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bdcf96401e
A2osX/ProDOS.203/ProDOS.S.LDR.txt
Rémy GIBERT bdcf96401e Kernel 0.93+
2019-09-10 22:53:18 +02:00

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NEW
AUTO 3,1
.OP 65C02
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 V2.0.3 "
.AS "06-May-93"
H202F .AS " "
H203B .AS "Copyright Apple Computer, Inc., 1983-93"
H2062 .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 romin 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 romin 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 romin 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 altram read/write RAM bank 2
lda altram
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 $FF
sta setstdzp use main zero page/stack
pha restore interrupt status
plp
sta int3rom enable internal slot 3 ROM
jsr H2C80 install ram disk
* check interrupt vector to determine ROM version
noramdsk lda romin1 read ROM/write RAM bank 2
ldy irqv interrupt vector
ldx irqv+1 x = high byte
jsr lc1in set language card bank 1 to r/w
cpx #$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 setstdzp 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 int3rom 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 slot3rom enable slot 3 rom
lda slot3id1 check card id bytes
cmp #$38
bne hitswtch not terminal card
lda slot3id2
cmp #$18
bne hitswtch
lda slot3id3
cmp #$01
bne hitswtch
lda ext80col is it an apple 80 col compatible card?
and #$F0
cmp #$80
bne hitswtch if not.
lda machid machine ID byte
and #$C8
cmp #$C0 is it a //+ ?
beq docard yes
lda slot3irq
cmp #$2C does card have an interrupt handler?
beq docard yes
hitswtch sta int3rom enable internal $C300 firmware
* verify that the card in aux slot is actually present
sta store80on enable 80-col store
sta txtpage2 switch in text page 2
lda #$EE
sta txtp2
asl
asl txtp2
cmp txtp2
bne H2230
lsr a
lsr txtp2
cmp txtp2
H2230 sta txtpage1 main memory
sta store80off 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 romin 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 online
.DA #MLIONLINE
.DA LDR.MLIONLINE.P
bcs relocerr
lda PrefixBuf+1 get volume name length.
and #$0F strip devnum
beq relocerr
inc add 1 for leading '/'
sta PrefixBuf save prefix length.
lda #'/' place leading '/' in prefix buffer
sta PrefixBuf+1
jsr MLI set prefix
.DA #MLISETPREFIX
.DA LDR.MLISETPREFIX.P
bcs relocerr
tax =0
stx ZP.DstPtr
ldy #$02 read directory into buffer
lda /DirBlkBuf
H228E sta ZP.DstPtr+1
sta LDR.MLIREADBLOCK.P+4
sty LDR.MLIREADBLOCK.P+5
stx LDR.MLIREADBLOCK.P+6
jsr MLI read block
.DA MLIREADBLOCK
.DA LDR.MLIREADBLOCK.P
bcs relocerr
ldy #$03 get next block# from link
lda (ZP.DstPtr),y
tax
dey
ora (ZP.DstPtr),y if both bytes are the same
beq H22B7 then no more blocks of directory.
