Received my new GQ-4X EEPROM Programmer from Canada, forgot the 16-bit adapter card though! All USB based which is certainly helpful as I didn’t want to pull out a computer with a parallel port each time – not that it couldn’t have been done, there’s enough lying about at the moment.
Anyway, I performed some test reads and writes using only USB 5V and it seems to have worked OK. I do need to get an external power adapter though to power the higher voltage writes. Seems to be reverse polarity to a Mega Drive adapter yet all other specs are within range. Scissors anyone? Don’t worry, they are third-party adapters.
I hope to one day flash some chips for use in my Dreamcasts and Saturns for region free gaming. Apart from that dumping prototypes and chips on various boards is the goal. I am surprised at how easy it was to dump, erase and flash a chip for a 486 BIOS. The best news is that it worked and the BIOS was functional.