17 Jul
2019
17 Jul
'19
4:15 p.m.
On Jul 17, 2019, at 3:56 PM, Eric Smith via cctalk
<cctalk at classiccmp.org> wrote:
I expect that 70ns doesn't meed the DEC purchase specification for
23-000A9-01, but unless we turn up a copy of the actual purchase
specification, we won't really know. It seems likely that the purchase
specification would have required 55ns, as that was a very common "slow"
speed grade for bipolar PROMs.
Also, while bootstrap PROMs may not necessarily need anything faster than 70ns (I seem to
recall seeing a comment in the M9301 docs about 70ns being the minimum speed, but I may
have made that up), faster PROMs may have been needed in other places where they were used
as logic gates.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/