38 lines
1.0 KiB
OpenEdge ABL
38 lines
1.0 KiB
OpenEdge ABL
BACKGROUND_UPDATE_COUNT equ $1
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SCREEN_WIDTH equ 320
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SCREEN_HEIGHT equ 256
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SCREEN_WIDTH_BYTES equ (SCREEN_WIDTH/8)
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SCREEN_WIDTH_WORDS equ SCREEN_WIDTH_BYTES/2
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BITPLANE_WIDTH equ 352
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BITPLANE_WIDTH_BYTES equ BITPLANE_WIDTH/8
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BITPLANE_WIDTH_WORDS equ BITPLANE_WIDTH_BYTES/2
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TILEMAP_WIDTH equ 320
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TILEMAP_WIDTH_BYTES equ TILEMAP_WIDTH/8
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TILEMAP_WIDTH_WORDS equ TILEMAP_WIDTH_BYTES/2
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if NUM_COLORS==64
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SCREEN_BIT_DEPTH equ 6
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endif
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if NUM_COLORS==32
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SCREEN_BIT_DEPTH equ 5
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endif
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if NUM_COLORS==16
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SCREEN_BIT_DEPTH equ 4
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endif
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if NUM_COLORS==8
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SCREEN_BIT_DEPTH equ 3
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endif
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if NUM_COLORS==4
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SCREEN_BIT_DEPTH equ 2
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endif
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if NUM_COLORS==2
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SCREEN_BIT_DEPTH equ 1
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endif
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SCREEN_RES equ 8 ; 8=lo resolution, 4=hi resolution
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RASTER_X_START equ $81 ; hard coded coordinates from hardware manual
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RASTER_Y_START equ $2c
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RASTER_X_STOP equ RASTER_X_START+SCREEN_WIDTH
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RASTER_Y_STOP equ RASTER_Y_START+256
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IMAGESIZE equ BITPLANE_WIDTH_BYTES*SCREEN_BIT_DEPTH*SCREEN_HEIGHT |