diff --git a/hw/display/ati_dbg.c b/hw/display/ati_dbg.c
index cbc52025d0..7e59c41ac2 100644
--- a/hw/display/ati_dbg.c
+++ b/hw/display/ati_dbg.c
@@ -23,6 +23,10 @@ static struct ati_regdesc ati_reg_names[] = {
     {"GPIO_DVI_DDC", 0x0064},
     {"GPIO_MONID", 0x0068},
     {"I2C_CNTL_1", 0x0094},
+    {"AMCGPIO_MASK_MIR", 0x009c},
+    {"AMCGPIO_A_MIR", 0x00a0},
+    {"AMCGPIO_Y_MIR", 0x00a4},
+    {"AMCGPIO_EN_MIR", 0x00a8},
     {"PALETTE_INDEX", 0x00b0},
     {"PALETTE_DATA", 0x00b4},
     {"CNFG_CNTL", 0x00e0},
diff --git a/hw/display/ati_regs.h b/hw/display/ati_regs.h
index 81fb5302c0..91947ab1e7 100644
--- a/hw/display/ati_regs.h
+++ b/hw/display/ati_regs.h
@@ -41,6 +41,10 @@
 #define GPIO_DVI_DDC                            0x0064
 #define GPIO_MONID                              0x0068
 #define I2C_CNTL_1                              0x0094
+#define AMCGPIO_MASK_MIR                        0x009c
+#define AMCGPIO_A_MIR                           0x00a0
+#define AMCGPIO_Y_MIR                           0x00a4
+#define AMCGPIO_EN_MIR                          0x00a8
 #define PALETTE_INDEX                           0x00b0
 #define PALETTE_DATA                            0x00b4
 #define CNFG_CNTL                               0x00e0