mirror of
https://github.com/A2osX/A2osX.git
synced 2024-06-07 17:29:34 +00:00
253 lines
5.5 KiB
Plaintext
253 lines
5.5 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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LOMEM $A00
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INC 1
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AUTO 6
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.LIST OFF
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*--------------------------------------
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LBUF.SetBounds1YA
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jsr DIVMOD7YA A=DIV, X=MOD
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sta LBUF.C1
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lda C1.MASK,x
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sta LBUF.C1.MASK
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lda C1.DATA,x
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sta LBUF.C1.DATA
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rts
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*--------------------------------------
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LBUF.SetBounds2YA
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jsr DIVMOD7YA A=DIV, X=MOD
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sta LBUF.C2
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cmp LBUF.C1 C1=C2, go combine in C1
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beq .1
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lda C2.MASK,x
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sta LBUF.C2.MASK
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lda C2.DATA,x
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sta LBUF.C2.DATA
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rts
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.1 lda C1.MASK,x
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and C2.MASK,x
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sta LBUF.C1.MASK
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lda C1.DATA,x
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and C2.DATA,x
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sta LBUF.C2.DATA
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rts
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*--------------------------------------
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LBUF.DrawAtY lda BASEL,y setup line Base Ptr
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sta ZPBasePtr
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lda BASEH,y
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sta ZPBasePtr+1
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lda CB.Cache+S.CB.OP
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bit #S.CB.OP.RESTORE
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bne .8
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bit #S.CB.OP.SAVE
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beq .1
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lda CB.Cache+S.CB.OP
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.1 and #$f
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tax
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jmp (J.LBUF.DrawAtY,x)
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.8 rts
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*--------------------------------------
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LBUF.DrawAtY.XOR
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ldx LBUF.C1 x C1->C2
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ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C1
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and LBUF.C1.MASK clear ONLY bits starting at X1 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C1.DATA set ONLY bits starting at X1 mod 7
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ora GBYTE
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eor (ZPBasePtr),y
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sta (ZPBasePtr),y update screen
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inx
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cpx LBUF.C2
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beq .2 C1=C2, go setup C2
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bcs .8 C1+1 > C2, we are done...
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.1 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda LBUF.DATA,x
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eor (ZPBasePtr),y
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sta (ZPBasePtr),y
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inx
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cpx LBUF.C2
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bne .1
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.2 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C2
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and LBUF.C2.MASK clear ONLY bits ending at X2 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C2.DATA set ONLY bits ending at X2 mod 7
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ora GBYTE
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eor (ZPBasePtr),y
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sta (ZPBasePtr),y update screen
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.8 rts
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*--------------------------------------
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LBUF.DrawAtY.SET
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ldx LBUF.C1 x C1->C2
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ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y data for Get C1
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and LBUF.C1.MASK clear ONLY bits starting at X1 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C1.DATA set ONLY bits starting at X1 mod 7
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ora GBYTE
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sta (ZPBasePtr),y update screen
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inx
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cpx LBUF.C2
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beq .2 C1=C2, go setup C2
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bcs .8 C1+1 > C2, we are done...
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.1 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda LBUF.DATA,x set all bytes between C1+1 & C2-1
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sta (ZPBasePtr),y
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inx
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cpx LBUF.C2
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bne .1
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.2 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C2
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and LBUF.C2.MASK clear ONLY bits ending at X2 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C2.DATA set ONLY bits ending at X2 mod 7
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ora GBYTE
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sta (ZPBasePtr),y update screen
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.8 rts
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*--------------------------------------
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LBUF.DrawAtY.ORA
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ldx LBUF.C1 x C1->C2
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ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C1
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and LBUF.C1.MASK clear ONLY bits starting at X1 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C1.DATA set ONLY bits starting at X1 mod 7
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ora GBYTE
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ora (ZPBasePtr),y
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sta (ZPBasePtr),y update screen
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inx
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cpx LBUF.C2
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beq .2 C1=C2, go setup C2
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bcs .8 C1+1 > C2, we are done...
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.1 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda LBUF.DATA,x set all bytes between C1+1 & C2-1
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ora (ZPBasePtr),y
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sta (ZPBasePtr),y
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inx
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cpx LBUF.C2
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bne .1
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.2 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C2
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and LBUF.C2.MASK clear ONLY bits ending at X2 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C2.DATA set ONLY bits ending at X2 mod 7
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ora GBYTE
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ora (ZPBasePtr),y
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sta (ZPBasePtr),y update screen
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.8 rts
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*--------------------------------------
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LBUF.DrawAtY.AND
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ldx LBUF.C1 x C1->C2
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ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C1
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and LBUF.C1.MASK clear ONLY bits starting at X1 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C1.DATA set ONLY bits starting at X1 mod 7
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ora GBYTE
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and (ZPBasePtr),y
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sta (ZPBasePtr),y update screen
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inx
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cpx LBUF.C2
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beq .2 C1=C2, go setup C2
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bcs .8 C1+1 > C2, we are done...
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.1 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda LBUF.DATA,x set all bytes between C1+1 & C2-1
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and (ZPBasePtr),y
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sta (ZPBasePtr),y
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inx
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cpx LBUF.C2
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bne .1
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.2 ldy COL.BANK,x
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sta $C000,y
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ldy COL.OFS,x
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lda (ZPBasePtr),y Get C2
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and LBUF.C2.MASK clear ONLY bits ending at X2 mod 7
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sta GBYTE
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lda LBUF.DATA,x get DATA bits
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and LBUF.C2.DATA set ONLY bits ending at X2 mod 7
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ora GBYTE
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and (ZPBasePtr),y
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sta (ZPBasePtr),y update screen
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.8 rts
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/DRV/DHGR.DRV.S.LBUF
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LOAD /A2OSX.SRC/DRV/DHGR.DRV.S
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ASM
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