Them new fangled transistor compters Them new fangled transistor compters
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  1. #1

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    Default Them new fangled transistor compters

    Electronic Computer Exhibition

    Stone me, OC44 and OC45 transistors in a computer.

    I built an audio amp with OC23 transistors.

    It sounded quite good.

    Just noticed that there's mention of a vey early "Xeronic" printer.

    The predecessor of the laser printer.

    The result of co-operation between Rank & Xerox.
    Last edited by zeitghost; 22nd May 2017 at 12:41.

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    Ahhhh, Eliot processors, brings back some memories. Worked on the 920C with a half ferrite core and half EEPROMS. 14 octal machine instructions and that was your lot, searching link maps for spare bits of memory and having to do stepping stone jumps to get to a big enough piece of contiguous space.
    But I discovered nothing else but depraved, excessive superstition. Pliny the younger

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    Eliot processors? You must be a lot older than you look!! Think the Elliot 405 was the first I ever worked on.
    bloggoth

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    Quote Originally Posted by SupremeSpod View Post
    George 3

    That's where I started my life in IT.

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    Quote Originally Posted by xoggoth View Post
    Eliot processors? You must be a lot older than you look!! Think the Elliot 405 was the first I ever worked on.
    It was some old military kit, designed in the 70s and still in use in the nineties.
    But I discovered nothing else but depraved, excessive superstition. Pliny the younger

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    Quote Originally Posted by Gibbon View Post
    It was some old military kit, designed in the 70s and still in use in the nineties.
    Funny how that old core store is rad hard & comes back to life after you cycle the power.

    Unlike dynamic ram.



    And speaking of which:

    Glenn's Computer Museum

    Plated wire memory.

    I'd forgotten about that one.

    And here's one they've just repaired:

    BBC News - Two-tonne Witch computer gets a reboot

    Described in today's Metro (that journal of record) as

    Quote Originally Posted by Some Feckwhit Metro Journalist
    This ramshackle collection of valves, buttons and wires


    It doesn't look particularly ramshackle to me.

    Quote Originally Posted by Aunty Beeb
    The machine first ran in 1951 and was known as the Harwell Dekatron - so named for the valves it used as a memory store.

    Although slow - the machine took up to 10 seconds to multiply two numbers - it proved very reliable and often cranked up 80 hours of running time in a week.
    Ah, blinken lights - Dekatrons are neon filled counter valves.

    10 seconds per multiply.

    Quicker than someone using a mechanical adding machine, I suppose.
    Last edited by zeitghost; 22nd May 2017 at 12:43.

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