| /SPARTAN/trunk/arch/ia32/src/boot/boot.S |
|---|
| 52,6 → 52,7 |
| cli |
| xorw %ax, %ax |
| movw %ax, %ds |
| movw %ax, %es |
| movw %ax, %ss # initialize stack segment register |
| movl $BOOTSTRAP_OFFSET - 0x400, %esp # initialize stack pointer |
| 85,7 → 86,7 |
| movw %ax, %ds # kernel data + stack |
| movw %ax, %ss |
| movb $0xd1, %al # enable A20 using the keyboard controller |
| movb $0xd1, %al # enable A20 using i8042 controller |
| outb %al, $0x64 |
| movb $0xdf, %al |
| outb %al, $0x60 |