8 Sep
2015
8 Sep
'15
4:51 p.m.
On 2015-Sep-08, at 2:39 PM, Jay West wrote:
Sean wrote....
------
The median listing price for them on eBay for a 29B with pack seems to be around $3-400
which IMO is a little steep for a 30+ year old PROM programmer.
------
Nope. There is a very good reason why they still command such a price. Worth every
penny.
I can't belittle a 30 year old piece of test equipment no more than I could a
similarly aged computer :)
Alternatively, for the rare instance of need, burning fusible PROMs generally or often
isn't very complex.
When I needed to burn a replacement 74S387 (256*4) for a repair awhile ago, I hacked up a
programmer on a breadboard, controlled by a program running on an RPi. The hardware was an
LM317, 7805, 3 TTL ICs, 5 transistors, and a few R/C/D. Add 4 more transistors for
8-bits.