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A2osX/ProDOS.203/ProDOS.S.LDR.A.txt
Rémy GIBERT 45d20f5171 Kernel 0.93+
2019-10-19 20:35:30 +02:00

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NEW
AUTO 3,1
*--------------------------------------
H2000 jmp prostart
jmp atalkset appletalk setup for network boot
jmp p16start GQuit setup for gs/os
LDR.MSG.AppleII .AS -"Apple II"
LDR.MSG.ProDOS .AS -"ProDOS 8 V2.0.3tc "
.AS -"06-May-93"
H202F .AS -" "
LDR.MSG.Copyright
.AS -"Copyright Apple Computer, Inc., 1983-93"
LDR.MSG.Reserved
.AS -"All Rights Reserved."
p16start inc setuprts set = 2 for GQuit rts
atalkset inc setuprts set = 1 for appletalk rts
prostart lda unitnum
sta LDR.MLIONLINE.P+1
jsr LDR.Splash
* test for at least a 65c02
sed
lda #$99 a negative #
clc
adc #$01 +1 in decimal = 0 (positive)
cld
bmi m48k if 6502 because will not clear N flag
* machine at least an m65c02
lda #$01 patch for the gs rom
trb statereg to force off intcxrom
ldx #H232B yx=232B location table
ldy /H232B
jsr reloc move interpreter loader to $800
bcs m48k error
* test for at least 64k
ldy #$00
lda #$FF
sta kversion at least 48k ?
eor kversion
sec
bne m48k if not.
sta kversion try again to be sure
lda kversion
bne m48k still not.
lda RROMBNK2 read ROM
jsr whchrom get preliminary system config
bcs m48k machine too small
lda idapple
and #$20
bne m64k if at least 64k //+.
m48k jmp H22EB need enhanced IIe
* we have 64k, now determine model: //e , iic, or Cortland (//gs)
m64k ldx #H2367 yx=2367 relocation table
ldy /H2367
jsr reloc
lda kversion
sta xdosver save current version for dir use
H20CE bcc H20D3
jmp relocerr
H20D3 lda RROMBNK2 read ROM
ldx version ROM id byte
cpx #$06
bne H211D then it's a //e
lda #$E0
bit zidbyte another ROM id byte
php
lda idapple
and #$37
plp
bvc set3 if //c or //x
bmi set7 if //e
set3 php
ora #$08
plp
bpl mach2 if //c
ora #$40
bpl H20FD always taken.
mach2 inc cflag //c or later
bvs H20FD
set7 ora #$80
H20FD sta idapple
lda RROMBNK2 read ROM
sec
jsr idroutine returns system info
bcs H211D branch if // family
inc cortland it's a Cortland, set loader flag
stz vmode force setvid to reset cursor
jsr setvid reset output to screen
lda setuprts
bne H211D branch if prodos 8 alone
* running from gs/os shell so zero out os_boot for appletalk
sta OS_BOOT indicates O/S initially booted.
jsr patch101 patch for gs/os - rev note #101
* put dispatcher in bank 2 of language card
H211D lda LDR.MLIONLINE.P+1 place boot devnum in globals
sta LDR.MLIREADBLOCK.P+1
sta devnum last device used
jsr devsrch finish setting up globals
lda LDR.MLIREADBLOCK.P+1
sta devnum
jsr lc1in switch in language card bank 1.
ldx #rlclk64 set up clock
ldy /rlclk64
jsr reloc
H2139 bcs H20CE
lda #calldisp
sta jspare+1 P8 system death vector
lda /calldisp
sta jspare+2
lda RRAMWRAMBNK2 read/write RAM bank 2
lda RRAMWRAMBNK2
ldx #altdsptbl GQuit dispatcher
ldy /altdsptbl
lda setuprts
cmp #$02 is this a GQuit setup?
beq H216E taken to use GQuit dispatcher.
ldx #newquitbl else, use Bird's Better Bye
ldy /newquitbl if correct machine.
lda machid machine ID byte
bit #$00 //c ?
bne H216E if yes, can use.
and #$C2
cmp #$82 //e with 80 col card ?
beq H216E if yes, can use.
