PR#3
PREFIX /A2OSX.SRC
LOMEM $900
INC 1
AUTO 6
				.LIST OFF
*--------------------------------------
DevMgr.LoMem	.EQ *
*--------------------------------------
DevMgr.NUL.Code cld
				jmp (.1,x)
.1				.DA DevMgr.NUL.Status
				.DA DevMgr.BADCALL	READBLOCK
				.DA DevMgr.BADCALL	WRITEBLOCK
				.DA DevMgr.BADCALL	FORMAT
				.DA DevMgr.BADCALL	CONTROL
				.DA DevMgr.BADCALL	INIT
				.DA DevMgr.BADCALL	OPEN
				.DA DevMgr.BADCALL	CLOSE
				.DA DevMgr.BADCALL	READ
				.DA .8				WRITE
.8				clc
				rts
*--------------------------------------
DevMgr.NUL.Status
				>LDYAI DevMgr.NUL.Stat
				clc
				rts
*--------------------------------------
DevMgr.NUL.Stat	.DA #S.DEV.S.WRITE+S.DEV.S.READ
				.DA #0,#0,#0
				>PSTR "NULL DEVICE     "
				.DA #S.DEVSTAT.TYPE.CHAR
				.DA #0
				.DA $0900
*--------------------------------------
DevMgr.SYS.Code	cld
				jmp (.1,x)
.1				.DA DevMgr.SYS.Status
				.DA DevMgr.BADCALL	READBLOCK
				.DA DevMgr.BADCALL	WRITEBLOCK
				.DA DevMgr.BADCALL	FORMAT
				.DA DevMgr.SYS.Control
				.DA DevMgr.BADCALL	INIT
				.DA DevMgr.SYS.Open
				.DA DevMgr.BADCALL	CLOSE
				.DA DevMgr.SYS.Read
				.DA DevMgr.SYS.Write
*--------------------------------------
DevMgr.BADCALL	lda #MLI.ERR.BADCALL
				sec
				rts
*--------------------------------------
DevMgr.SYS.Status
				>LDYAI DevMgr.SYS.Stat
				clc
				rts
*--------------------------------------
DevMgr.SYS.Stat	.DA #S.DEV.S.WRITE+S.DEV.S.READ
				.DA #0,#0,#0
				>PSTR "A2osX SYS Screen"
				.DA #S.DEVSTAT.TYPE.CHAR
				.DA #0
				.DA $0900
*--------------------------------------
DevMgr.SYS.Open stz DevMgr.SYS.CH
				stz DevMgr.SYS.CV
				
				ldx #0
				
				ldy #0
.1				lda DevMgr.SYS.TITLE,y
				beq .2
				
				jsr DevMgr.SYS.SetCharAtYX
				iny
				bne .1
				
.2				lda #$20
				jsr DevMgr.SYS.SetCharAtYX
				iny
				cpy #80
				bne .2
				
				jsr DevMgr.SYS.Home
				
				lda #1
				sta A2osX.SCRNDEVS+1	fall in Control
*--------------------------------------
DevMgr.SYS.Control
				sta SETTEXT
				sta SETALTCHAR
				sta SET80DISP
				sta CLR80STORE
				sta SETPAGE2
				lda #2
				sta A2osX.ASCREEN
				clc
				rts
*--------------------------------------
DevMgr.SYS.Read	lda A2osX.ASCREEN
				cmp #2					is SYS active?
				bne .9
				
				lda	OPENAPPLE
				bmi .9					Open apple key, not for us...
				lda KBD
				bpl .9
				sta KBDSTROBE
				
				and #$7F

				clc
				rts
				
.9				lda	#0					Error = no event
				sec
				rts
*--------------------------------------
DevMgr.SYS.Write
				phx
				phy
				cmp #' '
				bcc .1
				ldy DevMgr.SYS.CH
				ldx DevMgr.SYS.CV
				ora #$80
				jsr DevMgr.SYS.SetCharAtYX
				jsr DevMgr.SYS.FSOut
				bra .8
				
