How can I hack the "checksum" in my TNT bios?
I would like to change the signon message of my Hercules Dynamite TNT video-card.
I've dumped the bios and changed the signon message with a hexeditor. But when I flash with my changed bios, the system doesn't boot, and I have to use a second pci video-card to flash my old bios back.
Even when I only change one little sign!
So I think there must be some kind of checksum in this bios, since my friends all succeed in changing their signon message (but they're using TNT2 and Geforce card's)!
So, does anybody know where I can find the checksum, and, more important, how I can change it?!