NEW
  AUTO 3,1
				.LIST OFF
				.OP	65C02
				.OR $2000
				.TF drv/pppssc.drv
*--------------------------------------
				.INB inc/macros.i
				.INB inc/a2osx.i
				.INB inc/mli.e.i
				.INB inc/com.i
				.INB inc/com.6551.i
				.INB inc/nic.i
*--------------------------------------
INBUF.SIZE		.EQ $800
*--------------------------------------
				.DUMMY
				.OR ZPBIN
ZS.START
ZPArgsPtr		.BS 2
ZPPtr1			.BS 2
ZPPtr2			.BS 2
ZPBufLen		.BS 2
ZPIOCTL			.BS 2
ZPBufPtr		.BS 2
ZPCount			.BS 2
ZPCount2		.BS 2
FCS				.BS 2
Len				.BS 1
hETCFILE		.BS 1

ZS.END			.ED
*--------------------------------------
*			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
L.ETCFILE		.DA ETCFILE
L.MSG.ETCFILE	.DA MSG.ETCFILE
L.MSG.UNEXPECTED	.DA MSG.UNEXPECTED
L.MSG.SYNTAX	.DA MSG.SYNTAX
L.MSG.DUMPBUF	.DA MSG.DUMPBUFS
				.DA MSG.DUMPBUFR
L.MSG.HEXDUMP	.DA MSG.HEXDUMP
L.PPP.LCPReq	.DA PPP.LCPReq
L.PPP.IPCPReq	.DA PPP.IPCPReq
L.FILE.Buf		.DA FILE.Buf
L.FILE.Bufp1	.DA FILE.Buf+1
L.RCV.Buf		.DA RCV.Buf
L.RCV.Bufp1		.DA RCV.Buf+1
L.RCV.Bufp2		.DA RCV.Buf+2
				.DA 0					End Of Reloc Table
*--------------------------------------
Dev.Detect		>STYA ZPArgsPtr

				>LDYA L.MSG.DETECT
				>SYSCALL PutS
				stz ZPPtr1

				lda #$C1
				sta ZPPtr1+1

.1				and #$0f
				tay
				lda A2osX.S,y
				bne .3

				ldx #DEVSIG.Length-1

.2				ldy DEVSIG.Offset,x
				lda (ZPPtr1),y
				cmp DEVSIG.Value,x
				bne .3

				dex
				bpl .2

				bra .4

.3				inc FD.DEV.NAME+3
				inc ZPPtr1+1			no match, try next slot....
				lda ZPPtr1+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 ZPPtr1+1
				asl
				asl
				asl
				asl
				clc
				adc #$8F
				sta DEVSLOTn08F

				jsr SSC.Init
				jsr PPP.ETCFILE
				bcs .99

				jsr PPP.Init
				bcs .99

				>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
.99				bcs .9

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

				>PUSHW L.FD.DEV
				>PUSHW L.FD.DEV.NAME
				>SYSCALL MKDev
				bcs .9

				lda FD.DEV.NAME+3
				and #$0F
				tax
				lda #A2osX.S.NIC
				sta A2osX.S,x

				lda #0
				sec
				rts
				
.9				ldx DEVSLOTn08F
				stz SSC.RESET-$8F,x

Dev.Detect.RTS	rts
*--------------------------------------
PPP.ETCFILE		>PUSHW L.ETCFILE
				>PUSHBI	O.RDONLY
				>PUSHBI 0
				>PUSHWZ
				>SYSCALL FOpen
				bcs Dev.Detect.RTS

				sta hETCFILE

				>PUSHW L.MSG.ETCFILE
				>PUSHW L.ETCFILE
				>PUSHBI 2
				>SYSCALL PrintF

.1				>PUSHB hETCFILE
				>PUSHW L.FILE.Buf
				>PUSHWI 255
				>SYSCALL FGetS
				bcs .8
				
				lda FILE.Buf
				beq .1
				
				cmp #'#'
				beq .1
				
				>LDYA L.FILE.Buf
				>SYSCALL PutS
				
				lda FILE.Buf
				cmp #'>'
				bne .2

				>LDYA L.FILE.Bufp1
				jsr SSC.WriteYA
				bcs .9

.10				bra .1

.2				cmp #'?'
				bne .7
*--------------------------------------
.3				jsr SSC.Read
				bcs .9

