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79 lines
1.2 KiB
ArmAsm
79 lines
1.2 KiB
ArmAsm
;
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; Ullrich von Bassewitz, 22.06.2002
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;
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; Emulation for tgi_bar.
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;
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.include "tgi-kernel.inc"
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.importzp ptr1, ptr2, ptr3, ptr4
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.export tgi_emu_bar
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tgi_emu_bar:
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lda ptr4
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sta Y2
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lda ptr4+1
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sta Y2+1
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lda ptr3
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sta X2
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lda ptr3+1
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sta X2+1
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lda ptr2
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sta ptr4
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sta Y1
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lda ptr2+1
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sta ptr4+1
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sta Y1+1
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lda ptr1
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sta X1
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lda ptr1+1
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sta X1+1
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@L1: jsr tgi_horline
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lda Y1
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cmp Y2
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bne @L2
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lda Y1
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cmp Y2
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beq @L4
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@L2: inc Y1
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bne @L3
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inc Y1+1
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@L3: lda Y1
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sta ptr2
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lda Y1+1
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sta ptr2+1
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lda X1
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sta ptr1
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lda X1+1
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sta ptr1+1
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lda X2
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sta ptr3
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lda X2+1
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sta ptr3+1
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jmp @L1
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@L4: rts
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;-----------------------------------------------------------------------------
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; Data
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.bss
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DY: .res 2
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X1: .res 2
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X2: .res 2
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Y1: .res 2
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Y2: .res 2
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