Hi!
12--2004 14:30 [EMAIL PROTECTED] (tom ehlert) wrote to Luchezar Georgiev
[EMAIL PROTECTED]:
Only 0 and 80 are used by MS-DOS. All other values are FreeDOS extensions ;-)
te are you SURE ?
How strange. B-\ I receive this letter two minutes back, whereas I
answer yesterday to Lucho's
Although I dislike the idea of patching the bootsector, choice 2 does
seem most compatible and is slightly smaller boot code (as the logic is
moved to sys).
I agree and prefer method 2 too. The distance between this new patched
boot sector offset and the existing boot segment offset seems
Hello,
Award BIOS dated 1999 for Intel i810, and the original IBM PC/AT BIOS
don't seem to pass anything in DL on Int 19h. How did I verify it? For
those who can't guess, let this be my little secret ;-G
(Table 00653)
Values Bootstrap loader is called with (IBM BIOS):
CS:IP = h:7C00h
DH =
The BIOS Boot specification warns that only 0 and 80h can be [...]
[...] interesting enough... Nevertheless, trying it gives me 404...
Moved -
http://www.phoenix.com/NR/rdonlyres/56E38DE2-3E6F-4743-835F-B4A53726ABED/0/specsbbs101.pdf
---
This
Hi!
13--2004 12:48 [EMAIL PROTECTED] (Luchezar Georgiev) wrote to
[EMAIL PROTECTED]:
My AwardBIOS here for example does have such a feature. However, when I
look at the boot record of my second hard drive, I see again boot drive
= 80.
Do you try to boot from second drive with this boot
Ie., second disk was enumerated as 80h (and, for example, partitions
from it was labeled earlier, than from first disk)?
Yes, exactly.
This warning may be only because authors of tose spec may know about
existance of buggy BIOSes.
No, they state several times that ONLY 0 AND 80 may be boot
Hi!
13--2004 19:55 [EMAIL PROTECTED] (Luchezar Georgiev) wrote to
[EMAIL PROTECTED]:
This warning may be only because authors of tose spec may know about
existance of buggy BIOSes.
LG No, they state several times that ONLY 0 AND 80 may be boot drives.
Ok. What about boot managers?
No,
Hi!
12--2004 14:08 [EMAIL PROTECTED] (Luchezar Georgiev) wrote to
[EMAIL PROTECTED]:
I don't understand this. SYS writes 0/FF only into its own images,
builtin into SYS executables. And, if _after_ SYS someone will change
boot loader, then 0/FF value also will be replaced. Where is trouble?
Hi!
10--2004 20:05 [EMAIL PROTECTED] (Luchezar Georgiev) wrote to
[EMAIL PROTECTED]:
LG brain-dead BIOSes if the boot drive is A: (but not if it's C:), the FF
LG value written to by SYS causes a compatibility problem. What happens if
LG someone decides to overwrite our boot sector later with a
I don't understand this. SYS writes 0/FF only into its own images,
builtin into SYS executables. And, if _after_ SYS someone will change
boot loader, then 0/FF value also will be replaced. Where is trouble?
The trouble is that most SYSes don't bother to set this value - they just
copy the whole
Hello Luchezar,
D:==second disk? Second disk is a 81h value.
Only 0 and 80 are used by MS-DOS. All other values are FreeDOS
extensions ;-)
are you SURE ?
I remember a BIOS that had the option to boot from 2'nd drive.
this only makes sense if DOS then boots from 0x81.
tom
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