				tya
				beq .3

				lda #0
				sta RCV.Buf,y

				>LDYA L.RCV.Buf
				>STYA ZPPtr2

.4				jsr PPP.SkipCRLFPtr2
				bcs .3
				
				ldy #$ff

.5				iny
				lda FILE.Buf+1,y		skip !
				beq .10
				
.6				cmp (ZPPtr2),y
				beq .5
				
				lda (ZPPtr2),y
				beq .60
				
				cmp #C.CR
				beq .60
				
				jsr PPP.ETCFILE.ERR1
				bra .9
				
.60				jsr PPP.NextStrPtr2
				lda (ZPPtr2)
				bne .4
				
.7				jsr PPP.ETCFILE.ERR2
				bra .9

.8				cmp #MLI.E.EOF
				sec
				bne .9

				lda #0
				clc

.9				php
				pha
				lda hETCFILE
				>SYSCALL FClose
				pla
				plp

				rts
*--------------------------------------
PPP.SkipCRLFPtr2
.1				lda (ZPPtr2)
				beq .9
				
				cmp #C.CR
				bne .8
				
				ldy #1
				lda (ZPPtr2),y
				beq .9
				
				cmp #C.LF
				bne .2
				
				iny
				
.2				tya
				clc
				adc ZPPtr2
				sta ZPPtr2
				bcc .1
				
				inc ZPPtr2+1
				bra .1
				
.8				clc
				rts
				
.9				sec
				rts
*--------------------------------------
PPP.NextStrPtr2	ldy #$ff

.1				iny
				lda (ZPPtr2),y
				beq .2
				
				cmp #C.CR
				bne .1
				
.2				tya
				clc
				adc ZPPtr2
				sta ZPPtr2
				bcc .8
				
				inc ZPPtr2+1
				
.8				rts				
*--------------------------------------
PPP.ETCFILE.ERR1
				>PUSHW L.MSG.UNEXPECTED
				>PUSHW L.RCV.Buf
				>PUSHBI 2
				>SYSCALL PrintF
				lda #MLI.E.IO
				sec
				rts
*--------------------------------------
PPP.ETCFILE.ERR2
				>PUSHW L.MSG.SYNTAX
				>PUSHW L.FILE.Buf
				>PUSHBI 2
				>SYSCALL PrintF
				lda #MLI.E.IO
				sec
				rts
*--------------------------------------
PPP.Init		>LDYAI PPP.LCPReq.LEN
				>STYA ZPBufLen
				>LDYA L.PPP.LCPReq
				jsr PPPFCS16

				>LDYA L.PPP.LCPReq
				ldx #0
				jsr DumpBuf

				>LDYA L.PPP.LCPReq
				ldx #PPP.LCPReq.LEN

				jsr SSC.WriteYAX
				bcs .9

.1				jsr SSC.Read
				bcs .9

				tya
				beq .1

				sty ZPBufLen
				stz ZPBufLen+1

				>LDYA L.RCV.Buf
				ldx #2
				jsr DumpBuf

				>LDYAI PPP.IPCPReq.LEN
				>STYA ZPBufLen
				>LDYA L.PPP.IPCPReq
				jsr PPPFCS16

				>LDYA L.PPP.IPCPReq
				ldx #0
				jsr DumpBuf

				>LDYA L.PPP.IPCPReq
				ldx #PPP.IPCPReq.LEN

				jsr SSC.WriteYAX
				bcs .9

.2				jsr SSC.Read
				bcs .9

				tya
				beq .2

				sty ZPBufLen
				stz ZPBufLen+1

				>LDYA L.RCV.Buf
				ldx #2
				jsr DumpBuf

				sec

*				clc
.9				rts
*--------------------------------------
SSC.Init		ldx DEVSLOTn08F
				stz SSC.RESET-$8F,x

				lda #SSC.CTL.1S+SSC.CTL.8D+SSC.CTL.CLKINT+SSC.CTL.B115200
				sta SSC.CTL-$8F,x
				lda #SSC.CMD.NOP+SSC.CMD.TE+SSC.CMD.RIRQDIS+SSC.CMD.DTR
				sta SSC.CMD-$8F,x

				lda SSC.DATA-$8F,x			discard any garbage byte
				lda SSC.STATUS-$8F,x		clear any IRQ pending
				rts
*--------------------------------------
SSC.WriteYA		>STYA ZPPtr1

