PR#3
PREFIX /A2OSX.BUILD
LOMEM $A00
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF /A2OSX.BUILD/DRV/UTHERNET.DRV
*--------------------------------------
				.INB /A2OSX.BUILD/INC/MACROS.I
				.INB /A2OSX.BUILD/INC/A2OSX.I
				.INB /A2OSX.BUILD/INC/MLI.ERR.I
				.INB /A2OSX.BUILD/INC/NET.I
				.INB /A2OSX.BUILD/INC/NET.8900A.I
				.INB /A2OSX.BUILD/INC/LIBTCPIP.I
*--------------------------------------
ZPTmpPTR		.EQ ZPDRV
Size			.EQ ZPDRV+2
Counter			.EQ ZPDRV+4
*--------------------------------------
*			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		>STYA ARGS
				>LDYA L.MSG.DETECT
				>SYSCALL PrintF.YA
				
				ldx #$70
				ldy #7
				
.1				lda A2osX.S,y		IO based detection, avoid scanning in Disk Controller IO!!!!
				bne .2
				
				lda /PP.ID
				sta PacketPagePTR+1,x
				lda #PP.ID
				sta PacketPagePTR,x

				lda PacketPageDATA+1,x
				cmp	/DEVID
				bne	.2
				
				lda PacketPageDATA,x
				cmp	#DEVID
				beq	.3
				
.2				dec DEV.HEADER.NAME+3
				txa
				sec
				sbc #$10
				tax
				dey
				bne .1
				
				>LDYA L.MSG.DETECT.KO
				>SYSCALL PrintF.YA

				lda #MLI.E.NODEV
				sec
				rts
				
.3				stx DEVSLOTx0
				lda #A2osX.S.NIC
				sta A2osX.S,y
				
				lda /PP.REVISION		Get Revision# of ths chip...
				sta PacketPagePTR+1,x
				lda #PP.REVISION
				sta PacketPagePTR,x
				
				lda PacketPageDATA+1,x
				sta DEVSTAT+S.DSTAT.VERSION+1	set Hardware version
				lda PacketPageDATA,x
				sta DEVSTAT+S.DSTAT.VERSION
				
				>LDYA ARGS
				>STYA ZPTmpPTR
				lda (ZPTmpPTR)
				bne .4
				
				lda #$00
				sta MAC
				lda #$0E
				sta MAC+1
				lda #$3A
				sta MAC+2
				lda A2osX.RANDOM16
				eor A2osX.TIMER16
				sta MAC+3
				eor A2osX.RANDOM16+1
				sta MAC+4
				eor A2osX.TIMER16+1
				sta MAC+5
				bra .8
				
.4				jsr DecodeMac
				bcc .8
				lda #K.E.SYN
				sec
				rts
				
.8				>PUSHW L.DEV.HEADER.NAME
				>LDYA L.MSG.DETECT.OK
				>SYSCALL PrintF.YA
				clc
				rts
*--------------------------------------
				.INB /A2OSX.SRC/DRV/X.NET.DRV.S
*--------------------------------------
CS.END
MSG.DETECT		>CSTR "UtherNet/CS8900A Driver.\r\n"
MSG.DETECT.OK	>CSTR "UtherNet/CS8900A Installed As Device : %s\r\n"
MSG.DETECT.KO	>CSTR "Hardware Not Found.\r\n"
ARGS			.BS 2
*--------------------------------------
*			Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER		cld
				jmp (DRV.CS.START,x)
				.DA #0
				.BS 6
DEV.HEADER.NAME	>CSTR "ETH7"			NAME
*--------------------------------------
*			Driver Code
*--------------------------------------
DRV.CS.START	.DA STATUS
				.DA READBLOCK
				.DA WRITEBLOCK
				.DA A2osX.BADCALL
				.DA A2osX.BADCALL
				.DA A2osX.BADCALL
				.DA OPEN
				.DA CLOSE
				.DA A2osX.BADCALL
				.DA A2osX.BADCALL
L.DEVSTAT		.DA DEVSTAT
				.DA 0					end or relocation
*--------------------------------------
STATUS			lda #S.DSTAT.NET.STATUS.10
				sta LINK.STATUS

