS.ReadGBuf use general buffer for temp space to
bcs L3BC1 count free blocks (bits).
jsr count
dec bmcnt was that the last bitmap?
bmi L3B96 if so, go change fcb so not done again.
inc bloknml
bne L3B81
inc bloknml+1
bra L3B81
L3B96 ldx vcbptr mark which block had 1st free space
lda nofree
bmi L3BBE if no free space was found.
sta VCBs+VCB.BMAPIDX,x update the free count.
lda scrtch+1
sta VCBs+VCB.FBLK+1,x update volume control byte.
lda scrtch
sta VCBs+VCB.FBLK,x
L3BAD lda VCBs+VCB.FBLK,x compare total available free blocks
sec on this volume.
sbc reql
lda VCBs+VCB.FBLK+1,x
sbc reqh
bcc L3BBE
clc
rts
L3BBE lda #MLI.E.VOLFULL
sec
L3BC1 rts
count ldy #$00
L3BC4 lda gbuf,y bit pattern.
beq L3BCC don't count
jsr cntfree
L3BCC lda gbuf+$100,y do both pages with same loop
beq L3BD4
jsr cntfree
L3BD4 iny
bne L3BC4 loop until all 512 bytes counted.
bit nofree has 1st block w/free space been found?
bpl L3BEE if yes.
lda scrtch test to see if any blocks were counted
ora scrtch+1
beq L3BEE branch if none counted.
jsr cntbms get total # of maps.
sec subtract countdown from total bitmaps
sbc bmcnt
sta nofree
L3BEE rts
cntfree asl count the # of bits in this byte
bcc L3BFA
inc scrtch
bne L3BFA
inc scrtch+1
L3BFA ora #$00
bne cntfree loop until all bits counted
rts
cntbms ldx vcbptr
ldy VCBs+VCB.TBLK+1,x return the # of bitmaps
lda VCBs+VCB.TBLK,x possible with the total count
bne L3C0B found in the vcb.
dey adj for bitmap block boundary
L3C0B tya
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
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