A2osX/DRV/PIC.DRV.S.txt

NEW
  AUTO 3,1
				.LIST OFF	
				.OP	65C02
				.OR $2000
				.TF drv/pic.drv
*--------------------------------------
				.INB inc/macros.i
				.INB inc/a2osx.i
				.INB inc/kernel.i
				.INB inc/mli.e.i
				.INB inc/com.i
*--------------------------------------
ZPTmpPtr1		.EQ ZPDRV
*--------------------------------------
*			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 0
				.DA #32					SS
				.DA #2					ZP
				.DA 0
*--------------------------------------
* 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.DRV.CS.START	.DA DRV.CS.START
L.FD.DEV		.DA FD.DEV
L.FD.DEV.NAME	.DA FD.DEV.NAME
				.DA 0					End Of Reloc Table
*--------------------------------------
Dev.Detect		>STYA ARGS
				
				>LDYA L.MSG.DETECT
				>SYSCALL PutS
				
				stz ZPTmpPtr1
				lda #$C1
				sta ZPTmpPtr1+1
				
.1				and #$0f
				tay
				lda A2osX.S-1,y
				bne .3

				ldx #DEVSIG.Length-1

.2				ldy DEVSIG.Offset,x
				lda (ZPTmpPtr1),y
				cmp DEVSIG.Value,x
				bne .3

				dex
				bpl .2

				bra .4

.3				inc FD.DEV.NAME+3
				inc ZPTmpPtr1+1			no match, try next slot....
				lda ZPTmpPtr1+1
				cmp #$C8
				bne .1	

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

				lda #MLI.E.NODEV		Not Found in any slot, exiting
				sec
				rts	

.4				lda ZPTmpPtr1+1
				and #$0F
				pha
				tay
				lda #A2osX.S.COM
				sta A2osX.S-1,y
				pla
				asl
				asl
				asl
				asl
				sta DEVSLOTn0

.8				>PUSHW L.MSG.DETECT.OK
				>PUSHW L.FD.DEV.NAME
				>PUSHBI 2
				>SYSCALL PrintF

				>PUSHWI DRV.END
				>PUSHWI DRV.CS.END-DRV.CS.START
				>PUSHWI DRV.CS.START
				>LDYA L.DRV.CS.START
				>SYSCALL InsDrv
				bcs .9

				>STYA FD.DEV+S.FD.DEV.DRVPTR

				>PUSHW L.FD.DEV
				>PUSHW L.FD.DEV.NAME
				>SYSCALL MKDev

.9				rts
*--------------------------------------
CS.END
DEVSIG.Offset	.HS 0507
DEVSIG.Value	.HS 4848
DEVSIG.Length	.EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT		.CZ "Apple PIC (Parallel Interface Card)"
MSG.DETECT.OK	.CZ "PIC Installed As Device : %s\r\n"
MSG.DETECT.KO	.CZ "No PIC Found."
ARGS			.BS 2
*--------------------------------------
FD.DEV			.DA #S.FD.T.CDEV
				.DA #0					HANDLER
				.DA #0					BUSID
				.DA #0					DEVID
				.DA 0					BUSPTR
				.BS 2					DRVPTR
				.DA 0					DCBPTR
				.DA 0					BUFPTR
FD.DEV.NAME		.AZ "lpt1"
*--------------------------------------
*			Driver Code
*--------------------------------------
PIC.WDATA		.EQ $C080
PIC.WSTROBE		.EQ $C082
PIC.RCTRL		.EQ $C083
PIC.RACK		.EQ $C084
PIC.STROBE500	.EQ $C085				pin 13 ????
PIC.IRQEN		.EQ $C086
PIC.IRQDIS		.EQ $C087				Reset ACK, DIS AutoStrobe
*--------------------------------------
ZPIOCTL			.EQ ZPDRV
ZPBufPtr		.EQ ZPDRV+2
ZPCount			.EQ ZPDRV+4
*--------------------------------------
DRV.CS.START	cld
				jmp (.1,x)
.1				.DA STATUS
				.DA A2osX.BADCALL
				.DA A2osX.BADCALL
				.DA A2osX.BADCALL
				.DA CONTROL
				.DA A2osX.BADCALL
				.DA OPEN
				.DA CLOSE
				.DA READ
				.DA WRITE
				.DA 0					end or relocation
*--------------------------------------
STATUS			jsr STATUS.CONTROL.Init
				ldy #S.IOCTL.S
				lda (ZPIOCTL),y
				beq .1
				cmp #S.IOCTL.S.GETDIB
				bne STATUS.DCB
				ldy #S.DIB-1
				.HS 2C					bit abs
.1				ldy #3

