diff --git a/README.txt b/README.txt
index 185432f..53b7034 100644
--- a/README.txt
+++ b/README.txt
@@ -13,4 +13,5 @@ MEC1501 component style is located at:
 
 https://github.com/MicrochipTech/hal_microchip
 
-Version: 1.2.0
+Version: 1.2.1
+Add missing eSPI Virtual Wires groups 8 - 10 GIRQ definitions.
diff --git a/mec/mec1501/component/espi_vw.h b/mec/mec1501/component/espi_vw.h
index ca7cad2..5f41043 100644
--- a/mec/mec1501/component/espi_vw.h
+++ b/mec/mec1501/component/espi_vw.h
@@ -165,7 +165,11 @@
 
 /*
  * ESPI MSVW interrupts
+ * GIRQ24 contains MSVW 0 - 6
+ * GIRQ25 contains MSVW 7 - 10
  */
+#define MEC_ESPI_MSVW_NUM_GIRQS     2u
+
 #define MEC_ESPI_MSVW_00_06_GIRQ    24u
 #define MEC_ESPI_MSVW_00_06_NVIC    15u
 
@@ -253,11 +257,29 @@
 #define MEC_ESPI_MSVW10_SRC2_POS    14u
 #define MEC_ESPI_MSVW10_SRC3_POS    15u
 
+#define MEC_ESPI_MSVW07_SRC0_VAL    (1U << MEC_ESPI_MSVW07_SRC0_POS)
+#define MEC_ESPI_MSVW07_SRC1_VAL    (1U << MEC_ESPI_MSVW07_SRC1_POS)
+#define MEC_ESPI_MSVW07_SRC2_VAL    (1U << MEC_ESPI_MSVW07_SRC2_POS)
+#define MEC_ESPI_MSVW07_SRC3_VAL    (1U << MEC_ESPI_MSVW07_SRC3_POS)
+#define MEC_ESPI_MSVW08_SRC0_VAL    (1U << MEC_ESPI_MSVW08_SRC0_POS)
+#define MEC_ESPI_MSVW08_SRC1_VAL    (1U << MEC_ESPI_MSVW08_SRC1_POS)
+#define MEC_ESPI_MSVW08_SRC2_VAL    (1U << MEC_ESPI_MSVW08_SRC2_POS)
+#define MEC_ESPI_MSVW08_SRC3_VAL    (1U << MEC_ESPI_MSVW08_SRC3_POS)
+#define MEC_ESPI_MSVW09_SRC0_VAL    (1U << MEC_ESPI_MSVW09_SRC0_POS)
+#define MEC_ESPI_MSVW09_SRC1_VAL    (1U << MEC_ESPI_MSVW09_SRC1_POS)
+#define MEC_ESPI_MSVW09_SRC2_VAL    (1U << MEC_ESPI_MSVW09_SRC2_POS)
+#define MEC_ESPI_MSVW09_SRC3_VAL    (1U << MEC_ESPI_MSVW09_SRC3_POS)
+#define MEC_ESPI_MSVW10_SRC0_VAL    (1U << MEC_ESPI_MSVW10_SRC0_POS)
+#define MEC_ESPI_MSVW10_SRC1_VAL    (1U << MEC_ESPI_MSVW10_SRC1_POS)
+#define MEC_ESPI_MSVW10_SRC2_VAL    (1U << MEC_ESPI_MSVW10_SRC2_POS)
+#define MEC_ESPI_MSVW10_SRC3_VAL    (1U << MEC_ESPI_MSVW10_SRC3_POS)
+
 /*
  * 7 <= v <= 10
  * 0 <= s <= 3
  */
-#define MEC_ESPI_MSVW_07_10_GIRQ_POS(v, s) ((((uint32_t)(v) - 7ul) << 2) + (uint32_t)(s))
+#define MEC_ESPI_MSVW_07_10_GIRQ_POS(v, s) \
+		((((uint32_t)(v) - 7ul) << 2) + (uint32_t)(s))
 
 /* Master-to-Slave VW byte indices(offsets) */
 #define MSVW_INDEX_OFS      0u