				ldy #$ff

.1				iny
				lda (ZPPtr1),y
				bne .1

				lda #C.CR
				sta (ZPPtr1),y
				iny

				lda #C.LF
				sta (ZPPtr1),y
				iny

				sty Len

				bra SSC.Write

SSC.WriteYAX	>STYA ZPPtr1
				stx Len

SSC.Write		php
				sei

				ldx DEVSLOTn08F

				ldy #0

.1				phy

				ldy #0

.2				lda SSC.STATUS-$8F,x
				bit #SSC.STATUS.nDCD	true when 0
				bne .9

				bit #SSC.STATUS.TDRE 	Register Empty ?
				bne .3

				iny
				bne .2

.9				pla
				lda	#MLI.E.IO
				plp
				sec
				rts

.3				ply

				lda (ZPPtr1),y
				pha
				and #$7F
				cmp #C.XON
				beq .4

				cmp #C.XOFF
				bne .6

.4				lda #$7D
				sta SSC.DATA-$8F,x

.5				lda SSC.STATUS-$8F,x
				bit #SSC.STATUS.TDRE
				beq .5

				pla
				ora #$20
				.HS F0					BEQ

.6				pla

				sta SSC.DATA-$8F,x
				iny
				cpy Len
				bne .1



				plp
				clc
				rts
*--------------------------------------
SSC.Read		php
				sei

				ldx DEVSLOTn08F

				ldy #0

.1				phy

				ldy #0

.2				lda SSC.STATUS-$8F,x
				bit #SSC.STATUS.nDCD	true when 0
				bne .9

				bit #SSC.STATUS.RDRF	incoming char?
				bne .3

				iny
				bne .2

				ply

				plp
				clc
				rts

.3				ply

				lda SSC.DATA-$8F,x
				sta RCV.Buf,y
				iny

				bra .1

.9				lda	#MLI.E.IO
				plp
				sec
				rts
*--------------------------------------
DumpBuf			>STYA ZPPtr1

				>PUSHW L.MSG.DUMPBUF,x
				>PUSHW ZPBufLen
				>PUSHBI 2
				>SYSCALL PrintF
				bcs .9

				lda (ZPPtr1)
				cmp #$0D
				bne DumpBuf.PPP

				lda ZPBufLen
				eor #$ff
				sta ZPBufLen
				lda ZPBufLen+1
				eor #$ff
				sta ZPBufLen+1

.1				inc ZPBufLen
				bne .2
				
				inc ZPBufLen+1
				beq .9
				
.2				lda (ZPPtr1)
				inc ZPPtr1
				bne .3
				
				inc ZPPtr1+1
				
.3				cmp #$0D
				beq .4
				
				cmp #$0A
				beq .4
				
				cmp #C.SPACE
				bcs .4

				ora #$20
				
.4				>SYSCALL PutChar
				bcc .1
				
.9				rts
				
DumpBuf.PPP		stz ZPPtr2
				stz ZPPtr2+1
				
.1				>PUSHW L.MSG.HEXDUMP
				>PUSHW ZPPtr2

				ldy #0

.2				>PUSHB (ZPPtr1),y
				iny
				cpy #8
				bne .2

				>PUSHBI 10
				>SYSCALL PrintF
				bcs .9

				lda ZPPtr1
				adc #8
				sta ZPPtr1
				lda ZPPtr1+1
				adc #0
				sta ZPPtr1+1

				lda ZPPtr2
				adc #8
				sta ZPPtr2
				lda ZPPtr2+1
				adc #0
				sta ZPPtr2+1

				lda ZPBufLen
				sec
				sbc #8
				sta ZPBufLen
				lda ZPBufLen+1
				sbc #0
				sta ZPBufLen+1
				bcc .9

				ora ZPBufLen
				bne .1

				clc

.9				rts
*--------------------------------------
PPPFCS16		>STYA ZPPtr1

				lda #$ff
				sta FCS
				sta FCS+1

				lda ZPBufLen
				sec
				sbc #4					minus 7E .... FCS FCS 7E
				eor #$ff
				sta ZPPtr2

