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Last Post 10 Nov 2003 03:14 PM by  Anonymous
LH75401-10 2MB SRAM Hardware Upgrade.
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--
10 Nov 2003 03:14 PM
    The LH75401-10 card engine can support up to 2MB SRAM (stock is 512 KB). Changes in Hardware and Software must be made to account for this.

    Hardware:
    If you add additional SRAM to the card engine please refer to the LH75401-10 card engine schematics (pg. 4) for memory location and jumper setting changes.

    For Example, if you want to upgrade to 2MB:
    1. Populate U5, U6, U20, U21 with 512 KB SRAM, (Part number
    IDT71V416SA15PH)
    2. change JP1 and JP2 jumper settings to both '+', (as shown in 'SRAM
    DENSITY CONFIGURATION BITS ' Table on pg. 4 of schematics)

    Software:
    The Bolo/Lolo that shipped with the LH75401-10 Card engine is designed to support 512KB SRAM. It will not support the additional SRAM.

    Configure your software to account for the additional SRAM.

    Regards,
    Andrew Wawra
    Logic Product Development
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