lda (ZP.DstPtr),y
tay
lda ZP.DstPtr+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 lodintrp jmp to 'licode' (load interpreter)
* relocation/configuration error
relocerr sta romin 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"
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 PrefixBuf+1
LDR.MLISETPREFIX.P
.DA #1
.DA PrefixBuf
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 lodintrp destination address
.DA H257B-licode' length to move
.DA licode' source address
.DA #$01' move $3F0 vectors
.DA p3vect' destination
.DA $0010' 16 bytes to move
.DA H257B' source
.DA #$01'
.DA lookptr'
.DA $0002'
.DA ZP.DstPtr'
.DA #$01' move 128k test to zero page
.DA tst128' destination
.DA H2622-H25DC' length
.DA H25DC' source
.DA #FF' done
dsp64 .DA #$01' move p8 dispatcher code
.DA displc2' destination
.DA birdbye-disp1obj' length (must be <= 3 pages)
.DA disp1obj' source
.DA #FF' done
newquitbl dc i1'$01' move Bird's Bye code
.DA displc2' dest
.DA GQdisp-birdbye' length (must be <= 3 pages)
.DA birdbye' source
.DA #FF' done
altdsptbl .DA #$01' move GQuit launcher
.DA displc2 destination
.DA $0300' length (must be <= 3 pages)
.DA GQdisp' source
.DA #$01' move a copy of GQuit launcher
.DA dispadr' to dispadr for gsos
.DA $0300' length (must be <= 3 pages)
.DA GQdisp' source
.DA #FF' done
* tables for moving 64k version of mli for execution
H2367 .DA #$01' relocation table. 1=move src to ZP.DstPtr
.DA lanirq' destination
.DA H2E00-H2D9B' length to move
.DA H2D9B' source
.DA #$01'
.DA MLI' globals
.DA $0100' in one page
.DA H2E00'
.HS 00 0=clear buffers $D700-$DDFF
.DA pathbuf
.DA xdosorg-pathbuf'
.DA #$01'
.DA xdosorg'
.DA ramsrc-xdosobj' length of mli
.DA xdosobj'
.DA #$01'
.DA rwts'
.DA disp1obj-blockio' length of disk ii driver
.DA blockio'
.DA #FF' done
* move thunderclock
rlclk64 .DA #$01' relocation table. 1=move src to ZP.DstPtr
.DA tclk_in' destination
.DA tclk_end-tclock_0' length of thunderclock driver
.DA tclock_0' source
.DA #$04' 4=relocate and move program
.DA tclk_in'
.DA H2F69-tclock_0'
.DA tclk_in'
.HS 00
dc h'C1C1'
clock64 .DA #$00'
.DA #FF' done
* move cortland clock
cortclock dc i1'$01' relocation table. 1=move src to ZP.DstPtr
.DA tclk_in' destination
.DA cclk_end-cclock_0' length of cortland clock driver
.DA cclock_0' source
.DA #FF' done
* load and run appletalk configuration file (atinit) if present
* or continue loading and running .system file
* loader origin $800
ofsL .EQ licode-lodintrp offset from loader org
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' parms
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 romin enable ROM
jsr sysentry execute ATinit
H23DF jmp goloadint execute .system file
* fatal error
H23E2 ldx H23F0
H23E5 lda H23F0,x
sta vline16,x
dex
bne H23E5
beq *
H23F0 .DA #$1A length of message
.AS "Unable to load ATInit file"
gfi_list .EQ *-ofsL
.DA #0A'
.DA atinitname'
.HS 00
gfi_type .EQ *-ofsL
dc h'00000000'
.DA #0000000000000000'
.HS 0000
atopen .EQ *-ofsL parms to open 'atinit'
dc h'03'
.DA atinitname'
.DA iobuf' i/o buffer
dc h'01' ref# hard coded since no other files
atinitname .EQ *-ofsL
.DA #06' length of name
dc c'atinit' name of appletalk config file
goloadint .EQ *-ofsL
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 a 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 PrefixBuf 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 PrefixBuf,y
ora #$80 msb on so can be displayed if error
sta iomess+$11,y
cpy PrefixBuf
bne H247A
lda #$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 romin enable ROM
jmp sysentry go run interpreter
cflag .EQ *-ofsL
.HS 00 set if a //c.
nointrp .EQ *-ofsL no interpreter found,
jsr MLI so quit.
.DA #$65'
.DA quitparm'
badlod ldy ierlen center the error message
lda #$27
sec
sbc ierlen
lsr a
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 .EQ *-ofsL
dc c'** System program too large **'
iomess .EQ *-ofsL
dc c'** Unable to load'
dc c' X.System *********'
ierlen .EQ *-ofsL
.HS 00
opparm .EQ *-ofsL parms for open call
dc h'03'
.DA PrefixBuf'
.DA iobuf'
dc h'01'
efparm .EQ *-ofsL parms for get eof call
dc h'02'
.DA #01'
eof .EQ *-ofsL
dc h'000000' length of file.
