Building my own classic style computer update - test-drb@ccmp.vtda.org

28 Aug 2007

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Subject: Re: Building my own classic style computer update
   From: "Chuck Guzis" <cclist at sydex.com>
   Date: Thu, 23 Aug 2007 19:21:52 -0700
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

On 23 Aug 2007 at 17:20, Mr Ian Primus wrote:

   Zilog
Z8442BPS  Serial I/O controller

  Zilog Z8430BPS  Counter timer circuit

It's been a long time--but didn't the "vintage" chips have legends 
such as "Z80-SIO" and "Z80-CTC" as well as "Z80-CPU"?  I
liked that 
convention--didn't leave much to the "I wonder what the heck this 
chip does" mindset. 
Varied from time to time.  Early on that was the case, as ZILOG moved 
into a greater variety of parts and then CMOS they needed to have part 
numbers that wer more unique so the Z80-SIO became 844x (X=1,2,3,4 for 
bond options) and later 84C4x for the cmos versions.

Allison