+#define BD_SERIAL1 0x14,0x02
+#define BD_ICMB 0x14,0x04
+#define BD_LAN 0x14,0x08
+#define BD_SERIAL2 0x14,0x10
+#define BD_SERIAL3 0x14,0x20
+#define BD_USB 0x14,0x40
+#define BD_PCI 0x15,0x03
+#define BD_LPC 0x15,0x04
+#define BD_VGA 0x15,0x08
+#define BD_BATTERY 0x15,0x10
+#define BD_ACDC 0x15,0x20
+#define BD_STANDBY 0x15,0x40
+#define BD_POWERCONN 0x15,0x70
+#define BD_DVI 0x15,0x80
+#define BD_PWRATX 0x16,0x01
+#define BD_PWRRELAY 0x16,0x02
+#define BD_PS2A 0x19,0xff
+
+#define MAGIC(fn, args...) fn(args)
+
+#define _BD_IS_SET(bd, byte, bits) (bd[byte] & bits)
+#define BD_IS_SET(bd, ident) MAGIC(_BD_IS_SET, bd, BD_##ident)
+#define BD_TEXT(bd, ident) (BD_IS_SET(bd, ident) ? "TRUE" : "FALSE")
+
+#define _BD_SET(bd, byte, bits) (bd[byte] |= bits)
+#define BD_SET(bd, ident) MAGIC(_BD_SET, bd, BD_##ident)
+