I also have the Data I/O 29B with Unikpak (and the logicpak) but I don't think it programs the 2716a's which require 21v - but you're right it's a pretty reliable beast. I just wish it fit nicely in my desk drawer like my Dataman does. Anyway, after reading this discussion <http://www.eevblog.com/forum/chat/what%27s-up-with-2716-eproms/> I decided to try reprogramming a couple of times and it finally worked. Matt On 2/15/2013 10:12 AM, John Robertson wrote:
Matthew Rossiter wrote:
So, in continuing this discussion on techtoolslist - I found that I was only about to program a couple more 2716a's and the rest failed. Then I realized that sometimes I had to program them two or three times until they finally verified correctly. Has anyone else run into this issue?
Matt
I've had trouble too with these vintage Eproms, 2716s seem to not like being re-programmed much. Fortunately have a hundred or so of pulls so I just chuck the duds into a box marked 'erase' to try again later. I suspect they are simply failing due to age.......
I'm using a Data I/O 29B with Unipak, as it is my most reliable programmer for that vintage of parts, plus I have spare units as backups. I have about a dozen programmers all together I guess, going right back to the 1702s.
John :-#(#
On 1/31/2013 10:16 AM, Matthew Rossiter wrote:
Oh Boy. Ok - so these all passed the blank check when they arrived. But I thought, what the heck I'll run them through the UV eraser just to make sure they're blank. Now I can program them.
As Gilda Radner would say - Nevermind.
Matt
On 1/31/2013 9:51 AM, Matthew Rossiter wrote:
Well fortunately, these eproms have 21V written on the top of them so it's not hard to miss. I'm using a Dataman-48Pro+ where they give you the specs of a generic 2716A and yes it's set to program at 21v. I'm not sure if there's anything special about STMicro's. Normally what I do is try to find the datasheet, send it over to Dataman and they usually fix the problem. But I can't find a datasheet anywhere on the net.
There's also the possibility I have some bad devices. :| I only did a quick search but I don't think the Data IO 29B does them either. I'll double check. I'd love to find a datasheet though.
Matt
On 1/31/2013 9:27 AM, John Robertson wrote:
Rodger Boots wrote:
BE CAREFUL, 2716s program using 25 volts but what you have uses 21 volts.
On Jan 31, 2013 12:16 AM, "Matthew Rossiter" <matt@rossiters.com <mailto:matt@rossiters.com>> wrote:
Does anyone have the datasheet for the ST Microelectronics eprom M2716A-2F1? I bought them from Jameco but I can't seem to program them. They are fast 200ns eproms.
Matt
Programming a 21V 2716A (that is what the "A" means) on a 25V programmer will normally destroy the Eprom. This is also the difference between the 2732 (25V) and 2732A (21V).
If you can't find the exact manufacturer and part number on your list of Eproms that came with your programmer then you MUST find out exactly what the device needs and then determine what Eprom is closest to it so that its algorithm will work before attempting to program it. the devices from the 70s were very particular about voltages and timings, devices from the mid-80s and later usually to have code inside them that the programmer can recognize to figure out the programming voltage(s) required.
John :-#(# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"
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