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Thread: Toshiba T-300 / Pasopia 16 MS-DOS version

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  1. #1

    Default Toshiba T-300 / Pasopia 16 MS-DOS version

    I recently found a Toshiba t300 with no software.

    I've tried various images of ms-dos from 1.x to 3.x and cp/m 86 to no avail. A non-bootable disk is rejected properly and a bootable disk usually displays an error dependent on which image is used and fails to boot. Does anyone know if this machine uses a Toshiba specific version of MS-DOS 2.x, or perhaps have some other suggestions that could help.

  2. #2

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    Try the 'bootable' disk(s) on a known good machine to make sure they actually work. Otherwise, you'll just be spinning your wheels.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  3. #3
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    The T-300 has quad-density floppy drives so be careful not to use high density disks with it. If InfoWorld's description is correct, the drives read strange formats: Toshiba's 80 track DS 640kB, DOS 40 track DS 320kB, and a 192kB format (? no idea what that is). Later BIOS revisions seem to support 720kB formats and presumably also 360kB but I can't confirm the latter.

    What errors specifically are you seeing?

    I would try creating a bootable disk using 8 sectors per track for a 320kB format.

  4. #4

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    Quote Originally Posted by krebizfan View Post
    The T-300 has quad-density floppy drives so be careful not to use high density disks with it. If InfoWorld's description is correct, the drives read strange formats: Toshiba's 80 track DS 640kB, DOS 40 track DS 320kB, and a 192kB format (? no idea what that is). Later BIOS revisions seem to support 720kB formats and presumably also 360kB but I can't confirm the latter.

    What errors specifically are you seeing?

    I would try creating a bootable disk using 8 sectors per track for a 320kB format.
    Thanks for replying. I'm using DD disks. I have tried both 320k and 360k formats with the same results: depending on the specific DOS image I'm using, I get either "integer error", a single symbol (can't remember what one), or nothing at all. The disk is read for a split second before this happens. If the disk doesn't have a executable boot sector, or the disk is in a weird format, it attempts to read it a few times, then says disk error or something similar.

  5. #5
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    Quote Originally Posted by cperric View Post
    ...I'm using DD disks. I have tried both 320k and 360k formats with the same results: depending on the specific DOS image I'm using, I get either "integer error", a single symbol (can't remember what one), or nothing at all.
    The boot disk must be DS/DD/96TPI (512B/sec, 8SPT, 80x2 Tracks).
    It can use (but not boot from) IBM-compatible SS or DS/DD disks (512/8/40x1 or 2 tracks); CP/M can also use T100 format disks.

    Note that you can only format 96TPI.
    Last edited by MikeS; November 10th, 2016 at 01:15 PM.

  6. #6

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    Quote Originally Posted by MikeS View Post
    The boot disk must be DS/DD/96TPI (512B/sec, 8SPT, 80x2 Tracks).
    It can use (but not boot from) IBM-compatible SS or DS/DD disks (512/8/40x1 or 2 tracks); CP/M can also use T100 format disks.

    Note that you can only format 96TPI.
    How should I go about making a system disk in that format? Using a standard HD drive, in msdos (format b: /T:80 /N:8 /S) I get an invalid parameter error. Do I need a quad density drive to create this format? Can I use one of the drives from the t300 perhaps. Sorry for all the questions.

  7. #7

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    Quote Originally Posted by Stone View Post
    Try the 'bootable' disk(s) on a known good machine to make sure they actually work. Otherwise, you'll just be spinning your wheels.

    Thanks, I give that a try just to be sure.

  8. #8
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    Quote Originally Posted by cperric View Post
    I recently found a Toshiba t300 with no software.

    I've tried various images of ms-dos from 1.x to 3.x and cp/m 86 to no avail. A non-bootable disk is rejected properly and a bootable disk usually displays an error dependent on which image is used and fails to boot. Does anyone know if this machine uses a Toshiba specific version of MS-DOS 2.x, or perhaps have some other suggestions that could help.
    Yes, it uses a Toshiba version of MS-DOS 2.x although I don't know whether a generic version would boot. Configuration is different depending on whether you have one or two floppies; how many do you have? And yes, the drives are 'Quad' density, i.e. DD disks but 96TPI instead of 48; ordinary (48TPI) DD disks usually work, but not always.

    I *think* I may still have a T300 somewhere, as well as the manuals (User, MS-DOS and BASIC) and disks; I'll have a look when I get a chance.

    m

  9. #9

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    Quote Originally Posted by MikeS View Post
    Yes, it uses a Toshiba version of MS-DOS 2.x although I don't know whether a generic version would boot. Configuration is different depending on whether you have one or two floppies; how many do you have? And yes, the drives are 'Quad' density, i.e. DD disks but 96TPI instead of 48; ordinary (48TPI) DD disks usually work, but not always.

    I *think* I may still have a T300 somewhere, as well as the manuals (User, MS-DOS and BASIC) and disks; I'll have a look when I get a chance.

    m
    Thanks that's awesome. It has two drives. I used DD disks imaged with an HD drive by the way.

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