Parallel Port eprom programmers - suggestions

Andrew K. Mattei amattei at mindspring.com
Tue Feb 9 14:53:22 GMT 1999


>  Are there any other
>  parallel port eprom programers that others have used?

Well, this is the Do It Yourself list... ;)

My justification is that my wife will let me "babysit" the new son, and
tinker with electronics all I want, but I'd get strung up if I spent
$200 on a programmer... So...

I'm now rolling my own LPT port programmer. Have the hardware design,
and have been flowcharting the software (Qbasic, of course!). Uses (2)
74HC4040 12-bit counter IC's (for addressing), a couple 74175's (latches
for outputs), a couple 74125's (latches for inputs), a 555 (for the 50
usec programming pulse), some dip switches, and some voltage regulators.
I'm building it for 128k and 256k eproms, but it's adaptable. ;) I found
a design on the 'net, built it, but have had mucho problems with it.
Hopefully this "adaptation" will fix those problems.

Hope to have it documented in a couple weeks. I have all the parts, it's
just a matter of rolling it together. And unlike others, this should
work on all standard parallel ports. I plan to use an old 8088 Toshiba
laptop to run it. ;) "The diskless wonder". Anyone got any 3 1/2" 720k
floppies laying around? (JOKE!)

FWIW,

Andrew "throwing nickels around like manhole covers - urrrrgh!" M



More information about the Diy_efi mailing list