A2osX/A2osX.S.QC.txt
2022-03-13 13:52:24 +01:00

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NEW
AUTO 3,1
.LIST OFF
*--------------------------------------
* ****** START OF MLI QUIT CODE ******
* Load Address :$1000-$12FF
*--------------------------------------
.PH $1000
*--------------------------------------
* Kernel Stage 1
*--------------------------------------
A2osX.QC.Start .EQ *
A2osX.QC cld
jmp A2osX.QC.Start1
A2osX.QC.BOOT .BS 64
A2osX.QC.ROOT .BS 64
A2osX.QC.Start1 sei
ldx #$FF
txs
cli
bit RROMBNK1
>LDYAI A2osX.QC
>STYA POWERUP
jsr SETPWRC
lda #$01
sta MEMTABL+$17 protect ProDOS MLI Page
ldx #$16
.1 stz MEMTABL,x Reset ProDOS memory bitmap
dex
bne .1
lda #$CF protect zero page, stack and page 1
sta MEMTABL
lda #$8C Reset 80 col screen ($0C=FF=HOME)
jsr $C300
ldx $280 some /PATH/.SYSTEM file passed ?
beq A2osX.QC.Start2
.2 dex
lda $280,x
cmp #'/'
bne .2
stx A2osX.QC.BOOT get /PATH/ in QC.BOOT...
.3 lda $280,x
sta A2osX.QC.BOOT,x
dex
bne .3
jsr A2osX.QC.SetPFX cd to QC.BOOT...
bcs A2osX.QC.Start2
jsr A2osX.QC.Load
bcs A2osX.QC.Start2
*--------------------------------------
* $2000 = JMP $xxxx
* $2003 = $EE
* $2004 = $EE
* $2005 = BufSize
* $2006 = PathLen
* $2007... Path
*--------------------------------------
lda $2000
cmp #$4C
bne .8
lda #$EE
cmp $2003
bne .8
cmp $2004
bne .8
ldy $280
iny
lda $280,y
beq .8
cmp $2005
bcs .8
sta $2006
ldx #0
.4 iny
lda $280,y
inx
sta $2006,x
cpx $2006
bne .4
.8 jmp $2000
A2osX.QC.Start2 sec
>LDYAI MSG.INIT1
jsr A2osX.QC.PrintYA
.3 jsr A2osX.QC.SetPFX
bcc .4
>LDYAI MSG.SETPREFIXKO
clc
jsr A2osX.QC.PrintYA
>LDYAI A2osX.QC.BOOT
sec
jsr A2osX.QC.PrintYA
>DEBUG
bra .3
.4 >LDYAI MSG.SETPREFIXOK
clc
jsr A2osX.QC.PrintYA
>LDYAI A2osX.QC.BOOT
sec
jsr A2osX.QC.PrintYA
ldx A2osX.QC.BOOT
stx $280 For appending SYS/KERNEL
stz $2C0,x
.5 lda A2osX.QC.BOOT,x
sta $280,x
sta $2C0-1,x BOOT sz for KERNEL
dex
bpl .5
ldx A2osX.QC.ROOT
stz $2E0,x
.6 lda A2osX.QC.ROOT,x
sta $2E0-1,x ROOT sz for KERNEL
dex
bpl .6
ldx $280
ldy #0
.7 inx
iny
lda SYSKERNEL,y
sta $280,x
cpy SYSKERNEL
bne .7
stx $280
jsr A2osX.QC.Load
bcs *
.8 >LDYAI MSG.INIT1OK
sec
jsr A2osX.QC.PrintYA
A2osX.QC.JMP >DEBUGOA
jmp $2000
*--------------------------------------
A2osX.QC.SetPFX jsr MLI
.DA #MLISETPREFIX
.DA MLISETPREFIX03
rts
*--------------------------------------
A2osX.QC.Load >LDYAI MSG.LOAD
clc
jsr A2osX.QC.PrintYA
>LDYAI $280
clc
jsr A2osX.QC.PrintYA
jsr MLI
.DA #MLIOPEN
.DA MLIOPEN03
bcs .9
lda MLIOPEN03+5
sta MLIREAD03+1
sta MLICLOSE03+1
jsr MLI
.DA #MLIREAD
.DA MLIREAD03
php
pha
jsr MLI
.DA #MLICLOSE
.DA MLICLOSE03
pla
plp
bcc .8
.9 pha
>LDYAI MSG.LOAD.KO
clc
jsr A2osX.QC.PrintYA
pla
jsr PRBYTE
jsr CROUT
sec
rts
.8 >LDYAI MSG.LOAD.OK
sec
jsr A2osX.QC.PrintYA
clc
rts
*--------------------------------------
A2osX.QC.PrintYA
php
>STYA TmpPtr1
lda (TmpPtr1)
tax
beq .9
ldy #1
.1 lda (TmpPtr1),y
ora #$80
jsr COUT
iny
dex
bne .1
.9 plp
bcc .99
jsr CROUT
.99 rts
*--------------------------------------
MLISETPREFIX03 .DA #1
.DA A2osX.QC.BOOT
*--------------------------------------
MLIOPEN03 .DA #3
.DA $280
.DA $C00
.BS 1
*--------------------------------------
MLIREAD03 .DA #4
.BS 1
.DA $2000
.DA $9F00 Max .SYSTEM file len
.BS 2
*--------------------------------------
MLICLOSE03 .DA #1
.BS 1
*--------------------------------------
SYSKERNEL >PSTR "sys/kernel"
*--------------------------------------
MSG.INIT1 >PSTR "A2osX[Stage1]:Init"
MSG.SETPREFIXOK >PSTR "Prefix Set: "
MSG.SETPREFIXKO >PSTR "Insert Vol:"
MSG.LOAD >PSTR "Loading : "
MSG.LOAD.KO >PSTR " Error $"
MSG.LOAD.OK >PSTR " OK."
MSG.INIT1OK >PSTR "A2osX[Stage1]:Complete."
*--------------------------------------
.LIST ON
QC.FREE .EQ $1300-*
.LIST OFF
.EP
*--------------------------------------
MAN
SAVE usr/src/a2osx.s.qc
LOAD usr/src/a2osx.s
ASM