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A2osX/ProDOS.203/ProDOS.S.LDR.B.txt

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NEW
AUTO 3,1
* prodos greeting splash screen
LDR.Splash lda SPEAKER click speaker
sta CLR80DISP disable 80 col hardware
sta CLR80STORE 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 LDR.MSG.AppleII,x
sta vline10+16,x
dex
bpl .1
ldx #$1D
.2 lda LDR.MSG.ProDOS,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 LDR.MSG.Copyright,x
sta vline23,x
dex
bpl .4
ldx #$13
.5 lda LDR.MSG.Reserved,x
sta vline24+10,x
dex
bpl .5
sec
jsr idroutine returns system info
bcs .8 taken if not a //gs
lda #$80
trb newvideo video mode select
.8 lda SPEAKER click speaker
rts
* find all disk devices in system slots and set up address
* and device table in prodos global page. if there is a disk
* card in slot 2 then limit the # of devices in slot 5
* smartport to only 2
numdev2 .HS 0000000000000000 8 bytes for smartport call
driveradr .DA 0
d2idx .DA #0
diskins2 .DA #0 msb clear if drive in slot 2
devsrch stz dst
stz dst+1
stz idxl
ldx #$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 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 #$0B
lda (idxl),y
dec must = 1
bne H27E4
iny
lda (idxl),y
and #$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 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 move hi nibble to lo nibble for
lsr device table entries.
lsr
lsr
sta devid
rts
* check unknown card to see if disk id = $Cn00:nn 20 nn 00 nn 03
cmpid lda CLRC8ROM 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 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
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 RROMBNK2 write protect lc ram.
inc numdevs
ldx numdevs
tya
lsr
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 dst
* 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 dst
iny
lda (idxl),y
sta dst+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 moveSrcDst 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 (dst),y
iny
bne H2A89
inc dst+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 (dst),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
moveSrcDst lda src+1 is move up, down or not at all?
cmp dst+1
bcc movup
bne movdn
lda src
cmp dst
bcc movup
bne movdn
rts no move.
movup ldy cnt+1 calc highest page to move up
tya and adj src and dst.
clc
adc src+1
sta src+1
tya
clc
adc dst+1
sta dst+1
ldy cnt move partial page 1st.
beq H2ADE taken if no partial pages
H2AD6 dey
lda (src),y
sta (dst),y
tya end of page transfer?
bne H2AD6 no
H2ADE dec dst+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 (dst),y
iny
bne H2AED
inc dst+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 (dst),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 upper 6 bits specify byte in table
lsr
tax
lda opcodln,x
nxgroup dey is opcode len in lowest 2 bits of acc?
bmi H2B89 branch if it is
lsr shift to next group.
lsr (if length = 0 then error)
bne nxgroup
.BS $2B89-*
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 php
sei disable interrupts
clc
xce full native mode
>LONGMX
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
>IIGS 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
>IIGS 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 1,s
sta 7,s
lda 2,s
sta 8,s
pla
pla
pla
lda ##$00FF #NoOS
sec
rtl
.BS $2C80-*
RAMDRV.Install ldy #$99 move $9A bytesfrom lcsrc to lcdest.
.1 lda RAM,y transfer main bank portion of driver
sta RAMDRV,y
dey
cpy #$FF
bne .1
ldx #RAMX set up to move aux portion of driver
stx A1L
dex
stx A2L
ldx /RAMX
stx A1L+1
inx
stx A2L+1
lda #RAMXDRV
sta A4L
lda /RAMXDRV RAMX to RAMXDRV
sta A4L+1
sec irection = to aux bank.
jsr auxmove move aux bank portion of driver.
lda #RAMDRV put driver address into
sta drivertbl2+6 slot 3, drive 2.
lda /RAMDRV
sta drivertbl2+7
inc numdevs count (-1) active devices
ldx numdevs
lda #$BF unit num of /RAM
sta devlist,x
rts end of obj ram_1
RAM_1_END .EQ * end of /RAM installer
.BS $2D00-* pad 0's to page boundary
MAN
SAVE usr/src/prodos.203/prodos.s.ldr.b
LOAD usr/src/prodos.203/prodos.s
ASM
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