mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-23 07:35:19 +00:00
311 lines
6.1 KiB
Plaintext
311 lines
6.1 KiB
Plaintext
PR#3
|
||
PREFIX /A2OSX.BUILD
|
||
LOMEM $A00
|
||
INC 1
|
||
AUTO 6
|
||
*--------------------------------------
|
||
Kernel.Init2 sei
|
||
lda RROMBNK1 Make sure ROM is enabled for X.PRINT.F
|
||
|
||
>LDAXI MSG.Init2
|
||
jsr PrintCStrAX
|
||
|
||
>LDYAI A2osX.GP
|
||
>STYA ZPPtr1
|
||
>LDYAI A2osX.SYSCALL
|
||
>STYA ZPPtr2
|
||
>LDYAI A2osX.GP.S^$FFFF
|
||
>STYA ZPPtr3
|
||
jsr Kernel.Move
|
||
|
||
sta CLRALTZP
|
||
bit RROMBNK1
|
||
|
||
>LDAXI MSG.D000BNK2
|
||
jsr PrintCStrAX
|
||
|
||
sta SETALTZP
|
||
lda RRAMWRAMBNK2
|
||
lda RRAMWRAMBNK2
|
||
|
||
>LDYAI A2osX.D2
|
||
>STYA ZPPtr1
|
||
>LDYAI $D000
|
||
>STYA ZPPtr2
|
||
>LDYAI A2osX.D2.S^$FFFF
|
||
>STYA ZPPtr3
|
||
jsr Kernel.Move
|
||
|
||
sta CLRALTZP
|
||
bit RROMBNK1
|
||
|
||
>LDAXI MSG.D000BNK1
|
||
jsr PrintCStrAX
|
||
|
||
sta SETALTZP
|
||
lda RRAMWRAMBNK1
|
||
lda RRAMWRAMBNK1
|
||
|
||
>LDYAI A2osX.D1
|
||
>STYA ZPPtr1
|
||
>LDYAI $D000
|
||
>STYA ZPPtr2
|
||
>LDYAI A2osX.D1.S^$FFFF
|
||
>STYA ZPPtr3
|
||
jsr Kernel.Move
|
||
|
||
sta CLRALTZP
|
||
bit RROMBNK1
|
||
|
||
>LDAXI MSG.E000
|
||
jsr PrintCStrAX
|
||
|
||
sta SETALTZP
|
||
lda RRAMWRAMBNK1
|
||
lda RRAMWRAMBNK1
|
||
|
||
>LDYAI A2osX.E0
|
||
>STYA ZPPtr1
|
||
>LDYAI $E000
|
||
>STYA ZPPtr2
|
||
>LDYAI A2osX.E0.S^$FFFF
|
||
>STYA ZPPtr3
|
||
jsr Kernel.Move
|
||
|
||
>LDYAI D.STACK.TOP
|
||
>STYA pStack init Soft Stack
|
||
|
||
sta CLRALTZP Make MAIN ZP is enabled for X.PRINT.F
|
||
bit RROMBNK1 Make sure ROM is enabled for X.PRINT.F
|
||
cli
|
||
|
||
lda A2osX.HZ
|
||
pha push HZ
|
||
>LDAXI MSG.HZ
|
||
jsr PrintCStrAX
|
||
|
||
jsr CPU.Init
|
||
|
||
>LDAXI MSG.Init2.OK
|
||
jsr PrintCStrAX
|
||
rts Do NOT replace this JSR/RTS with a JMP
|
||
*--------------------------------------
|
||
Kernel.Move ldy #0
|
||
.1 inc ZPPtr3
|
||
bne .2
|
||
inc ZPPtr3+1
|
||
beq .9
|
||
|
||
.2 lda (ZPPtr1),y
|
||
sta (ZPPtr2),y
|
||
iny
|
||
bne .1
|
||
|
||
inc ZPPtr1+1
|
||
inc ZPPtr2+1
|
||
bne .1
|
||
.9 rts
|
||
*--------------------------------------
|
