pokew.c

一个类linux的dos下开发的操作系统.

__inline__ void pokew(unsigned short sel, unsigned long off, unsigned short val)
{
	__asm__ __volatile__("mov %0,%%es\n"
		"es\n"
		"movw %w1,(%2)"
		:
/* xxx - 2nd "r" means any reg, but you want one of the regs than can be
used in an address without a prefix: EBP, EBX, ESI, EDI */
		: "m"(sel), "r"(val), "r"(off));
}