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A2osX/ProDOS.FX/ProDOS.S.SEL1.txt

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NEW
AUTO 3,1
*--------------------------------------
* object code = sel_1
* Bird's Better Bye at org = dispadr
*--------------------------------------
SEL1.START cld
bit RROMBNK2 read ROM
stz softev
lda #$10 set reset vector to 'dispadr'
sta softev+1
jsr setpwrc create power-up byte
lda #$A0
jsr $C300 initialize 80 column text card
* set up memory bitmap in global page
ldx #0
jsr GP.TOOLBOX reset MEMTABL
lda #$02
sta smparms init set mark parms pcount.
*--------------------------------------
* drive selector
*--------------------------------------
ldx DEVCNT get device count and
.1 lda DEVLST,x
and #$F0
cmp DEVNUM
beq SEL1.VolName
dex
bra .1
SEL1.NextVol ldx lstpntr get device list pointer.
bne .1
ldx DEVCNT get device count.
inx
.1 dex
lda DEVLST,x get unit number from list.
SEL1.VolName stx lstpntr
sta ol_unit store unit number for online.
jsr MLI
.DA #MLIONLINE
.DA ol_parms
bcs SEL1.NextVol error check.
stz dlevel haven't read root directory yet.
lda pbuf+1 load description byte.
and #$0F mask for name length.
beq SEL1.NextVol if 0, then try next unit.
adc #$02 add 2 to length.
tax name length in x.
vnam1 stx pbuf save the name length
lda #$2F '/'
sta pbuf+1 slash before and
sta pbuf,x after name.
stz pbuf+1,x null after complete name.
* open and read directory
jsr MLI
.DA #MLIOPEN
.DA op_parms
bcc L5D7F good open.
lda dlevel trying to open root directory ?
beq SEL1.NextVol yes, just move to next volume.
jsr bell1 no, generate bell tone
jsr popdir and stay at same level.
stx pbuf
jmp keyloop
L5D7F inc dlevel
stz filecount zero file count.
lda op_refn get file reference number
sta rd_refn store in read
sta sm_refn and setmark parm lists.
lda #$2B set read parm list for
sta rd_reqlen directory header length.
stz rd_reqlen+1
jsr SEL1.ReadEntry read directory
bcs L5DB3
ldx #$03
L5D9A lda sysentry+$23,x copy directory info
sta entlen,x to zero page.
dex
bpl L5D9A
sta rd_reqlen put entry length in read parm list.
lda #$01 set block file counter to 1.
sta blkfl
stz fpos_mid zero out msb's of file position
stz fpos_hi in setmark parm list.
lda filecnt any files in directory ?
ora filecnt+1
bne L5DB5 if so, continue
L5DB3 bra L5E29 else go close directory file.
L5DB5 bit filecnt+1 check msb of file count.
bmi L5DB3 if set then done.
L5DB9 lda fpos_mid get mid byte of setmark file position.
and #$FE reset lsb
sta fpos_mid and save.
ldy blkfl block file counter
lda #$00
cpy entblk have we read all entries in this block ?
bcc L5DCE if not, continue.
tay if so, zero y-reg and
sty blkfl reset block counter / flag
inc fpos_mid
* set up setmark parameters for next file to be read.
* if transfer to second sector, handle it.
L5DCC inc fpos_mid
L5DCE dey decrement file block counter
clc
bmi L5DD8
adc entlen add entry length to acc.
bcc L5DCE determine if we flopped into 2nd half of
bcs L5DCC block, if so inc mid byte position.
L5DD8 adc #$04 add 4 and put in
sta fpos_lo low byte of setmark.
jsr MLI call mli
.DA #MLISETMARK
.DA #smparms parameters address = $0060
.HS 00
bcs L5DB3 error
jsr SEL1.ReadEntry
bcs L5DB3 error.
inc blkfl increase count of files read.
lda sysentry file type/length.
and #$F0 mask off high nibble.
beq L5DB9 deleted file, try next one.
dec filecnt decrement low file count.
bne L5DF8
dec filecnt+1 and high if necessary.