||
MSG.Init2 >CSTR "A2osX[Stage2]:Init\nInstalling KERNEL...\n - Global Page...\n"
|
||
MSG.D000BNK1 >CSTR " - $D000 Bank1...\n"
|
||
MSG.D000BNK2 >CSTR " - $D000 Bank2...\n"
|
||
MSG.E000 >CSTR " - $E000...\n"
|
||
MSG.HZ >CSTR "Kernel SYS Timer Set For %d0 hz Machine.\n"
|
||
MSG.Init2.OK >CSTR "A2osX[Stage2]:Complete.\n"
|
||
*--------------------------------------
|
||
CPU.Init >LDAXI MSG.CPU
|
||
jsr PrintCStrAX
|
||
|
||
jsr Detect6502 A = CPU type
|
||
sta A2osX.CPUTYPE
|
||
lda MSG.CPUTYPEH,y
|
||
tax
|
||
lda MSG.CPUTYPEL,y
|
||
jsr PrintCStrAX
|
||
|
||
lda MACHID
|
||
and #MACHID.TYPE
|
||
cmp #MACHID.TYPE.IIc
|
||
beq CPU.Init.Z80
|
||
|
||
>LDAXI MSG.CPU.SPEED
|
||
jsr PrintCStrAX
|
||
|
||
stz A2osX.RANDOM16
|
||
stz A2osX.RANDOM16+1
|
||
|
||
php
|
||
sei
|
||
|
||
.1 bit VBL
|
||
bpl .2
|
||
|
||
.2 bit VBL
|
||
bmi .2
|
||
|
||
ldx #0 Count LO
|
||
lda #0 Count HI
|
||
|
||
.3 ldy #3 (2)
|
||
|
||
.4 nop (2)
|
||
dey (2)
|
||
bne .4 (2*)
|
||
|
||
inc A2osX.RANDOM16 (6)
|
||
bne .5 (2*)
|
||
|
||
inc A2osX.RANDOM16+1 (6)
|
||
bit VBL (4)
|
||
bpl .3 (2*)
|
||
bmi .6
|
||
|
||
.5 nop (2)
|
||
nop (2)
|
||
nop (2)
|
||
bit VBL (4)
|
||
bpl .3 (2*)
|
||
|
||
.6 plp
|
||
|
||
stz A2osX.CPUSPEED
|
||
|
||
.7 sec
|
||
lda A2osX.RANDOM16
|
||
sbc #100
|
||
tax
|
||
lda A2osX.RANDOM16+1
|
||
sbc /100
|
||
bcc .8
|
||
|
||
stx A2osX.RANDOM16
|
||
sta A2osX.RANDOM16+1
|
||
inc A2osX.CPUSPEED
|
||
bra .7
|
||
|
||
.8 lda A2osX.RANDOM16
|
||
sta A2osX.CPUSPEED+1
|
||
pha push CPU speed LO
|
||
lda A2osX.CPUSPEED
|
||
pha push CPU speed HI
|
||
>LDAXI MSG.CPU.SPEEDOK
|
||
jsr PrintCStrAX
|
||
|
||
CPU.Init.Z80 >LDAXI MSG.Z80
|
||
jsr PrintCStrAX
|
||
jsr DetectZ80
|
||
bcs .9
|
||
sta A2osX.Z80SLOT
|
||
pha Push Z80Slot
|
||
|
||
tax
|
||
lda #A2osX.SLOTS.Z80
|
||
sta A2osX.SLOTS,x
|
||
|
||
>LDAXI MSG.Z80.OK
|
||
jsr PrintCStrAX
|
||
rts
|
||
|
||
.9 >LDAXI MSG.Z80.KO
|
||
jsr PrintCStrAX
|
||
rts
|
||
*--------------------------------------
|
||
* Out:
|
||
* A = $60, 6502
|
||
* A = $61, 65C02
|
||
* A = $62, R65C02
|
||
* A = $63, 65C816
|
||
*--------------------------------------
|
||
