Re: Looking for programming algorithm for Harris 7685 PROM
- From: Nermal <nermal1@xxxxxxxxxxxxx>
- Date: Sat, 10 Feb 2007 14:27:04 GMT
That brings back old memories. All of our old Harris data books have been trashed. Harris had a big problem with all of their PROMs: they grew back after programming. We quit using them for that reason.
The first Data Books from Harris gave instructions on the programming protocol. The book indicated that these were the easiest and most forgiving devices (as far as programming parameters) in the industry.
These PROMs were the opposite of convention: they were shipped all ones vs all zeros. The later data books indicated that the programming parameters were more critical. At the end even Harris was unable to supply us with programmed PROMs what did not grow back.
Michi wrote:
Hi,.
i have to program some PROMs for a HAM-Radio equipment. I have
M3-7685-5 PROMs (2048x4) from Harris which are pin- and read
compatible (but not write compatible) with 82S185 and others.
But, because i have no PROM-Programmer, i will build one by myself. So
i am looking for a Data*** or/and a specification of the programming
algorithm for the Harris 7685 PROM.
Is anyone out there who has an old Databook from Harris ?
Many Thanks. Michi
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