So if you have the GPIB-232CT-A, in my case 181930G-01 Rev 001, there is
no advantage to the ROM upgrade?
How does this unit come apart? I'm assuming one or both of the nuts
holding the 232 or GPIB socket have to be removed. And I never did get a
reply as to what this upgrade does.
I got two of these. Actually I sold one. The first cost a whole dollar.
That pissed off a friend who wanted one. I swore he would get the next
one I find, and he was good for $50. That one cost $3. The last time I
played with it, there was something odd with CRLF on data. My friend
gave up and just bought the USB dongle from NI. Life is short. NI was
still doing the trade in program, where basically any NI controller
would get you half off. That may still be true. Basically they didn't
want customers going to Prologix and other vendors.
On 3/19/2012 4:52 PM, paul swed wrote:
A couple of answers.
The difference between the pass through and full controllers is significant
in the ease of use for my 2 cents. Well worth the effort.
Joe I have never seen a NI controller as you describe. What I have seen is
that NI seems to garner rabid interest even at flea markets.
I believe the cntrollers I have been finding are simply black boxes that
look like the old rs232 so no one thinks twice.
Even if they did not work the cases are very nice for projects.
Regards
Paul.
On Mon, Mar 19, 2012 at 7:33 PM, Joseph Gray<[email protected]> wrote:
Paul,
Thanks for that info. I'll keep an eye out for those models (cheap). I
guess my NI unit is too different to use that EPROM.
Joe Gray
W5JG
On Mon, Mar 19, 2012 at 12:42 PM, paul swed<[email protected]> wrote:
Hello to the group
Joe here are the exact model numbers that I have and do indeed work.
IOmega488a
IOtech Micro 488a
IOtech 488ex
IOtech serial 488a
Black Box 232 to 488a
If I would run across other units at $5 as I have in the past I would
indeed try the mod.
I think the key to the discussion is the MPU board needs to actually
have a
eprom socket.
Regards
Paul.
On Sun, Mar 18, 2012 at 1:56 PM, paul swed<[email protected]> wrote:
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<[email protected]>
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: [email protected] [mailto:[email protected]]
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<[email protected]>
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: [email protected] [mailto:[email protected]]
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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