ldx #dsp64 else, use original quit code
ldy /dsp64
inc newquitflag using old quit code so set flag
H216E jsr reloc
lda #$EE byte to distinguish LC bank 2
sta $D000
jsr lc1in switch in LC bank 1
bcs H2139
* test for 128k needed to install ram disk
lda machid machine ID byte
and #$30
eor #$30
bne noramdsk if < 128k
ldx #$FF
php save interrupt status
pla in acc.
sei no interrupts.
sta SETALTZP use alt zero page/stack
stx auxsp init aux sp to $FF
sta CLRALTZP use main zero page/stack
pha restore interrupt status
plp
sta CLRC3ROM enable internal slot 3 ROM
jsr RAMDRV.Install
* check interrupt vector to determine ROM version
noramdsk lda RROMWRAMBNK2 read ROM/write RAM bank 2
ldy irqv interrupt vector
ldx irqv+1 x = high byte
jsr lc1in set language card bank 1 to r/w
cpx #$D0 is it > $D000 (old roms)
lda #$00
bcs H21C5 branch if old roms
sta SETALTZP use alt zero page/stack
lda #$FF set aux sp = $FF
sta auxsp
stx irqv+1 interrupt vector
sty irqv save irq vector in aux lc
sta CLRALTZP use main zero page/stack
stx irqv+1 save irq vector in main lc
sty irqv
lda #$01
H21C5 sta irqflag 1 = new roms
stz cortflag assume not Cortland system
lda cortland running on a Cortland ?
beq H21D5 branch if not.
inc cortflag yes it's Cortland
bra docard
* check for a rom in slot 3. if no rom, use internal $C300 firmware
H21D5 sta CLRC3ROM enable internal slot 3 ROM
lda rommap slot ROM bit map
and #$08 mask all but slot 3
bne isromin3 taken if rom in slot 3
bra H2247 else continue booting
* found a rom in slot 3. is it an external, identifiable 80 col card
* with interrupt routines? if so, enable it else use internal $C300 firmware.
isromin3 sta SETC3ROM enable slot 3 rom
lda $C305 check card id bytes
cmp #$38
bne hitswtch not terminal card
lda $C307
cmp #$18
bne hitswtch
lda $C30B
cmp #$01
bne hitswtch
lda $C30C is it an apple 80 col compatible card?
and #$F0
cmp #$80
bne hitswtch if not.
lda machid machine ID byte
and #$C8
cmp #$C0 is it a //+ ?
beq docard yes
lda $C3FA
cmp #$2C does card have an interrupt handler?
beq docard yes
hitswtch sta CLRC3ROM enable internal $C300 firmware
* verify that the card in aux slot is actually present
sta SET80STORE enable 80-col store
sta SETPAGE2 switch in text page 2
lda #$EE
sta txtp2
asl
asl txtp2
cmp txtp2
bne H2230
lsr
lsr txtp2
cmp txtp2
H2230 sta CLRPAGE2 main memory
sta CLR80STORE disable 80-col store
beq docard branch if card is there
lda machid machine ID byte
and #$FD clear 80-col bit 2 (no card)
bne H2244 always
docard lda machid
ora #$02 turn bit 2 on (80-col card is present)
H2244 sta machid
H2247 lda cortland are we running on a //gs ?
beq H225D if not.
lda #$4C enable clock routine by putting a jmp
sta clockv in front of clock vector
ldx #cortclock yx = relocation table
ldy /cortclock for cortland clock driver
jsr reloc
lda #$01 set bit 0 = clock present
tsb machid
H225D lda setuprts get setup entry point flag
beq H2267 taken if normal boot.
lda RROMBNK2 read ROM
rts return to caller at setup entry point.
setuprts .DA #$00 0 = normal boot, <>0 = return
* set prefix to boot device
H2267 jsr MLI
.DA #MLIONLINE
.DA LDR.MLIONLINE.P
bcs relocerr
lda pbuf+1 get volume name length.
and #$0F strip devnum
beq relocerr
inc add 1 for leading '/'
sta pbuf save prefix length.