.1				cmp #10
				bne .2
				jsr DevMgr.SYS.LF
				bra .8
				
.2				cmp #13
				bne .3
				jsr DevMgr.SYS.CROut
				bra .8
				
.3				ora #$20
				jsr DevMgr.SYS.SetCharAtYX
				jsr DevMgr.SYS.FSOut
				
.8				ply
				plx
				clc
				rts
*--------------------------------------
DevMgr.SYS.FSOut
				lda DevMgr.SYS.CH
				cmp #79
				beq DevMgr.SYS.LF1
				inc DevMgr.SYS.CH
				rts
*--------------------------------------
DevMgr.SYS.CROut
				jsr DevMgr.SYS.ClrEOL
*--------------------------------------
DevMgr.SYS.LF1	stz DevMgr.SYS.CH
DevMgr.SYS.LF	ldx DevMgr.SYS.CV
				cpx #23
				beq DevMgr.SYS.Scroll
				inc DevMgr.SYS.CV				
				rts
*--------------------------------------
DevMgr.SYS.ClrEOL
				ldx	DevMgr.SYS.CV
				lda #$A0
				ldy DevMgr.SYS.CH
.1				cpy #79
				beq .2
				jsr DevMgr.SYS.SetCharAtYX
				iny
				bne .1
.2				rts
*--------------------------------------
DevMgr.SYS.Scroll
				ldx #1
.1				lda DevMgr.SYS.BASEL,x
				sta ZPDRV
				lda DevMgr.SYS.BASEH,x
				sta ZPDRV+1
				inx
				lda DevMgr.SYS.BASEL,x
				sta ZPDRV+2
				lda DevMgr.SYS.BASEH,x
				sta ZPDRV+3

				php
				sei
				sta SETWRITEAUX
				sta SETREADAUX

				ldy #39
.2				lda (ZPDRV+2),y
				sta (ZPDRV),y
				dey
				bpl .2

				sta CLRWRITEAUX
				sta CLRREADAUX
				plp
				
				ldy #39
.3				lda (ZPDRV+2),y
				sta (ZPDRV),y
				dey
				bpl .3

				cpx #23
				bne .1					Fall in ClrLineAtX for last line
*--------------------------------------
DevMgr.SYS.ClrLineAtX
				lda DevMgr.SYS.BASEL,x
				sta ZPDRV
				lda DevMgr.SYS.BASEH,x
				sta ZPDRV+1

				php
				sei
				
				lda #$A0
				ldy #39
				
.1				sta SETWRITEAUX
				sta (ZPDRV),y
				sta CLRWRITEAUX
				sta (ZPDRV),y
				dey
				bpl .1

				plp
				
				rts
*--------------------------------------
DevMgr.SYS.Home	ldx #23
				
.1				jsr DevMgr.SYS.ClrLineAtX
				dex
				bne .1
				
				stz DevMgr.SYS.CH
				lda #1
				sta DevMgr.SYS.CV
								
				rts
*--------------------------------------
DevMgr.SYS.SetCharAtYX
				cmp #$40
				bcc .1
				cmp #$5F
				bcs .1
				and #$3F
				
.1				php
				
				phy
				pha
				lda DevMgr.SYS.BASEL,x
				sta ZPDRV
				lda DevMgr.SYS.BASEH,x
				sta ZPDRV+1
				tya
				lsr
				tay
				bcs .2
				sta SETWRITEAUX
				
.2				pla
				sta (ZPDRV),y
				sta CLRWRITEAUX
				ply
				
				plp
				
				rts
*--------------------------------------
DevMgr.SYS.CH		.BS 1
DevMgr.SYS.CV		.BS 1
*--------------------------------------
DevMgr.SYS.TITLE	>CSTR "A2osX System Screen"
DevMgr.SYS.BASEL	.HS	00.80.00.80.00.80.00.80.28.A8.28.A8.28.A8.28.A8.50.D0.50.D0.50.D0.50.D0
DevMgr.SYS.BASEH	.HS	08.08.09.09.0A.0A.0B.0B.08.08.09.09.0A.0A.0B.0B.08.08.09.09.0A.0A.0B.0B
*--------------------------------------
DevMgr.FreeMem		.EQ *
MAN
SAVE SYS/KERNEL.S.D01
LOAD SYS/KERNEL.S
ASM