rdparm .EQ *-ofsL parms for read call
dc h'04'
dc h'01'
.DA sysentry'
rdlen .EQ *-ofsL
.HS 0000
.HS 0000
clparm .EQ *-ofsL parms for close call
dc h'01'
.HS 00
quitparm .EQ *-ofsL parms for quit call
dc h'04'
.HS 00
.HS 0000
.HS 00
.HS 0000
iterp .EQ *-ofsL interpreter suffix that is required
dc c'.SYSTEM'
* 16 bytes moved to $03F0 vectors
H257B dc i2'breakv'
.DA oldrst'
.DA #5A' powerup byte
jmp oldrst '&' vector
jmp oldrst ctrl-y vector
.DA #004000'
.DA irqent' global page interrupt vector
lc1in lda ramin read/write language card RAM bank 1
lda ramin
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 HFB1E 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 #$02 machine unknown
sta (ZP.DstPtr),y
bne H25D9 always.
H25BC sta idapple save machine id
* check for language card ram
H25BE jsr lc1in switch in language card bank 1
lda #$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 #$20 LC ram is available
ora idapple
H25D9 jmp tst128 jumps to page 0 routine below
* test for 128k. use page 0 for this routine
H25DC sta idapple H25DC-2621 was moved to location tst128
bpl not128 if already determined < 128k
lda #$EE
sta wrcardram write to aux mem while on main zp
sta rdcardram and read aux mem.
sta dbuf write these locs just to test aux mem
sta lodintrp 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 lodintrp
bne H2606 if not sparse.
noaux sec no aux memory available.
bcs H2607
H2606 clc
H2607 sta wrmainram switch back to main memory
sta rdmainram
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
* prodos greeting splash screen
LDR.Splash lda spkr click speaker
sta clr80vid disable 80 col hardware
sta store80off disable 80 col store
jsr setnorm set normal text mode
jsr init init text screen
jsr setvid reset output to screen
jsr setkbd reset input to keyboard
cld
jsr home
ldx #$07
.1 lda H2009,x print title
sta vline10+16,x
dex
bpl .1
ldx #$1D
.2 lda H2011,x
sta vline12+5,x
dex
bpl .2
ldx #$0B
.3 lda H202F,x
sta vline14+14,x
dex
bpl .3
ldx #$26
.4 lda H203B,x
sta vline23,x
dex
bpl .4
ldx #$13
.5 lda H2062,x
sta vline24+10,x
dex
bpl .5
sec
jsr idroutine returns system info
bcs .8 taken if not a //gs
lda #$80
trb newvideo video mode select
.8 lda spkr click speaker
rts
* find all disk devices in system slots and set up address
* and device table in prodos global page. if there is a disk
* card in slot 2 then limit the # of devices in slot 5
* smartport to only 2
numdev2 .HS 0000000000000000 8 bytes for smartport call
driveradr .DA 0
d2idx .DA #0
diskins2 .DA #0 msb clear if drive in slot 2
devsrch stz ZP.DstPtr
stz ZP.DstPtr+1
stz idxl
ldx #$FF init to no active devices.
stx numdevs count (-1) active devices.
lda #$0E start disk // area at end of devlist.
sta d2idx
* check slot 2. if there is a disk card then clear the msb of diskins2. this
* will limit the # of devices in any slot 5 spartport card to 2.
lda #$C2
sta idxl+1 check slot 2
jsr cmpid is there a disk in slot 2 ?
ror diskins2 if so, clear msb else set it.
lda #$C7 search slots from high to low
sta idxl+1
H26AB jsr cmpid
bcs H270C if no ProDOS device in this slot.
lda (idxl),y check last byte of $Cn rom (y = $ff)
beq diskii branch if 16 sector disk II.
cmp #$FF if = $FF then 13 sector disk II.
bcs H270C ignore if 13 sector boot ROM
sta driveradr else assume it's an intelligent disk.
ldy #$07 check for a smartport device.
lda (idxl),y
bne H26C4 no smartport
jmp smartprt
H26C4 ldy #$FE
lda (idxl),y get attributes.
and #$03 verify it provides read and status calls.
cmp #$03
sec assume it's an off-brand disk
bne H270C
jsr setdevid set up the devid byte from attributes
clc
php remember that it's not a disk //.
lsr a move # of units (0=1, 1=2) to carry.
