diff --git a/xml/explorer/node_chiplet_ocmb_fir.xml b/xml/explorer/node_chiplet_ocmb_fir.xml
new file mode 100644
index 0000000..d195c84
--- /dev/null
+++ b/xml/explorer/node_chiplet_ocmb_fir.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<attn_node name="CHIPLET_OCMB_FIR" model_ec="EXPLORER_10" reg_type="SCOM">
+
+    <register name="CHIPLET_OCMB_CS_FIR">
+        <instance reg_inst="0" addr="0x08040000" />
+    </register>
+
+    <register name="CHIPLET_OCMB_RE_FIR">
+        <instance reg_inst="0" addr="0x08040001" />
+    </register>
+
+    <register name="CHIPLET_OCMB_FIR_MASK">
+        <instance reg_inst="0" addr="0x08040002" />
+    </register>
+
+    <rule attn_type="UCS" node_inst="0">
+        <!-- FIR & ~MASK & 0x1fffffffffffffff -->
+        <expr type="and">
+            <expr type="reg" value1="CHIPLET_OCMB_CS_FIR" />
+            <expr type="not">
+                <expr type="reg" value1="CHIPLET_OCMB_FIR_MASK" />
+            </expr>
+            <expr type="int" value1="0x1fffffffffffffff" />
+        </expr>
+    </rule>
+
+    <rule attn_type="RE" node_inst="0">
+        <!-- (FIR >> 2) & ~MASK & 0x1fffffffffffffff -->
+        <expr type="and">
+            <expr type="rshift" value1="2">
+                <expr type="reg" value1="CHIPLET_OCMB_RE_FIR" />
+            </expr>
+            <expr type="not">
+                <expr type="reg" value1="CHIPLET_OCMB_FIR_MASK" />
+            </expr>
+            <expr type="int" value1="0x1fffffffffffffff" />
+        </expr>
+    </rule>
+
+    <bit pos= "3" child_node="OCMB_LFIR">Attention from OCMB_LFIR</bit>
+    <bit pos= "4" child_node="MMIOFIR"  >Attention from MMIOFIR</bit>
+    <bit pos= "7" child_node="SRQFIR"   >Attention from SRQFIR</bit>
+    <bit pos= "8" child_node="MCBISTFIR">Attention from MCBISTFIR</bit>
+    <bit pos= "9" child_node="RDFFIR"   >Attention from RDFFIR</bit>
+    <bit pos="11" child_node="TLXFIR"   >Attention from TLXFIR</bit>
+    <bit pos="12" child_node="OMIDLFIR" >Attention from OMIDLFIR</bit>
+
+</attn_node>