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Thread: Project: Micro 8088 - Chipset-based 8088 XT compatible processor board

  1. #21

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    Id rather have a vortex86dx, a 1.5ghz 486dx! that would be sweet. I keep an eye on ebay, sometimes the SX version of the vortex shows up, the dx ones are mega expensive.

  2. #22
    Join Date
    Mar 2016
    Location
    Georgia, USA
    Posts
    315

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    Quote Originally Posted by BloodyCactus View Post
    Id rather have a vortex86dx, a 1.5ghz 486dx! that would be sweet. I keep an eye on ebay, sometimes the SX version of the vortex shows up, the dx ones are mega expensive.
    Hey Sergey, I've flashed 0.9.4 of your micro 8088 bios and I keep getting this error on boot:

    IOCHK NMI dected. Type 'i' to ignore IOCHK NMIs, or 'r' to reboot.

    Hitting 'i' just repeats the message.

  3. #23
    Join Date
    Jul 2010
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    Silicon Forest, Oregon, USA
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    Quote Originally Posted by keenerb View Post
    Hey Sergey, I've flashed 0.9.4 of your micro 8088 bios and I keep getting this error on boot:

    IOCHK NMI dected. Type 'i' to ignore IOCHK NMIs, or 'r' to reboot.

    Hitting 'i' just repeats the message.
    It looks that something in your system keeps /IOCHK signal low. Just to be sure measure voltage on that signal (pin A1 on ISA bus - the rightmost on the component side of an ISA card).

    In 0.9.4 I enabled NMIs, that we're accidently disabled in previous BIOS versions... But you shouldn't be getting NMIs in a healthy system.

    Thanks,
    Sergey

  4. #24
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    Mar 2016
    Location
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    Quote Originally Posted by sergey View Post
    It looks that something in your system keeps /IOCHK signal low. Just to be sure measure voltage on that signal (pin A1 on ISA bus - the rightmost on the component side of an ISA card).

    In 0.9.4 I enabled NMIs, that we're accidently disabled in previous BIOS versions... But you shouldn't be getting NMIs in a healthy system.

    Thanks,
    Sergey
    I measured 5v across A1 and GND (B1).

    IOCHK VOLTAGE.jpg

    PINS.jpg

    I don't THINK I should be seeing an NMI in this case.

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