New pcb design for S-100 prototype board available - test-drb@ccmp.vtda.org

4 Jun 2007

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Subject: Re: New pcb design for S-100 prototype board available
   From: "Ethan Dicks" <ethan.dicks at gmail.com>
   Date: Mon, 04 Jun 2007 17:38:18 -0400
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

  Grant Stockly wrote:

 > Someone built one of my Altair replica PCBs and went to great lengths to
 > make sure the date code on the ICs was older than 1975.  They also
 > sourced the old brown cylindrical resistors. 
I've been known to do that, but for much more trivial examples - when
I built my 1976-design Elf, I did the best I could on chips (my CPU
and memory were of the period, but I have not yet tracked down a 74L00
for the clock divider circuit), but I was happy to have a bin of 
;) L00?  I bet I have a few that are pre ELF.

...
 vintage brown cylindrical resistors for the pullups.  I
had to
compromise on the regulator - the oldest one I could find in my junk
bin was an LM340T. 
I have a shopping bag of those resistor, really! the LM340 was period
and valid but, I have 7805s that are date coded 7951 (last week of '79).
Somewhere I came across a few baggies of them as they are handy.

I also have 1uS 2102s, 5101 and other old ram.

...
 Obviously, the computer doesn't care, but I wanted
something that
would have looked as if I had made it when I first got into computers
as a kid.  A complete indulgence to nostalgia. 
:) they dont care.  I tend to build new hardware using that old stuff
as I've had it for that reason, that is to build with.  

...

-ethan 