bit slice chips (was Re: Harris H800 Computer)

ben bfranchuk at
Fri Apr 22 23:03:33 CDT 2016

On 4/22/2016 9:16 PM, Chuck Guzis wrote:
> On 04/22/2016 07:54 PM, Jecel Assumpcao Jr. wrote:
>> I'd add the Texas Instruments SN74S481, SN54LS481 and SN74LS481 TTL
>> 4 bit slices. The Schottky version had a 90ns clock cycle and the
>> low power versions 120ns. These were 48 pins chips and didn't have
>> an internal register bank like the 2901. The idea was that you
>> implemented a memory to memory architecture like the TMS9900.
> Not exactly bit-slice, but how about the National IMP-16 chip set?

Too Early , Too Slow , Too $$$ is my guess.
With out the 6800/6502 8080/Z80 price wars, how much would a 8 bit
CPU be in the late 70s? $75?

> --Chuck

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