[time-nuts] IOTECH 488 EPROM

J. L. Trantham jltran at att.net
Sun Mar 18 16:13:19 UTC 2012


Joe,

I have not tried it but I could.

I guess I would download the file from Didier's site, program the EEPROM and
give it a shot.  It's a 64 KB EPROM going to a 256 KB EPROM.  Doesn't sound
right to me.

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 11:04 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IOTECH 488 EPROM


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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