+/* Programmable Attribute Map (PAM) Registers */
+#define I440FX_PAM 0x59
+#define Q35_PAM 0x90
+#define PAM_NUM 7
+#define PAM_RW 0x33
+
+/* X-Bus Chip Select Register */
+#define XBCS 0x4e
+#define APIC_EN (1 << 8)
+
+/* IDE Timing Register */
+#define IDE0_TIM 0x40
+#define IDE1_TIM 0x42
+#define IDE_DECODE_EN (1 << 15)
+