diff options
Diffstat (limited to 'dos/syslinux.c')
| -rw-r--r-- | dos/syslinux.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/dos/syslinux.c b/dos/syslinux.c index eb8bace6..63a3a854 100644 --- a/dos/syslinux.c +++ b/dos/syslinux.c @@ -41,7 +41,7 @@ uint16_t dos_version; void pause(void) { uint16_t ax; - + asm volatile("int $0x16" : "=a" (ax) : "a" (0)); } #else @@ -187,7 +187,7 @@ void write_device(int drive, const void *buf, size_t nsecs, unsigned int sector) dio.sectors = nsecs; dio.bufoffs = (uintptr_t) buf; dio.bufseg = data_segment(); - + if (dos_version >= 0x070a) { /* Try FAT32-aware system call first */ asm volatile("int $0x21 ; jc 1f ; xorw %0,%0\n" @@ -220,7 +220,7 @@ void read_device(int drive, void *buf, size_t nsecs, unsigned int sector) dio.sectors = nsecs; dio.bufoffs = (uintptr_t) buf; dio.bufseg = data_segment(); - + if (dos_version >= 0x070a) { /* Try FAT32-aware system call first */ asm volatile("int $0x21 ; jc 1f ; xorw %0,%0\n" @@ -402,14 +402,6 @@ int libfat_xpread(intptr_t pp, void *buf, size_t secsize, static inline void get_dos_version(void) { - uint16_t ver; - - asm("int $0x21 ; xchgb %%ah,%%al" - : "=a" (ver) - : "a" (0x3001) - : "ebx", "ecx"); - dos_version = ver; - dprintf("DOS version %d.%d\n", (dos_version >> 8), dos_version & 0xff); } @@ -475,7 +467,7 @@ soft_fail: if (hard_lock) { /* Hard locking, only level 4 supported */ /* This is needed for Win9x in DOS mode */ - + err = do_lock(4); if (err) { if (err == 0x0001) { |