lda idxl+1 store hi entry addr (low already done)
bne H26E6 branch always.
diskii sta devid =0 since disk ii's have null attributes
sec
php remember it's a disk //
lda H2802
sta driveradr
lda H2802+1
H26E6 sta driveradr+1
jsr installdev install 1 or 2 devices from this slot.
plp get back if it's a disk // (carry).
bcc nxtdsk2 if not disk //.
dex move the list pointer back by 2 devices
dex
stx numdevs count (-1) active devices
dec d2idx increase the disk two index
dec d2idx
ldy d2idx
inx adj since device count starts with $FF.
lda devlist+1,x get entries for disk //
sta devlist,y move then toward the end of the list
lda devlist,x
sta devlist+1,y
dex back to numdevs again
nxtdsk2 clc
H270C jsr sltrom test for ROM in given slot and set flags
dec idxl+1 next lower slot.
lda idxl+1
and #$07 have all slots been checked ?
bne H26AB no.
* perform the new device search, mapping unmounted smartport devices
* to empty slots in the device table.
jsr newmount
* now copy the disk // list to the end of the regular list.
* start by making the device count include disk //'s
ldx numdevs current device count - 1
lda #$0E
sec
sbc d2idx
beq H2747 if there were no disk //'s then done.
clc
adc numdevs sum of disk //'s and others.
sta numdevs
inx move to open space in regular list.
ldy #$0D first disk // entry.
H272F lda devlist,y
pha
lda devlist,x
sta devlist,y
pla
sta devlist,x
inx
dey
sty d2idx use as a temp
cpx d2idx
bcc H272F continue until indexes cross
H2747 ldy #$00
ldx numdevs now change the device order so that
H274C lda devlist,x the boot device will have highest
pha priority.
and #$7F strip off high bit
eor devnum for comparison.
asl
bne H275A
pla
iny
H275A dex
bpl H274C
ldx numdevs now reverse order of search, hi to lo.
tya was boot device found ?
beq H2777
lda devnum make boot device 1st in search order.
sta devlist,x
dex
bmi H277E branch if only one device.
dey is this a 2 drive device ?
beq H2777 branch if not.
eor #$80 make boot device, drive 2 next.
sta devlist,x
dex
bmi H277E branch if only 1 device, 2 drives.
H2777 pla
sta devlist,x
dex
bpl H2777
H277E jsr fndtrd save accumulated machine id.
beq H2787
sta machid machine ID byte
rts
H2787 jmp H25B6
stadrv ora devid combine with attributes.
ldx numdevs
inx put device # into device list.
sta devlist,x
asl now form drive 2 device number, if any.
rts
sltrom bcc H27F3 branch if disk drive
* test for clock card
ldy #$06
H2799 lda (idxl),y
cmp dskid,y
bne H27BA no clock
dey
dey
bpl H2799
lda idxl+1 transfer hi slot address
sbc #$C1 minus $C1 (default) to relocate
sta clock64 references to clock rom.
lda #$4C enable jump vector in globals.
sta clockv P8 clock vector.
lda idapple mark clock as present.
beq H277E
ora #$01
sta idapple xxxxxxx1 = clock present.
bne H27F3 always taken.
* test for 80 col card
H27BA ldy #$05
lda (idxl),y
cmp #$38
bne H27E4
ldy #$07
lda (idxl),y
cmp #$18
bne H27E4
ldy #$0B
lda (idxl),y
dec a must = 1
bne H27E4
iny
lda (idxl),y
and #$F0 mask off low nibble.
cmp #$80 generic for 80-col card.
bne H27E4
lda idapple
beq H277E
ora #$02
sta idapple xxxxxx1x = 80 col card.
bne H27F3 always taken.