.2				lda DIB,y
				sta (ZPBufPtr),y
				dey
				bpl .2
				clc
				rts

STATUS.DCB		cmp #S.IOCTL.S.GETDCB
				bne .3

				ldy #S.DCB.COM-1
.2				lda DCB,y
				sta (ZPBufPtr),y
				dey
				bpl .2

				clc
				rts
.3				cmp #S.IOCTL.S.EOF
				bne STATUS.9

				lda DIB+S.DIB.S
				and #S.DIB.S.OPENED
				beq OPEN.E
				
.8				clc
				rts

STATUS.9		lda #MLI.E.BADCTL
				sec
				rts
*--------------------------------------
CONTROL			jsr STATUS.CONTROL.Init

				ldy #S.IOCTL.C
				lda (ZPIOCTL),y
				cmp #S.IOCTL.C.SETDCB
				bne STATUS.9
				ldy #S.DCB.COM-1
.2				lda (ZPBufPtr),y
				sta DCB,y
				dey
				bpl .2
*--------------------------------------
OPEN			lda DIB+S.DIB.S
				bit #S.DIB.S.OPENED
				beq OPEN.1
				
OPEN.E			lda #MLI.E.OPEN
				sec
				rts

OPEN.1			ldx DEVSLOTn0
				stz PIC.IRQDIS,x

				lda #S.DIB.S.OPENED
				tsb DIB+S.DIB.S

				clc
				rts
*--------------------------------------
CLOSE			lda #S.DIB.S.OPENED
				trb DIB+S.DIB.S
				
				clc
				rts
*--------------------------------------
READ			jsr READ.WRITE.Init

				clc
				rts
*--------------------------------------
WRITE			jsr READ.WRITE.Init

.1				inc ZPCount
				bne .2
				inc ZPCount+1
				beq .8

.2				lda (ZPBufPtr)
				inc ZPBufPtr
				bne .3

				inc ZPBufPtr+1

.3				sta PIC.WDATA,x
*				sta PIC.WSTROBE,x
				bra .1

.8				clc
				rts
*--------------------------------------
READ.WRITE.Init	ldx DEVSLOTn0

STATUS.CONTROL.Init
				>STYA ZPIOCTL

				ldy #S.IOCTL.BUFPTR
				lda (ZPIOCTL),y
				sta ZPBufPtr

				iny 

				lda (ZPIOCTL),y
				sta ZPBufPtr+1
				iny 					#S.IOCTL.BYTECNT

				lda (ZPIOCTL),y
				eor #$ff
				sta ZPCount

				iny

				lda (ZPIOCTL),y
				eor #$ff
				sta ZPCount+1
				rts
*--------------------------------------
DRV.CS.END
*DEVSLOT0n		.BS 1
*DEVSLOTCn		.BS 1
DEVSLOTn0		.BS 1
*--------------------------------------
DIB				.DA #S.DIB.S.WRITE+S.DIB.S.READ
				.DA #0,#0,#0
				.PS "Apple // Int Crd"
				.DA #S.DIB.T.CHAR
				.DA #0
				.DA K.VER
*--------------------------------------
DCB				.DA #S.DCB.T.COM
				.DA #0					FLAGS
				.DA 0
				.DA #0
				.DA #0
				.DA #0
				.DA #0
*--------------------------------------
DRV.END
MAN
SAVE usr/src/drv/pic.drv.s
ASM