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Thread: Getting Tandy 1000HX Dos-in-Rom to work on a Tandy 1000A

  1. #11
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    Ironically enough I've been looking at the idea of programming a new GAL replacement for the memory decoder PAL so I can get rid of the DOS-in-ROM on my HX to clear up the E-page for more upper memory. I guess it's a neat parlor trick but I wouldn't actually call the built in DOS "useful" if you have any better option.
    My Retro-computing YouTube Channel (updates... eventually?): Paleozoic PCs

  2. #12
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    Quote Originally Posted by Eudimorphodon View Post
    Ironically enough I've been looking at the idea of programming a new GAL replacement for the memory decoder PAL so I can get rid of the DOS-in-ROM on my HX to clear up the E-page for more upper memory. I guess it's a neat parlor trick but I wouldn't actually call the built in DOS "useful" if you have any better option.
    I've always secretly wished it were possible to boot the HP 200LX rom on a Tandy. I like that setup much better than Deskmate. 48kb would obviously be insufficient for the full 200lx rom, and the aspect ratio would make everything look ridiculous, but retro computing desires usually aren't about practicality.

  3. #13
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    Quote Originally Posted by Eudimorphodon View Post
    I guess it's a neat parlor trick but I wouldn't actually call the built in DOS "useful" if you have any better option.
    Being able to use the system within seconds of powering on without using a boot disk is, to me, what makes the HX and TL series unique and special. I wish I still had my TL.
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  4. #14
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    Quote Originally Posted by Trixter View Post
    Being able to use the system within seconds of powering on without using a boot disk is, to me, what makes the HX and TL series unique and special. I wish I still had my TL.
    I would boot from BIOS (DOS 3.3) on my TL if etherdfs supported it. As it is I've got a real neat thing going, I have the same d:\ drive on my Tandy 1000, my custom mac SE/30 emulation build, my laptop dosbox instance, and my retropie dosbox instance in livingroom.

    Basically I access the same games and apps from any dos-enabled machine in the house, no matter how old...

    Maybe now I could get a DOS 6 kernal in my TL though?

  5. #15
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    Quote Originally Posted by Trixter View Post
    Being able to use the system within seconds of powering on without using a boot disk is, to me, what makes the HX and TL series unique and special. I wish I still had my TL.
    I guess I've been spoiled by the fact that PC-DOS 7 doesn't really take meaningfully longer to boot off of my built-in XT-CF than it takes the ROM DOS to load.
    My Retro-computing YouTube Channel (updates... eventually?): Paleozoic PCs

  6. #16

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    Quote Originally Posted by smbaker View Post
    Played with it tonight a bit more. If I move my ROM from F0000 to D0000, the bios extension loads, and it attempts to start DOS 2.11.
    right, I have disassembled the 1000SX bios to mess with it, and yeah it stops scanning BIOS ROM Extensions at 0xF000, so it would never have found it post 0xF000

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