PR#3
PREFIX /A2OSX.BUILD
NEW
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
*--------------------------------------
* !!!!!!!! DO NOT USE VCPU16 !!!!!!!!
* !!!!!! DO NOT USE ZPQuickPTRs !!!!!
*--------------------------------------
SYSSCR.BASL		.EQ ZPSysScr			COUT
SYSSCR.BASLTMP	.EQ ZPSysScr+2			Scrolling
SYSSCR.STRPTR	.EQ ZPSysScr+4			PPSTR
*--------------------------------------
SYSSCR.BASL0	.EQ $800	
*--------------------------------------
* S.SysScrInit
*--------------------------------------
S.SysScrInit	stz SYSSCR.CPULOADI
				stz SYSSCR.CH
				stz SYSSCR.CV
				
				ldx #0
				
				ldy #0
.1				lda SYSSCR.TITLE,y
				beq .2
				
				jsr S.SysScrSetCharAtYX
				iny
				bne .1
				
.2				lda #$20
				jsr S.SysScrSetCharAtYX
				iny
				cpy #80
				bne .2
				
				jsr S.SysScrHOME
				
				lda A2osX.SCREENS
				ora #A2osX.SCREENS.S
				sta A2osX.SCREENS
				lda #A2osX.SCREENS.S
				jsr S.ScreenSelectA
				clc
				rts
*--------------------------------------
* S.ScreenSelectA
*  IN :
*   A = Screen to display
*--------------------------------------
S.ScreenSelectA	and A2osX.SCREENS		Screen is available ?
				beq .9					...not setup up
				
				cmp #A2osX.SCREENS.S
				bne .1
				sta SETTEXT
				sta SET80DISP
				sta CLR80STORE
				sta SETPAGE2
				sta SETALTCHAR
				lda #A2osX.SCREENS.S
				bra .8

.1				cmp #A2osX.SCREENS.C
				bne .2
				sta SETTEXT
				sta SET80DISP
				sta CLRPAGE2
				sta SET80STORE
				sta SETALTCHAR
				lda #A2osX.SCREENS.C
				bra .8
				
.2				cmp #A2osX.SCREENS.G
				bne .9

				sta CLRTEXT
				sta CLRMIXED
				sta SETHIRES
				sta CLRPAGE2
				
				sta SET80DISP
				sta SETIOUDIS
				sta SETDHIRES
				sta CLRDHIRES
				sta SETDHIRES
				sta CLRDHIRES
				sta SETDHIRES

				lda #A2osX.SCREENS.G
				
.8				sta A2osX.ACTIVESCRN
.9				rts
*--------------------------------------
S.SysScrCPULoad ldx SYSSCR.CPULOADI
				lda SYSSCR.CPULOADC,x
				sta SYSSCR.BASL0+38
				dec SYSSCR.CPULOADI
				bpl .1
				lda #3
				sta SYSSCR.CPULOADI
.1				rts
*--------------------------------------
* S.SysScrPRCode
*  In:
* 	CC : Prints [OK]  
* 	CS : [$$]  at column 36-39
*--------------------------------------
S.SysScrPRCode 	php						save P to keep carry
				bcs .1
				lda #0					ensure we have ERR=0 if	cc
.1				pha
				ldy #76					HTAB to 76
				sty	SYSSCR.CH
				lda #"["
				jsr S.SysScrCOUTA
				pla
				pha
				bne .2
				
				lda #"O"
				jsr S.SysScrCOUTA
				lda #"K"
				jsr S.SysScrCOUTA
				bra .3
				
.2				jsr S.SysScrPRBYTEA
.3				lda #"]"
				jsr S.SysScrCOUTA
				pla
				plp
				rts
*--------------------------------------
S.SysScrPPSTRA	jsr S.GetMemPtrA
S.SysScrPPSTR	>STYA SYSSCR.STRPTR
				lda (SYSSCR.STRPTR)
				beq .9
				ldy #0
.1				iny
				lda (SYSSCR.STRPTR),y
				cmp #'\'
				bne .7
				tya
				cmp (SYSSCR.STRPTR)
				beq .9
				iny
				lda (SYSSCR.STRPTR),y
				cmp #'n'
				bne .7
				lda #13
.7				jsr S.SysScrCOUTA
.8				tya
				cmp (SYSSCR.STRPTR)
				bne .1
.9				>LDYA SYSSCR.STRPTR
				rts
*--------------------------------------
S.SysScrPRBYTEA	pha
				lsr
				lsr
				lsr
				lsr
				ora #$B0
				cmp #$BA
				bcc .1
				adc #6
.1				jsr S.SysScrCOUTA
				pla
				and #$0F
				ora #$B0
				cmp #$BA
				bcc S.SysScrCOUTA
				adc #6
*--------------------------------------
S.SysScrCOUTA	phx
				phy
				cmp #13
				bne .1
				jsr S.SysScrCROUT
				ply
				plx
				rts
				
