diff options
Diffstat (limited to 'sys/arch/i386/boot/start.S')
| -rw-r--r-- | sys/arch/i386/boot/start.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/arch/i386/boot/start.S b/sys/arch/i386/boot/start.S index c70205ed786..288c75326ad 100644 --- a/sys/arch/i386/boot/start.S +++ b/sys/arch/i386/boot/start.S @@ -70,6 +70,7 @@ BOOTABLE = 0x80 # value of boot_ind, means bootable partition ENTRY(boot1) start: +#ifndef DOSREAD # start (aka boot1) is loaded at 0x0:0x7c00 but we want 0x7c0:0 # ljmp to the next instruction to adjust %cs data32 @@ -182,8 +183,13 @@ again: movl $enoboot, %esi data32 jmp err_stop +#else /* !DOSREAD */ + movb $0xff, %dl + jmp _C_LABEL(boot2) +#endif /* DOSREAD */ +#ifndef DOSREAD /* # BIOS call "INT 0x13 Function 0x2" to read sectors from disk into memory # Call with %ah = 0x2 @@ -264,6 +270,7 @@ message: data32 pushl %edx +#endif nextb: cld lodsb # load a byte into %al |