I see what the problem is. SLIC is partly below 1DF00 in system module. We now know that area often gets changed in RAM making a SLIC there no longer valid. I'll redo it with SLIC in a different location.
What you would do in that case is up to you. (I didn't mean that I had a plan, but that you should have a plan.) First of all it's a good idea to backup anything important to a flash drive or external hard drive so you would have access to the data if the computer was temporarily unusable. Recovery options include try to flash the original bios with a bootable floppy disk, try to force the bootblock to initiate a flash, hotswap the bios chip with a compatible motherboard and flash it, order a preprogrammed bios chip, rma the motherboard. I checked previous version of your bios and it has the identical module at the end with no extra code after it, so I don't think the extra code is for anything. If you'd rather use the previous version we can mod it instead.