AMD2901s (was e: Inside old games machines,was: Re: Simulated CP/M-68K?)

[Allison]

>
>Subject: AMD2901s (was e: Inside old games machines,was: Re: Simulated CP/M-68K?)
>   From: "Ethan Dicks" <ethan.dicks at gmail.com>
>   Date: Tue, 19 Jun 2007 13:30:47 -0400
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>On 6/19/07, woodelf <bfranchuk at jetnet.ab.ca> wrote:
>> Providing the word length is a multiable of 4 bits that is.
>
>It sure would be "fun" to debug microcode issues with nine of those
>puppies chained together.

Ignoring race conditions 9 of them are no harder than one.
The nasty is propagation delays.  A machine that you can 
microcode single step or slow step makes life easier.

I did an "improved 8080" a bunch of years ago using 2 and 
it was fun.  I have a dozen or so 2901Cs that were supposedly
the fastest of the TTL flavor. Though the ECL parts were much 
faster.


Allison