MdeModulePkg: INF/DEC file updates to EDK II packages

[mirror_edk2.git] / DuetPkg / BootSector / bootsect.asm

diff --git a/DuetPkg/BootSector/bootsect.asm b/DuetPkg/BootSector/bootsect.asm
index 8fb7236bc1793f9f9f30c12a05d2ec56ffbae4e1..3366b7acf73fb2d13232f9d0a225b7071b12090a 100644 (file)
--- a/DuetPkg/BootSector/bootsect.asm
+++ b/DuetPkg/BootSector/bootsect.asm
@@ -1,7 +1,7 @@
 ;------------------------------------------------------------------------------\r
 ;*\r
-;*   Copyright 2006 - 2007, Intel Corporation                                                         \r
-;*   All rights reserved. This program and the accompanying materials                          \r
+;*   Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>\r
+;*   This program and the accompanying materials                          \r
 ;*   are licensed and made available under the terms and conditions of the BSD License         \r
 ;*   which accompanies this distribution.  The full text of the license may be found at        \r
 ;*   http://opensource.org/licenses/bsd-license.php                                            \r
@@ -9,9 +9,22 @@
 ;*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
 ;*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
 ;*   \r
-;*    bootsect.asm\r
-;*  \r
-;*   Abstract:\r
+;*   bootsect.asm\r
+;*    \r
+;*   bootsect.asm is built as 16-bit binary file in 512 bytes and patched to disk/partition's \r
+;*   first section - boot sector. \r
+;*\r
+;*   The startup sequence for DUET disk boot sector is:\r
+;*\r
+;*   1, LegacyBios check 0xAA55 signature at boot sectore offset 0x1FE to judget \r
+;*      whether disk/partition is bootable.\r
+;*   2, LegacyBios will load boot sector to 0x7c00 in real mode, pass BPB data and\r
+;*      hand off control to 0x7c00 code.\r
+;*   3, boot sector code simply parse FAT format in boot disk and find EfiLdr binary file \r
+;*      and EfiVar.bin if exists. For first boot, EfiVar.bin does not exist.\r
+;*   4, boot sector load the first sector of EfiLdr binary which is start.com to\r
+;*      0x2000:0x0000 address.\r
+;*   5, boot sector handoff control to 0x2000:0x0000 for start.com binary.\r
 ;*\r
 ;------------------------------------------------------------------------------\r
 \r