no need to use LARGE translation (40b6ecc6) · Commits · SUMMER2020 / students / proj-2021291

hw/pc.c

+7 −7

Original line number	Diff line number	Diff line
		@@ -215,25 +215,25 @@ static void cmos_init(int ram_size, int boot_device, BlockDriverState **hd_table
		cmos_init_hd(0x1a, 0x24, hd_table[1]);

		val = 0;
		for (i = 0; i < 4; i++)
		for (i = 0; i < 4; i++) {
		if (hd_table[i]) {
		int cylinders, heads, sectors;
		uint8_t translation;

		/* NOTE: bdrv_get_geometry_hint() returns the geometry
		that the hard disk returns. It is always such that: 1 <=
		sects <= 63, 1 <= heads <= 16, 1 <= cylinders <=
		16383. The BIOS geometry can be different. */
		bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, &sectors);
		if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
		/* No translation. */
		translation = 0;
		} else if (cylinders * heads > 131072) {
		} else {
		/* LBA translation. */
		translation = 1;
		} else {
		/* LARGE translation. */
		translation = 2;
		}

		val \|= translation << (i * 2);
		}
		}
		rtc_set_memory(s, 0x39, val);

		/* Disable check of 0x55AA signature on the last two bytes of