Tempest Memory Map D D D D D D D D Hex Address 7 6 5 4 3 2 1 0 Function -------------------------------------------------------------------------- 0000-07FF | D D D D D D D D | R/W | Program RAM (2K) 0800-080F | D D D D | W | Color RAM | | | 0C00 | D | R | 3 KHZ 0C00 | D | R | Vector Generator Halt 0C00 | D | R | Diagnostic Step 0C00 | D | R | Self Test Switch 0C00 | D | R | Slam Switch 0C00 | D | R | Left Coin Switch 0C00 | D | R | Center Coin Switch 0C00 | D | R | Right Coin Switch | | | 0D00 | D D D D D D D D | R | Option Switches 0E00 | D D D D D D D D | R | Option Switches | | | 2000-2FFF | D D D D D D D D | R/W | Vector RAM (4K) 3000-3FFF | D D D D D D D D | R | Vector ROM (4K) | | | 4000 | D | W | Invert Y 4000 | D | W | Invert X 4000 | D | W | Left Coin Counter 4000 | D | W | Center Coin Counter 4000 | D | W | Right Coin Counter | | | 4800 | | W | Vector Generator Go 5000 | | W | Watchdog Clear 5800 | | W | Vector Generator Reset | | | 6000-603F | D D D D D D D D | W | EAROM Write 6040 | D D D D D D D D | W | EAROM Control 6040 | D | R | Mathbox Status 6050 | D D D D D D D D | R | EAROM Read | | | 6060 | D D D D D D D D | R | Mathbox Read 6070 | D D D D D D D D | R | Mathbox Read 6080-609F | D D D D D D D D | W | Mathbox Start | | | 60C0-60CF | D D D D D D D D | R/W | Pokey 1 60D0-60DF | D D D D D D D D | R/W | Pokey 2 | | | 60E0 | D | R | Flip 60E0 | D | R | Two Player Start 60E0 | D | R | One Player Start | | | 9000-DFFF | D D D D D D D D | R | Program ROM (20K) -------------------------------------------------------------------------------