Hello to the group. Indeed the prom changes the behavior to a full controller and the ones I listed were changed and worked. Because those were the units I had found over the years. No idea about this particular prom and such. Regards Paul WB8TSL
On Sun, Mar 18, 2012 at 10:12 AM, J. L. Trantham <jlt...@att.net> wrote: > Joe, > > The NI GPIB-232CV-A uses an ST M27C256B-15C1 One Time PROM in a PLCC 32 pin > package. However, a Winbond W27E257 EEPROM is a pin for pin substitute. > The M27C256B and the W27E257 both come in a 28 pin DIP package (0.6 > spacing) > so you should be able to use a programmer with that chip support and a DIP > to PLCC adapter, wired appropriately, to do the programming. The 28 pin > DIP > packages are UV erasable. I've never seen a PLCC UV erasable package. Do > they exist? > > In any event, I can program the chip for you if needed. I have some spare > W27E257P-10 chips and can burn one for you as well and send it to you if > needed. I am in Northwest Florida. > > Joe > > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Joseph Gray > Sent: Sunday, March 18, 2012 2:18 AM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] IOTECH 488 EPROM > > The text file accompanying the EPROM file on KO4BB's site mentions > using this EPROM image with a NI controller. I have a NI GPIB-232CV-A. > Can I use the image with this controller? If so, I assume that I then > have the equivalent of an IOTECH controller? > > I partially disassembled my GPIB-232CV-A and from peering between the > boards, it looks like the EPROM is a PLCC. I can't burn one of those. > If I can use this image with my controller, can someone burn a chip > for me? I'll pay for the chip and shipping, of course. > > Joe Gray > W5JG > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.