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Thread: Model 4P: Montezuma Micro CP/M and TRSDOS 6 on same Tandy 5 Meg hard disk?

  1. #1
    Join Date
    Jun 2019
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    Philadelphia area
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    Default Model 4P: Montezuma Micro CP/M and TRSDOS 6 on same Tandy 5 Meg hard disk?

    It seems

    1) I can put CP/M on heads 0-1 or 0-2 and the Model 4P will boot CP/M from hard disk, but this prevents installation of TRSDOS 6 to the hard disk on the free head(s),

    or

    2) I can I put TRSDOS 6 on the first few head(s) and then CP/M on the remaining free head(s), but then CP/M will not boot from hard drive, only floppy, and will not retain CPMFIX enhancements.

    Am I missing some option to get both OS's on the hard drive?

  2. #2
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    Jun 2015
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    Sioux Falls SD
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    I have created a hard drive with multiple operating systems and MM CP/M booting. There is a sequence that you need to follow. I'm traveling at the moment, but when I get home, I'll find the document I wrote and make it available.

  3. #3

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    I made a pdf from the original document for myself some times ago.
    Maybe it will be helpfull - source was HARDRIVE.DOC from MMRSHD.DSK
    .

    http://oldcomputers-ddns.org/public/...or_cpm_2-2.pdf
    Last edited by fritzeflink; July 7th, 2019 at 03:02 AM.

  4. #4
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    Here is a link to a procedure I developed using a Seagate ST-4038 MFM drive in a Tandy 5 MB enclosure. The key step is to save space at the beginning of the drive for MM CP/M, but create that partition last so it is bootable. For the original 5 MB drive, you will have 4 heads and 153 cylinders.

    https://drive.google.com/file/d/1VEB...ew?usp=sharing

  5. #5
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    Jun 2019
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    Philadelphia area
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    Quote Originally Posted by lafos View Post
    Here is a link to a procedure I developed using a Seagate ST-4038 MFM drive in a Tandy 5 MB enclosure. The key step is to save space at the beginning of the drive for MM CP/M, but create that partition last so it is bootable. For the original 5 MB drive, you will have 4 heads and 153 cylinders.

    https://drive.google.com/file/d/1VEB...ew?usp=sharing
    Fantastic! Thank you! I will take a look and see if I can make it work on the standard Radio Shack 5 meg drive.

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