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Recent content by Al Kossow

  1. Al Kossow

    Floating Point Systems AP-120B Array Processor

    would it be possible to get a copy of the schematics to add to the information on bitsavers?
  2. Al Kossow

    Question about original PDP-11/70 Front Panel

    here is the actual standard http://bitsavers.org/pdf/dec/standards/EL-00092-00-0_F_Finish_and_Color_Standard_Dec82.pdf page 53 specifies "Brite Rose" and "Morris Maroon" specified by the supplier of the silk-screen ink
  3. Al Kossow

    E&L MMD-1/MI Expansion Board

    I'm about to start cleaning up a sad looking MMD-1. I notice it has a 6.75 MHz crystal on the 8224. It must be dog slow.
  4. Al Kossow

    Question about original PDP-11/70 Front Panel

    This has been discussed MANY times. There were no Pantone colors
  5. Al Kossow

    Testing my RK8E and failure ocure

    Is the card near the core memory? Do you have the core memory shield card in place?
  6. Al Kossow

    Informer Portable Workstation 213 374 208B

    Could someone upload the original 1.7 213AE firmware from soviet9932? I didn't uload it to bitsavers and the link is now dead I pushed a bunch of Informer information to http://bitsavers.org/pdf/informer yesterday
  7. Al Kossow

    Just got an Equinox 100 and I got questions.

    check the caps and the rectifiers. the transformers shouldn't be buzzing
  8. Al Kossow

    S-100 Power Supply Replacements?

    all of the pictures are up now
  9. Al Kossow

    In circuit TTL logic testing with the El Dr. Gusman logic analyzer, would it be possible?

    Not in-circuit. You would have to force logic inputs high or low when they are being driven by other ICs There was a scheme HP was promoting that Atari used on some 80s arcade boards called signature analysis which put a board into a state where a known bit pattern would be produced on an...
  10. Al Kossow

    IBM System/36 TYPE 5363 Restoration - Card identification

    I just sent you a DM with an invitation
  11. Al Kossow

    Just got an Equinox 100 and I got questions.

    https://en.wikipedia.org/wiki/George_Morrow_(computers) was this one of the systems from Eddie in Union City? if you care, someone was asking a few months ago who made the enclosure it was Buckeye Stamping in OH, who is still around
  12. Al Kossow

    S-100 Power Supply Replacements?

    You can find the manual for the disk here http://bitsavers.org/pdf/fujitsu/disk/M2301_M2302 The interface is not the same that the Shugart/Quantum 8" used. Another little annoyance getting them imaged. They don't work with the 8" adapter for the MFM emulator
  13. Al Kossow

    S-100 Power Supply Replacements?

    I'll see if I can get pictures taken today after I clean the dust bunnies off of the boards. The system was in poor condition, so I just saved the boards and back panel connectors. The system is slightly different from the Decision, which has the I/O ports on the motherboard. I have several...
  14. Al Kossow

    Software Defined Commodore ROMs

    I uploaded a couple of mechanical drawings and this picture to http://bitsavers.org/components/akizukiDenshi The pins are designed to side mount to through-hole pins of a specific board thickness I've not been able to find a US source The only other pins I know of are Flip-Pins...
  15. Al Kossow

    S-100 Power Supply Replacements?

    there are regulators on the motherboard I just ripped apart one of these systems (didn't save the supplies) and I haven't had a chance to take a picture of the backplane yet
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