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.
