[May/21/98]

Jack Rabbit
Zaccaria 1983

It is four boards, rom on top, cpu & snd next
to each other, and graphics on the bottom

snd - 2)6802's, 2)6821's, TMS5200, 2)8910's
cpu - z80, 2k ram, 1st pgm prom, 8255

switches:
5I 3,6,7 on
4I 2,3 on
3I all off



Jack Rabbit memory map (preliminary)

0000-5fff ROM
6000-63ff Video RAM
6400-67ff Color RAM
7000-77ff RAM
8000-dfff ROM

read:
6400-6406 protection
6c00-6c06 protection
6c00      COIN
6e00      dip switches (three ports multiplexed)
7800      IN0
7801      IN1
7802      IN2
7c00      watchdog reset?

write:
6800-683f even addresses = column [row] scroll; odd addresses = column [row] color?
6840-685f sprites
6881-68bc sprites
6c02      ?
6c07      NMI enable
7802      e0/d0/b0 select port which will appear at 6e00

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