L5DF8 ror sysentry+$1E check access bit.
bcc L5DB5 if no read, try next file.
lda sysentry+$10 get file type.
cmp #$0F directory file ?
beq L5E08 then continue.
cmp #$FF system file ?
bne L5DB5 no, read next file.
L5E08 ldx filecount get valid files read.
cpx #$80 if greater than size of filename buffer
bcs L5E29 then close directory
sta filetyps,x else store filetype in zero page
jsr namecalc and go set up storage area.
ldy #$0F
L5E15 lda sysentry,y get byte of filename
sta (fnstore),y store in directed area
dey
bpl L5E15
iny y = 0
and #$0F mask off low nibble (name length)
sta (fnstore),y restore in name buffer
inc filecount increment valid file counter
bne L5DB5 get next file (branch always)
L5E26 jmp SEL1.NextVol error. try next unit.
L5E29 jsr MLI close directory file
.DA #MLICLOSE
.DA cl_parms
bcs L5E26 error.
jsr settxt use full screen for windows
jsr home
lda #$17 cursor at bottom of screen.
jsr TABV set vertical position.
ldy #$00
lda #$14 horizontal position.
jsr sethorz print message.
jsr homecurs cursor to upper/left.
ldx #$00
L5E48 lda pbuf+1,x
beq showfiles
jsr output
inx
bne L5E48
showfiles stz valcnt
stz topname init top filename index.
lda filecount # of valid files.
beq keyloop if no files.
cmp #$15 more than what will fit on screen ?
bcc L5E61 no.
lda #$14 limit to 20 files on the screen.
L5E61 sta gp_cnt
lda #$02 set window dimensions
sta wndtop
sta wndlft
lda #$16
sta wndwdth
sta wndbot
L5E6F jsr nameprnt output filename to screen
inc valcnt
dec gp_cnt file counter.
bne L5E6F continue printing names.
stz valcnt
beq L5EAA if last file, it needs to be inverse.
uparrow jsr nameprnt print old name in normal.
ldx valcnt get old name number.
beq L5EAA if already at the top name
dec valcnt else fix index.
lda cv current cursor line.
cmp #$02 at top line of window ?
bne L5EAA no, move up normally.
dec topname fix offset index
lda #$16 else sroll windows down a line.
bne L5EA7 branch always.
dnarrow jsr nameprnt print old name in normal.
ldx valcnt get old name number.
inx add one.
cpx filecount
bcs L5EAA if already at last filename
stx valcnt else update index.
lda cv current cursor line.
cmp #$15 at bottom line of window ?
bne L5EAA no, move cursor normally.
inc topname update offset index
lda #$17 else scroll up a line.
L5EA7 jsr cout
L5EAA jsr setinv set inverse text mode.
jsr nameprnt output last filename.
keyloop lda kbd get keyboard input.
bpl keyloop loop until key pressed.
sta KBDSTROBE clear strobe.
jsr setnorm set normal text mode.
ldx filecount are any files displayed ?
beq L5ECB no, don't accept arrow keys or return.
cmp #$8D return ?
beq L5EF4 then run selected file.
cmp #$8A down ?
beq dnarrow move down a name.
cmp #$8B up ?
beq uparrow move up a name.
L5ECB cmp #$89 tab ?
beq L5EED new volume.
cmp #$9B esc ?
bne keyloop no, try again else pop up a directory.
* pop a directory level
jsr popdir
dec dlevel
bra L5EF1
popdir ldx pbuf
L5EDD dex
lda pbuf,x
cmp #$2F slash
bne L5EDD
cpx #$01
bne L5EEC
ldx pbuf
L5EEC rts
L5EED jmp SEL1.NextVol set up new unit number.
L5EF0 inx
L5EF1 jmp vnam1 get new directory info.
* run selected file
L5EF4 jsr MLI
.DA #MLISETPREFIX
.DA pf_parms
bcs L5EED error.
ldx valcnt get name number.
jsr namecalc set up name storage area (on return y=0)
ldx pbuf get prefix length.
