Date: Wed, 5 Jan 2005 01:36:06 +0000 From: Peter Edwards <peadar.edwards@gmail.com> To: Julian Elischer <julian@elischer.org>, current@freebsd.org Subject: Re: Is there a boot sector guru in the house? Message-ID: <34cb7c840501041736570afdfa@mail.gmail.com> In-Reply-To: <41DAF53A.5000300@elischer.org> References: <41DA2AE0.3020108@elischer.org> <20050104.032929.102142020.imp@bsdimp.com> <20050104114308.D30830@maren.thelosingend.net> <41DAF53A.5000300@elischer.org>
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I don't have a box I can test this on, but this looks like a definite
candidate to get
3 more bytes:
--- boot0.S 24 Nov 2004 15:39:04 -0000 1.12
+++ boot0.S 5 Jan 2005 01:27:31 -0000
@@ -314,8 +314,7 @@
cmpw $MAGIC,0x1fe(%bx) # Bootable?
jne main.10 # No
pushw %si # Save
- movw $crlf,%si # Leave some
- callw puts # space
+ callw putn # Leave space
popw %si # Restore
jmp *%bx # Invoke bootstrap
If my arithmetic is correct, that leaves us wanting one more byte.
I don't get the save/restore of %si at the end, and judging by the
comment, someone else didn't either. It could be of some use to the
chained loader, but our boot1.S doesn't do anything with it.
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