• Catalogue page

    Keith • 03/14/2026 at 14:46 • 0 comments

    SPVGA

    The SPVGA is a high resolution Video Interface: STEbus slave interface. Graphics Controller, compatible with the Video Graphics Array (VGA) standard.

    It provides standard VGA and enhanced Super-VGA colour modes for systems based on PC, -AT or PS/2 compatible STEbus CPUs.

    Using Arcoms SPVGASOFT graphics software package, the SPVGA can also be used as a low cost high performance graphics board in OS-9 systems and 80188 ROM-based target systems. Implementing all registers data paths and functionality of the VGA, (including features not currently used) the board can be supplied with up to 1Mbyte of Video DRAM.

    Display modes are 100% compatible with IBM VGA, EGA, CGA and Hercules standard, with an on-board 32Kbyte BIOS EPROM to facilitate upgrades. Two paged EPROMs allow systems designers to implement up to 512Kbytes of ROMdisk, using Arcoms DISKPROM software package. The board interfaces standard VGA, SVGA or multi-frequency type analogue monitors. Monochrome displays to resolutions of 1024 x 768 or 800 x 600 can additionally be generated, with 132-column text modes of up to 60 rows.

    RAM/ROM

    Silicon disk support for ROM-based PC systems

    Interface: STEbus slave interface.

    Power consumption: Typ 1.7A @5V

    Features:

    • Extended VGA modes with super high resolutions
    • 1024 x 768 in 256 colours (1Mb DRAM)
    • 800 x 600 in 256 colours (512Kb DRAM)
    • 800 x 600 in 16 colours (256 Kb DRAM)
    • VGA, EGA, CGA, MDA and Hercules compatible
    • Up to 512Kb of paged EPROM for ROMdisks
    • Automatic monitor type sensing

    Ordering information:

    The SPVGA is available in three versions:

    SPVGAH1 VGA graphics board with   1 Mb DRAM
SPVGAH  VGA graphics board with 512 Kb DRAM
SPVGA   VGA graphics board with 256 Kb DRAM