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Type: Posts; User: Al Kossow

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    The part numbers on the toshiba gate arrays are...

    The part numbers on the toshiba gate arrays are completely different from the two on the 3270 display board (1503193/94)
    It is an IBM board by the 6xxxxx part number. Nothing obvious jumped out in a...
  2. documentation for the vt61 and 62 are on...

    documentation for the vt61 and 62 are on bitsavers
    http://bitsavers.org/pdf/dec/terminal
    the 61 allowed offline screen edititng, the 62 was the terminal designed for the TRAX transaction processing...
  3. I'm interested as well, or of a copy of any later...

    I'm interested as well, or of a copy of any later version
  4. Did you check the extra ground pins?

    Did you check the extra ground pins?
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    Just like the undocumented features in the...

    Just like the undocumented features in the offshore ARM SOCs (or Apple's for that matter).
    People will be longing for the days of PC forced compatibility.
  6. The IMSAI front panel has incompatible signals...

    The IMSAI front panel has incompatible signals with IEEE S-100 compatible cards.
    Many cards have ways to disable the offending signals, you'll have to check the Interfacer 1 manual to
    see if they...
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    And WD is cheap and doesn't want to pay ARM...

    And WD is cheap and doesn't want to pay ARM royalties which is why they're hot on using something free.
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    It's vital to get the sysem dumped, since SMS...

    It's vital to get the sysem dumped, since SMS built their own controllers many of which were not command
    compatible with the ones from DEC.

    RT BASIC-PLUS and Oregon PASCAL are a good find.
  9. this IA link works...

    this IA link works
    https://web.archive.org/web/20150206224303/http://www.microsoft.com/en-us/download/confirmation.aspx?id=41182
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    The only thing I can think of that might be a...

    The only thing I can think of that might be a problem is if the device you are talking to isn't powered on.
    We burned up a ribbon cable once where the device being driven was off, and the cmos...
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    The issue is actively driving the line when it is...

    The issue is actively driving the line when it is high, instead of letting it be pulled up to 2/3 vcc by the terminator network.
    I assume it would be used on a unidirectional signal line?
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    that's pretty much it in 'PC' space MIPS in...

    that's pretty much it in 'PC' space

    MIPS in SOCs, SPARC, and POWER in Fujitsu and IBM
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    oops, should have been the 1/3 height okidatas

    oops, should have been the 1/3 height okidatas
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    All of which contain flash storage which will rot...

    All of which contain flash storage which will rot over time, along with the problem of almost no currently produced parts having 5v compatible I/O.
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    what is the model number from the two Epson...

    what is the model number from the two Epson drives?
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    This was 1985, NexWorld was a magazine published...

    This was 1985, NexWorld was a magazine published by Spectrum International
    Unless a BBS picked it up, and someone saved that, there is zero chance there would be a mirror.
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    the software I have is on...

    the software I have is on http://bitsavers.org/bits/NEC/APC
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    took some digging to find here is John's last...

    took some digging to find
    here is John's last message which I forwarded to cctlk from alt.folklore.computers

    From aek at bitsavers.org Fri Sep 4 11:45:33 2015
    From: aek at bitsavers.org (Al...
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    It was a non-profit run by John Keys that failed...

    It was a non-profit run by John Keys that failed due to lack of funding
    The collection was stored in a space that was water damaged in the hurricane a few years back
    A few pictures at...
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    If you find a SDS 910, between that and the SEL,...

    If you find a SDS 910, between that and the SEL, it would definitely ID it as the remains of the Houston Computer Museum
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    could you dump the firmware and character...

    could you dump the firmware and character generator and take some pictures of the logic board?
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    It seems like a really bad idea with switch-mode...

    It seems like a really bad idea with switch-mode power supplies. You're just going to increase the current in the input chopper.

    I could see making sure you have clean AC power to minimize...
  23. keep an eye on the filters, especially if the...

    keep an eye on the filters, especially if the case is sitting on the floor
    also, the filters go on the incoming air side
    so if you don't have a fan pulling air in, the filters need to go wherever...
  24. search for "Dave Dunfield" and "imagedisk" the...

    search for "Dave Dunfield" and "imagedisk"
    the spec for the format has been released

    It supports pretty much anything that can be created with a 765 style floppy controller, including mixed...
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    D/CAS pinout is shown on page 249 of...

    D/CAS pinout is shown on page 249 of http://bitsavers.org/pdf/teac/MT-2ST/10180354-01_Teac_MT-2ST_20D-10_Streaming_Cassette_Tape_Maintenance.pdf

    electrically is has the same pinout as QIC-02, I...
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