diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 17:44:18 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 17:44:18 -0700 |
| commit | 6bfbea466b2304fb8ad4c1d718f9c73635ead1c5 (patch) | |
| tree | f7197de2ad200c70794e5b5adc8b162880c277b9 /mbr | |
| parent | 3d7c434a87c512c64c78df32f1b548cd502b61f3 (diff) | |
| download | syslinux-6bfbea466b2304fb8ad4c1d718f9c73635ead1c5.tar.gz | |
MBR: shave off another byte
Shave off another byte by using the not-frequently-used jmpw *%sp
instruction!
Diffstat (limited to 'mbr')
| -rw-r--r-- | mbr/mbr.S | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -262,12 +262,12 @@ boot: jc disk_error cmpw $0xaa55, (bootsec+510) jne missing_os /* Not a valid boot sector */ - movw $driveno, %sp + movw $driveno, %sp /* driveno == bootsec-6 */ popw %dx /* dl -> drive number */ popw %di /* es:di -> $PnP vector */ popw %es cli - jmp bootsec + jmpw *%sp /* %sp == bootsec */ disk_error: call error |