GSCats/equates.s

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2017-07-29 21:47:17 +00:00
TEXTCOLOR = $e0c022
NEWVIDEO = $e0c029
BORDERCOLOR = $e0c034
CLOCKCTL = $e0c034
SHADOW = $e0c035
STACKCTL = $e0c068
KBD = $e0c000
KBDSTROBE = $e0c010
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COUT = $fded
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VRAM = $e12000
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SHADOWVRAM = $012000
VRAMBANK = $e10000
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SHADOWVRAMBANK = $010000
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PRODOS = $bf00 ; MLI entry point
PRODOSRETURN = $300 ; Indirect jump to get back to ProDOS from any bank
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; Zero page locations we use (unused by Monitor, Applesoft, or ProDOS)
PARAM0 = $06
PARAM1 = $07
PARAM2 = $08
PARAM3 = $09
PARAML0 = $06 ; 16-bit versions of params
PARAML1 = $08
SCRATCH0 = $19
SCRATCH1 = $1a
SCRATCHL = $19 ; 16-bit version of scratch
SCRATCHL2 = $67 ; Second 16-bit scratch
PARAM24 = $67 ; 24-bit param (This is almost certainly messing up AppleSoft, but meh)
2017-12-26 05:41:09 +00:00
CACHEPTR = $6A ; General purpose cache pointer (This is almost certainly messing up AppleSoft, but meh)
CACHEDATA = $6C ; General purpose cache data (This is almost certainly messing up AppleSoft, but meh)
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leftScreenEdge = $6E ; Reserved for leftScreenEdge (This is almost certainly messing up AppleSoft, but meh)
STACKPTR = $70 ; Cache for stack pointer in fast graphics
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SHADOWREGISTER = $72 ; Cache for shadow register in fast graphics
STACKREGISTER = $73 ; Cache for stack register in fast graphics
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lastCompiledTerrainY = $75 ; The highest Y value that the compiled renderer must handle
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; Terrain constants
TERRAINWIDTH = 640 ; In pixels
MAXTERRAINHEIGHT = 100 ; In pixels
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COMPILEDTERRAINROW = TERRAINWIDTH/4+4 ; In words, +4 to make room for clipping jump at end of row
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VISIBLETERRAINWIDTH = TERRAINWIDTH/4 ; In words- width minus jump return padding
VISIBLETERRAINWINDOW = 80 ; In words
MAXSPANSPERROW = 15
SPANROWBYTES = MAXSPANSPERROW*2 + 2 ; In bytes
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CLIPPEDTERRAINSTACK = $3fff ; Location of stack where clipped terrain data lives
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; Terrain data, stored as height values 2 pixels wide (bytes)
terrainDataFar = $02f500
terrainData = $f500
; .repeat TERRAINWIDTH/2
; .word 0
; .endrepeat
terrainDataEnd = terrainData + (TERRAINWIDTH/2 * 2)