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Thread: Help identify old i8085 board (supposedly Xerox)

  1. #11
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    BTW, any idea what kind of chip it is?

    11,12,27 pin - GND
    37 pin - VCC
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    Last edited by Tronix; January 12th, 2020 at 10:31 AM.

  2. #12
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    Chip marked 733W02274-1 isn't SRAM or OTP EPROM,
    pin 7,8,21 - GND
    pin 27 - VCC
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  3. #13
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    Both are most likely custom parts.

    Good luck in finding datasheets.

  4. #14
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    Quote Originally Posted by Chuck(G) View Post
    Both are most likely custom parts.

    Good luck in finding datasheets.
    Yes, its ASIC from Semiconix (SMX Semiconductor GOLD CHIP TECHNOLOGY™). Xerox located in Palo Alto, SMX in Santa Clara, California, so they are neighbors.
    Unfortunately, the chips are sent to the shelf, without the possibility of use in my homebrew CPU devices.

  5. #15
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    Problem is that the chips are dated 1984 and Semiconix has been in existence only since 1999. I suspect that the story is a bit more complex. Could possibly be HTE Labs, but that's cutting it close.

  6. #16

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    They all seem to start with 733W I suspect the 733 may be a model number.
    Dwight

  7. #17
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    Quote Originally Posted by Al Kossow View Post
    in that time frame Adobe only had 68000 Postscript, and Xerox would NEVER have used it, since they had their own horse in the race (Interscript)
    You're right of course, it had a 68000 and was probably a NEC after all. Should have looked more closely but that ROM board looked very similar.

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