I bought my programmer used, and it worked great on 27C256 chips, and 27C128 chips in Windows mode, and I had to shut down to DOS for 29C256 chips. But when I started doing 2732A TBI chips, the programmer wouldnt work at all. I sent it back to Xtronics for repair, and just received it yesterday. Today I try it out again, and find it'll do 2732A TBI chips just fine, but when I program 27C256 or 29C256 chips, they give a PROM error in the computer when I install them in the car. Great, I just traded one problem for another. Time to call Xtronics and send it back again.


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
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-=ICON Motorsports=-

 

I'm having the same problem...I think it's something simple we're overlooking in the set-up selection in the EPROM software.

V/R,
Frank

 

try to program your flash chip(29c256) with a slightly different voltage, like try to program it with a 27c256 setting, then go back to the 29c256 setting and reprogram, see if that works, for SOME REASON. I have to do this exact procedure WHENEVER I open up the fileprom program initially. Once I've done this it will program all day unless my little 386/25mhz laptop locks up or something...


Brendan

 

I tried programming with my desktop computer and it worked, so maybe its something in my laptop? That sucks... Anyway, it seems to be working now, when using the desktop computer.

 

Kevin,
Did you try what I suggested? I seem to have the problem with my laptop but not my desktop.

Brendan

 

I think I figured it out. I changed the parallel port in the BIOS to bi-directional, then deleted the parallel port in Windows, and let it re-detect it, on my laptop. So far its burned both 2732A and 27C128 chips with no problems. I'll try my 27C256 and 29C256 chips tomorrow.