Detect6502 ldy #0 Test 6502 BCD bug
|
||
sed
|
||
lda #$99
|
||
clc
|
||
adc #$01
|
||
cld
|
||
bmi .9 BUG!, we have 6502
|
||
|
||
ldy #3 test 65C816 TYX Instruction
|
||
ldx #0
|
||
.OP 65816
|
||
tyx TYX: if 65C816, x becomes non-zero
|
||
.OP 65C02
|
||
bne .9 worked! 65C816
|
||
|
||
dey y=2 -> R65C02
|
||
ldx $EA save zp $EA
|
||
stz $EA store 0 in $EA
|
||
* .OP 65R02
|
||
.HS F7EA For compatibility with A2osX.ASM
|
||
* smb 7,$EA if not Rockwell, assemble as nop nop
|
||
* .OP 65C02
|
||
asl $EA cs if Rockwell
|
||
stx $EA restore zp $EA
|
||
bcs .9
|
||
|
||
dey y=1 -> 65C02
|
||
|
||
.9 tya
|
||
ora #$60
|
||
rts
|
||
*--------------------------------------
|
||
* Out:
|
||
* A = Z80 Slot
|
||
*--------------------------------------
|
||
DetectZ80 ldx #Z80Code.Size
|
||
.1 lda Z80Code.Start-1,x
|
||
sta $1000-1,x 00000H for Z80
|
||
dex
|
||
bne .1
|
||
|
||
stz ZPPtr1
|
||
lda #$C1
|
||
sta ZPPtr1+1
|
||
|
||
.2 sta (ZPPtr1)
|
||
lda $100D
|
||
bmi .8
|
||
inc ZPPtr1+1
|
||
lda ZPPtr1+1
|
||
cmp #$C8
|
||
beq .9 CS
|
||
clc
|
||
adc #$20
|
||
sta $100A
|
||
bra .2
|
||
|
||
.8 lda ZPPtr1+1
|
||
and #$0F
|
||
clc
|
||
.9 rts
|
||
*--------------------------------------
|
||
Z80Code.Start .HS 31FFFF START: LD SP,0FFFFH Init Stack
|
||
.HS 3EFF LD A,0FFH Set Flag
|
||
.HS 320D00 LD (FLAG),A
|
||
.HS 3200E1 LD (0E100H),A Back to 6502
|
||
.HS 18F3 JR START Loop
|
||
.HS 00 FLAG: .DB 0
|
||
Z80Code.Size .EQ *-Z80Code.Start
|
||
*--------------------------------------
|
||
MSG.CPU >CSTR "Checking CPU..."
|
||
MSG.CPU.SPEED >CSTR "Detecting CPU Speed..."
|
||
MSG.CPUTYPEL .DA #MSG.6502
|
||
.DA #MSG.65C02
|
||
.DA #MSG.65R02
|
||
.DA #MSG.65816
|
||
MSG.CPUTYPEH .DA /MSG.6502
|
||
.DA /MSG.65C02
|
||
.DA /MSG.65R02
|
||
.DA /MSG.65816
|
||
MSG.6502 >CSTR "6502.\n"
|
||
MSG.65C02 >CSTR "65C02.\n"
|
||
MSG.65R02 >CSTR "65R02.\n"
|
||
MSG.65816 >CSTR "65816.\n"
|
||
MSG.CPU.SPEEDOK >CSTR "%d.%02d Mhz.\n"
|
||
MSG.Z80 >CSTR "Detecting Z80 CPU..."
|
||
MSG.Z80.OK >CSTR "Detected In Slot %d.\n"
|
||
MSG.Z80.KO >CSTR "Not Detected.\n"
|
||
MAN
|
||
SAVE /A2OSX.SRC/SYS/KERNEL.S.INIT2
|
||
LOAD /A2OSX.SRC/SYS/KERNEL.S
|
||
ASM
|