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| author | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 16:11:36 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 16:11:36 -0700 |
| commit | 13550911fc71d953d1ca15785f7f7628f7cc69cb (patch) | |
| tree | 1c7a8775ef1bbd1f12c79cd160c0de6c803483ef /mbr/mbr.S | |
| parent | 65fface6fa2e0791859ea397774fdcfe86663de8 (diff) | |
| download | syslinux-13550911fc71d953d1ca15785f7f7628f7cc69cb.tar.gz | |
Another 3 bytes or so off the MBR...
Diffstat (limited to 'mbr/mbr.S')
| -rw-r--r-- | mbr/mbr.S | 12 |
1 files changed, 7 insertions, 5 deletions
@@ -176,6 +176,8 @@ scan_partition_table: movw $ptab, %di movw $4, %cx xorw %ax, %ax + push %di + push %cx 5: testb $0x80, (%di) jz 6f @@ -185,13 +187,13 @@ scan_partition_table: addw $16, %di loopw 5b - cmpw $1, %ax /* Number of active partitions found */ - je boot - ja too_many_active + decw %ax /* Number of active partitions found */ + jz boot + jns too_many_active /* No active partitions found, look for extended partitions */ - movw $ptab, %di - movb $4, %cl /* cx == 0 here */ + popw %di /* %di <- ptab */ + popw %cx /* %cx <- 4 */ 7: movb 4(%di), %al cmpb $0x0f, %al /* 0x0f = Win9x extended */ |