[time-nuts] IOTECH 488 EPROM

[paul swed]

Joe
Its been a while since I posted those eproms and info.
I need to do 2 things. Look specifically at my models tested and listed and
see what that means in the context of your question. Perhaps later today.
Regards
Paul.
WB8TSL

On Sun, Mar 18, 2012 at 11:38 AM, J. L. Trantham <jltran at att.net> wrote:

> Paul,
>
> Have you tried this in an NI GPIB-232CV-A or a GPIB-232CT-A?  I have tried
> to swap the data between a 232CT-A and a 232CV-A with no joy.  The two
> units
> are fundamentally different.
>
> That's why I have the chips.
>
> Joe
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of paul swed
> Sent: Sunday, March 18, 2012 9:38 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] IOTECH 488 EPROM
>
>
> 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 <jltran at 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-bounces at febo.com [mailto:time-nuts-bounces at 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
> >
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