lda #'/' place leading '/' in prefix buffer
sta pbuf+1
jsr MLI
.DA #MLISETPREFIX
.DA LDR.MLISETPREFIX.P
bcs relocerr
tax =0
stx dst
ldy #$02 read directory into buffer
lda /DirBlkBuf
H228E sta dst+1
sta LDR.MLIREADBLOCK.P+3
sty LDR.MLIREADBLOCK.P+4
stx LDR.MLIREADBLOCK.P+5
jsr MLI
.DA #MLIREADBLOCK
.DA LDR.MLIREADBLOCK.P
bcs relocerr
ldy #$03 get next block# from link
lda (dst),y
tax
dey
ora (dst),y if both bytes are the same
beq H22B7 then no more blocks of directory.
lda (dst),y
tay
lda dst+1
clc
adc #$02 add $200 to buffer pointer
cmp /dbuf+$800 until it points past end of buffer.
bcc H228E if ok, read next block.
H22B7 jmp $800 jmp to "load interpreter" code
* relocation/configuration error
relocerr sta RROMBNK2 read ROM
jsr home
ldy #$1D
.1 lda LDR.MSG.LdrErr,y
sta vline12+4,y
dey
bpl .1
bmi *
LDR.MSG.LdrErr .AS -"Relocation/Configuration Error"
H22EB ldy #$23
.1 lda LDR.MSG.EnhErr,y
sta vline14+2,y
dey
bpl .1
bmi *
LDR.MSG.EnhErr .AS -"REQUIRES ENHANCED APPLE IIE OR LATER"
LDR.MLIONLINE.P .DA #2
.DA #$60
.DA pbuf+1
LDR.MLISETPREFIX.P
.DA #1
.DA pbuf
LDR.MLIREADBLOCK.P
.DA #3
.DA #0 unit number
.DA 0 2 byte data buffer
.DA 0 2 byte block number
cortland .BS 1 cortland loader flag (1 = Cortland)
newquitflag .BS 1 1 = old quit code
H232B .DA #1 move interpreter loader code
.DA $800 destination address
.DA licode.end-licode length to move
.DA LOADINT source address
.DA #$01 move $3F0 vectors
.DA p3vect destination
.DA $0010 16 bytes to move
.DA H257B source
.DA #$01
.DA lookptr destination address
.DA $0002 length to move
.DA dst source
.DA #$01 move 128k test to zero page
.DA tst128 destination
.DA LDR.Test128.Len length to move
.DA LDR.Test128 source
.HS FF done
dsp64 .DA #$01 move p8 dispatcher code
.DA displc2 destination
.DA $0300 length (must be <= 3 pages)
.DA SEL0 source
.HS FF done
newquitbl .DA #$01 move Bird's Bye code
.DA displc2 dest
.DA $0300 length (must be <= 3 pages)
.DA SEL1 source
.HS FF done
altdsptbl .DA #$01 move GQuit launcher
.DA displc2 destination
.DA $0300 length (must be <= 3 pages)
.DA SEL2 source
.DA #$01 move a copy of GQuit launcher
.DA dispadr to dispadr for gsos
.DA $0300 length (must be <= 3 pages)
.DA SEL2 source
.HS FF done
* tables for moving 64k version of mli for execution
H2367 .DA #$01 relocation table. 1=move src to dst
.DA $ff9b destination
.DA $100-$9B length to move
.DA IRQ source
.DA #$01
.DA MLI dst
.DA $0100 in one page
.DA GP src
.HS 00 0=clear buffers $D700-$DDFF
.DA $D700 start
.DA $0700 len
.DA #$01
.DA $DE00 dst
.DA $2100 length of mli
.DA XDOS src
.DA #$01
.DA $D000
.DA $0700 length of disk ii driver
.DA XRW
.HS FF done
* move thunderclock
rlclk64 .DA #$01 relocation table. 1=move src to dst
.DA $D742 destination
.DA TCLK.END-TCLK.START length of thunderclock driver
.DA TCLK source
.DA #$04 4=relocate and move program
.DA TCLK.START
.DA TCLK.CEND-TCLK.START
.DA TCLK.START
.HS 00
.HS C1C1
clock64 .DA #$00
.HS FF done
* move cortland clock
cortclock .DA #$01 relocation table. 1=move src to dst
.DA $D742 destination
.DA CCLK.END-CCLK.START length of cortland clock driver
.DA CCLK source
.HS FF done
* load and run appletalk configuration file (atinit) if present
* or continue loading and running .system file
* loader origin $800
LOADINT .PH $800
licode jsr MLI check for file 'atinit'
.DA #MLIGETFILEINFO
.DA gfi_list
bcc gfi_ok branch if 'atinit' file found
cmp #$46 file not found?