L5F04 iny start at y = 1.
lda (fnstore),y get character of name.
inx
sta pbuf,x store in prefix buffer.
cpy namelen check length of name.
bcc L5F04 loop until all transferred.
stx pbuf put prefix length into buffer.
ldy valcnt get file number.
lda filetyps,y get file type.
bpl L5EF0 branch if directory.
jsr settxt reset to full window.
jsr home makes for no flash.
lda #$95 ctrl-u
jsr cout turn off 80 columns.
jsr MLI open file
.DA #MLIOPEN
.DA op_parms
bcs L5EED if error.
lda op_refn move reference number
sta rd_refn for read.
* lda #$FF read the entire file.
* sta rd_reqlen
* sta rd_reqlen+1
dec rd_reqlen+1 was $002B, now $FF2B
jsr SEL1.Read read selected file.
php save possible error.
jsr MLI close file. ignore any error from close
.DA #MLICLOSE
.DA cl_parms
plp restore status from read.
bcs L5EED if any errors.
jmp sysentry execute selected system file.
* output messages. on entry: acc = horizontal position,
* y = index to message teminated by 0.
sethorz sta ch
msgout lda dsp2msg,y
beq L5F57
jsr cout
iny
bne msgout
L5F57 rts
* name pointer calculator for name storage area
namecalc stz fnstore+1 init high byte of 16-bit shift
txa
asl shift to high nibble
rol fnstore+1
asl
rol fnstore+1
asl
rol fnstore+1
asl
rol fnstore+1
sta fnstore low pointer
lda /iobuf
clc
adc fnstore+1
sta fnstore+1
ldy #$00
lda (fnstore),y file name length
sta namelen
rts
* output a filename line
nameprnt lda #$02
sta ch80col horizontal position = 2.
ldx valcnt filename number
txa
sec
sbc topname calculate line # to display name
inc
inc
jsr TABV set vertical position.
lda filetyps,x get filetype (x is unchanged by tabv).
bmi L5F99 branch if system file.
stz ch80col adjust cursor position.
lda invflg ave current inverse setting
pha
ldy #fldrmsg-dsp2msg
jsr msgout display the folder.
pla restore inverse setting.
sta invflg
L5F99 jsr outsp output a space.
jsr namecalc calc name location.
L5F9F iny y = 1 (first time).
lda (fnstore),y get name character.
jsr output put on screen.
cpy namelen end of name ?
bcc L5F9F no.
outsp lda #$A0
.HS 2C BIT ABS
homecurs lda #$99
output ora #$80 set high bit.
jmp cout output to screen.
SEL1.ReadEntry jsr SEL1.Read
bcs SEL1.Read.RTS
ldy #sysentry
lda /sysentry
ldx #2
jmp GP.TOOLBOX
SEL1.Read jsr MLI mli read call
.DA #MLIREAD
.DA rd_parms
SEL1.Read.RTS rts
*--------------------------------------
* data area
*--------------------------------------
dsp2msg .AS -"RETURN: Select | TAB: Chg Vol | ESC: Back"
.HS 00
fldrmsg .HS 0F inverse control code
.HS 1B enable mousetext
.AS -"XY" folder characters
.HS 18 disable mousetext
.HS 0E normal control code
.HS 00
*--------------------------------------
op_parms .DA #3 3 parms
.DA pbuf pathname
.DA op_buf file buffer
op_refn .HS 00 reference number
cl_parms .HS 01 1 parm
.HS 00 reference number.
ol_parms .HS 02 2 parms
ol_unit .HS 60 unit number, default = s6, d1
.DA pbuf+1 data buffer
pf_parms .DA #01 one parm
.DA pbuf pathname
rd_parms .DA #04 4 parms
rd_refn .HS 01 reference number
.DA sysentry data buffer
*--------------------------------------
.LIST ON
SEL1.LEN .EQ *-SEL1.START
.LIST OFF
*--------------------------------------
* these last 2 parms (4 bytes) may extend past $300 length limit since
* the request count is set prior to using the parm block and the transfer
* count isn't used at all (except by prodos)
*--------------------------------------
.DUMMY
rd_reqlen .BS 2 requested length
.BS 2 actual length
.ED
*--------------------------------------
MAN
SAVE usr/src/prodos.fx/prodos.s.sel1
LOAD usr/src/prodos.fx/prodos.s
ASM
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