A2osX/DRV/X.SSC.DRV.S.txt

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
				.OP	65C02
				.OR $2000
*--------------------------------------
				.DO SSCIRQ=1
				.TF DRV/SSC.I.DRV
				.ELSE
				.TF DRV/SSC.DRV
				.FIN
*--------------------------------------
				.DO SSCIRQ=1
BUF.SIZE		.EQ $40
BUF.MASK		.EQ $3F
				.FIN
*--------------------------------------
ZPArgPtr		.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 0
				.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 ZPArgPtr
				lda #$C1
				sta ZPArgPtr+1
				
.1				and #$0f
				tay
				lda A2osX.S,y
				bne .3

				ldx #DEVSIG.Length-1

.2				ldy DEVSIG.Offset,x
				lda (ZPArgPtr),y
				cmp DEVSIG.Value,x
				bne .3
				dex
				bpl .2
				bra .4
				
.3				inc FD.DEV.NAME+3
				inc ZPArgPtr+1			no match, try next slot....
				lda ZPArgPtr+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 ZPArgPtr+1
				and #$0F
				pha
				tay
				lda #A2osX.S.COM
				sta A2osX.S,y
				pla
				asl
				asl
				asl
				asl
				clc
				adc #$8F
				sta DEVSLOTn08F
				
				jsr Dev.ParseArgs
				bcs .9
				
.8				>PUSHW L.FD.DEV.NAME
				>PUSHBI 2
				>LDYA L.MSG.DETECT.OK
				>SYSCALL printf
				
				>PUSHWI DRV.END
				>PUSHWI DRV.CS.END
				>PUSHWI DRV.CS.START
				>LDYA L.DRV.CS.START
				>SYSCALL InsDrv
				bcs .9
				>STYA FD.DEV+S.FD.DEV.DRVPTR
				
				>LDYA L.FD.DEV
				>SYSCALL MKDEV

.9				rts
*--------------------------------------
Dev.ParseArgs	>LDYA ARGS
				>STYA ZPArgPTR
				lda (ZPArgPTR)
				beq .8
				
				
.8				clc
				rts
*--------------------------------------
CS.END
DEVSIG.Offset	.HS 05070B0C
DEVSIG.Value	.HS 38180131
DEVSIG.Length	.EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT		.DO SSCIRQ=1
				.AZ "Apple SSC (Super Serial Card,//c Serial Port) Driver (IRQ Enabled)."
				.ELSE
				.AZ "Apple SSC (Super Serial Card,//c Serial Port) Driver."				
				.FIN
MSG.DETECT.OK	.AZ "SSC Installed As Device : %s\r\n"
MSG.DETECT.KO	.AZ "No SSC 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
FD.DEV.NAME		.AZ "COM1"				NAME
				.HS 000000
*--------------------------------------
*			Driver Code
*--------------------------------------
ZPIOCTL			.EQ ZPDRV
*--------------------------------------
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
				.DO SSCIRQ=1
				.DA IRQ
				.ELSE
				.DA A2osX.BADCALL
				.FIN
				.DA 0					end or relocation
*--------------------------------------
STATUS			>STYA ZPIOCTL

				ldy #S.IOCTL.STATCODE
				lda (ZPIOCTL),y
				beq .1
				
				cmp #S.IOCTL.STATCODE.GETDIB
				bne STATUS.DCB
				
				ldx #S.DIB-1
				.HS 2C					bit abs
.1				ldx #3

				ldy #S.IOCTL.BUFPTR
				lda (ZPIOCTL),y
				sta .3+1
				iny
				lda (ZPIOCTL),y
				sta .3+2
				
.2				lda DIB,x
.3				sta $ffff,x				SELF MODIFIED
				dex
				bpl .2
				
				clc
				rts

STATUS.DCB		cmp #S.IOCTL.STATCODE.GETDCB
				bne STATUS.9

				ldy #S.IOCTL.BUFPTR
				lda (ZPIOCTL),y
				sta .3+1
				iny
				lda (ZPIOCTL),y
				sta .3+2
				
				ldx #S.DCB.COM-1
				
.2				lda DCB,x
.3				sta $ffff,x				SELF MODIFIED
				dex
				bpl .2

				clc
				rts
				
STATUS.9		lda #MLI.E.BADCTL
				sec
				rts				
*--------------------------------------
CONTROL			>STYA ZPIOCTL

				ldy #S.IOCTL.CTRLCODE
				lda (ZPIOCTL),y
				cmp #S.IOCTL.CTRLCODE.SETDCB
				bne STATUS.9
				
.1				ldy #S.IOCTL.BUFPTR
				lda (ZPIOCTL),y
				sta .2+1
				iny
				lda (ZPIOCTL),y
				sta .2+2
				
				ldx #S.DCB.COM-1
				
.2				lda $ffff,x				SELF MODIFIED
				sta DCB,x
				dex
				bpl .2
*--------------------------------------
OPEN			php
				sei
				ldx DEVSLOTn08F
				
				stz SSC.RESET-$8F,x 

				lda #SSC.CTL.CLKINT+SSC.CTL.B9600+SSC.CTL.8D+SSC.CTL.1S+SSC.CMD.NOP
				sta SSC.CTL-$8F,x
				
				.DO SSCIRQ=1
				
				lda #SSC.CMD.TEIRQ+SSC.CMD.TE+SSC.CMD.DTR
				sta SSC.CMD-$8F,x

				stz INBUF.HEAD
				stz INBUF.TAIL
				stz OUTBUF.HEAD
				stz OUTBUF.TAIL
			
				.ELSE
				
				lda #SSC.CMD.RIRQDIS+SSC.CMD.TE+SSC.CMD.DTR
				sta SSC.CMD-$8F,x
				
				.FIN

				lda SSC.DATA-$8F,x			discard any garbage byte
				lda SSC.STATUS-$8F,x		clear any IRQ pending

				plp
				clc
				rts
*--------------------------------------
CLOSE			php
				sei
				ldx DEVSLOTn08F
				stz SSC.RESET-$8F,x 
				plp
				clc
				rts
*--------------------------------------
READ			>STYA ZPIOCTL

