Document Title: [MarbleMadnessMap.html (html file)]
Atari System 1
Video Microprocessor Memory Map
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adr r/w d15 ---------- d0
Program ROM 000000-087fff r/w dddddddd dddddddd
Program RAM 400000-401fff dddddddd dddddddd
Playfield Horizontal Scroll 800000 w d dddddddd
Playfield Vertical Scroll 820000 w d dddddddd
Playfield Special Priority Color 840000 r dddddddd
Sound Processor Reset 860000 w d
Trak-Ball Test w d
Motion Object Parameter Buffer Select w d d
Playfield ROM Bank Select w d
Trak-Ball Resolution and Test LED w d
Alphanumerics ROM Bank Select w d
Watchdog 880000 w
Vertical Blank IRQ Acknowledge 8a0000 w
Unlock 8c0000 w
Cartridge External 900000-9fffff r/w dddddddd dddddddd
Playfield RAM a00000-a01fff r/w dddddddd dddddddd
Motion Object Vertical Position a02000-a0207f r/w dddddddd dddddddd
Motion Object Picture a02080-a020ff r/w dddddddd dddddddd
Motion Object Horizontal Position a02100-a0217f r/w dddddddd dddddddd
Motion Object Link a02180-a021ff r/w dddddddd dddddddd
Motion Object Vertical Position a02200-a0227f r/w dddddddd dddddddd
Motion Object Picture a02280-a022ff r/w dddddddd dddddddd
Motion Object Horizontal Postion a02300-a023ff r/w dddddddd dddddddd
Motion Object Link a02380-a023ff r/w dddddddd dddddddd
Motion Object Vertical Postion a02e00-a02e7f r/w dddddddd dddddddd
Motion Object Picture a02e80-a02eff r/w dddddddd dddddddd
Motion Object Horizontal Position a02f00-a02f7f r/w dddddddd dddddddd
Motion Object Link a02f80-a02fff r/w dddddddd dddddddd
Alphanumerics RAM a03000-a03fff r/w dddddddd dddddddd
Alphanumerics Color RAM b00000-b001ff r/w dddddddd dddddddd
Motion Object Color RAM b00200-b003ff r/w dddddddd dddddddd
Playfield Color RAM b00400-b005ff r/w dddddddd dddddddd
Translucent Color RAM b00600-b0061f r/w dddddddd dddddddd
EEPROM f00000-f00fff r dddddddd
Trak-Ball f20000-f20006 r dddddddd
Analog Joystick f40000-f4000e r dddddddd
Analog Joystick IRQ Disable f40010 r
Output Buffer Full (@ FE0000) f60000 r d
Self-Test r d
Switch Input r d
Vertical Blank r d
Switch Input r d
Switch Input r d
Switch Input r d
Switch Input r d
Read Sound Processor (6502) fc0000 r dddddddd
Write Sound Processor (6502) fe0000 w dddddddd
I/O and Sound Microprocessor Memory Map
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adr a15 ------------ a0 r/w d7 -- d0
Program RAM 0000-0fff 0000 aaaa aaaa aaaa r/w dddddddd
Cartridge External 1000-1fff 0001 aaaa aaaa aaaa r/w dddddddd
Music 1800-1801 0001 1000 0000 000a r/w dddddddd
Read 68000 Port 1810 0001 1000 0001 0000 r dddddddd
Write 68000 Port 1810 0001 1000 0001 0000 w dddddddd
Self-Test 1820 0001 1000 0010 0000 r d
Buffer Output full (@ 1810) d
Data Available (@ 1810) d
Auxiliary Coin Switch d
Left Coin Switch d
Right Coin Switch d
Music Reset 1820 0001 1000 0010 0000 w d
Light-Emitting Diode 1824 0001 1000 0010 0100 w d
Light-Emitting Diode 1825 0001 1000 0010 0101 w d
Right Coin Counter 1826 0001 1000 0010 0110 w d
Left Coin Counter 1827 0001 1000 0010 0111 w d
Sound Effects 1870-187f 0001 1000 0111 aaaa r/w dddddddd
Program ROM 4000-ffff aaaa aaaa aaaa aaaa r dddddddd
