EPROM / Cable adaptor
17-Jul-85 23:10:41
Sb: #85761-EPROM / Cable adaptor
Fm: Marty 70007,2246
To: Larry Holmes 72276,1666
Funny you should feel the 27256 is such a problem… tho it sure seems you
should know. It took me about a half hour to modify the software and hardware
of my color computer based ERPOM burners for the 27256. True, you have one
less control line (*prog is gone) but the OE line pretty much functions as a
Vpp line in programming mode.
In any case, for $2500 you BETTER have done it right!! There are hacker
one at a time programmers for $300 for the IBM that alledgedly do proper fast
programming of u to 27512's (ever see a spec sheet on a 27512?? I haven't).
My coco burner cost me $20, but then I had to hack on it considerably to make
it useful to me.
Don't get me wrong.. I understand that a lot of work has to go into a GANG
programer that must RIGIDLY meet manufacturers programming specs! I am WELL
aware that just getting the EPROM to READ and Verify is NOT the measure of a
well designed programmer!!! Ya gotta chuck enough electrons into those
fermented farads in that sucker so that it STAYS programmed!!
I just got the photograpy back on that adaptor.. and anticipate first test
of the board in a week or two.
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