- a rom extension starting in the 0xdxxxx space must end at max. 0xdffff - don't create a checksum for BIOS extensions without signature at 0xe0000
- a rom extension starting in the 0xdxxxx space must end at max. 0xdffff
- don't create a checksum for BIOS extensions without signature at 0xe0000

marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet