mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-26 13:49:18 +00:00
439 lines
7.6 KiB
Plaintext
439 lines
7.6 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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NEW
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INC 1
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AUTO 6
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.LIST OFF
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.OP 65C02
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.OR $2000
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.TF /A2OSX.BUILD/LIB/LIBGFX.O
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*--------------------------------------
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.INB /A2OSX.BUILD/INC/MACROS.I
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.INB /A2OSX.BUILD/INC/A2OSX.I
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.INB /A2OSX.BUILD/INC/LIBGFX.I
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*--------------------------------------
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.MA SWAP16
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lda ]1
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ldx ]2
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stx ]1
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sta ]2
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lda ]1+1
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ldx ]2+1
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stx ]1+1
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sta ]2+1
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.EM
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.MA NOT16
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sec
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lda #0
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sbc ]1
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sta ]1
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lda #0
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sbc ]1+1
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sta ]1+1
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.EM
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*--------------------------------------
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ZPCBPtr .EQ ZPLIB
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ZPDCPtr .EQ ZPLIB+2
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*--------------------------------------
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* File Header (16 Bytes)
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*--------------------------------------
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CS.START cld
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jmp (.1,x)
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.DA #$61 6502,Level 1 (65c02)
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.DA #1 BIN Layout Version 1
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.DA 0
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.DA CS.END-CS.START
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.DA 0
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.DA 0
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.DA 0
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*--------------------------------------
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* Relocation Table
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*--------------------------------------
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.1 .DA LIB.LOAD
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.DA LIB.UNLOAD
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.DA InitGFXA
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.DA CloseGFX
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.DA InitCursor
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.DA SetCursorYA
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.DA HideCursor
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.DA ShowCursor
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.DA DrawLine
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L.CB.Cache .DA CB.Cache
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.DA 0
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*--------------------------------------
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LIB.LOAD
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LIB.UNLOAD clc
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rts
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*--------------------------------------
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InitGFXA sta hDev
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>SYSCALL GetDevByIDA
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>STYA GoDevGFX.1+1
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clc
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rts
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*--------------------------------------
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CloseGFX
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stz hDev
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sec
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rts
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*--------------------------------------
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InitCursor
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*--------------------------------------
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SetCursorYA
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*--------------------------------------
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HideCursor
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*--------------------------------------
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ShowCursor
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clc
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rts
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*--------------------------------------
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* In: Control Block
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* hDC
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* OP
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* MODE
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* COLOR
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* X1
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* Y1
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* X2
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* Y2
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*--------------------------------------
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DrawLine ldy #S.CB.Y2+1
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jsr GetCB
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sec
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lda CB.Cache+S.CB.X2
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sbc CB.Cache+S.CB.X1
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sta DX
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lda CB.Cache+S.CB.X2+1
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sbc CB.Cache+S.CB.X1+1
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sta DX+1 DX% = X2% - X1%
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bmi .1 DX < 0....
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ora DX
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bne .2 DX > 0...
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ldx #DEVMGR.GFX.VLINE
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jmp GoDevGFX DX=0 : VLIN Y1,Y2 At X1
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.1 >SWAP16 CB.Cache+S.CB.X1,CB.Cache+S.CB.X2
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* >SWAP16 CB.Cache+S.CB.Y1,CB.Cache+S.CB.Y2
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lda CB.Cache+S.CB.Y1
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ldx CB.Cache+S.CB.Y2
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stx CB.Cache+S.CB.Y1
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sta CB.Cache+S.CB.Y2
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>NOT16 DX swap X1/X2, Y1/Y2, set DX=-DX (DX positive)
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.2 lda #1
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sta IY
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lda CB.Cache+S.CB.Y2
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sec
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sbc CB.Cache+S.CB.Y1
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sta DY
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* lda CB.Cache+S.CB.Y2+1
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lda #0
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* sbc CB.Cache+S.CB.Y1+1
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sbc #0
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sta DY+1 DY% = Y2% - Y1%
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bmi .3 DY < 0 ...
