Emulators of Classic Computers

From: Jim Davis <jimmydevice_at_hotmail.com>
Date: Sun Jan 18 00:35:13 2004

Jos Dreesen wrote:

>
>>
>> There were few articles in european "elektor" about a computer build
>> completely out of 74xxx. Was beginning of the 70's, and was called
>> (?) the 74-computer.
>>
>> Would love to see this articles again ...
>>
>> cheers
>
>
> That design was somewhat strange, it used no clock, but relied on
> handshaking for its timing.
> It was also very inefficient in its hardware usage, using scores of
> 74181`for hardware multiply and divide.
> It had a choice of shiftregisters or 2102 as main memory.
>
> No PCB were produced. It was not for the fainthearded....
>
> Jos Dreese
>
>
181's were priced at $3.75 in 1979, But micros were coming on strong
and wiped the
home brew ttl micros aside. I know. I built a ttl 181 / 189 based cpu
and junked it for
the altair.
Jim Davis,.
Received on Sun Jan 18 2004 - 00:35:13 GMT

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