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Changes in v1.8.6 (4/14/2003) (brianp)

Browse source 
- Fixed a bug in fathelp.asm where is wasn't adding the hidden sector
  count before performing a subtraction.

svn path=/trunk/; revision=4539
This commit is contained in:
Brian Palmer 2003-04-15 02:15:54 +00:00
parent 1a884ce84d
commit b4d0aca25a
3 changed files with 24 additions and 17 deletions
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5
freeldr/freeldr/CHANGELOG
View file

@ -1,3 +1,8 @@
Changes in v1.8.6 (4/14/2003) (brianp)
- Fixed a bug in fathelp.asm where is wasn't adding the hidden sector
count before performing a subtraction.
Changes in v1.8.5 (4/10/2003) (ekohl)
- Added support for binary system hive.

32
freeldr/freeldr/arch/i386/fathelp.asm
View file

@ -1,6 +1,6 @@
; FATHELP.ASM
; FAT12/16 Boot Sector Helper Code
; Copyright (c) 1998, 2001, 2002 Brian Palmer
; Copyright (c) 1998, 2001, 2002, 2003 Brian Palmer
@ -195,28 +195,30 @@ GetFatEntry12_Done:
; Otherwise CF = 0 for FAT16
IsFat12:
mov bx,[BYTE bp-DataAreaStartLow]
mov cx,[BYTE bp-DataAreaStartHigh]
; CX:BX now has the number of the starting sector of the data area
mov ebx,DWORD [BYTE bp-DataAreaStartLow]
; EBX now has the number of the starting sector of the data area
; starting from the beginning of the disk, so subtrace hidden sectors
sub ebx,DWORD [BYTE bp+HiddenSectors]
xor dx,dx
xor eax,eax
mov ax,WORD [BYTE bp+TotalSectors]
cmp ax,byte 0
jnz IsFat12_2
mov ax,WORD [BYTE bp+TotalSectorsBig]
mov dx,WORD [BYTE bp+TotalSectorsBig+2]
mov eax,DWORD [BYTE bp+TotalSectorsBig]
; EAX now contains the number of sectors on the volume
; DX:AX now contains the number of sectors on the volume
IsFat12_2:
sub ax,bx ; Subtract data area start sector
sub dx,cx ; from total sectors of volume
sub eax,ebx ; Subtract data area start sector
xor edx,edx ; from total sectors of volume
; DX:AX now contains the number of data sectors on the volume
movzx bx,BYTE [BYTE bp+SectsPerCluster]
div bx
; AX now has the number of clusters on the volume
; EDX:EAX now contains the number of data sectors on the volume
movzx ebx,BYTE [BYTE bp+SectsPerCluster]
div ebx
; EAX now has the number of clusters on the volume
stc
cmp ax,4085
cmp eax,4085
jb IsFat12_Done
clc

4
freeldr/freeldr/include/version.h
View file

@ -22,7 +22,7 @@
/* just some stuff */
#define VERSION "FreeLoader v1.8.5"
#define VERSION "FreeLoader v1.8.6"
#define COPYRIGHT "Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>"
#define AUTHOR_EMAIL "<brianp@sginet.com>"
#define BY_AUTHOR "by Brian Palmer"
@ -36,7 +36,7 @@
//
#define FREELOADER_MAJOR_VERSION 1
#define FREELOADER_MINOR_VERSION 8
#define FREELOADER_PATCH_VERSION 5
#define FREELOADER_PATCH_VERSION 6
PUCHAR GetFreeLoaderVersionString(VOID);