				ldx DEVSLOTx0
				
				lda /PP.LineST
				sta PacketPagePTR+1,x
				lda #PP.LineST
				sta PacketPagePTR,x

				lda PacketPageDATA+1,x
				lda PacketPageDATA,x
				and #PP.LineST.LinkOK
				beq .1
				
				lda LINK.STATUS
				ora #S.DSTAT.NET.STATUS.OK
				sta LINK.STATUS
	
.1				lda /PP.TestCTL
				sta PacketPagePTR+1,x
				lda #PP.TestCTL
				sta PacketPagePTR,x
				
				lda PacketPageDATA+1,x
				ldy PacketPageDATA,x
				and /PP.TestCTL.FDX
				beq .2
				
				lda LINK.STATUS
				ora #S.DSTAT.NET.STATUS.FD
				sta LINK.STATUS
				
.2				>LDYA L.DEVSTAT
				clc
				rts
*--------------------------------------
READBLOCK		php
				sei

				ldx DEVSLOTx0
				
				lda /PP.RxEvent
				sta PacketPagePTR+1,x
				lda #PP.RxEvent
				sta PacketPagePTR,x

				lda PacketPageDATA+1,x
				ldy PacketPageDATA,x
				and /PP.RxEvent.RxOK+PP.RxEvent.IA+PP.RxEvent.Brdcast+PP.RxEvent.Runt
				bne .1

				lda #ERR.DEV.NOFRAME

.9				plp
				sec
				rts
				
.1				lda RTDATA+1,x			discard RxStatus
				lda RTDATA,x
				
				lda RTDATA+1,x
				sta Size+1

				lda RTDATA,x			get RxLength
				sta Size
				clc
				adc #2
				tay

				lda Size+1
				adc #0

				>SYSCALL GetMem.YA
				bcs .9
				
				>STYA ZPTmpPTR
				stx .8+1
				sty .8+3
				sta .8+5
				
				lda Size
				sta (ZPTmpPTR)
				eor #$ff
				sta Counter
				ldy #1
				lda Size+1
				sta (ZPTmpPTR),y
				eor #$ff
				sta Counter+1
				
				iny
				
				ldx DEVSLOTx0

.2				inc Counter
				bne .3
				inc Counter+1
				beq .8
				
.3				lda RTDATA,x
				sta	(ZPTmpPTR),y
				iny
				bne .4
				inc ZPTmpPTR+1
				
.4				inc Counter
				bne .5
				inc Counter+1
				beq .8
				
.5				lda RTDATA+1,x
				sta	(ZPTmpPTR),y
				iny
				bne .2
				inc ZPTmpPTR+1
				bne .2
				
.8				ldx	#$ff				hMem
				ldy	#$ff				PtrLO
				lda #$ff				PtrHI
				
				plp
				clc
				rts
*--------------------------------------
WRITEBLOCK		php
				sei
				>STYA ZPTmpPTR
				
				ldx #5
				ldy #S.ETH.SRCMAC+5
				
.10				lda MAC,x
				sta (ZPTmpPTR),y
				dey
				dex
				bpl .10

				ldx DEVSLOTx0
				
				lda /PP.TxCMD.LID+PP.TxCMD.TxStartFULL
				sta TxCMD+1,x
				lda #PP.TxCMD.LID+PP.TxCMD.TxStartFULL
				sta TxCMD,x
				
				ldy #1
				lda (ZPTmpPTR),y
				sta TxLength+1,x
				eor #$ff
				sta Counter+1

				lda (ZPTmpPTR)
				sta TxLength,x
				eor #$ff
				sta Counter
				
				lda /PP.BusST		
				sta PacketPagePTR+1,x
				lda #PP.BusST		
				sta PacketPagePTR,x

