Changes between Version 1 and Version 2 of geniuspc


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Timestamp:
May 12, 2012, 10:22:22 PM (12 years ago)
Author:
pulkomandy
Comment:

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  • geniuspc

    v1 v2  
    11The Genius PC is a home computer from VTech. Released in the late 90s, it is one of the last microcomputers.
    22
    3 Hardware :
     3= Hardware : =
    44 * Motorola MC68EC000, 16-bit external databus, 32MHz
    55 * 256K of RAM
    … …  
    77 * Mass storage : 128KB flash memory - AM29F010
    88 * Cartridge port, apparently on memory bus with system ROM and storage flash. The french system comes with cartridges only containing straps, likely shorting some pins enable extra features... The german version seems to have extra flash memory or maybe ROM ?
     9
     10== Other chips ==
     11 * BH7236AF : Video encoder (PAL/NTSC + RGB output). On french motherboard RGB is used, composite is not wired.
     12 * LMT324 : LM324, used as audio amplifier
     13 * C807U : Toshiba microcontroller. Handles mouse and keyboard scanning.
     14 * VTech ZKAM9742 : of course a datasheet of this one woumd make things easier.
    915
    1016All memory is only addressable on an 8bit databus, but goes through the VTech custom chip ZKAM9742, which likely converts 16/8bit access.