WTD: Fuse PROM programming algorithms

[Dave McGuire]

On Feb 13, 2007, at 2:31 PM, Philip Pemberton wrote:
>> Why not just buy a used DATA I/O 29B or 29A with a UniPak? This  
>> machine will burn almost every PROM that was made...and they are  
>> fairly cheap on eBay these days. In my shop I have three of these  
>> units. Two are backups if the main machine ever fails.
>
> Because I don't need another huge, power-hungry piece of kit lying  
> around.

   Huh?  The 28/29 family is far from huge...about the size of three  
average phone books stacked atop one another.  I strongly advocate  
building one, though, because it's cool, and a valuable experience.   
Far too many people nowadays would rather sit on their asses, drink  
watery beer, and watch other people play a game than actually CREATE  
something.  I applaud your efforts.

   But I still say the Data I/O 29B is a very small box. =)

> Plus I suspect I could build a PROM programmer out of stuff in my  
> junk box, it's just that I can't get my mitts on the datasheets for  
> the chips. TI are nice enough to put their programming algorithms  
> online, I've found a textual description of the NatSemi algorithm  
> (though it would be nice to have the timing diagrams, if any), and  
> I tracked down an old rev of the 82S129 datasheet that includes  
> some info on the Signetics Generic I algorithm. Those three would  
> be enough to get by on for now, but it would be nice to have read  
> and write support for e.g. the Intersil and Monolithic Memories chips.
>
> As dictated by Sod's Law, I've got the Intersil linear databooks,  
> but not the logic/PROM/whatever databook. As far as MMI goes, I  
> can't even find a copy of the relevant databook for sale, hence why  
> I asked for scans or photocopies (I'm not fussy about which, and  
> I'm willing to pay for the copying and shipping/postage).

   I *might* have an MMI databook; I will do some digging.

           -Dave

-- 
Dave McGuire
Port Charlotte, FL