A2osX/DRV/PIC.DRV.S.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF	
				.OP	65C02
				.OR $2000
				.TF /A2OSX.BOOT/DRV/PIC.DRV
*--------------------------------------
				.INB /A2OSX.DEV/INC/MACROS.I
				.INB /A2OSX.DEV/INC/A2OSX.I
*--------------------------------------
ZPTmpPtr1		.EQ ZPDRV
*--------------------------------------
SIG.05			.EQ $48
SIG.07			.EQ $48
*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START		cld
				jmp Dev.Detect			cld,jmp abs=DRV
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					DRV Layout Version 1
				.DA 0
				.DA CS.END-CS.START			Code Length
				.DA DEV.HEADER-CS.START		Device Header Offset
				.DA DRV.CS.START-CS.START	Driver Code Offset
				.DA DRV.CS.END-DRV.CS.START	Drv Code Length
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT	.DA MSG.DETECT
L.MSG.DETECT.OK	.DA MSG.DETECT.OK
L.MSG.DETECT.KO	.DA MSG.DETECT.KO
L.DEV.HEADER.NAME	.DA DEV.HEADER.NAME
				.DA 0					End Of Reloc Table
*--------------------------------------
Dev.Detect		>LDYA L.MSG.DETECT
				>SYSCALL CPrintFYA
				
				stz ZPTmpPtr1
				lda #$C1
				sta ZPTmpPtr1+1
.1				ldy #5
				lda (ZPTmpPtr1),y
				cmp #SIG.05
				bne .2
				
				ldy #7
				lda (ZPTmpPtr1),y
				cmp #SIG.07
				beq .3

.2				inc ZPTmpPtr1+1
				lda ZPTmpPtr1+1
				cmp #$C8
				bne .1	

				>LDYA L.MSG.DETECT.KO
				>SYSCALL CPrintFYA

				lda #DEVMGR.ERRNOHW		Not Found in any slot, exiting
				sec
				rts	
				
.3				lda ZPTmpPtr1+1
				sta DEVSLOTCn
				and #$0F
				sta DEVSLOT0n
				ora #$30
				sta DEV.HEADER.NAME+4
				asl
				asl
				asl
				asl
				sta DEVSLOTn0
				
				>PUSHW L.DEV.HEADER.NAME
				>LDYA L.MSG.DETECT.OK
				>SYSCALL CPrintFYA
				clc
				rts
*--------------------------------------
CS.END
MSG.DETECT		>CSTR "Apple PIC (Parallel Interface Card).\n"
MSG.DETECT.OK	>CSTR "PIC Installed As Device : %S\n"
MSG.DETECT.KO	>CSTR "No PIC Found.\n"
*--------------------------------------
*			Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER		cld
				jmp (DRV.CS.START,x)
				.DA #S.DEV.F.EVENT+S.DEV.F.COUT+S.DEV.F.CHAR
DEV.HEADER.NAME	>PSTR "LPT1"			NAME
				.HS 00.00
				.HS 00.00.00.00
*--------------------------------------
*			Driver Code
*--------------------------------------
DRV.CS.START	.DA OPEN
				.DA GETEVENT
				.DA COUT
				.DA CLOSE
				.DA GETINFO
				.DA IRQ
L.DEVINFO		.DA DEVINFO
				.DA 0					end or relocation
*--------------------------------------
OPEN			clc
				rts
*--------------------------------------
GETEVENT		lda #0
				sec
				rts
*--------------------------------------
COUT			clc
				rts
*--------------------------------------
CLOSE			clc
				rts
*--------------------------------------
GETINFO			>LDYA L.DEVINFO
IRQ				clc
				rts
*--------------------------------------
DRV.CS.END
DEVSLOT0n		.BS 1
DEVSLOTCn		.BS 1
DEVSLOTn0		.BS 1
DEVINFO			.DA #S.DEVINFO.TYPE.CHAR
				.DA #0
*--------------------------------------
MAN
SAVE DRV/PIC.DRV.S
ASM