The Willem Eprom programmer is good documented at http://www.willem.org, but I missed some things.
Willem, you may take this information to your site. It is here just to say "What I missed".
The electric schema was not that readable as I expected. ( Too much signals hide in labels, especial at the 12-way DIP-switch. Address and data lines in the same bus, other signals in the very same bus. No text at parallel port connector ) So there is a redraw of the schema
For parallel EPROM like 27Cxx, 28Fxx, 29Fxx and such
uniprog at savanah
For serial EPROM like 24Cxx, 25Cxx, and 93Cxx
still unknown
For Microchip PIC 12C and 16F84
still unknown