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© Joe Farr, 2011 – 2026

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Month: January 2023

  • MC14411 Datasheet

    The MC14411 is a bit rate generator IC and is used as the master clock rate generator within the 1882-00 and 1882-01 ALME

  • 2114 Datasheet

    The 2114 SRAM (Static Random Access Memory) chip is a 1024 word x 4 bit memory. Four of these memories are found inside the DAP4 CPU boards (1528-xx) configured as 2Kb x 8 bits and used for the video display buffer. SRAM is useful as it doesn’t require a constant refresh signal from the CPU,…

  • 1882-xx ALME Technical Information

    The PSR ALM(E); Asynchronous Line Multiplexer Extended, serves as the main interface between the computer and the outside world. ALM’s contain four identical data channels that can be configured in a number of different ways for different purposes. ALM channels are typically used to drive VDUs or modems, but can be used to connect to…

  • When the Logfile is full

    At some point the system logbook or logfile is going to fill up and need to be printed. Some operating system version offer a reset logfile program, usually available on the Manager or System selectors, but it’s not available on all operating system versions, and unless you are running your system in a live environment,…