Re: Signature Analying (DOH!!)

I have been thinking about such a box since I mentioned
the idea of a "soft ICE" a couple of weeks ago. The
problem with my original idea was a completely software
controlled interface would still be too slow, so I was
thinking of a state machine specific to each supported
CPU that could to reads and writes. By the time you do
that and add all the other bus control logic and intrs
it's just as complicated as putting a CPU out there.

Orion Instruments made a box called the Unilab 8620
that was a "universal ICE" that supported Z80's and
6502's. It is a small box with a 40 pin connector
that goes to a PC that had local trace memory, an
EPROM programmer, a trace pod, and a cable that
went to the CPU socket of the target. I found just
the external box at a surplus place for $15 w/o
the host card or target cable (or software :-( )

The current thought is a box with an IDE interface
(you can use IDE as a dumb parallel interface if
 you only need 8 external addresses) controlling
a pod with the target CPU on it.
Received on Tue Dec 9 08:54:56 1997