[time-nuts] IOTECH 488 EPROM

J. L. Trantham jltran at att.net
Sun Mar 18 15:38:44 UTC 2012


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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