diff options
Diffstat (limited to 'bootblocks/msdos.s')
| -rw-r--r-- | bootblocks/msdos.s | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/bootblocks/msdos.s b/bootblocks/msdos.s index b9f02a9..4e9eb1a 100644 --- a/bootblocks/msdos.s +++ b/bootblocks/msdos.s @@ -356,8 +356,6 @@ maincode: mov bx,#LOADSEG mov ds,bx ! DS = loadaddress - inc bx - inc bx ! bx = initial CS xor di,di ! Zero mov ax,[di] cmp ax,#0x0301 ! Right magic ? @@ -370,19 +368,19 @@ maincode: shr ax,cl impure: pop cx ! Partition offset. + inc bx + inc bx ! bx = initial CS add ax,bx mov ss,ax mov sp,[di+24] ! Chmem value mov ds,ax + ! AX=ds, BX=cs, CX=X, DX=X, SI=X, DI=0, BP=X, ES=X, DS=*, SS=*, CS=* + +bad_magic: push bx ! jmpi 0,#LOADSEG+2 push di - - ! AX=ds, BX=cs, CX=X, DX=X, SI=X, DI=0, BP=X, ES=X, DS=*, SS=*, CS=* retf -bad_magic: - pop cx - jmpi LOADSEG<<4,0 ! No magics, just go. !--------------------------------------------------------------------------- ! initilised data |