I have a circa 1987 MX-COM keyloader, P1280 series, with no documentation.

It has the following internal parts on a printed circuit board marked MX-P1284KL:

  • SGS-Thompson Z8671 MCU
  • M2764AFI NMOS 8K x 8 EPROM
  • SGS-Thompson MK48Z028-25 Zeropower RAM

The keyloader comes in a vinyl case with a cigarette-lighter power connector and a stereo-style jack connector.

The one-page programming sheet:

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Last updated August 20, 2011