9 May
2016
9 May
'16
11:31 a.m.
On Mon, May 9, 2016 at 11:23 AM, Mattis Lind <mattislind at gmail.com> wrote:
2016-05-09 19:42 GMT+02:00 Eric Smith <spacewar at
gmail.com>:
You're probably right in that. On the other hand looking back on what I
wrote I see that I wasn't completely accurate in describing the symptom...
The symptom was that the upper 128 words was inclusive-OR:ed with the lower
128 words resulting in a quite strange upper 128 words. That was my reason
for suspecting the faulty address decoder.
Anyhow I have now ordered a bunch of Texas TBP24SA010 chips which I hope
the old Data I/O 29B will be able to program successfully.
Having just programmed some 24SA10's a couple of weeks back on a Data I/O
29B, I can report that you should be fine...
- Josh
On Mon, May 9, 2016 at 5:13 AM, Mattis Lind
<mattislind at gmail.com>
wrote:
> Last time I had a PROM failure is what the
internal address decoding
that
failed
which was easily seen as certain patterns repeated all the time
Not impossible, but it seems more likely that one of the address input
pad buffers failed.