ADV: EDD "write with verify" is AL=01h or AL=02h, not AL=80h
authorH. Peter Anvin <hpa@zytor.com>
Thu, 30 Apr 2009 22:55:29 +0000 (15:55 -0700)
committerH. Peter Anvin <hpa@zytor.com>
Thu, 30 Apr 2009 22:55:29 +0000 (15:55 -0700)
commitbdbc445ccd0fb075f2e13b4f6e82067e8ae6f217
tree553fdc556ccd633f1cdf7f4d3cc1c51311fd900f
parent0237ad66429722f9653fd274e2b978ff4cc374e5
ADV: EDD "write with verify" is AL=01h or AL=02h, not AL=80h

The "write with verify" functionality in EDD is AL=01h or AL=02h
depending on EDD version, not AL=80h.  Since it is apparently
version-dependent, don't even try to do it; furthermore, some BIOSes
are known to reject a write with this feature requested no matter
what.  At some point we may want to explicitly read back to verify.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
core/adv.inc