				lda ZPBufLen+1
				sbc #0
				eor #$ff
				sta ZPPtr2+1

.1				inc ZPPtr2
				bne .2

				inc ZPPtr2+1
				beq .8

.2				inc ZPPtr1				skip First 7E
				bne .3

				inc ZPPtr1+1

.3				lda (ZPPtr1)
				eor FCS
				tax

				lda FCS.LO,x
				eor FCS+1
				sta FCS

				lda FCS.HI,x
				sta FCS+1

				bra .1

.8				lda FCS+1
				eor #$ff
				ldy #1
				sta (ZPPtr1),y

				lda FCS
				eor #$ff
				iny
				sta (ZPPtr1),y

				rts
*--------------------------------------
CS.END
FCS.LO			.DA #$0000,#$1189,#$2312,#$329b,#$4624,#$57ad,#$6536,#$74bf
				.DA #$8c48,#$9dc1,#$af5a,#$bed3,#$ca6c,#$dbe5,#$e97e,#$f8f7
				.DA #$1081,#$0108,#$3393,#$221a,#$56a5,#$472c,#$75b7,#$643e
				.DA #$9cc9,#$8d40,#$bfdb,#$ae52,#$daed,#$cb64,#$f9ff,#$e876
				.DA #$2102,#$308b,#$0210,#$1399,#$6726,#$76af,#$4434,#$55bd
				.DA #$ad4a,#$bcc3,#$8e58,#$9fd1,#$eb6e,#$fae7,#$c87c,#$d9f5
				.DA #$3183,#$200a,#$1291,#$0318,#$77a7,#$662e,#$54b5,#$453c
				.DA #$bdcb,#$ac42,#$9ed9,#$8f50,#$fbef,#$ea66,#$d8fd,#$c974
				.DA #$4204,#$538d,#$6116,#$709f,#$0420,#$15a9,#$2732,#$36bb
				.DA #$ce4c,#$dfc5,#$ed5e,#$fcd7,#$8868,#$99e1,#$ab7a,#$baf3
				.DA #$5285,#$430c,#$7197,#$601e,#$14a1,#$0528,#$37b3,#$263a
				.DA #$decd,#$cf44,#$fddf,#$ec56,#$98e9,#$8960,#$bbfb,#$aa72
				.DA #$6306,#$728f,#$4014,#$519d,#$2522,#$34ab,#$0630,#$17b9
				.DA #$ef4e,#$fec7,#$cc5c,#$ddd5,#$a96a,#$b8e3,#$8a78,#$9bf1
				.DA #$7387,#$620e,#$5095,#$411c,#$35a3,#$242a,#$16b1,#$0738
				.DA #$ffcf,#$ee46,#$dcdd,#$cd54,#$b9eb,#$a862,#$9af9,#$8b70
				.DA #$8408,#$9581,#$a71a,#$b693,#$c22c,#$d3a5,#$e13e,#$f0b7
				.DA #$0840,#$19c9,#$2b52,#$3adb,#$4e64,#$5fed,#$6d76,#$7cff
				.DA #$9489,#$8500,#$b79b,#$a612,#$d2ad,#$c324,#$f1bf,#$e036
				.DA #$18c1,#$0948,#$3bd3,#$2a5a,#$5ee5,#$4f6c,#$7df7,#$6c7e
				.DA #$a50a,#$b483,#$8618,#$9791,#$e32e,#$f2a7,#$c03c,#$d1b5
				.DA #$2942,#$38cb,#$0a50,#$1bd9,#$6f66,#$7eef,#$4c74,#$5dfd
				.DA #$b58b,#$a402,#$9699,#$8710,#$f3af,#$e226,#$d0bd,#$c134
				.DA #$39c3,#$284a,#$1ad1,#$0b58,#$7fe7,#$6e6e,#$5cf5,#$4d7c
				.DA #$c60c,#$d785,#$e51e,#$f497,#$8028,#$91a1,#$a33a,#$b2b3
				.DA #$4a44,#$5bcd,#$6956,#$78df,#$0c60,#$1de9,#$2f72,#$3efb
