27 Apr
2010
27 Apr
'10
11:37 a.m.
On Monday (04/26/2010 at 06:31PM +0100), Tony Duell wrote:
Yes indeed. That will be plan B if Dave is unable to read his 8355 in
his PROM programmer.
The tty interface on this SDK-85 was built for 20mA current loop so I'll
have to either rework that to RS232 or invent a new method to offload.
But not a big deal really.
I would be _very_ supprised if that serial interface doesn't sue some
TTL-level serial chip (or bit-banged through a TTL level port) followed
by a current loop interface.
In which case, since you need output only, grab the TTL leve signal at
the input to the coverter and feed it into something like a MAX232 (or a
1488 if you have +/-12V suppleis around).
-tony
I don't suppose anyone has a spare 8355 with SDK-85 monitor burned in
it do they?
Alas not. But if the device works if you cool it, can't you read it out
when it's been cooled? Surely the SDK-85 has some kind of I/O port
you could dump it to. And then burn the bits into an 8755 as you suggested.