mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-07-03 01:29:39 +00:00
141 lines
2.0 KiB
ArmAsm
141 lines
2.0 KiB
ArmAsm
; VGI Rectangle
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; VGI Rectangle test
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COLOR_MODE = TEMP0
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OTHER_MASK = TEMP1
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XRUN = TEMP2
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; slow
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;=================================
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; Simple Rectangle
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;=================================
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VGI_RCOLOR = P0
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VGI_RX1 = P1
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VGI_RY1 = P2
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VGI_RXRUN = P3
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VGI_RYRUN = P4
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vgi_simple_rectangle:
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simple_rectangle_loop:
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lda VGI_RCOLOR
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asl ; nibble swap by david galloway
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adc #$80
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rol
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asl
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adc #$80
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rol
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sta VGI_RCOLOR
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and #$f
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tax
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lda COLORTBL,X
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sta HGR_COLOR
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ldx VGI_RX1 ; X1 into X
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lda VGI_RY1 ; Y1 into A
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ldy #0 ; always 0
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jsr HPOSN ; (Y,X),(A) (values stores in HGRX,XH,Y)
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lda VGI_RXRUN ; XRUN into A
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ldx #0 ; always 0
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ldy #0 ; relative Y is 0
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jsr HLINRL ; (X,A),(Y)
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inc VGI_RY1
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dec VGI_RYRUN
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bne simple_rectangle_loop
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jmp vgi_loop
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;=================================
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; Dithered Rectangle
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;=================================
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; VGI_RCOLOR = P0
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; VGI_RX1 = P1
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; VGI_RY1 = P2
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; VGI_RXRUN = P3
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; VGI_RYRUN = P4
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VGI_RCOLOR2 = P5
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vgi_dithered_rectangle:
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dithered_rectangle_loop:
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lda COUNT
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and #$1
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beq even_color
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odd_color:
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lda VGI_RCOLOR
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jmp save_color
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even_color:
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lda VGI_RCOLOR2
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save_color:
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sta HGR_COLOR
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inc COUNT
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ldx VGI_RX1 ; X1 into X
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lda VGI_RY1 ; Y1 into A
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ldy #0 ; always 0
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jsr HPOSN ; (Y,X),(A) (values stores in HGRX,XH,Y)
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lda VGI_RXRUN ; XRUN into A
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ldx #0 ; always 0
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ldy #0 ; relative Y is 0
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jsr HLINRL ; (X,A),(Y)
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inc VGI_RY1
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dec VGI_RYRUN
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bne dithered_rectangle_loop
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jmp vgi_loop
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;=================================
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; Vertical Striped Rectangle
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;=================================
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; VGI_RCOLOR = P0
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; VGI_RX1 = P1
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; VGI_RY1 = P2
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; VGI_RXRUN = P3
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; VGI_RYRUN = P4
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; VGI_RCOLOR2 = P5
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vgi_vstripe_rectangle:
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lda #128
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sta COLOR_MODE
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lda #0
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sta COUNT
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jmp simple_rectangle_loop
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;=====================
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; make /7 %7 tables
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;=====================
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vgi_init:
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vgi_make_tables:
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rts
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