[time-nuts] IOTECH 488 EPROM

[Joseph Gray]

The text file doesn't mention any particular model numbers, it just
lists "NI", along with others. I want to make sure that the NI
GPIB-232CV-A will work with the other firmware. Has anyone done this
specific model?

Joe Gray
W5JG

On Sun, Mar 18, 2012 at 8:38 AM, paul swed <paulswedb at gmail.com> wrote:
> 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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