I needed a util to program large SPI mode 3.3 Volt EEPROMs (capacity 128KB to 1MB) and because the usual suspects (ic-prog etc) didn't seem to support them, I ended up writing my own. If its of any use to anyone else, feel free to use it..

It's for REAL MODE DOS (cus Windows direct I/O is a mare) so a boot disk is in order. On the plus side it can be reconfigured to use whichever parallel port / pins / polarity is required by your PC to SPI interface (I've included a schematic / PCB mask for the interface I've been using in the archive).

At present the util supports the following ICs: 25x10 (128KB), 25x20 (256KB), 25x40 (512KB), 25x80 (1MB), but can easily be updated to program other SPI EEPROMs (that use the same protocol) by editing the config file.

Download: SPILEP.ZIP - Further details included in the readme.txt file.