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    Scali

    According to the IBM documentation for the BIOS,...

    According to the IBM documentation for the BIOS, 400h-4FFh is reserved.
    However, 4F0h-4FFh is 'reserved as intra-application communication area for any application'.
    That would imply that you could...

    Scali Today, 03:24 AM Go to last post
    Plasma

    The system BIOS might not use it, but that...

    The system BIOS might not use it, but that doesn't mean an expansion BIOS won't (hard drive, video, etc). Are you really that hard up for memory? I would start at a known safe address like 70:00.

    Plasma Today, 03:17 AM Go to last post
    Ruud

    BIOS memory use

    Hello,

    Essential information: I'm writing a self booting program so I won't run MS-DOS or any other DOS.

    I know that the PC-XT BIOS uses the memory from 0000:0400h (serial devices) up to and...

    Ruud Today, 02:55 AM Go to last post
    iz8dwf

    Business with these retro-things? You must be...

    Business with these retro-things? You must be dreaming :)
    I'm not normally selling anything, only when repairing, if anybody wants these adapters, I sell them as part of the repair.
    I design my own...

    iz8dwf Today, 02:52 AM Go to last post
    bear

    The "rerouting" adapter just flips the...

    The "rerouting" adapter just flips the orientation of the cable. That's all.

    bear Today, 02:25 AM Go to last post