kjh@pollux.usc.edu (Kenneth J. Hendrickson) (08/25/90)
If anybody has any information on the format for a ROM BIOS EXTENSION, would you please email me the information, or where to find it. Thank you. I know this is the wrong group, and I did post to comp.sys.ibm.pc, but I also posted here in the hopes of finding some knowlegable individuals. cat flames >/dev/null & -- Ken Hendrickson N8DGN/6 kjh@usc.edu ...!uunet!usc!pollux!kjh
wilker@descartes.math.purdue.edu (Clarence Wilkerson) (08/25/90)
The beginning bytes are 55(hex), aa(hex), # of 512 byte pages in rom, and at position 3, a jump to the initialization code. The 8 bit checksum over the entire image should be zero. Anything else is up to you. Commonly, interrupt vectors are set and hardware initialized, and interrupt routines are in the rom.