From: H. Peter Anvin <hpa@zytor.com>
Date: Wed, 11 Nov 2009 23:52:37 +0000 (-0800)
Subject: dos: DOS version 7.10 is 0x070a, not 0x0710...
X-Git-Tag: syslinux-3.84-pre2~1^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e79ba125c9c8eb3816d164d86b5264b21868f7af;p=profile%2Fivi%2Fsyslinux.git

dos: DOS version 7.10 is 0x070a, not 0x0710...

Fix DOS version 7.10 (first FAT32-capable version) check.

Perhaps we should just call the FAT32 calls blindly and fall back to
the old calls if they fail?

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/dos/syslinux.c b/dos/syslinux.c
index 1cdf418..d054c4c 100644
--- a/dos/syslinux.c
+++ b/dos/syslinux.c
@@ -171,7 +171,7 @@ void write_device(int drive, const void *buf, size_t nsecs, unsigned int sector)
     dio.bufoffs = (uintptr_t) buf;
     dio.bufseg = data_segment();
 
-    if (dos_version >= 0x0710) {
+    if (dos_version >= 0x070a) {
 	asm volatile("int $0x21 ; setc %0"
 		     : "=bcdm" (err), "=a" (errnum)
 		     : "a" (0x7305), "b" (&dio), "c" (-1), "d" (drive),
@@ -204,7 +204,7 @@ void read_device(int drive, const void *buf, size_t nsecs, unsigned int sector)
     dio.bufoffs = (uintptr_t) buf;
     dio.bufseg = data_segment();
 
-    if (dos_version >= 0x0710) {
+    if (dos_version >= 0x070a) {
 	asm volatile("int $0x21 ; setc %0"
 		     : "=bcdm" (err), "=a" (errnum)
 		     : "a" (0x7305), "b" (&dio), "c" (-1), "d" (drive),
@@ -411,7 +411,7 @@ static int do_lock(uint8_t level)
     uint8_t err;
 #if 0
     /* DOS 7.10 = Win95 OSR2 = first version with FAT32 */
-    uint16_t lock_call = (dos_version >= 0x0710) ? 0x484A : 0x084A;
+    uint16_t lock_call = (dos_version >= 0x070a) ? 0x484A : 0x084A;
 #else
     uint16_t lock_call = 0x084A; /* MSDN says this is OK for all filesystems */
 #endif
@@ -486,7 +486,7 @@ void unlock_device(int level)
 
 #if 0
     /* DOS 7.10 = Win95 OSR2 = first version with FAT32 */
-    unlock_call = (dos_version >= 0x0710) ? 0x486A : 0x086A;
+    unlock_call = (dos_version >= 0x070a) ? 0x486A : 0x086A;
 #else
     unlock_call = 0x086A;	/* MSDN says this is OK for all filesystems */
 #endif