* test for any other rom
H27E4 ldx #$00
lda (idxl)
cmp #$FF apple /// non-slot?
beq H2801 invalid rom
H27EC cmp (idxl) look for floating bus
bne H2801 no rom
inx
bne H27EC
H27F3 lda idxl+1 mark a bit in slot byte
and #$07 to indicate rom present.
tax
lda sltbit,x
ora rommap mark bit to flag rom present
sta rommap slot ROM bit map
H2801 rts
H2802 .DA rwts disk ii driver
* id bytes: evens for clock, odds for disk
dskid .HS 082028005803703C
* slot bits
sltbit .HS 0002040810204080
fndtrd clc
ldy sltbit
H2818 lda (lookptr),y
and #$DF
adc sltbit
sta sltbit
rol sltbit
iny
cpy sltbit+3
bne H2818
tya
asl
asl
asl
asl
tay
eor sltbit
adc #$0B
bne H283B
lda idapple
rts
H283B lda #$00
rts
installdev php how many drives (carry).
lda idxl+1 get index to global device table
and #$07 for this slot...
asl
tay into y reg.
asl
asl now form device # = slot #
asl in high nibble.
jsr stadrv OR in low nibble, store in dev list.
plp restore # of devices in carry.
ror a if 2 drives, then bit 7=1.
bpl H2853 branch if a 1 drive device (e.g. hard drive)
inx else presume that 2nd drive is present.
sta devlist,x active device list.
H2853 stx numdevs save updated device count.
asl shift # of drives back into carry.
lda driveradr get high address of device driver.
sta drivertbl1,y device driver table 1.
bcc H2862 branch if single drive.
sta drivertbl2,y device driver table 2.
H2862 lda driveradr+1
sta drivertbl1+1,y
bcc H286D
sta drivertbl2+1,y
H286D rts
* query smartport status to determine # of devices
* and install up to 4 units in table if card is in slot 5
* otherwise only 2 units. this includes a patch #74
smartprt jsr setdevid setup the devid byte from attributes
lda idxl+1
sta driveradr+1
lda driveradr
sta pscall+1 modify operand
clc
adc #$03
sta spvect+1
lda driveradr+1
sta spvect+2
sta pscall+2 modify operand
asl convert $Cn to $n0
asl
asl
asl
sta unitnum unit number
stz A4L force a prodos status call
stz buf dummy pointer
stz bloknml # of bytes to transfer
stz bloknml+1
lda #$10
sta buf+1 dummy pointer should be <> 0
* do a prodos status call patched in from above
pscall jsr $0000 self modifying code
ldy #$FB
lda (idxl),y check device id
and #$02 SCSI?
beq H28B1 no, no need to init Cocoon
sta statunit device = 2 for SCSI
* initialize SCSI Cocoon to build internal device tables
* and report true # of devices attached
jsr spvect status of Cocoon
.HS 00
.DA spcparms' ignore any errors.
H28B1 stz statunit set unit# = 0
jsr spvect call to get the device count.
.HS 00 this is a status call
.DA spcparms'
lda numdev2
beq donesp no devices, so done.
cmp #$02 carry set if 2,3,4
jsr installdev do the 1st and 2nd device if exists.
lda idxl+1
cmp #$C5
bne donesp if not slot 5
* for slot 5, if there is a disk card in slot 2
* then only install 2 devices otherwise map
* extra devices as slot 2
bit diskins2 disk in slot 2 ?
bpl donesp yes - so done
lda numdev2
cmp #$03 carry set if 3,4,...
bcc donesp
cmp #$04 carry set if 4,5,6,...
lda #$C2 map extra devices as slot 2
sta idxl+1
jsr installdev
lda #$C5
sta idxl+1
donesp jmp nxtdsk2 it's a disk device.
setdevid ldy #$FE check attributes byte.
H28E8 lda (idxl),y
lsr a move hi nibble to lo nibble for
lsr a device table entries.
lsr a
lsr a
sta devid
rts
* check unknown card to see if disk id = $Cn00:nn 20 nn 00 nn 03
cmpid lda clrrom switch out $C8 ROMs
ldy #$05
H28F6 lda (idxl),y compare id bytes
cmp dskid,y
sec set if no disk card
bne H2903
dey
dey
bpl H28F6 loop until all 4 id bytes match.
