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  • XGA memory architecture [G200 for XGA /A]

    From Louis Ohland@ohland@charter.net to comp.sys.ibm.ps2.hardware on Wed Oct 2 10:47:09 2024
    From Newsgroup: comp.sys.ibm.ps2.hardware

    INMOS XGA G200 Datasheet page 32

    Support for multiple VRAM banks

    The IMS G200 now supports up to 4 MBytes of VRAM consisting of devices
    using nine row and nine column address lines. The VRAM internal
    architecture must consist of a number of 512 x 512 (256 KBytes) memory
    arrays, typically 256K x 4, since the IMS G200 supports a 9-bit
    multiplexed VRAM address bus. Care should be taken not to exceed the IMS
    G200 pin output loading characteristics, given in Table 21.25, when
    connecting multiple VRAM devices.
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