#define TP_TOGGLE_MB 0x23 /* Disable/Enable Middle Button */
#define TP_MASK_MB 0x01
-#define TP_TOGGLE_EXT_DEV 0x23 /* Toggle external device */
+#define TP_TOGGLE_EXT_DEV 0x23 /* Disable external device */
#define TP_MASK_EXT_DEV 0x02
#define TP_TOGGLE_DRIFT 0x23 /* Drift Correction */
#define TP_MASK_DRIFT 0x80
#define TP_DEF_MB 0x00
#define TP_DEF_PTSON 0x00
#define TP_DEF_SKIPBACK 0x00
-#define TP_DEF_EXT_DEV 0x01
+#define TP_DEF_EXT_DEV 0x00 /* 0 means enabled */
#define MAKE_PS2_CMD(params, results, cmd) ((params<<12) | (results<<8) | (cmd))