dos_read(unsigned char huge *buf, unsigned long len)
{
	union REGS regs;
	struct SREGS segregs;
	unsigned int bytes_to_read;

	segregs.ds = FP_SEG(buf);

	while(1)
	{
		regs.h.ah = 0x3f ;
		regs.x.bx = midf;
		regs.x.dx = 0;

		if(len >= 0x8000)
			bytes_to_read = 0x8000;
		else
			bytes_to_read = (unsigned int)len;

		regs.x.cx = bytes_to_read;
		intdosx(&regs, &regs, &segregs);
		if(bytes_to_read < 0x8000) break;
		len -= 0x8000L;
		if(len == 0L) break;
		segregs.ds += 0x0800;
	}
}
.