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Added few comments and a few new constants

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jespergravgaard 2018-08-23 00:35:19 +02:00
parent 63badba136
commit 6dca0ada51
1 changed files with 7 additions and 0 deletions
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src/test/java/dk/camelot64/kickc/test/kc/c64.kc
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@ -55,13 +55,20 @@ const byte VIC_CSEL = %00001000;
const byte* D018 = $d018;
const byte* VIC_MEMORY = $d018;
const byte* LIGHTPEN_X = $d013;
const byte* LIGHTPEN_Y = $d014;
// VIC II IRQ Status Register
const byte* IRQ_STATUS = $d019;
// VIC II IRQ Enable Register
const byte* IRQ_ENABLE = $d01a;
// Bits for the IRQ Status/Enable Registers
const byte IRQ_RASTER = %00000001;
const byte IRQ_COLLISION_BG = %00000010;
const byte IRQ_COLLISION_SPRITE = %00000100;
const byte IRQ_LIGHTPEN = %00001000;
// Color Ram
const byte* COLS = $d800;
// CIA#1 Port A: keyboard matrix columns and joystick #2