A2osX/DRV/DHGR.DRV.S.LINE.txt

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NEW
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AUTO 3,1
*--------------------------------------
* HLINE X1,X2 at Y1 (XOR,SET,ORA)
*--------------------------------------
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HLINE lda CB.Cache+S.CB.M
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cmp #S.CB.M.MONO
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bne HLINE.C16
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HLINE.MONO >LDYA CB.Cache+S.CB.X1
jsr LBUF.SetBounds1YA
>LDYA CB.Cache+S.CB.X2
jsr LBUF.SetBounds2YA
lda CB.Cache+S.CB.COLOR
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beq .1
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lda #%01111111
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.1 ldx LBUF.C1
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.2 sta LBUF.DATA,x
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cpx LBUF.C2
inx
bcc .2
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ldy CB.Cache+S.CB.Y1
jmp LBUF.DrawAtY
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HLINE.C16 lda CB.Cache+S.CB.X1
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and #%11111100
tay
lda CB.Cache+S.CB.X1+1
jsr LBUF.SetBounds1YA
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lda CB.Cache+S.CB.X2
ora #%00000011
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tay
lda CB.Cache+S.CB.X2+1
jsr LBUF.SetBounds2YA
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lda CB.Cache+S.CB.COLOR
asl
asl
clc
adc L.Color.Pixels
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sta ZPTmpWord
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lda L.Color.Pixels+1
adc #0
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sta ZPTmpWord+1
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ldx LBUF.C1
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.1 txa
and #3 Compute index in Palette (Mod 4)
tay
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.2 lda (ZPTmpWord),y
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sta LBUF.DATA,x
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cpx LBUF.C2
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inx
bcc .1
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ldy CB.Cache+S.CB.Y1
jmp LBUF.DrawAtY
*--------------------------------------
* VLINE Y1,Y2 at X1 (XOR,SET,ORA)
*--------------------------------------
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VLINE lda CB.Cache+S.CB.M
cmp #S.CB.M.MONO
bne VLINE.C16
VLINE.MONO >LDYA CB.Cache+S.CB.X1
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jsr DIVMOD7YA X = MOD 7
tay
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lsr
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sta ZPTmpByte Save COL (DIV)
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lda COL.BANK,y
tay
sta $C000,y Select proper BANK
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ldy CB.Cache+S.CB.Y1
clc
lda CB.Cache+S.CB.OP
* cmp #S.CB.OP.XOR
beq VLINE.MONO.XOR
lda CB.Cache+S.CB.COLOR
bne VLINE.MONO.WHITE
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VLINE.MONO.BLACK
.1 lda BASEL,y
adc ZPTmpByte
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sta ZPBasePtr
lda BASEH,y
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sta ZPBasePtr+1
lda (ZPBasePtr)
and Mono.NMasks,x
sta (ZPBasePtr)
cpy CB.Cache+S.CB.Y2
iny
bcc .1
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rts
VLINE.MONO.WHITE
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lda #$1D ORA abs,x
.HS 2C BIT ABS
VLINE.MONO.XOR
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lda #$5D EOR abs,x
sta .2
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.1 lda BASEL,y
adc ZPTmpByte
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sta ZPBasePtr
lda BASEH,y
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sta ZPBasePtr+1
lda (ZPBasePtr)
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.2 eor Mono.Masks,x SELF MODIFIED
sta (ZPBasePtr)
cpy CB.Cache+S.CB.Y2
iny
bcc .1
rts
VLINE.C16 lda CB.Cache+S.CB.X1
lsr CB.Cache+S.CB.X1+1 divide by 4
ror
lsr CB.Cache+S.CB.X1+1
ror
tay Y=X/4 (range 0->139)
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ldx CB.Cache+S.CB.Y1
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.1 phy
phx
jsr SETPIXEL.C16.YX
plx
ply
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cpy CB.Cache+S.CB.Y2
iny
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bcc .1
rts
*--------------------------------------
MAN
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SAVE usr/src/drv/dhgr.drv.s.line
LOAD usr/src/drv/dhgr.drv.s
ASM