Looks perfect for replacing some hard-to-find TTL PROMs; Thank you!!! On Thu, Mar 13, 2025 at 4:00 PM Glen Slick via cctalk <cctalk@classiccmp.org> wrote:
> On Thu, Mar 13, 2025, 12:37 PM Mike Stein via cctalk < > cctalk@classiccmp.org> > wrote: > > > ISTR that some time ago I read mention here about an EPROM fast enough to > > approach PROM speeds; anyone share that recollection, or even have a > > source/part no.? > > > > How big and how fast? Cypress made some 15ns UV eraseable parts, for > example CY7C245A-15WC > > > http://www.bitsavers.org/components/cypress/_dataBooks/1995_Cypress_High-Performance_Data_Book.pdf > Chapter 4 > > I have some CY7C291A-35WC parts I bought to upgrade the microcode of an HP > 1000 A900 12201-60001 Sequencer Card. (Haven't gotten around to doing that > yet). > > > >
