A2osX/A2osX.S.txt

PR#3
PREFIX /A2OSX.BOOT
DELETE A2OSX.SYSTEM
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF /A2OSX.BOOT/A2OSX.SYSTEM,TSYS
*--------------------------------------
				.INB INC/MACROS.I
				.INB INC/A2OSX.I
				.INB INC/IO.I
				.INB INC/MONITOR.I
				.INB INC/PRODOS.I
*--------------------------------------
TmpPtr1			.EQ	$0					main & aux ZP
TmpPtr2			.EQ	$2					main & aux ZP
*--------------------------------------
A2osX.RelocAddr	.EQ $1000
A2osX.KMLOAD	.EQ $2000
A2osX.KMMAXLEN	.EQ $4000
A2osX.OpenBuff1	.EQ $6000				1024 Buffer for MLIOPEN01
A2osX.OpenBuff2	.EQ $6400				1024 Buffer for MLIOPEN02
A2osX.ReadBuff	.EQ	$6800				512 Buffer for MLIREAD01
Boot.Prefix		.EQ $6A00				MLI.MAXPATH
KM.Filename		.EQ $6A80				MLI.MAXPATH
*--------------------------------------
A2osX.Start		.EQ *
				.PH	A2osX.RelocAddr
A2osX.Init0		

				ldx	#$FF				init 6502 stack to highest
				txs
				
				>LDYAI A2osX.Start
				>STYA TmpPtr1
				>LDYAI A2osX.RelocAddr
				>STYA TmpPtr2

				ldx #$10				reloc $2000-$2FFF to $1000-$1FFF
				ldy #0
				
.1				lda (TmpPtr1),y
				sta (TmpPtr2),y
				iny
				bne .1
				
				inc TmpPtr1+1
				inc TmpPtr2+1
				dex
				bne .1

				jmp A2osX.Init1
*--------------------------------------
A2osX.Init1		bit RROMBNK1
				jsr HOME
				>LDAXI MSG.STAGE0
				jsr PrintCStrAX

				>LDAXI MSG.SYSMEM
				jsr PrintCStrAX

				lda MACHID
				and #MACHID.RAM
				cmp #MACHID.RAM.128
				beq .1

				>LDAXI MSG.SYSMEM.KO
				jsr PrintCStrAX
				bra *

.1				lda #$8C				Reset 80 col screen ($0C=FF=HOME)
				jsr $C300

				>LDAXI MSG.STAGE0
				jsr PrintCStrAX

				>LDAXI MSG.SYSMEM
				jsr PrintCStrAX

				>LDAXI MSG.SYSMEM.OK
				jsr PrintCStrAX
*--------------------------------------
A2osX.SetHZ		lda #6
				sta A2osX.HZ
				pha						push HZ
				>LDAXI MSG.HZ
				jsr PrintCStrAX
*--------------------------------------
				>LDAXI MSG.CPU
				jsr PrintCStrAX
				jsr Init6502			Y = CPU type
				tya
				ora #$60
				sta A2osX.CPUTYPE
				
				lda MSG.CPUTYPEH,y
				tax
				lda MSG.CPUTYPEL,y
				jsr PrintCStrAX
				
				lda A2osX.CPUTYPE
				bne .1
				>LDAXI MSG.CPU.KO
				jsr PrintCStrAX
				bra *
*--------------------------------------
.1				lda MACHID
				and #MACHID.TYPE
				cmp #MACHID.TYPE.IIc
				beq A2osX.Prefix
				
