21MX proms (per request
glen.slick at gmail.com
Tue Sep 8 21:38:02 CDT 2015
On Tue, Sep 8, 2015 at 1:19 PM, Sean Caron <scaron at umich.edu> 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. Hopefully your best offer successfully accepted was much lower!
> I think the part cost on the PROMs pales in comparison.
You can currently buy a BP Microsystems CP-1128 for $38.50 shipped on eBay:
For the HP 21MX PROMs being discussed it supports at least the following:
256x4 tri-state output
82S129 / 82S129A
512x8 tri-state output
1024x8 tri-state output
82S181 / 82S181A / 82S181B / 82S181C
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