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ora DY
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bne .4
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ldx #DEVMGR.GFX.HLINE
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jmp GoDevGFX DY=0 : HLIN X1,X2 At Y1
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.3 >NOT16 DY set DY=-DY
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lda #$ff
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sta IY set IY=-1
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.4 ldx #DEVMGR.GFX.SETPIXEL
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jsr GoDevGFX
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lda DX
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sec
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sbc DY
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tax
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lda DX+1
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* sbc DY+1
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sbc #0
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bmi DrawLine.IncY DY is greater than DX, we will increase on Y axis
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txa
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beq DrawLine.IncXY DX=DY, go inc X & Y
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jmp DrawLine.IncX DY is lower than DX, we will increase on X axis
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DrawLine.IncXY lda DX DX=DY
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eor #$ff
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sta Counter
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lda DX+1
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eor #$ff
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sta Counter+1
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.1 inc Counter
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bne .2
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inc Counter+1
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beq .8
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.2 inc CB.Cache+S.CB.X1
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bne .3
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inc CB.Cache+S.CB.X1+1
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.3 lda CB.Cache+S.CB.Y1 Y1=Y1+IY
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clc
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adc IY
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sta CB.Cache+S.CB.Y1
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ldx #DEVMGR.GFX.SETPIXEL
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jsr GoDevGFX
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bra .1
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.8 rts
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DrawLine.IncY lda DY
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eor #$ff
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sta Counter
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lda DY+1
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eor #$ff
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sta Counter+1
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lda DX IE=2*DX
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asl
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sta IE
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pha
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lda DX+1
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rol
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sta IE+1
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tax
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pla D=IE-DY
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sec
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sbc DY
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sta D
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txa
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sbc DY+1
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sta D+1
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lda DX INE=2*(DX-DY)
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sec
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sbc DY
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pha
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lda DX+1
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sbc DY+1
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tax
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pla
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asl
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sta INE
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txa
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rol
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sta INE+1
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.1 inc Counter
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bne .2
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inc Counter+1
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beq .8
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.2 lda D+1 IF D < 0 ...
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bmi .4
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lda D D > 0 : D=D+INE
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clc
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adc INE
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sta D
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lda D+1
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adc INE+1
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sta D+1
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inc CB.Cache+S.CB.X1 X1=X1+1
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bne .5
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inc CB.Cache+S.CB.X1+1
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bra .5
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.4 lda D D > 0 : D=D+IE
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clc
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adc IE
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sta D
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lda D+1
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adc IE+1
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sta D+1
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.5 lda CB.Cache+S.CB.Y1 Y1=Y1+IY
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clc
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adc IY
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sta CB.Cache+S.CB.Y1
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ldx #DEVMGR.GFX.SETPIXEL
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jsr GoDevGFX
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bra .1
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.8 rts
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DrawLine.IncX lda DX
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eor #$ff
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sta Counter
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lda DX+1
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eor #$ff
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sta Counter+1
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lda DY IE=2*DY
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asl
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sta IE
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pha
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* lda DY+1
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lda #0
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rol
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sta IE+1
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tax
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pla D=IE-DX
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sec
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sbc DX
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sta D
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txa
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sbc DX+1
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sta D+1
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lda DY INE=2*(DY-DX)
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sec
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sbc DX
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pha
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* lda DY+1
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lda #0
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sbc DX+1
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tax
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pla
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asl
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sta INE
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txa
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rol
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sta INE+1
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.1 inc Counter
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bne .2
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inc Counter+1
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beq .8
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.2 lda D+1 ID D < 0 ....
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bmi .4
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lda D D > 0 : D=D+INE
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clc
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adc INE
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sta D
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lda D+1
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adc INE+1
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sta D+1
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lda CB.Cache+S.CB.Y1 Y1=Y1+IY
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clc
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adc IY
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sta CB.Cache+S.CB.Y1
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bra .5
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.4 lda D D < 0 : D=D+IE
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clc
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adc IE
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sta D
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lda D+1
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adc IE+1
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sta D+1
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.5 inc CB.Cache+S.CB.X1 X1=X1+1
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bne .6
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inc CB.Cache+S.CB.X1+1
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.6 ldx #DEVMGR.GFX.SETPIXEL
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jsr GoDevGFX
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bra .1
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.8 rts
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*--------------------------------------
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GetCB >PULLW ZPCBPtr
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.1 lda (ZPCBPtr),y Y=Byte count to cache
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sta CB.Cache,y
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dey
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bpl .1
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rts
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*--------------------------------------
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GoDevGFX >LDYA L.CB.Cache
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GoDevGFX.1 jmp $ffff
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*--------------------------------------
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CS.END
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hDev .BS 1
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*--------------------------------------
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DX .BS 2
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DY .BS 2
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IY .BS 1
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IE .BS 2
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D .BS 2
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INE .BS 2
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Counter .BS 2
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*--------------------------------------
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CB.Cache .BS S.CB
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*--------------------------------------
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CUR.Arrow .DA #0
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.DA #0
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CUR.Arrow.DATA .DA %00000001.000000000
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.DA %00000011.000000000
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.DA %00000101.000000000
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.DA %00001001.000000000
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.DA %00010001.000000000
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.DA %00100011.000000000
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.DA %01110101.000000000
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.DA %00011000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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CUR.Arrow.MASK .DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000010.000000000
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.DA %00000110.000000000
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.DA %00001110.000000000
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.DA %00011100.000000000
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.DA %00001000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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.DA %00000000.000000000
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*--------------------------------------
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PAT.Arrow .DA #S.BM.F.BBP1
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.DA #1 RowBytes
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.DA 7 W
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.DA 8 H
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.DA 0
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/LIB/LIBGFX.S
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ASM
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