From 0e7300b1a83bfbe89cf6c33d7ca20be0bd6bb7db Mon Sep 17 00:00:00 2001 From: Thomas Schmitt Date: Mon, 10 Apr 2017 10:02:05 +0200 Subject: [PATCH] Clarified meaning of MBR partition boot flag --- doc/boot_sectors.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/doc/boot_sectors.txt b/doc/boot_sectors.txt index 9e31f50..37737ad 100644 --- a/doc/boot_sectors.txt +++ b/doc/boot_sectors.txt @@ -340,8 +340,11 @@ Byte Range | Value | Meaning | | 446 - 461 | ========== | Partition Table Entry for partition 1 | | - 446 - 446 | status | Governs bootability: - | | 0x80 = bootable/active , 0x00 non-bootable/inactive + 446 - 446 | status | For some generic MBRs this marks the one partition + | | from which the MBR should load and run more code. + | | 0x80 = bootflag/active , 0x00 = noboot/inactive + | | Some BIOSes ignore MBRs with no bootflag in any of + | | their partition table entries. | | 447 - 449 | ========== | C/H/S address of partition start 447 - 447 | start_head | Heads part of start address.