clc clear if disk card
H2903 rts
* smartport call parameters
spcparms .DA #$03 # of parms
statunit .DA #$00 unit number (code for smartport stat)
.DA numdev2
.DA #00 status code (0 = general status)
* indexes into driver table
driveridx .DA #$06 s3, d1
.DA #$1E s7, d2
.DA #$0E s7, d1
.DA #$1C s6, d2
.DA #$0C s6, d1
.DA #$1A s5, d2
.DA #$0A s5, d1
.DA #$14 s2, d2
.DA #$04 s2, d1
.DA #$12 s1, d2
.DA #$02 s1, d1
.DA #$18 s4, d2
.DA #$08 s4, d1
* self modifying jmp = smartport entry address
spvect jmp $0000 self modifying
newmount stz idxl
lda #$C7 start with slot 7 ($C700)
sta idxl+1
H291F jsr H29EB is there a smartport device here?
bcs H2974 no, next device.
ldy #$FF get smartport address.
lda (idxl),y
clc
adc #$03 add 3 for smartport call
sta spvect+1
lda idxl+1
sta spvect+2
dey
jsr H28E8 set up device attributes
stz statunit
jsr spvect do a status call on smartport itself
.HS 00
.DA spcparms'
lda numdev2 # of devices on smartport
cmp #$03
bcc H2974 only 2 devices,skip to next one.
inc add 1 for comparisons.
sta driveradr # of devices + 1.
lda #$03 start at unit #3 (non-slot 5)
ldx spvect+2
cpx #$C5 is this slot 5?
bne H295B no, start at 3.
bit diskins2 disk controller in slot 2?
bpl H295B yes, so allow remapping of s5 devices
lda #$05 else start looking at unit #5
* find block devices on this smartport
H295B cmp driveradr have we done all units in this slot?
bcs H2974 yes, skip to next slot.
sta statunit store the unit#.
jsr spvect do status call
.HS 00
.DA spcparms'
lda numdev2 is this a block device?
bmi mount yes, so mount it.
H296E lda statunit go check the next unit#
inc
bra H295B
H2974 dec idxl+1
lda idxl+1
cmp #$C0 searched down to slot 0?
bne H291F if not.
rts
mount ldx #$0C
H297F ldy driveridx,x
lda drivertbl1,y device driver table 1
cmp #nodevice
bne H2990
lda drivertbl1+1,y
cmp /nodevice
beq H2994
H2990 dex
bpl H297F
rts ran out of space for devices, exit.
* empty slot found
H2994 lda idxl+1
pha
phx
phy
tya which slot is empty?
lsr a shift into slot#
and #$07 now 1-7
ora #$C0 now $C1-$C7
sta idxl+1
jsr H29EB smartport interface in this slot?
ply
plx
pla
sta idxl+1
bcc H2990 yes, can't use to mirror the device.
jsr lc1in write enable LC ram bank 1.
tya divide index by 2
lsr a
tax
lda statunit
sta spunit-1,x store the smartport unit #
lda spvect+1 and entry address.
sta spvectlo-1,x
lda spvect+2
sta spvecthi-1,x
lda romin write protect lc ram.
inc numdevs
ldx numdevs
tya
lsr a
cmp #$08
bcc nodev2 drive 2 mount
sbc #$08
ora #$08
nodev2 asl
asl
asl
asl
ora devid include device attributes
sta devlist,x in the active device list.
lda #<remap_sp
sta drivertbl1,y device driver table 1
lda #>remap_sp
sta drivertbl1+1,y
bra H296E
H29EB jsr cmpid is it a disk controller?
bcs H29F8 no, so return.
sec assume no smartport
ldy #$07
lda (idxl),y is it a smartport?
bne H29F8 if not.
clc smartport found
H29F8 rts
* relocation subroutine. on entry, regs yx = address of parameter table
* with the following parameters:
*
* (1) command: 0 = zero destination range
* 1 = move data from src to ZP.DstPtr
* 2 = hi addr ref tbl, relocate and move
* 3 = lo/hi addr ref tbl, relocate and move
* 4 = program, relocate and move
* >4 = end of sequence of commands
* (2) destination
* (2) length
* (2) source
* (1) # of address ranges (n) to be relocated
* (n+1) list of low page addresses to be relocated
* (n+1) list of high page addresses to be relocated
* (n+1) list of offset amounts to be added to be added
* if low and high limits have not been met
*
* on exit, carry set if error and yx = addr of error
* with acc = $00 for table error or $FF if illegal opcode
reloc stx idxl save address of control table
sty idxl+1
rloop lda (idxl) get relocation command.
