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  1. S

    New PDP-11/53 Build

    I recently acquired a KDJ11-DB board which appears to be from 1991, based on the date codes on the chips. Put it together with an H9278-A backplane, MeanWell RD-85A power supply, a 3U rack mount case from Circuit Specialists and homebrew front & rear panel (or cab kit to use the DEC term) and...
  2. S

    TeleVideo Personal Terminal

    TeleVideo Personal Terminal User's Guide: https://drive.google.com/file/d/18qrZFRLbBO9y4jGV-K3McjFOG7Ek8Lw3/view?usp=drive_link Includes escape codes, graphics characters, alternate character set, set up procedure.
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    CoCo2 26-3127B weirdness

    Anyone familiar with the 20261058 PCB (Korean-made 26-3127B)? I can't find a schematic for this particular board online. I'm wondering what the purpose of R33 is. It's a 10K pullup resistor on DD0 (IC14 pins 2/14, IC3 pin 8 - IC14 is 4164 RAM and IC3 is MC6847T1/XC80652 VDG). It looks to be...
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