mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-03 12:06:05 +00:00
205 lines
4.9 KiB
Plaintext
205 lines
4.9 KiB
Plaintext
NEW
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AUTO 3,1
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*--------------------------------------
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ILDR.START jsr MLI check for file 'atinit'
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.DA #MLIGETFILEINFO
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.DA gfi_list
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bcc gfi_ok branch if 'atinit' file found
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cmp #MLI.E.FNOTFND
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beq ILDR.SYSTEM if so, continue loading interpreter
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ATINIT.KO ldx #ATINIT.ERR.LEN-1
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.1 lda ATINIT.ERR,x
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sta vline16,x
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dex
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bne .1
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beq *
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gfi_ok lda gfi_type
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cmp #$E2 is 'atinit' correct file type?
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bne ATINIT.KO error - wrong file type
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jsr MLI open 'atinit' file
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.DA #MLIOPEN
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.DA atopen
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bne ATINIT.KO error
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lda #$9F max size = 39.75k ($2000-$BF00)
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sta rdlen+1
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stz rdlen
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jsr MLI read 'atinit' file to 'sysentry'
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.DA #MLIREAD
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.DA rdparm
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bne ATINIT.KO error - too big
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jsr MLI close 'atinit' file
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.DA #MLICLOSE
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.DA clparm
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bne ATINIT.KO error
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lda RROMBNK2 enable ROM
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jsr sysentry execute ATinit
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*--------------------------------------
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ILDR.SYSTEM lda /dbuf search directory buffer
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sta idxl+1
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lda #$04 start 1 entry past header
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bne H2434 always.
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H2432 lda idxl calc next entry position
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H2434 clc
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adc dbuf+35 inc to next entry address
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sta idxl
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bcs H2451 branch if page cross.
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adc dbuf+35 test for end of block.
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bcc H2453 branch if not page cross
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lda idxl+1
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lsr end of block?
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bcc H2453 no.
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cmp #$09 end of directory?
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bne H244D no.
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jmp nointrp no interpreter, go quit.
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H244D lda #$04 reset index to 1st entry in next block.
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sta idxl
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H2451 inc idxl+1 inc to next page.
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H2453 ldy #$10 check file type.
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lda #$FF must be a prodos sys file
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eor (idxl),y
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bne H2432 if not sys.
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tay see if active
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lda (idxl),y
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beq H2432 if deleted file.
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and #$0F strip file 'kind'.
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sta pbuf save length of name.
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cmp #$08 must be at least 'x.system'
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bcc H2432 else, ignore it.
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tay compare last 7 chars for '.system'
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ldx #$06
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H246C lda (idxl),y
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eor iterp,x
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asl
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bne H2432 branch if something else
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dey
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dex
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bpl H246C
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ldy #$00
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H247A iny
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lda (idxl),y
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sta pbuf,y
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ora #$80 msb on so can be displayed if error
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sta iomess+$11,y
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cpy pbuf
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bne H247A
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lda #$A0 space after name
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sta iomess+$12,y
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tya error message length
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adc #$13 (carry set)
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sta ierlen
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jsr MLI open interpreter file
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.DA #$C8
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.DA opparm
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bne badlod
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jsr MLI get eof (length of file)
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.DA #$D1
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.DA efparm
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bne badlod
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lda eof+2
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bne toolong
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lda eof+1
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cmp #$9F max size = 39.75k ($2000-$BF00)
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bcs toolong
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sta rdlen+1
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lda eof
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sta rdlen (read entire file)
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jsr MLI read interpreter file
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.DA #$CA
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.DA rdparm
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beq H24C8 go close if successfully read.
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cmp #$56 memory conflict?
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beq toolong then too large
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bne badlod else, unable to load.
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H24C8 jsr MLI close interpreter file
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.DA #$CC
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.DA clparm
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bne badlod hopefully never taken
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lda RROMBNK2 enable ROM
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jmp sysentry go run interpreter
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nointrp jsr MLI no interpreter found,so quit.
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.DA #$65
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.DA quitparm
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badlod ldy ierlen center the error message
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lda #$27
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sec
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sbc ierlen
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lsr
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adc ierlen
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tax
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H24FA lda iomess,y
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sta vline16,x
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dex
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dey
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bpl H24FA
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bra *
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toolong ldy #lgmess.len
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H2508 lda lgmess,y
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sta vline16+5,y
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dey
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bpl H2508
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bra *
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*--------------------------------------
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ATINIT.ERR .AS -"Unable to load ATInit file"
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ATINIT.ERR.LEN .EQ *-ATINIT.ERR
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gfi_list .DA #$0A
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.DA atinitname
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.HS 00
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gfi_type .HS 00000000
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.HS 0000000000000000
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.HS 0000
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atopen .HS 03
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.DA atinitname
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.DA iobuf i/o buffer
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.HS 01 ref# hard coded since no other files
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atinitname .DA #06 length of name
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.AS -"atinit" name of appletalk config file
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*--------------------------------------
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lgmess .AS -"** System program too large **"
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lgmess.len .EQ *-lgmess
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iomess .AS -"** Unable to load"
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.AS -" X.System *********"
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ierlen .HS 00
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opparm .HS 03
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.DA pbuf
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.DA iobuf
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.HS 01
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efparm .HS 02
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.DA #01
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eof .HS 000000 length of file.
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rdparm .HS 04
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.HS 01
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.DA sysentry
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rdlen .HS 0000
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.HS 0000
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clparm .HS 01
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.HS 00
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quitparm .HS 04
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.HS 00
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.HS 0000
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.HS 00
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.HS 0000
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iterp .AS -".SYSTEM" interpreter suffix that is required
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*--------------------------------------
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ILDR.LEN .EQ *-ILDR.START
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MAN
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SAVE USR/SRC/PRODOS.FX/PRODOS.S.ILDR
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LOAD USR/SRC/PRODOS.FX/PRODOS.S
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ASM
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