August wrote:

 JP>> Did you work on the Z80 at all ?

 AA> Not directly.  I remember buying a Z80 programming book from Radio Shack
 AA> to get exposed to the mysteries.  The Macrodata programming was very
 AA> similar.  I was eventually dreaming and thinking in octal.

	I once had a Z80 in a NavStar receiver and a friend of mine had a burner
for the Z80. We toyed with the idea of working on that small CMOS but the
US Gov. took the NavStar off the air as the new generation of Sats were
coming on-line.

	I then got a Garmin 50. Retail in 1992 of $1200.00, I got it escounted at
$800. in a boatshow. It quit on me last month, since then I got three of
them on eBay at a total of $51.00, incl S/H. One needed  a new Mem cell,
done. Yesterday, I took the CMOS from the bad one, it had been updated, and
implanted it in the second one. Total success, I now have two operable GPS,
marine type. The third one has not reached me yet, should be today. They
are fun to play with if you are a navigator, they offer strictly basic
information, no GUI screen.

--- Thunderbird 2.0.0.23 (Windows/20090812)