				.DA #$d68d,#$c704,#$f59f,#$e416,#$90a9,#$8120,#$b3bb,#$a232
				.DA #$5ac5,#$4b4c,#$79d7,#$685e,#$1ce1,#$0d68,#$3ff3,#$2e7a
				.DA #$e70e,#$f687,#$c41c,#$d595,#$a12a,#$b0a3,#$8238,#$93b1
				.DA #$6b46,#$7acf,#$4854,#$59dd,#$2d62,#$3ceb,#$0e70,#$1ff9
				.DA #$f78f,#$e606,#$d49d,#$c514,#$b1ab,#$a022,#$92b9,#$8330
				.DA #$7bc7,#$6a4e,#$58d5,#$495c,#$3de3,#$2c6a,#$1ef1,#$0f78
*--------------------------------------
FCS.HI			.DA /$0000,/$1189,/$2312,/$329b,/$4624,/$57ad,/$6536,/$74bf
				.DA /$8c48,/$9dc1,/$af5a,/$bed3,/$ca6c,/$dbe5,/$e97e,/$f8f7
				.DA /$1081,/$0108,/$3393,/$221a,/$56a5,/$472c,/$75b7,/$643e
				.DA /$9cc9,/$8d40,/$bfdb,/$ae52,/$daed,/$cb64,/$f9ff,/$e876
				.DA /$2102,/$308b,/$0210,/$1399,/$6726,/$76af,/$4434,/$55bd
				.DA /$ad4a,/$bcc3,/$8e58,/$9fd1,/$eb6e,/$fae7,/$c87c,/$d9f5
				.DA /$3183,/$200a,/$1291,/$0318,/$77a7,/$662e,/$54b5,/$453c
				.DA /$bdcb,/$ac42,/$9ed9,/$8f50,/$fbef,/$ea66,/$d8fd,/$c974
				.DA /$4204,/$538d,/$6116,/$709f,/$0420,/$15a9,/$2732,/$36bb
				.DA /$ce4c,/$dfc5,/$ed5e,/$fcd7,/$8868,/$99e1,/$ab7a,/$baf3
				.DA /$5285,/$430c,/$7197,/$601e,/$14a1,/$0528,/$37b3,/$263a
				.DA /$decd,/$cf44,/$fddf,/$ec56,/$98e9,/$8960,/$bbfb,/$aa72
				.DA /$6306,/$728f,/$4014,/$519d,/$2522,/$34ab,/$0630,/$17b9
				.DA /$ef4e,/$fec7,/$cc5c,/$ddd5,/$a96a,/$b8e3,/$8a78,/$9bf1
				.DA /$7387,/$620e,/$5095,/$411c,/$35a3,/$242a,/$16b1,/$0738
				.DA /$ffcf,/$ee46,/$dcdd,/$cd54,/$b9eb,/$a862,/$9af9,/$8b70
				.DA /$8408,/$9581,/$a71a,/$b693,/$c22c,/$d3a5,/$e13e,/$f0b7
				.DA /$0840,/$19c9,/$2b52,/$3adb,/$4e64,/$5fed,/$6d76,/$7cff
				.DA /$9489,/$8500,/$b79b,/$a612,/$d2ad,/$c324,/$f1bf,/$e036
				.DA /$18c1,/$0948,/$3bd3,/$2a5a,/$5ee5,/$4f6c,/$7df7,/$6c7e
				.DA /$a50a,/$b483,/$8618,/$9791,/$e32e,/$f2a7,/$c03c,/$d1b5
				.DA /$2942,/$38cb,/$0a50,/$1bd9,/$6f66,/$7eef,/$4c74,/$5dfd
				.DA /$b58b,/$a402,/$9699,/$8710,/$f3af,/$e226,/$d0bd,/$c134
				.DA /$39c3,/$284a,/$1ad1,/$0b58,/$7fe7,/$6e6e,/$5cf5,/$4d7c
				.DA /$c60c,/$d785,/$e51e,/$f497,/$8028,/$91a1,/$a33a,/$b2b3
				.DA /$4a44,/$5bcd,/$6956,/$78df,/$0c60,/$1de9,/$2f72,/$3efb
				.DA /$d68d,/$c704,/$f59f,/$e416,/$90a9,/$8120,/$b3bb,/$a232
				.DA /$5ac5,/$4b4c,/$79d7,/$685e,/$1ce1,/$0d68,/$3ff3,/$2e7a
