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A small hint to get me started

Discussion in 'Electronic Basics' started by Jacky, Aug 13, 2007.

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  1. Jacky

    Jacky Guest

    Hi,
    I have a project to do for my client.
    But don't know how to get started
    My client gave us a 256Bytes dual port RAM (ISA Bus),(connected to PC with a
    PCI Card)
    Which are accessed simulaneously by the monitor PC and a FMX board
    These 256 locations are sparse and no additional RAM is to be added
    My boss wants both the device read and write to the RAM(PC and FMX)
    simultanously. This RAM Board has no controller so that I had to write a
    protocol. This is a real time project and we need to write driver for it.
    Could anyone think of anything on starting to write this driver?
    I had thought about
    1) A Memory Control Layer to manage RAM Access
    2) Mod the RAM card
    3) a protocol that limit either one side to access the RAM system while the
    other side waits for the other device to release the bus and flip-flopping
    the roles between these devices....
    Any commets/thoughts will be greatly appreciated!
    Thanks
     
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