>> I ran Nigel's test on the programmer and I see the following: >>When I set the port to $0378 (the parallel port I actually have it hooked to): >> When I toggle Data, In also toggles IF VDD is high. If VDD is low, then In >>doesn't toggle along. >>All of the other inputs can be toggled with no effect on any either signal. > >That sounds like it's working OK, as the VDD signal also switches the >pull-up resistors for the open collector gate you need to have VDD >turned on. > >Try checking with a volt-meter on the actual pins of the PIC, you should >see the voltages change when you toggle the data and clock lines. I did, everything changed along with the screen. However, VDD and VPP were inverted from what the screen said (with the most recent DOS version.) >I've forgotten now what your problem was :-), was it that it wouldn't >detect the hardware?. What version of the software are you using, one of >the earlier versions had a problem on fast machines!. It is that it couldn't detect the hardware. This is a *BRAND NEW* problem. The hardware has worked like a charm for months and now all of a sudden the PC says it can't find it. I have tried a different PC. Can you tell me the exact sequence that the programmer software uses to look for the hardware. The only thing that I can figure is that something broke somewhere. Thanks in Advance, Alan G. Smith +--------------------------------------------------------- | Alan G. Smith | ags@poboxes.com | http://www.innovatus.com/ags