diff options
| author | ment <thement@ibawizard.net> | 2011-04-27 23:19:30 +0200 |
|---|---|---|
| committer | ment <thement@ibawizard.net> | 2011-04-27 23:19:30 +0200 |
| commit | 1cd8b4c9b41689f9a74d24bbf5e582b1f1f1a6ce (patch) | |
| tree | 2733ce383f4a0539228a7d6c1377a3ed5964ef4f /sys | |
| parent | d1a1034cbe1492a5b4cfdac5c3190dd5d069bc4f (diff) | |
shifted PBS loader to not overlap with FAT32 header
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/src/boot/pc/pbs.s | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/sys/src/boot/pc/pbs.s b/sys/src/boot/pc/pbs.s index a4c1fc191..6b11eded9 100644 --- a/sys/src/boot/pc/pbs.s +++ b/sys/src/boot/pc/pbs.s @@ -4,7 +4,7 @@ #define RELOC 0x7c00 TEXT _magic(SB), $0 - BYTE $0xEB; BYTE $0x3C; /* jmp .+ 0x3C (_start0x3E) */ + BYTE $0xEB; BYTE $0x58; /* jmp .+ 0x58 (_start0x5A) */ BYTE $0x90 /* nop */ TEXT _version(SB), $0 BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00; @@ -35,9 +35,26 @@ TEXT _nhiddenhi(SB), $0 BYTE $0x00; BYTE $0x00; TEXT _bigvolsize(SB), $0 BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00; +/* FAT32 structure, starting @0x24 */ +TEXT _fatsz32(SB), $0 + BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00 +TEXT _extflags(SB), $0 + BYTE $0x00; BYTE $0x00 +TEXT _fsver(SB), $0 + BYTE $0x00; BYTE $0x00 +TEXT _rootclust(SB), $0 + BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00 +TEXT _fsinfo(SB), $0 + BYTE $0x00; BYTE $0x00 +TEXT _bkboot(SB), $0 + BYTE $0x00; BYTE $0x00 +TEXT _reserved0(SB), $0 + BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00; + BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00; + BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00 TEXT _driveno(SB), $0 BYTE $0x00 -TEXT _reserved0(SB), $0 +TEXT _reserved1(SB), $0 BYTE $0x00 TEXT _bootsig(SB), $0 BYTE $0x00 @@ -49,9 +66,9 @@ TEXT _label(SB), $0 BYTE $0x00; BYTE $0x00; BYTE $0x00 TEXT _type(SB), $0 BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00; - BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00; + BYTE $0x00; BYTE $0x00; BYTE $0x00; BYTE $0x00 -_start0x3E: +_start0x5A: CLI CLR(rAX) MTSR(rAX, rSS) /* 0000 -> rSS */ |