beq H23DF if so, continue loading interpreter
bne H23E2
gfi_ok lda gfi_type
cmp #$E2 is 'atinit' correct file type?
bne H23E2 error - wrong file type
jsr MLI open 'atinit' file
.DA #$C8
.DA atopen
bne H23E2 error
lda #$9F max size = 39.75k ($2000-$BF00)
sta rdlen+1
stz rdlen
jsr MLI read 'atinit' file to 'sysentry'
.DA #$CA
.DA rdparm
bne H23E2 error - too big
jsr MLI close 'atinit' file
.DA #$CC
.DA clparm
bne H23E2 error
lda RROMBNK2 enable ROM
jsr sysentry execute ATinit
H23DF jmp goloadint execute .system file
* fatal error
H23E2 ldx $23F0 BUG: should be ATINIT.ERR
H23E5 lda $23F0,x BUG: should be ATINIT.ERR
sta vline16,x
dex
bne H23E5
beq *
ATINIT.ERR .DA #$1A length of message
.AS -"Unable to load ATInit file"
gfi_list .DA #$0A
.DA atinitname
.HS 00
gfi_type .HS 00000000
.HS 0000000000000000
.HS 0000
atopen .HS 03
.DA atinitname
.DA iobuf i/o buffer
.HS 01 ref# hard coded since no other files
atinitname .DA #06 length of name
.AS -"atinit" name of appletalk config file
goloadint
lda /dbuf search directory buffer
sta idxl+1
lda #$04 start 1 entry past header
bne H2434 always.
H2432 lda idxl calc next entry position
H2434 clc
adc dbuf+35 inc to next entry address
sta idxl
bcs H2451 branch if page cross.
adc dbuf+35 test for end of block.
bcc H2453 branch if not page cross
lda idxl+1
lsr end of block?
bcc H2453 no.
cmp #$09 end of directory?
bne H244D no.
jmp nointrp no interpreter, go quit.
H244D lda #$04 reset index to 1st entry in next block.
sta idxl
H2451 inc idxl+1 inc to next page.
H2453 ldy #$10 check file type.
lda #$FF must be a prodos sys file
eor (idxl),y
bne H2432 if not sys.
tay see if active
lda (idxl),y
beq H2432 if deleted file.
and #$0F strip file 'kind'.
sta pbuf save length of name.
cmp #$08 must be at least 'x.system'
bcc H2432 else, ignore it.
tay compare last 7 chars for '.system'
ldx #$06
H246C lda (idxl),y
eor iterp,x
asl
bne H2432 branch if something else
dey
dex
bpl H246C
ldy #$00
H247A iny
lda (idxl),y
sta pbuf,y
ora #$80 msb on so can be displayed if error
sta iomess+$11,y
cpy pbuf
bne H247A
lda #$A0 space after name
sta iomess+$12,y
tya error message length
adc #$13 (carry set)
sta ierlen
jsr MLI open interpreter file
.DA #$C8
.DA opparm
bne badlod
jsr MLI get eof (length of file)
.DA #$D1
.DA efparm
bne badlod
lda eof+2
bne toolong
lda eof+1
cmp #$9F max size = 39.75k ($2000-$BF00)
bcs toolong
sta rdlen+1
lda eof
sta rdlen (read entire file)
jsr MLI read interpreter file
.DA #$CA
.DA rdparm
beq H24C8 go close if successfully read.
cmp #$56 memory conflict?
beq toolong then too large
bne badlod else, unable to load.
