Old MS-DOS & WIN Software

[Chuck Guzis]

On 12/4/2005 at 11:48 AM Gil Carrick wrote:

>According to Peter Norton, the BIOS code in a PC scans memory starting at
>C000 and looking at every 2K block for the signature 0x55AA. (

Having written some of my own BIOS extension code, this comes as no
surprise.  But  I was speculating about the likelihood of a "custom"
becoming a de facto standard.  In other words, it seems that all VGA/EGA
adapters put BIOS code at C000:0, but are the authors of any OS or PC BIOS
sufficiently benighted to insist that it always must be at that location?

Cheers,
Chuck