				.DO SSCIRQ=1
				php
				sei
				ldx INBUF.TAIL
				cpx INBUF.HEAD
				beq .2
				
				lda INBUF,x
				inx
				cpx #BUF.SIZE
				bne .1
				
				ldx #0
				
.1				stx INBUF.TAIL
				
				plp
				clc
				rts
				
.2				ldx DEVSLOTn08F
				lda SSC.STATUS-$8F,x
				and #SSC.STATUS.nDSR	true when 0
				beq .90

				lda #C.EOF
				
.90				plp
				sec
				rts
				.ELSE
				ldx DEVSLOTn08F
				lda SSC.STATUS-$8F,x

				and #SSC.STATUS.RDRF	incoming char?
				beq	.9
				
				lda SSC.DATA-$8F,x
				clc
				rts
				
.9				lda #0
				sec
				rts
				.FIN
*--------------------------------------
WRITE			>STYA ZPIOCTL

				.DO SSCIRQ=1
				php
				sei
				tay						save char in Y

				ldx DEVSLOTn08F

				lda SSC.STATUS-$8F,x
				bit #SSC.STATUS.nDSR	true when 0
				bne .90
				
				lda OUTBUF.HEAD
				cmp OUTBUF.TAIL			Buffer Empty?
				bne .11					not empty, queue char

				lda SSC.STATUS-$8F,x
				
				and #SSC.STATUS.TDRE 	Register Empty ?
				beq .10					not empty, queue char
				
				tya						yes, write directly to ACIA
				sta SSC.DATA-$8F,x
				
				plp
				clc
				rts
	
.10				lda OUTBUF.HEAD
				
.11				tax
				inc
				and #BUF.MASK
				cmp OUTBUF.TAIL	
				beq .9					Buffer Full!!

				sta OUTBUF.HEAD
				
				tya
				sta OUTBUF,x
				
				plp
				clc
				rts

.90				lda #C.EOF
.9				plp
				sec
				rts
				.ELSE
				pha
				
				ldx DEVSLOTn08F
				
.1				lda SSC.STATUS-$8F,x

*				and #SSC.STATUS.DCD+SSC.STATUS.DSR
*				beq .9
				
				and #SSC.STATUS.TDRE	Outgoing char?
				beq .1
				
				pla
				sta SSC.DATA-$8F,x
				
				clc
				rts
				
.9				pla
				sec
				rts
				.FIN
*--------------------------------------
* IRQ Handler
* on exit, CC if handled
*--------------------------------------
				.DO SSCIRQ=1
IRQ				ldx DEVSLOTn08F
				lda SSC.STATUS-$8F,x
				
*				and #SSC.STATUS.IRQ		Useless
				bpl .9					IRQ from this device ? no, exit !!!!Applewin bug #308!!!!

				bit #SSC.STATUS.RDRF	incoming char?
				beq .2					

*------------ IRQ In

				pha
				
				lda INBUF.HEAD
				tay						save actual head for later
				
				inc
				and #BUF.MASK
				cmp INBUF.TAIL				
				beq .1					buffer full, discard and exit
				
				sta INBUF.HEAD

				lda SSC.DATA-$8F,x			read data to clear IRQ
				sta INBUF,y

.1				pla
				
*------------ IRQ Out
				
.2				bit #SSC.STATUS.TDRE
				beq .8					no transmition possible....

				ldy OUTBUF.TAIL			something to transmit ?
				cpy OUTBUF.HEAD
				beq .8					in that case, HOW TO CLEAR IRQ ????
				
				lda OUTBUF,y
				sta SSC.DATA-$8F,x			write data to clear IRQ
				
				tya
				inc
				and #BUF.MASK
				
				sta OUTBUF.TAIL	
				
.8				clc
				rts
				
.9				sec
				rts
				.FIN
*--------------------------------------
DRV.CS.END
DEVSLOTn08F		.BS 1
				.DO SSCIRQ=1
INBUF.TAIL		.BS 1
INBUF.HEAD		.BS 1
OUTBUF.TAIL		.BS 1
OUTBUF.HEAD		.BS 1
INBUF			.BS BUF.SIZE
OUTBUF			.BS BUF.SIZE
				.FIN
*--------------------------------------
DIB				.DO SSCIRQ=1
				.DA #S.DIB.S.WRITE+S.DIB.S.READ+S.DIB.S.IRQ
				.ELSE
				.DA #S.DIB.S.WRITE+S.DIB.S.READ
				.FIN
				.DA #0,#0,#0
				>PSTR "Serial Card/Port"
				.DA #S.DIB.T.CHAR
				.DA #0
				.DA K.VER
*--------------------------------------
DCB				.DA #S.DCB.T.COM
				.DA #0					FLAGS
				.DA >9600				BAUD (DWORD)
				.DA #8					DATA
				.DA #1					STOP
				.DA #S.DCB.COM.P.NONE	PARITY
				.DA #S.DCB.COM.C.XONXOFF
*--------------------------------------
DRV.END
MAN
SAVE /A2OSX.SRC/DRV/X.SSC.DRV.S
LOAD /A2OSX.SRC/DRV/SSC.I.DRV.S
ASM