John Baldwin wrote:
> No. It's the offset in memory of the number of hard drives in the BIOS. The
> BIOS has a data segment at 0x40, and at 0x40:0x75 (whose physical address is
> 0x475) it has a byte which is a count of the number of hard drives installed.
Specifically, Hiten, see:
Page 4-9, table 4.002 "BIOS Memory Usage Summary"
The Programmers PC Sourcebook
Thom Hogan
Microsoft Press
ISBN: 1-55615-321-X
Or:
Page 505, Table 11-9 "Hard Disk BIOS Data"
The Undocumented PC
Frank van Gilluwe
Addison-Wesley
ISBN: 0-201-62277-7
Seriously, you probably do not need to know how this works. If you
are interested enough in PC hardware, and just want to know, you
could do worse than buying one or both of these books.
You might also want to do a web search for "Ralf Brown Interrupt List".
-- Terry
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