cmp #$05
bcs rlend taken if >= 5 then done.
tax move destination to page 0
ldy #$01 for indirect access.
lda (idxl),y
sta ZP.DstPtr
iny
lda (idxl),y
sta ZP.DstPtr+1
iny
lda (idxl),y also the length (byte count)
sta cnt of the destination area.
iny
lda (idxl),y
sta cnt+1
bmi rlerr branch if >= 32k.
txa is it a request to zero destination?
beq zero if yes.
iny
lda (idxl),y get source address.
sta src used for move.
sta cde used for relocation
iny
clc
adc cnt add length to get final address
sta ecde
lda (idxl),y
sta src+1
sta cde+1
adc cnt+1
sta ecde+1
dex test for 'move' command
beq H2AA3 branch if move only (no relocation)
stx wsize save element size (1,2,3)
iny
lda (idxl),y get # of ranges that are valid
sta sgcnt relocation target addresses.
tax separate serial range groups into tbls
H2A42 iny
lda (idxl),y transfer low limits to 'limlo' table
sta limlo,x
dex
bpl H2A42
ldx sgcnt # of ranges
H2A4E iny
lda (idxl),y transfer high limits to 'limhi' table
sta limhi,x
dex
bpl H2A4E
ldx sgcnt # of ranges
H2A5A iny
lda (idxl),y transfer offsets to 'ofset' table
sta ofset,x
dex
bpl H2A5A
jsr adjtbl adj index pointer to next entry.
ldx wsize test for machine code relocation
cpx #$03
beq rlcode branch if program relocation
jsr reladr otherwise, relocate addresses in
H2A70 jsr move tables then move to destination.
bra rloop do next table
rlend clc
rts
rlerr jmp tblerr
rlcode jsr rlprog relocate machine code refs
bra H2A70
* fill destination range with 0's
zero jsr adjtbl adj table pointer to next entry.
lda #$00
ldy cnt+1 is it at least 1 page?
beq H2A94 branch if not.
tay
H2A89 sta (ZP.DstPtr),y
iny
bne H2A89
inc ZP.DstPtr+1 next page
dec cnt+1
bne H2A89 if more pages to clear.
H2A94 ldy cnt any bytes left to 0?
beq H2AA0 if not.
tay
H2A99 sta (ZP.DstPtr),y zero out remainder
iny
cpy cnt
bcc H2A99
H2AA0 jmp rloop
H2AA3 jsr adjtbl
bra H2A70
adjtbl tya add previous table length to
sec get next entry position in table
adc idxl
sta idxl
bcc H2AB2
inc idxl+1
H2AB2 rts
move lda src+1 is move up, down or not at all?
cmp ZP.DstPtr+1
bcc movup
bne movdn
lda src
cmp ZP.DstPtr
bcc movup
bne movdn
rts no move.
movup ldy cnt+1 calc highest page to move up
tya and adj src and ZP.DstPtr.
clc
adc src+1
sta src+1
tya
clc
adc ZP.DstPtr+1
sta ZP.DstPtr+1
ldy cnt move partial page 1st.
beq H2ADE taken if no partial pages
H2AD6 dey
lda (src),y
sta (ZP.DstPtr),y
tya end of page transfer?
bne H2AD6 no
H2ADE dec ZP.DstPtr+1
dec src+1
dec cnt+1 done with all pages?
bpl H2AD6 no
rts
movdn ldy #$00
lda cnt+1 partial page move only?
beq H2AFC taken if < 1 page to move
H2AED lda (src),y
sta (ZP.DstPtr),y
iny
bne H2AED
inc ZP.DstPtr+1 next page
inc src+1
dec cnt+1 more pages?
bne H2AED if more.
