[Jan/23/98]

Return of the Jedi by Atari (1983)

All files except 11T were from 128 or 256 VTI mask ROMS.
11T was some unmarked SEEQ device. Guessed at 2864.
Verified as 2864 also.



[MAME]

Atari Return of the Jedi

Memory map

****************************************************************************

	========================================================================
	CPU #1
	========================================================================
	0000-07FF   R/W   xxxxxxxx    Z-page Working RAM
	0800-08FF   R/W   xxxxxxxx    NVRAM
	0C00        R     xxxx-xxx    Switch inputs #1
	            R     x-------       (right coin)
	            R     -x------       (left coin)
	            R     --x-----       (aux coin)
	            R     ---x----       (self test)
	            R     -----x--       (left thumb switch)
	            R     ------x-       (fire switches)
	            R     -------x       (right thumb switch)
	0C01        R     xxx--x--    Communications
	            R     x-------       (VBLANK)
                R     -x------       (sound CPU communications latch full flag)
                R     --x-----       (sound CPU acknowledge latch flag)
                R     -----x--       (slam switch)
    1400        R     xxxxxxxx    Sound acknowledge latch
    1800        R     xxxxxxxx    Read A/D conversion
    1C00          W   --------    Enable NVRAM
    1C01          W   --------    Disable NVRAM
    1C80          W   --------    Start A/D conversion (horizontal)
    1C82          W   --------    Start A/D conversion (vertical)
    1D00          W   --------    NVRAM store
    1D80          W   --------    Watchdog clear
    1E00          W   --------    Interrupt acknowledge
    1E80          W   x-------    Left coin counter
    1E81          W   x-------    Right coin counter
    1E82          W   x-------    LED 1 (not used)
    1E83          W   x-------    LED 2 (not used)
    1E84          W   x-------    Alphanumerics bank select
    1E86          W   x-------    Sound CPU reset
    1E87          W   x-------    Video off
    1F00          W   xxxxxxxx    Sound communications latch
    1F80          W   -----xxx    Program ROM bank select
    2000-23FF   R/W   xxxxxxxx    Scrolling playfield (low 8 bits)
    2400-27FF   R/W   ----xxxx    Scrolling playfield (upper 4 bits)
    2800-2BFF   R/W   xxxxxxxx    Color RAM low
                R/W   -----xxx       (blue)
                R/W   --xxx---       (green)
                R/W   xx------       (red LSBs)
    2C00-2FFF   R/W   ----xxxx    Color RAM high
                R/W   -------x       (red MSB)
                R/W   ----xxx-       (intensity)
    3000-37BF   R/W   xxxxxxxx    Alphanumerics RAM
    37C0-37EF   R/W   xxxxxxxx    Motion object picture
    3800-382F   R/W   -xxxxxxx    Motion object flags
                R/W   -x---xx-       (picture bank)
                R/W   --x-----       (vertical flip)
                R/W   ---x----       (horizontal flip)
                R/W   ----x---       (32 pixels tall)
                R/W   -------x       (X position MSB)
    3840-386F   R/W   xxxxxxxx       (Y position)
    38C0-38EF   R/W   xxxxxxxx       (X position LSBs)
    3C00-3C01     W   xxxxxxxx    Scrolling playfield vertical position
    3D00-3D01     W   xxxxxxxx    Scrolling playfield horizontal position
    3E00-3FFF     W   xxxxxxxx    PIXI graphics expander RAM
    4000-7FFF   R     xxxxxxxx    Banked program ROM
    8000-FFFF   R     xxxxxxxx    Fixed program ROM
	========================================================================
	Interrupts:
		NMI not connected
		IRQ generated by 32V
	========================================================================


	========================================================================
	CPU #2
	========================================================================
	0000-07FF   R/W   xxxxxxxx    Z-page working RAM
	0800-083F   R/W   xxxxxxxx    Custom I/O
	1000          W   --------    Interrupt acknowledge
	1100          W   xxxxxxxx    Speech data
	1200          W   --------    Speech write strobe on
	1300          W   --------    Speech write strobe off
	1400          W   xxxxxxxx    Main CPU acknowledge latch
	1500          W   -------x    Speech chip reset
	1800        R     xxxxxxxx    Main CPU communication latch
	1C00        R     x-------    Speech chip ready
	1C01        R     xx------    Communications
	            R     x-------       (sound CPU communication latch full flag)
	            R     -x------       (sound CPU acknowledge latch full flag)
	8000-FFFF   R     xxxxxxxx    Program ROM
	========================================================================
	Interrupts:
		NMI not connected
		IRQ generated by 32V
	========================================================================

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