Image Map Image Map
Results 1 to 10 of 10

Thread: What sort of board is this?

  1. #1

    Default What sort of board is this?

    A while ago I bought a grab bag of computer components because I saw, in the corner of one of the photos, an S-100 connector. Well the box contained a bunch of these cards:



    Anyone know what they are? The sticker on the bottom one says LUBBOCK TV 3-14-00 (only 17 years old!)

    Are these boards to stick a PROM into a certain address? Are they EPROM programmers?

  2. #2
    Join Date
    Oct 2008
    Location
    Kamloops, BC, Canada
    Posts
    4,758
    Blog Entries
    38

    Default

    Looks like the simplest version of a ROM board I have ever seen. Just enough logic to support one chip.
    Judging from the "PROGRAM BOARD" silkscreen on it lived in some industrial application and served as the home for whatever program the device needed.
    = Excellent space heater

  3. #3

    Default

    I can't quite make it out in the picture, but there appears to be a copyright on the left side of the board. Looks like (C) 1990, but I can't make out the company. That might shed some light.

  4. #4
    Join Date
    Jan 2010
    Location
    Central VA
    Posts
    3,369

    Default

    Like NeXT said, super simple ROM board. I'd agree that it's probably from some embedded or control application. From the pin count on the ROM, it looks like it probably occupies most of memory space.

  5. #5

    Default

    Very interesting. The top left says (C) 1990 American Information Systems, Inc. Assy: ROM512 Rev.D Mod 0.

    The chips in order from right to left are:

    SN74LS245N (octal bus transceiver)
    SN74LS245N
    SN74LS245N
    TIBPAL16LB-15CN (programmable array logic, in a DIP socket)
    74LS74AN (dual D-type positive-edge flip-flops)
    DM7406N (hex inverting buffer)

    The +5VDC VREG is an LM309K

    The PROM label on this one appears to say Lubbock CO, TX 5/15/04. The PROM itself is an M27C512 EPROM, 64kx8. I'm assuming it can't be erased, as it has no UV window and doesn't say EEPROM.

    Interestingly there's a jumper for 8 and 16, and SCAN and ACU. I'm assuming the former is for 16-bit compatibility.

    The box that it came in also had a bunch of EUROBUS cards that seemed to have come from an ATM. However, after examining the PROM...This is from a municipal election machine! It appears to have been programmed for a general election on May 15th, 2004. It comes from an AIS 115/315 ballot scanner. Something like this:


  6. #6
    Join Date
    Jan 2010
    Location
    Central VA
    Posts
    3,369

    Default

    Hah, wow! Who knew ballots were being counted by S-100 boxes?! That's pretty cool.

  7. #7
    Join Date
    Jan 2007
    Location
    Pacific Northwest, USA
    Posts
    25,062
    Blog Entries
    20

    Default

    The surprising thing is the use of a TO-3 voltage regulator (usually 3-5 amps!) where a 1 amp TO-220 would have done nicely.

  8. #8

    Default

    Any Russian text in the eprom

  9. #9
    Join Date
    Dec 2005
    Location
    Toronto ON Canada
    Posts
    6,785

    Default

    Quote Originally Posted by gekaufman View Post
    Any Russian text in the eprom

  10. #10

    Default

    Quote Originally Posted by gekaufman View Post
    Any Russian text in the eprom
    I know better than to help Americans see the source code of their voting software. I don't want to end up dead! In fact, I wonder if I'm legally obligated to destroy these EPROMs.

    Note to the FEC: I have destroyed the EPROMs.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •