(Response to Petrus Bitbyter in sci.eletronics):
Original message:
I constructed the EPROM Emulator published in Elektor magazine in the SEPTEMBER 1992 issue. It worked quite well under Win98, but lately I started using it on a HP Compaq nx9010 Pentium 4 laptop using WinXP, and am getting inconsistent results. The downloading of code into the target works successfully 1 out of 10 attempts. When the download fails, the download LED flickers on and off. When the download was successful, the LED stayed on continuously.
Any ideas? I tried changing the parallel port mode on the laptop to Output Only, Bidirectional, EPP and ECP but no change.
Thanks
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Follow-up:
I might be referring to the wrong Elektor article - the article I referred to is the one NOT using a Windows driver, i.e. I download my object code using a DOS command line copy command in binary format i.e.
copy lpt1 /b
Regards