PR#3
PREFIX /A2OSX.BUILD
NEW
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF /A2OSX.BUILD/SBIN/GUIOSD
*--------------------------------------
				.INB /A2OSX.BUILD/INC/MACROS.I
				.INB /A2OSX.BUILD/INC/A2OSX.I
				.INB /A2OSX.BUILD/INC/PRODOS.I
				.INB /A2OSX.BUILD/INC/IO.I
				.INB /A2OSX.BUILD/INC/LIBGUI.I
*--------------------------------------
A1L				.EQ $3C
A2L				.EQ $3E
A4L				.EQ $42

MoveAux			.EQ $C311
XFer			.EQ $C314
*--------------------------------------
CS.START		cld
				jmp (.1,x)
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					BIN Layout Version 1
				.DA 0
				.DA CS.END-CS.START		CS
				.DA DS.END-DS.START		DS
				.DA #64					SS
				.DA #0					ZP
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT
				.DA	CS.QUIT
				.DA 0				
*--------------------------------------
CS.INIT			
				lda #0
				sec
				rts
*--------------------------------------
CS.RUN			clc
				rts
*--------------------------------------
CS.DOEVENT		sec
				rts
*--------------------------------------
CS.QUIT			clc
				rts
*--------------------------------------
CS.END
*--------------------------------------
				.PH	$0C00
*--------------------------------------
ZPCmdPtr		.EQ ZPDRV
ZPDestBMPtr		.EQ ZPDRV+2
*--------------------------------------
* YA =Ptr to S.CB in MAIN****
* X = DestBM hMem 
*--------------------------------------
GUIOSD			>STYA A1L				Src Start Address (MAIN)
				pha
				
				tya
				clc
				adc #S.CB
				sta A2L					Src End Address (MAIN)
				pla
				adc /S.CB
				sta A2L+1
				
				>LDYA CB.Cache
				>STYA A4L				Dst Address (AUX)
				
				sec						Main To Aux
				jsr MoveAux
				
				txa
				ldx #SYS.GetMemPtr.A	Get AUX Stock Object
				jsr $E000				with GetMem

				>STYA ZPDestBMPtr

				ldx #0
				
.1				lda (ZPDestBMPtr)				
				sta DestBM.Cache,x
				inc ZPDestBMPtr
				bne .2
				inc ZPDestBMPtr+1
.2				inx
				cpx #S.BM
				bne .1
				
				ldx	CB.Cache+S.CB.CMD			
									
				jmp (J.Cmds,x)
*--------------------------------------
J.Cmds			.DA SETPIXEL
				.DA GETPIXEL
				.DA HLINE
				.DA VLINE
				.DA FILLRECT
				.DA BITBLT
				.DA GETRECTBUFSIZE
*--------------------------------------
SETPIXEL		>LDYA CB.Cache+S.CB.Y1
				ldx DestBM.Cache+S.BM.RowBytes
				jsr YAMultX
				
				pha
				tya
				
				clc
				adc ZPDestBMPtr
				sta ZPDestBMPtr
				pla
				adc ZPDestBMPtr+1
				sta ZPDestBMPtr+1
				
				lda CB.Cache+S.CB.MODE
				bit #S.CB.MODE.C16
				bne SETPIXEL.C16
				
SETPIXEL.MONO	lda CB.Cache+S.CB.X1
				pha
				and #$7					MOD 7
				tax
				pla
				lsr CB.Cache+S.CB.X1
				ror
				lsr CB.Cache+S.CB.X1
				ror
				lsr CB.Cache+S.CB.X1
				ror
				clc
				adc ZPDestBMPtr
				sta ZPDestBMPtr
				
				lda CB.Cache+S.CB.X1
				adc ZPDestBMPtr+1
				sta ZPDestBMPtr+1

				lda CB.Cache+S.CB.OP
*				cmp #S.CB.OP.XOR
				beq SETPIXEL.MONO.XOR
				
				lda CB.Cache+S.CB.COLOR
				bne SETPIXEL.MONO.WHITE
				
SETPIXEL.MONO.BLACK				
				lda (ZPDestBMPtr)
				and Mono.NMasks,x
				sta (ZPDestBMPtr)

				rts

SETPIXEL.MONO.WHITE
				lda (ZPDestBMPtr)
				ora Mono.Masks,x
				sta (ZPDestBMPtr)
				
				rts
				
SETPIXEL.MONO.XOR				
				lda (ZPDestBMPtr)
				eor Mono.Masks,x
				sta (ZPDestBMPtr)
				
				rts				
SETPIXEL.C16				
*--------------------------------------
GETPIXEL
*--------------------------------------
HLINE
*--------------------------------------
VLINE
*--------------------------------------
FILLRECT
*--------------------------------------
BITBLT
*--------------------------------------
GETRECTBUFSIZE
*--------------------------------------
*--------------------------------------
* IN:
* Y,A = num1 (16)
* X = num2 (8)
* OUT:
* Y,A = (Y,A) * X
*--------------------------------------
YAMultX			stx GBYTE

				sty GWORD
				sta GWORD+1
				
				ldy #0					Result LO
				tya						Result HI
				
				bra .3
				
.1				pha
				tya
				clc
				adc GWORD
				tay
				pla
				adc GWORD+1
				
.2				asl GWORD
				rol GWORD+1
				
.3				lsr GBYTE
				bcs .1
				bne .2
				rts
*--------------------------------------
Mono.NMasks		.DA #%11111110
				.DA #%11111101
				.DA #%11111011
				.DA #%11110111
				.DA #%11101111
				.DA #%11011111
				.DA #%10111111
				.DA #%01111111
*--------------------------------------
Mono.Masks		.DA	#%00000001
				.DA #%00000010
				.DA #%00000100
				.DA #%00001000
				.DA #%00010000
				.DA #%00100000
				.DA #%01000000
				.DA #%10000000
*--------------------------------------
CB.Cache		.BS S.CB
DestBM.Cache	.BS S.BM
GBYTE			.BS 1
GWORD			.BS 2			
*--------------------------------------
				.EP
*--------------------------------------
				.DUMMY
				.OR 0
DS.START
DS.END
				.ED
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SBIN/GUIOSD
ASM