				>LDAXI MSG.CPU.SPEED
				jsr PrintCStrAX

				stz A2osX.RANDOM16
				stz A2osX.RANDOM16+1
				
				php
				sei
				
.2				bit VBL
				bpl .2

.21				bit VBL
				bmi .21

				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
*--------------------------------------
A2osX.Prefix	>LDAXI MSG.BOOTPREFIX
				jsr PrintCStrAX
				jsr MLI
				.DA #MLIGETPREFIX
				.DA MLIGETPREFIX01
				bcs *
				ldx Boot.Prefix
				stx A2osX.QC.B.Start+4
				ldy #1
.1				lda Boot.Prefix,y
				sta A2osX.QC.B.Start+4,y
				ora #$80
				jsr COUT
				iny
				dex
				bne .1
				jsr CROUT
*--------------------------------------
A2osX.RamDrv	>LDAXI MSG.RAMDRV
				jsr PrintCStrAX

				jsr DisableRamDRV
				bcc .2

				tax
				bne .1
				>LDAXI MSG.RAMDRV.KO0
				jsr PrintCStrAX
				bra A2osX.Z80
				
.1				>LDAXI MSG.RAMDRV.KO1
				jsr PrintCStrAX
				bra A2osX.Z80
				
.2				>LDAXI MSG.RAMDRV.OK
				jsr PrintCStrAX
*--------------------------------------
A2osX.Z80		>LDAXI MSG.Z80
				jsr PrintCStrAX
				jsr InitZ80
				bcs .1
				pha 					Push  Z80Slot
				
				>LDAXI MSG.Z80.OK
				jsr PrintCStrAX
				bra A2osX.SetupQC

.1				>LDAXI MSG.Z80.KO
				jsr PrintCStrAX
*--------------------------------------
A2osX.SetupQC	lda RRAMWRAMBNK2
				lda RRAMWRAMBNK2

				ldx #0
.1				lda A2osX.QC.B.Start,x
				sta $D100,x
				lda A2osX.QC.B.Start+$100,x
				sta $D200,x
				inx
				bne .1

				ldx #$C0
.2				lda	A2osX.GP.B.start-1,x
				sta $D300-1,x
				dex
				bne .2
				
				ldx #$20
.3				lda	$BEE0-1,x
				sta $D3E0-1,x
				dex
				bne .3

				lda RROMBNK1
*--------------------------------------
A2osX.EnumKM	>LDAXI MSG.KMENUM
				jsr PrintCStrAX
				jsr EnumKM
*--------------------------------------
A2osX.MLIQuit	>LDAXI MSG.STAGE0OK
				jsr PrintCStrAX

				>DEBUGOA
				
				jsr MLI
				.DA #MLIQUIT
				.DA MLIQUIT01
				bra *
*--------------------------------------
* Out:
*  Y = 0, 6502
*  Y = 1, 65C02
*  Y = 2, R65C02
*  Y = 3, 65C816
*--------------------------------------
Init6502		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				rts
*--------------------------------------
DisableRamDRV	php
				sei
				lda DEVPTRS3D2
				cmp DEVPTRS0D1
				bne .1
				lda DEVPTRS3D2+1
				cmp DEVPTRS0D1+1
				beq .9					S3D2=NODEV, nothing to do
				
.1				ldx DEVCNT

.2				lda DEVLST,x			LOOKING FOR $BF, $BB, $B7, $B3
				and #$F3
				cmp #$B3
				beq .3
				
				dex
				bpl .2
				
				plp
				lda #1					No device found, exit with error
				sec
				rts
				
.3				cpx DEVCNT
				beq .5

.4				lda DEVLST+1,x
				sta DEVLST,x
				inx
				cpx DEVCNT
				bne .4
				
.5				ldx DEVCNT
				stz DEVLST,x
				dec DEVCNT
				
				lda DEVPTRS0D1
				sta DEVPTRS3D2
				lda DEVPTRS0D1+1
				sta DEVPTRS3D2+1
				plp
				
				jsr MLI
				.DA #MLIONLINE
				.DA MLIONLINE01
				clc						Success!!
				rts
				
.9				plp
				lda #0					Not detected
				sec
				rts
*--------------------------------------
InitZ80			ldx #Z80Code.Size
.1				lda Z80Code.Start-1,x
				sta $1000-1,x				00000H for Z80
				dex
				bne .1
				
				stz TmpPtr1
				lda #$C1
				sta TmpPtr1+1
				
.2				sta (TmpPtr1)
				lda $100D
				bmi .8
				inc TmpPtr1+1
				lda TmpPtr1+1
				cmp #$C8
				beq .9
				clc
				adc #$20
				sta $100A
				bra .2
				
