19 Jan
2015
19 Jan
'15
1:45 p.m.
On Mon, Jan 19, 2015 at 04:39:30PM -0500, John Wilson wrote:
On Mon, Jan 19, 2015 at 09:26:57PM -0000, Robert
Jarratt wrote:
His problem is he will have to unsolder the 8085 first.
I'd suspect RAM since the ROM is (I assume) masked ROM.
In my latest tests I found that the CPU does
indeed seem to HALT,
according to S1 and S0 (both go low).
What ever happened to in-circuit emulators? I used an 8085A ICE in
a microprocessors class at Boston U. in the 1980s and it was *magic*.
I always wondered how they worked -- is it just an 8085A with a doctored
clock, or some complete re-implementation of it, or what? Physically
it was a 40-pin DIP plug with a thick cable leading off to a mass of
electronics. It's just the kind of thing that would turn up on eBay,
but only if you didn't need it.
John Wilson
D Bit
Diane
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