				.DA /$e70e,/$f687,/$c41c,/$d595,/$a12a,/$b0a3,/$8238,/$93b1
				.DA /$6b46,/$7acf,/$4854,/$59dd,/$2d62,/$3ceb,/$0e70,/$1ff9
				.DA /$f78f,/$e606,/$d49d,/$c514,/$b1ab,/$a022,/$92b9,/$8330
				.DA /$7bc7,/$6a4e,/$58d5,/$495c,/$3de3,/$2c6a,/$1ef1,/$0f78
*--------------------------------------
DEVSIG.Offset	.HS 05070B0C
DEVSIG.Value	.HS 38180131
DEVSIG.Length	.EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT		.AZ "PPP Driver For Apple SSC."
MSG.DETECT.OK	.AZ "PPP Installed As Device : %s\r\n"
MSG.DETECT.KO	.AZ "No SSC Found."
ETCFILE			.AZ "${ROOT}etc/ppp.conf"
*--------------------------------------
MSG.ETCFILE		.AZ "Executing %s File...\r\n"
MSG.UNEXPECTED	.AZ "\r\nERR:Unexpected reply From Modem\r\n{%s}\r\n"
MSG.SYNTAX		.AZ "\r\nERR:Bad Syntax In ppp.conf\r\n{%s}\r\n"
MSG.DUMPBUFS	.AZ "Send:%H\r\n"
MSG.DUMPBUFR	.AZ "Recv:%H\r\n"
MSG.HEXDUMP		.AZ "%H:%h %h %h %h %h %h %h %h\r\n"
*--------------------------------------
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 "eth1"
*--------------------------------------
PPP.LCPReq		.HS 7E
PPP.LCPReq.START
				.HS FF03
				.HS C021				LCP
PPP.LCPReq.DATA	.HS 01					Configure-Request
				.HS 01					ID
				.DA /PPP.LCPReq.DATA.LEN,#PPP.LCPReq.DATA.LEN
				.HS 01.04				MRU
				.DA /576,#576
				.HS 02.06.000A0000		ACCM
				.HS 05.06.002A2B78		MAGIC
*				.HS 07.02
*				.HS 08.02
PPP.LCPReq.DATA.LEN	.EQ *-PPP.LCPReq.DATA
*				.HS	0000				PADDING
			.BS 2						FCS
				.HS 7E
PPP.LCPReq.LEN		.EQ *-PPP.LCPReq
*--------------------------------------
PPP.IPCPReq		.HS 7E
PPP.IPCPReq.START
				.HS FF03
				.HS 8021				IPCP
PPP.IPCPReq.DATA	.HS 01					Configure-Request
				.HS 01					ID
				.DA /PPP.IPCPReq.DATA.LEN,#PPP.IPCPReq.DATA.LEN
				.HS 03.06.00.00.00.00	IP Address
PPP.IPCPReq.DATA.LEN	.EQ *-PPP.IPCPReq.DATA
*				.HS	0000				PADDING
			.BS 2						FCS
				.HS 7E
PPP.IPCPReq.LEN		.EQ *-PPP.IPCPReq
*--------------------------------------
FILE.Buf		.BS 256
RCV.Buf			.BS 256
*--------------------------------------
*			Driver Code
*--------------------------------------
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 IRQ
				.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

