Hi, Firstly, I've done all the obvious things:
Using a MAX232 for Pluto -> PC data line.
Serial I/O program on the FPGA board works fine.
RS232 levels and rise times on computer RxD are fine on a scope.
COM port on the machine concerned used constantly with other systems at 115K, without problems.
If I try to do a PROM burn on my laptop running XP it works fine.
With identical load file, cable, interface and FPGA Pluto-3 board on my desktop, running Win-7 I consistently get a verify error.
FPGAconf version is the same for both. Failurs occur with proven rbf files, such as LEDflasher.
The only difference I can see is XP vs Win-7. Has anyonre experienced anything similar? Any other suggestions? TIA