.8				lda TmpPtr1+1
				and #$0F
				sta A2osX.Z80Slot
				clc
				rts
				
.9				stz A2osX.Z80Slot
				sec
				rts
*--------------------------------------
				.INB A2OSX.S.KM
				.INB A2OSX.S.TOOLS
*--------------------------------------
MSG.STAGE0		>CSTRING "A2osX[Stage0]:Init\n"
MSG.SYSMEM		>CSTRING "Checking System Memory..."
MSG.SYSMEM.OK	>CSTRING "128k Detected.\n"
MSG.SYSMEM.KO	>CSTRING "A2osX Requires At Least 128k Memory.\n"
MSG.HZ			>CSTRING "Kernel SYS Timer Setup For %d0 hz.\n"
MSG.CPU			>CSTRING "Checking CPU..."
MSG.CPU.KO		>CSTRING "A2osX Requires At Least A 65C02 CPU.\n"
MSG.CPU.SPEED	>CSTRING "Detecting CPU Speed..."
MSG.CPU.SPEEDOK	>CSTRING "%d.%02d Mhz.\n"
MSG.BOOTPREFIX	>CSTRING "Boot Prefix:"
MSG.RAMDRV		>CSTRING "Checking ProDOS RamDrive..."
MSG.RAMDRV.OK	>CSTRING "Successfully Disabled.\n"
MSG.RAMDRV.KO0	>CSTRING "Not Detected.\n"
MSG.RAMDRV.KO1	>CSTRING "Uninstall Failed !!!\n"
MSG.Z80			>CSTRING "Detecting Z80 CPU..."
MSG.Z80.OK		>CSTRING "Detected In Slot %d.\n"
MSG.Z80.KO		>CSTRING "Not Detected.\n"
MSG.KMENUM		>CSTRING "Looking For Kernel Modules...\n"
MSG.KMLOAD		>CSTRING "***Loading KM : "
MSG.STAGE0OK	>CSTRING "A2osX[Stage0]:Complete.\n"
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		>CSTRING "6502.\n"
MSG.65C02		>CSTRING "65C02.\n"
MSG.65R02		>CSTRING "65R02.\n"
MSG.65816		>CSTRING "65816.\n"
*--------------------------------------
MLIGETPREFIX01	.DA #1
				.DA Boot.Prefix
MLIONLINE01		.DA #2
				.DA #0
				.DA MLIONLINE01BUF
MLIONLINE01BUF	.BS 256				
MLIOPEN01		.DA #3					For DIR listing
				.DA Boot.Prefix
				.DA A2osX.OpenBuff1		
				.BS 1
MLIREAD01		.DA #4
				.BS 1
				.DA A2osX.ReadBuff		Load address Dir Blocks
				.DA $200				Maxlen of Dir Blocks (512)
				.BS 2
MLICLOSE01		.DA #1
				.BS 1
MLIOPEN02		.DA #3
				.DA KM.Filename
				.DA A2osX.OpenBuff2
				.BS 1
MLIREAD02		.DA #4
				.BS 1
				.DA A2osX.KMLOAD		Load address for KMs
				.DA A2osX.KMMAXLEN		Maxlen of KM
				.BS 2
MLICLOSE02		.DA #1
				.BS 1
MLIQUIT01		.DA #4
				.DA #0
				.DA 0
				.DA #0
				.DA 0
*--------------------------------------
SYS				>PSTRING "SYS/"
KM.PREFIX		>PSTRING "KM."
*--------------------------------------
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.End		.EQ *
Z80Code.Size	.EQ Z80Code.End-Z80Code.Start
*--------------------------------------
				.EP
A2osX.End		.EQ *
A2osX.SIZE		.EQ A2osX.End-A2osX.Start
				.BS $1000-A2osX.SIZE
*--------------------------------------
				.INB A2OSX.S.QC
				.INB A2OSX.S.GP
*--------------------------------------
MAN
SAVE A2OSX.S
ASM