8080 vs. 8080A - test-drb@ccmp.vtda.org

1 Oct 2001

From: Carlos Murillo &lt;cmurillo(a)emtelsa.multi.net.co&gt;

...
 At 11:07 PM 9/30/01 -0600, you wrote:
The
>8085, at least, doesn't require three supplies.  I don't know why they
wasted
...
 >all those pins on things like the pseudo-serial I/O
and all those interrupts.
...
 >Hardly anyone ever figured out how to use them
well.  It would have been more
...
 >sensible to put the 8 address lines there and save
the external latch and the
...
  strobe for it.

Those irq's are exactly why I liked the 8085.  Extremely simple
to use. Appropriate for early embedded stuff. 

that is the exact reason why the 8085 was successful.  As to the comment
about the SIO/SID pins they were used by the TU58 for serial data and
were
very hand for when a few bits of IO were needed for simple things.

Allison