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Re: Hand-Built CPU

 
 
Robert Miles
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      05-31-2009, 06:02 AM
"William" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) acquisition...
>
> "First of One" <root@127.0.0.1> wrote in message
> news:(E-Mail Removed) ...
>> Man builds a custom CPU on a wire-wrap board with dozens of simple logic
>> chips: http://www.stevechamberlin.com/cpu/bmow1/

[snip]
>
> So he used 7400 series logic. That's C-MOS isn't it? I like that stuff,
> did a lot with that. I could make an oscillator out of two nand gates.
> Those were the good-old-days. I still got a box of chips somewhere in my
> hobby room.
>
> What fun.
>
> William

The 74C00 series and a few more varieties were CMOS, but the original
7400 series was TTL instead. I used to have a few dozen tubes of 7400
series, 74LS00 series, and so on..

Note that it has a rather low clock rate - currently 2 MHz, with a
theoretical
possibility of increasing it to 3 MHz.

Robert Miles


 
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