H24C8 jsr MLI close interpreter file
.DA #$CC
.DA clparm
bne badlod hopefully never taken
* if booting on a //c then see if esc is in keyboard buffer
* and clear it. it may have been pressed to shift speed
* of accelerator chip
lda cflag
beq H24DF taken if not booting on a //c
lda kbd else, check for keypress
cmp #$9B escape?
bne H24DF if not.
sta KBDSTROBE clear keyboard
H24DF lda RROMBNK2 enable ROM
jmp sysentry go run interpreter
cflag .HS 00 set if a //c.
nointrp jsr MLI no interpreter found,so quit.
.DA #$65
.DA quitparm
badlod ldy ierlen center the error message
lda #$27
sec
sbc ierlen
lsr
adc ierlen
tax
H24FA lda iomess,y
sta vline16,x
dex
dey
bpl H24FA
bmi H2511
toolong ldy #$1E
H2508 lda lgmess,y
sta vline16+5,y
dey
bpl H2508
H2511 bmi H2511
lgmess .AS -"** System program too large **"
iomess .AS -"** Unable to load"
.AS -" X.System *********"
ierlen .HS 00
opparm .HS 03
.DA pbuf
.DA iobuf
.HS 01
efparm .HS 02
.DA #01
eof .HS 000000 length of file.
rdparm .HS 04
.HS 01
.DA sysentry
rdlen .HS 0000
.HS 0000
clparm .HS 01
.HS 00
quitparm .HS 04
.HS 00
.HS 0000
.HS 00
.HS 0000
iterp .AS -".SYSTEM" interpreter suffix that is required
licode.end .EP
* 16 bytes moved to $03F0 vectors
H257B .DA breakv
.DA oldrst
.DA #$5A powerup byte
jmp oldrst '&' vector
jmp oldrst ctrl-y vector
.HS 004000
.DA irqent global page interrupt vector
lc1in lda RRAMWRAMBNK1 read/write language card RAM bank 1
lda RRAMWRAMBNK1
rts
* determine which system model and save in machine id (idapple)
whchrom stz idapple assume standard apple //
ldx version check hardware id
cpx #$38 is it apple // (autostart rom)?
beq H25BE if yes
lda #$80
cpx #$06 apple //e?
beq H25BC if yes
lda #$40
cpx #$EA apple //+?
bne H25B6 it not, then machine is unknown.
ldx $FB1E apple /// in emulation?
cpx #$AD
beq H25BC taken if apple //+.
lda #$D0 test again for apple /// emulation
cpx #$8A because will only have 48k memory.
bne H25B6 if taken, then machine is unknown.
H25B4 sec apple /// emulation is not allowed
rts because insufficient memory.
H25B6 lda #$02 machine unknown
sta (dst),y
bne H25D9 always.
H25BC sta idapple save machine id
* check for language card ram
H25BE jsr lc1in switch in language card bank 1
lda #$AA
sta $D000
eor $D000 if LC present, result = 0.
bne H25B4 othewise, insufficient memory.
lsr $D000 check lc again
lda #$55
eor $D000
bne H25B4 not sufficent memory.
lda #$20 LC ram is available
ora idapple
H25D9 jmp tst128 jumps to page 0 routine below
* test for 128k. use page 0 for this routine
LDR.Test128 sta idapple H25DC-2621 was moved to location tst128
bpl not128 if already determined < 128k
lda #$EE
sta SETWRITEAUX write to aux mem while on main zp
sta SETREADAUX and read aux mem.
sta dbuf write these locs just to test aux mem
sta $800 1k apart from each other.
lda dbuf
cmp #$EE
bne noaux
asl dbuf may be sparse mem mapping so
asl change value and see what happens.
cmp dbuf
bne noaux branch if not sparse mapping.
cmp $800
bne H2606 if not sparse.
noaux sec no aux memory available.
bcs H2607
H2606 clc
H2607 sta CLRWRITEAUX switch back to main memory
sta CLRREADAUX
bcs not128 if < 128k
lda idapple
ora #$30 set id = 128k present
sta idapple
not128 lda lookptr+1
sec
sbc #$05
sta lookptr+1
bcs H2620
dec lookptr
H2620 clc
rts
LDR.Test128.len .EQ *-LDR.Test128
*--------------------------------------
MAN
SAVE USR/SRC/PRODOS.203/PRODOS.S.LDR.A
LOAD USR/SRC/PRODOS.203/PRODOS.S
ASM
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