.1				ldy SYSSCR.CH
				ldx SYSSCR.CV
				ora #$80
				jsr S.SysScrSetCharAtYX
				jsr S.SysScrFSOUT
				ply
				plx
				rts
*--------------------------------------
S.SysScrFSOUT	lda SYSSCR.CH
				cmp #79
				beq S.SysScrCROUT1
				inc SYSSCR.CH
				rts
*--------------------------------------
S.SysScrCROUT	jsr S.SysScrCLREOL
S.SysScrCROUT1	stz SYSSCR.CH
				ldx SYSSCR.CV
				cpx #23
				beq S.SysScrScroll
				inc SYSSCR.CV				
				rts
*--------------------------------------
S.SysScrCLREOL	ldx	SYSSCR.CV
				lda #$A0
				ldy SYSSCR.CH
.1				cpy #79
				beq .2
				jsr S.SysScrSetCharAtYX
				iny
				bne .1
.2				rts
*--------------------------------------
S.SysScrScroll	ldx #1
.1				lda SYSSCR.BASEL,x
				sta SYSSCR.BASL
				lda SYSSCR.BASEH,x
				sta SYSSCR.BASL+1
				inx
				lda SYSSCR.BASEL,x
				sta SYSSCR.BASLTMP
				lda SYSSCR.BASEH,x
				sta SYSSCR.BASLTMP+1

				ldy #39
				sta SETWRITEAUX
				sta SETREADAUX
.2				lda (SYSSCR.BASLTMP),y
				sta (SYSSCR.BASL),y
				dey
				bpl .2

				ldy #39
				sta CLRWRITEAUX
				sta CLRREADAUX
.3				lda (SYSSCR.BASLTMP),y
				sta (SYSSCR.BASL),y
				dey
				bpl .3

				cpx #23
				bne .1

				ldy #39
				lda #$A0
.4				sta SETWRITEAUX
				sta (SYSSCR.BASLTMP),y
				sta CLRWRITEAUX
				sta (SYSSCR.BASLTMP),y
				dey
				bpl .4
				rts
*--------------------------------------
S.SysScrClrLineAtX
				lda SYSSCR.BASEL,x
				sta SYSSCR.BASL
				lda SYSSCR.BASEH,x
				sta SYSSCR.BASL+1
				
				lda #$A0

				ldy #39
				sta SETWRITEAUX
.1				sta (SYSSCR.BASL),y
				dey
				bpl .1

				ldy #39
				sta CLRWRITEAUX
.2				sta (SYSSCR.BASL),y
				dey
				bpl .2

				rts
*--------------------------------------
S.SysScrHOME	ldx #23
				
.1				jsr S.SysScrClrLineAtX
				dex
				bne .1
				
				stz SYSSCR.CH
				lda #1
				sta SYSSCR.CV
								
				rts
*--------------------------------------
S.SysScrSetCharAtYX
				cmp #$40
				bcc .1
				cmp #$5F
				bcs .1
				and #$3F
				
.1				phy
				pha
				lda SYSSCR.BASEL,x
				sta SYSSCR.BASL
				lda SYSSCR.BASEH,x
				sta SYSSCR.BASL+1
				tya
				lsr
				tay
				bcs .2
				sta SETWRITEAUX
				
.2				pla
				sta (SYSSCR.BASL),y
				sta CLRWRITEAUX
				ply
				rts
*--------------------------------------
SYSSCR.CH		.BS 1
SYSSCR.CV		.BS 1
SYSSCR.CPULOADI .BS 1
SYSSCR.CPULOADC	.AS -"|\-/"
*--------------------------------------
SYSSCR.TITLE	>CSTRING "A2osX System Screen"
SYSSCR.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
SYSSCR.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
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.SCR
LOAD SYS/KERNEL.S
ASM