				ldy #16
				
.1				lda	PacketPageDATA+1,x
				and /PP.BusST.Rdy4TxNOW
				bne WRITEBLOCK.1
				
				lda	PacketPageDATA,x
				and #PP.BusST.TxBidErr
				bne .9
				
				dey
				bne	.1
				
.9				lda #ERR.DEV.NOBUFFER
				plp
				sec
				rts
				
WRITEBLOCK.1	ldy #2

.1				inc Counter
				bne .2
				inc Counter+1
				beq .8
				
.2				lda	(ZPTmpPTR),y
				sta RTDATA,x
				iny
				bne .3
				inc ZPTmpPTR+1
				
.3				inc Counter
				bne .4
				inc Counter+1
				beq .8
				
.4				lda	(ZPTmpPTR),y
				sta RTDATA+1,x
				iny
				bne .1
				inc ZPTmpPTR+1
				bne .1
				
.8				plp
				clc
				rts	
*--------------------------------------
OPEN			jsr CLOSE

				lda /PP.RxCTL
				sta PacketPagePTR+1,x
				lda #PP.RxCTL
				sta PacketPagePTR,x
				
				lda /PP.RxCTL.LID+PP.RxCTL.RxOKA+PP.RxCTL.IA+PP.RxCTL.BroadcastA+PP.RxCTL.RuntA
				sta PacketPageDATA+1,x
				lda #PP.RxCTL.LID+PP.RxCTL.RxOKA+PP.RxCTL.IA+PP.RxCTL.BroadcastA+PP.RxCTL.RuntA
				sta PacketPageDATA,x

				lda /PP.MAC
				sta PacketPagePTR+1,x
				lda #PP.MAC
				sta PacketPagePTR,x

				>LDYA MAC
				>STYA PacketPageDATA,x
				>LDYAI PP.MAC+2
				>STYA PacketPagePTR,x
				>LDYA MAC+2
				>STYA PacketPageDATA,x
				>LDYAI PP.MAC+4
				>STYA PacketPagePTR,x
				>LDYA MAC+4
				>STYA PacketPageDATA,x
				
				lda /PP.LineCTL
				sta PacketPagePTR+1,x
				lda #PP.LineCTL
				sta PacketPagePTR,x

				lda /PP.LineCTL.LID+PP.LineCTL.SerRxOn+PP.LineCTL.SerTxOn+PP.LineCTL.10BaseT
				sta PacketPageDATA+1,x
				lda #PP.LineCTL.LID+PP.LineCTL.SerRxOn+PP.LineCTL.SerTxOn+PP.LineCTL.10BaseT
				sta PacketPageDATA,x
				
				clc
				rts
*--------------------------------------
CLOSE			ldx DEVSLOTx0
				
				lda /PP.SelfCTL
				sta PacketPagePTR+1,x
				lda #PP.SelfCTL
				sta PacketPagePTR,x
				
				lda /PP.SelfCTL.LID+PP.SelfCTL.RESET
				sta PacketPageDATA+1,x

				lda #PP.SelfCTL.LID+PP.SelfCTL.RESET
				sta PacketPageDATA,x
				
				lda /PP.SelfST
				sta PacketPagePTR+1,x
				lda #PP.SelfST
				sta PacketPagePTR,x
				
				ldy #0
				
.1				lda PacketPageDATA+1,x
				lda PacketPageDATA,x
				and #PP.SelfST.InitDone
				
				bne .8
				
				iny
				bne .1
				
.8				clc
				rts
*--------------------------------------
DRV.CS.END
DEVSLOTx0		.BS 1
*--------------------------------------
DEVSTAT			.DA #0
				.BS 3					size
				>PSTR "Uthernet/CS8900A"
				.DA #S.DSTAT.T.NET
				.BS 1					Subtype
				.BS 2					Version
*--------------------------------------
FLAGS			.DA #0
LINK.STATUS		.BS 1					OK/DUPLEX/SPEED
MAC				.BS 6
MAN
SAVE /A2OSX.SRC/DRV/UTHERNET.DRV.S
ASM