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  1. Thread: Ebay 'offer'

    by Al Kossow
    Replies
    15
    Views
    261

    Let him put it up If the others bidders were...

    Let him put it up
    If the others bidders were significantly lower, there is a high probability it won't sell for as much
    unless the first buyer wants to hoard them all
  2. I felt that way until Halted closed, though...

    I felt that way until Halted closed, though Excess Solutions bought some of Bob's stock.

    Obscure ICs are something to go after, since you can't trust that the stuff coming out of China isn't...
  3. https://groups.google.com/forum/#!forum/alt.sys.pe...

    https://groups.google.com/forum/#!forum/alt.sys.perq

    Josh Dersch, S. Boondogle, Tony and Bruce Damer/Digibarn have them
    I'm sure there are others around.

    I have a T1 chassis, but no keyboard...
  4. It isn't a standard DEC connector, it was a...

    It isn't a standard DEC connector, it was a custom made by Tennecomp
    You aren't going to find one.
  5. Replies
    22
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    451

    when building rom adapter boards, you want to...

    when building rom adapter boards, you want to consider using flip pins to keep from destroying your original IC sockets
    http://oshchip.org/products/Flip-Pins_Product
  6. Replies
    175
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    12,469

    It is past the time for this thread to die.

    It is past the time for this thread to die.
  7. Replies
    175
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    12,469

    Other than the ones from Canada the Computer...

    Other than the ones from Canada the Computer Museum saved, and are on exhibit in their original unmodified-for-Hollywood state today in Mountain View, CA.
  8. Replies
    6
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    208

    It's a tape controller

    It's a tape controller
  9. Thread: RS232 bridge

    by Al Kossow
    Replies
    7
    Views
    156

    consider using the Maxim MAX214 and making the...

    consider using the Maxim MAX214 and making the device auto DTE/DCE switching
  10. Great to see it working Another bit of hardware...

    Great to see it working
    Another bit of hardware I never had the time to do anything with.
  11. Replies
    5
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    340

    uh huh, it was built some time in the 60's, that...

    uh huh, it was built some time in the 60's, that makes it "Apollo era"
  12. According to the top of vcfed.org web page, it...

    According to the top of vcfed.org web page, it hasn't happened yet
    I'm still being told not to miss it!
  13. Thread: Paper Tape

    by Al Kossow
    Replies
    10
    Views
    423

    Paper tape is always unpunched. Punching the feed...

    Paper tape is always unpunched. Punching the feed hole guarantees the hole lines up with the data.

    It isn't uncommon for tapes produced on a poorly maintained duplicator (mostly seen this on DEC...
  14. If you have a floppy, make LIF backups of those....

    If you have a floppy, make LIF backups of those.
    The preprocessors are hard to find.
  15. http://bitsavers.org/pdf/dec/drum/F-15(24)_serialD...

    http://bitsavers.org/pdf/dec/drum/F-15(24)_serialDrum_Aug63
    http://bitsavers.org/pdf/dec/drum/H-24_serialDrum_Nov65.pdf
  16. "Kaypro" and "Osborne" are pedestrian. The PDQ-3...

    "Kaypro" and "Osborne" are pedestrian.
    The PDQ-3 is not. It is a Pascal Microengine built onto QBus boards
    https://www.computerhistory.org/collections/catalog/102718415...
  17. dec/disc and /drum on bitsavers as well as every...

    dec/disc and /drum on bitsavers as well as every product line individually including the price lists

    they didn't start building their own drives until late in the 60's with the small fixed-head...
  18. If it was working with a joystick port, it sends...

    If it was working with a joystick port, it sends up/down left/right pulses and is NOT a quadrature input, so you need to convert the quadrature signals to direction pulses.
  19. If it were me, I'd build a large 36v supply with...

    If it were me, I'd build a large 36v supply with a bunch of cables to all the modules.
    The Convergent power system is clever as far as being able to use the smallest power supply and
    stack them as...
  20. Thread: Paper Tape

    by Al Kossow
    Replies
    10
    Views
    423

    Western Numerical Controls went out of business a...

    Western Numerical Controls went out of business a few years ago
  21. Replies
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    986

    AFAIK, I'm the first person to dump Mindset...

    AFAIK, I'm the first person to dump Mindset application disks, and they turned out to have trk41 copy protection
    I still haven't heard if the dumps with trk41 added work, since I don't have a...
  22. Replies
    42
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    4,761

    Do you have anything on the SBD Plus? I just...

    Do you have anything on the SBD Plus?
    I just bought one off eBay which uses a 34010 instead of a 68000
    https://www.ebay.com/itm/DEC-DIGITAL-VINTAGE-DOWTY/312677872600

    54208
  23. Replies
    12
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    986

    The power system in the Mindset is convoluted....

    The power system in the Mindset is convoluted. Power is supplied to a microcontroller on the cpu board and the keyboard microcontroller
    any time the unit is plugged in. The power switch is sensed by...
  24. Replies
    2
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    209

    another one is listed, and they showed the...

    another one is listed, and they showed the Incoterm serial number plate
    https://www.ebay.com/itm/202719074456

    more than you ever wanted to know...
  25. Replies
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    1,328

    Or just replace them with .1" headers on the pcb...

    Or just replace them with .1" headers on the pcb and ribbon cables.
    No need to use H803 extension cables then either.
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