8 Sep
2015
8 Sep
'15
1:19 p.m.
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. Hopefully your best offer successfully accepted was much lower!
I think the part cost on the PROMs pales in comparison. For the cost of the
29B, you could design a replacement for the original PROM, have some boards
fabricated, stuff them and you'd still be ahead a few hundred bucks ...
starts to make sense at those kind of prices, imo.
Best,
Sean
On Tue, Sep 8, 2015 at 3:14 PM, Marc Verdiell <marc.verdiell at gmail.com>
wrote:
From: dwight
<dkelvey at hotmail.com>
If I were doing it.
First you need to find out if it needs OC output.
There are many flash parts in surface mount that can have the higher
speeds.
Add some 74LVC245 to give bus drive needed, also
surface mount.
All on a little PC board. There would be a lot of wasted space in the
flash
but what the heck.
Put an edge connector on the board to deal with
programming.
All will fit in a smaller space than the original part.
Dwight
That would be great engineering fun! But at less than $4 for the blanks,
using the old PROMs and the vintage programmer seems pretty
straightforward,
vintage correct, and low risk solution. Miraculously, my best offer got
accepted on ebay, so semi-affordable vintage clunky Data I/O 29B Programmer
and plenty of blanks are being shipped to me :-). I count collecting
vintage
tools for servicing your vintage machine as part of the fun too...
Marc