				lda INBUF.TAIL
				eor INBUF.HEAD
				bne .8					NO DATA? eof = TRUE

				lda INBUF.TAIL+1
				eor INBUF.HEAD+1
				bne .8

				lda #1
				clc
				rts

.8				lda #0
				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			>LDYAI INBUF.SIZE
				>SYSCALL2 GetMem
				bcs .9

				stx hINBUF
				>STYA INBUF.PTR
				>STYA READ.BUF+1
				>STYA IRQ.BUF+1

				stz INBUF.TAIL
				stz INBUF.TAIL+1
				stz INBUF.HEAD
				stz INBUF.HEAD+1
				stz INBUF.CNT
				stz INBUF.CNT+1

				php
				sei
				ldx DEVSLOTn08F
				stz SSC.RESET-$8F,x

				lda #SSC.CTL.CLKINT+SSC.CTL.B115200+SSC.CTL.8D+SSC.CTL.1S+SSC.CMD.NOP
				sta SSC.CTL-$8F,x
				lda #SSC.CMD.TE+SSC.CMD.DTR
				sta SSC.CMD-$8F,x

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

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

				plp
				clc
.9				rts
*--------------------------------------
CLOSE			php
				sei
				ldx DEVSLOTn08F
				stz SSC.RESET-$8F,x

				lda #S.DIB.S.OPENED
				trb DIB+S.DIB.S

				lda hINBUF
				>SYSCALL2 FreeMem

				plp
				clc
				rts
*--------------------------------------
READ			php
				sei
				jsr READ.WRITE.Init

				lda INBUF.CNT
				ora INBUF.CNT+1
				beq READ.9

				stz ZPCount2
				stz ZPCount2+1

				ldy INBUF.TAIL

READ.1			inc ZPCount
				bne READ.BUF

				inc ZPCount+1
				beq READ.8

READ.BUF		lda $FFFF,y				SELF MODIFIED
				sta (ZPBufPtr)
				inc ZPBufPtr
				bne .1

				inc ZPBufPtr+1

.1				inc ZPCount2
				bne .2

				inc ZPCount2+1

.2				iny
				bne .3

				inc READ.BUF+2

				inc INBUF.TAIL+1
				lda INBUF.TAIL+1
				cmp /INBUF.SIZE
				bne .3

				lda INBUF.PTR+1
				sta READ.BUF+2

.3				lda INBUF.CNT
				ldx INBUF.CNT+1
				clc
				sbc #0
				bcs .4
				dex
				bmi .8

				stx INBUF.CNT+1

.4				sta INBUF.CNT
				bra READ.1

.8				sty INBUF.TAIL

READ.8			lda ZPCount2
				ldy #S.IOCTL.BYTECNT
				sta (ZPIOCTL),y
				iny
				lda ZPCount2+1
				sta (ZPIOCTL),y

				plp
				clc
				rts

READ.9			lda SSC.STATUS-$8F,x
				bit #SSC.STATUS.nDCD	true when 0
				beq .99

				lda #MLI.E.IO
				.HS 2C					BIT ABS

.99				lda	#E.NODATA
				plp
				sec
				rts
*--------------------------------------
WRITE			php
				sei
				jsr READ.WRITE.Init

				lda SSC.STATUS-$8F,x
				bit #SSC.STATUS.nDCD	true when 0
				bne .9

				ldy #0

.1				inc ZPCount
				bne .2

				inc ZPCount+1
				beq .8

.2				lda SSC.STATUS-$8F,x
				and #SSC.STATUS.TDRE 	Register Empty ?
				beq .2

				lda (ZPBufPtr),y
				sta SSC.DATA-$8F,x
				iny
				bne .1

				inc ZPBufPtr+1
				bra .1

.8				plp
				clc
				rts

.9				lda	#MLI.E.IO
				plp
				sec
				rts
*--------------------------------------
READ.WRITE.Init	ldx DEVSLOTn08F

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
*--------------------------------------
* IRQ Handler
* on exit, CC if handled
*--------------------------------------
IRQ				ldx DEVSLOTn08F
				lda SSC.STATUS-$8F,x
*				and #SSC.STATUS.IRQ
				bpl IRQ.9				IRQ from this device ? no, exit !!!!Applewin bug #308!!!!

				bit #SSC.STATUS.RDRF	incoming char?
				beq IRQ.8

				ldy INBUF.HEAD

IRQ.1			lda SSC.DATA-$8F,x		read data to clear IRQ
IRQ.BUF			sta $FFFF,y				SELF MODIFIED

				inc INBUF.CNT
				bne .1

				inc INBUF.CNT+1

.1				iny
				bne .2

				inc IRQ.BUF+2

				inc INBUF.HEAD+1
				lda INBUF.HEAD+1
				cmp /INBUF.SIZE
				bne .2

				lda INBUF.PTR+1
				sta IRQ.BUF+2

				lda #0

.2				bit SSC.STATUS-$8F,x
				bmi IRQ.1

				inc
				bne .2

				sty INBUF.HEAD

IRQ.8			clc
				rts

IRQ.9			sec
				rts
*--------------------------------------
DRV.CS.END
*--------------------------------------
DEVSLOTn08F		.BS 1
hINBUF			.BS 1
INBUF.PTR		.BS 2
INBUF.TAIL		.BS 2
INBUF.HEAD		.BS 2
INBUF.CNT		.BS 2
*--------------------------------------
DIB				.DA #S.DIB.S.IRQ
				.DA #0,#0,#0			size
				>PSTR "SSC/PPP Driver  "
				.DA #S.DIB.T.NIC
				.DA #0
				.DA K.VER
*--------------------------------------
DCB				.DA #S.DCB.T.NIC
				.DA #S.DCB.NIC.FLAGS.ARPOFFLOAD
				.DA #S.DCB.NIC.LINK.OK+S.DCB.NIC.LINK.FD
				.DA #S.DCB.NIC.SPEED.10
				.HS 000000000000		MAC
				.BS 12					IP/MASK/GW
*--------------------------------------
DRV.END
MAN
SAVE usr/src/drv/pppssc.drv.s
ASM