KD5ZXG
Last Activity:
Oct 22, 2017 at 10:03 AM
Joined:
Mar 24, 2017
Messages:
102
Likes Received:
31
Trophy Points:
28
Gender:
Male
Location:
Dallas
Occupation:
Test Lab Supervisor

KD5ZXG

[H]Lite, Male, from Dallas

KD5ZXG was last seen:
Oct 22, 2017 at 10:03 AM
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  • About

    Gender:
    Male
    Location:
    Dallas
    Occupation:
    Test Lab Supervisor
    Replacing soldered-in crystals before there was even a name for
    it. NEC V-20 was worth a 15% speed boost if you had an XT.
    Peltier cooled 386DX16 to 28MHz! Replacing LS with F logic to
    speed up ISA bus to 14MHz. TSENG4000 that would smoke
    Landmark Speed Test. Where those days gone???

    Still have my father's own design (not a DEC copy) wire wrapped
    PDP-8e compatible minicomputer. 20MHz in 1973! He had a full
    home air conditioner blowing into the rack from our attic's garage
    ladder opening (Sone-age vapor-phase blowhole garage mod).

    Working on my own design lookup-table minicomputer as time
    permits. Abusing lots of 35nS MRAM as a programmable logic.
    Except carry, I don't need real flags. No test for zero or anything
    else, cause all flags can be pre-tested at time of table build. My
    flags are omitted and replaced with resulting actions, like wether
    to branch.

    Flags can still be tested for purpose of front panel lights, but the
    processor doesn't care and can get on with the next instruction.
    Always the same long instruction, two moves, one ALU lookup.

    All these newbs and their "overclockings", go figure...