Adopt a terser specification of an MBR partition table of
64 zeros, suggested by miod@ a while ago.

ok mlarkin@

drop detection code for 386sx/386dx CPUs

OpenBSD/i386 doesn't actually support running on 386sx or 386dx CPUs
so we don't need to test whether we're running on one of these CPUs
anymore.

The 486 (w

drop detection code for 386sx/386dx CPUs

OpenBSD/i386 doesn't actually support running on 386sx or 386dx CPUs
so we don't need to test whether we're running on one of these CPUs
anymore.

The 486 (which was launched in 1989) added a few new features over
the 386:
- an alignment check flag in EFLAGS
- 3 new userland instructions: bswap / cmpxchg / xadd
- 3 new kernel mode instructions: invd / wbinvd / invlpg
- new bits in CR0 (386 CPUs did not support ring0 write protection)
- new bits in CR3

In this diff, we remove the code that checks for the alignment check
flag as we've only supported Pentium (or newer) CPUs for some time.

The rest of the diff is about updating comments related to pre-486
CPUs. 2 files under arch/amd64 are updated to keep them in sync
with the arch/i386 updates.

ok mlarkin@, jsg@; tweak from miod@

show more ...

Delete the ancient "hold Shift key to force CHS" code. Noone has needed
this in decades.
ok sthen krw

fdisk(8) no longer uses the partition table it finds in
/usr/mdec/mbr. Make the partition table all zeros and
see if any hidden uses fall out.

ok deraadt@

Fix serial port output.

OK weingart@

Remove unused define CHAR_CHS_FORCE.

OK deraadt@

"of of" is wrong - it should be "off of" - but "from" is even nicer

Enable interrupts before halt when we error out. Allows use of
Ctl-Alt-Del to reboot in case of failure.

Much testing nick@; thanks.

ok weingart@, deraadt@.

Major overhaul of our master boot record.

We now use EDD calls if the disk supports it, so we can boot partitions
that start above the 8 GB CHS limit. Of itself, this change does not
remove the cur

Major overhaul of our master boot record.

We now use EDD calls if the disk supports it, so we can boot partitions
that start above the 8 GB CHS limit. Of itself, this change does not
remove the current 8 GB limit for OpenBSD/i386.

Much testing nick@; thanks.

ok weingart@, deraadt@.

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three four kills

i386 ELF bootloader. developed with weingart@

Fix 16 vs. 32-bit mismatch. Solves the most common MBR hang.
This is from Mickey's tree. I inadvertently committed it
without his permission last time. ok mickey@

first i gave you one of the reasons it mmakes thing better.
second i did not see the final diff.
third i never said you should commit this.
fourth, 10x for running around offending lusers i'm
trying

first i gave you one of the reasons it mmakes thing better.
second i did not see the final diff.
third i never said you should commit this.
fourth, 10x for running around offending lusers i'm
trying to resolve their problems with.

show more ...

Fix a long-standing alignment bug by removing the 32-but call/return
on Lchr. Notice Lmessage is using Lchr's return, and it has always
been a 16-bit call.

This should be the root of many (most?) of

Fix a long-standing alignment bug by removing the 32-but call/return
on Lchr. Notice Lmessage is using Lchr's return, and it has always
been a 16-bit call.

This should be the root of many (most?) of the Drive:0 Partition:3
hangs.

tip o the hat to mickey, who fixed it without necessarily knowing it,
and toby, who put the final nail in.

gas sucks.

show more ...

remove wrong end of comment which breaks compilation with -DSERIAL
enabled

define puts()

don't use private defines, use ones exported from includes

reuse ret code for both message and chr
some tab adjustment (4-pos tab is not good ;)

typo

Fix boot message

Sync up

Temporary fix

More pedantic

Thanks Niklas (nuke push/pop)

grammar