Date: Wed, 12 Jul 2000 11:11:55 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/boot/i386/boot0 Makefile boot0.s Message-ID: <200007121811.LAA81651@freefall.freebsd.org>
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jhb 2000/07/12 11:11:55 PDT
Modified files:
sys/boot/i386/boot0 Makefile boot0.s
Log:
The new and improved boot0, v1.1. This version adds the following:
- Autodetection and support of the BIOS EDD extensions to work around the
1024 cylinder limit on all but really ancient BIOS's.
- To work around some BIOS's which break when EDD is used with older drives,
we only attempt to use EDD if the cylinder is > 1023.
- Since this new code required more space than we had left, expand boot0 to
2 sectors (1024 bytes) in length.
- Add support for boot0 being multiple sectors using predefined constants.
If boot0 needs to be extended in the future, all that is required is
bumping the NUM_SECTORS constant.
- Now that we have more room to work with, add a few more fs type
descriptions while making others more verbose.
Revision Changes Path
1.10 +3 -2 src/sys/boot/i386/boot0/Makefile
1.17 +214 -76 src/sys/boot/i386/boot0/boot0.s
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