I've designed an Eprom programmer that I can connect on a parallel port. It is intended to program 2764, 27128 and 27256 eproms with a 12.5V vpp (because these are the chips I've got on SM90 and SPS7 computers).

I've realized the double-sided board, wrote the GNU/Linux driver, and a simple utility that burns 2764, 27128 and 27256 eproms using the driver (by writting to /dev/ppep0 device).

The Parallel Port Eprom Programmer has now its own site with more information and CVS repository.