H2AFC lda cnt move partial page.
beq H2B09 if no more to move
H2B00 lda (src),y
sta (ZP.DstPtr),y
iny
cpy cnt
bne H2B00
H2B09 rts
* relocate addresses
reladr ldy wsize 1 or 2 byte reference
dey
lda (cde),y
jsr adjadr relocate reference.
lda wsize update and test code pointer.
jsr adjcde
bcc reladr if more to do
rts
rlprog ldy #$00 get next opcode
lda (cde),y
jsr oplen determine if a 3 byte instruction.
beq rperr branch if not an opcode
cmp #$03
bne H2B30
ldy #$02
jsr adjadr relocate address
lda #$03
H2B30 jsr adjcde update and test if done.
bcc rlprog if more to do
rts
rperr pla
pla
ldx cde bad code address in y,x
ldy cde+1
lda #$FF indicates bad opcode
sec
rts
tblerr ldx idxl bad table address in y,x
ldy idxl+1
lda #$00 indicates input table error
sec
rts
adjadr lda (cde),y get page address and
ldx sgcnt test against limits.
H2B4D cmp limlo,x is it >= low?
bcc H2B59 if not.
cmp limhi,x is it <= high?
bcc H2B5D branch if it is
beq H2B5D
H2B59 dex try next limit set
bpl H2B4D
rts return w/o adjustment.
H2B5D clc add offset to form relocated
adc ofset,x page address and replace
sta (cde),y old address with result.
rts
adjcde clc update code pointer
adc cde
ldy cde+1
bcc H2B6C branch if not page cross
iny otherwise, update page#.
H2B6C cpy ecde+1 has all code/data been processed?
bcc H2B72 if not.
cmp ecde
H2B72 sta cde save updated values.
sty cde+1
rts return result (carry set = done).
oplen pha form index to tbl & which 2-bit group.
and #$03 low 2 bits specify group
tay
pla
lsr a upper 6 bits specify byte in table
lsr a
tax
lda opcodln,x
nxgroup dey is opcode len in lowest 2 bits of acc?
bmi H2B89 branch if it is
lsr a shift to next group.
lsr a (if length = 0 then error)
bne nxgroup
H2B89 and #$03
rts if z-set then error
* relocation table contains length of each opcode in 2-bit groups
opcodln .HS 0928193C0A280D3C
.HS 0B2A193F0A280D3C
.HS 0928193F0A280D3C
.HS 0928193F0A280D3C
.HS 082A113F0A2A1D0C
.HS 2A2A193F0A2A1D3F
.HS 0A2A193F0A280D3C
.HS 0A2A193F0A280D3C
wsize .HS 00
sgcnt .HS 00
limlo .HS 0000000000000000
limhi .HS 0000000000000000
ofset .HS 0000000000000000
* patch to gsos vectors so error is returned for os calls - rev note #101
patch101 .OP 65816
php
sei disable interrupts
clc
xce full native mode
phb save DBR
pha
pha
pea $0000 length of patch
pea $0010 0000/0010 = 16 bytes
pea $3101 user id for prodos 8
pea $8018 attributes (locked/nospec/nocross)
pha
pha
_NewHandle
lda $01,s retrieve handle
tax
lda $03,s
tay
pea $0000 copy the code into the handle
pea L2C4D
phy
phx
pea $0000 length of patch = 0000/0010
pea $0010
_PtrToHand
plx low word of handle
plb set DBR to handle's bank
lda |1,x get upper 16 bits of 24 bit address
tay save in y
lda |0,x get low 8 bits of address
and #$00FF clear high byte
xba put address in high byte
ora #$005C include JML opcode
sta >GSOS2 store in gsos vectors
clc
adc #$000B
sta >GSOS
tya store upper 16 bits too
sta >GSOS2+2
adc #$0000 adj for possible page crossing
sta >GSOS+2
plb remove garbage byte from stack
plb restore DBR.
sec
xce back to emulation mode
plp
rts
* copy of the code that goes in the handle
L2C4D lda $01,s
sta $07,s
lda $02,s
sta $08,s
pla
pla
pla
lda #$00FF #NoOS
sec
rtl
.BS $2C80-*
MAN
SAVE USR/SRC/PRODOS.203/PRODOS.S.LDR
LOAD USR/SRC/PRODOS.203/PRODOS.S
ASM
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