mirror of https://github.com/A2osX/A2osX.git
183 lines
3.7 KiB
Plaintext
183 lines
3.7 KiB
Plaintext
NEW
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AUTO 3,1
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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
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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 C2.MASK,x C1=C2, go combine in C1
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tsb LBUF.C1.MASK
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lda C2.DATA,x
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tsb LBUF.C1.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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and #$F
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tax
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jmp (J.LBUF.DrawAtY,x)
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*--------------------------------------
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LBUF.DrawAtY.SET
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LBUF.DrawAtY.AND.SET
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ldx LBUF.C1 x C1->C2
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>X2PageY
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lda (ZPBasePtr),y Clear screen at C1
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and LBUF.C1.MASK with MASK bits
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sta ZPTmpByte
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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 ZPTmpByte ora with screen bits
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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 >X2PageY
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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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bcc .1
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.2 >X2PageY
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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 ZPTmpByte
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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 ZPTmpByte
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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.XOR
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LBUF.DrawAtY.AND.XOR
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lda #$51 EOR (Indirect),Y
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bra LBUF.DrawAtY.XXX
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*--------------------------------------
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LBUF.DrawAtY.ORA
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lda #$11 ORA (Indirect),Y
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LBUF.DrawAtY.XXX
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sta .10
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sta .20
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sta .30
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ldx LBUF.C1 x C1->C2
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>X2PageY
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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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.10 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 >X2PageY
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lda LBUF.DATA,x set all bytes between C1+1 & C2-1
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.20 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 >X2PageY
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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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.30 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.AND.ORA
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ldx LBUF.C1 x C1->C2
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>X2PageY
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lda LBUF.MASK,x get MASK bits
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ora LBUF.C1.MASK clear ONLY bits starting at X1 mod 7
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and (ZPBasePtr),y
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sta ZPTmpByte
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lda LBUF.DATA,x
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and LBUF.C1.DATA
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ora ZPTmpByte
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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 >X2PageY
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lda (ZPBasePtr),y
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and LBUF.MASK,x
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ora LBUF.DATA,x set all bytes between C1+1 & C2-1
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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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bne .1
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.2 >X2PageY
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lda LBUF.MASK,x get MASK bits
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ora LBUF.C2.MASK
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and (ZPBasePtr),y
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sta ZPTmpByte
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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 ZPTmpByte
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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 usr/src/drv/dhgr.drv.s.lbuf
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LOAD usr/src/drv/dhgr.drv.s
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ASM
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