diff --git a/ptb4.json b/ptb4.json
new file mode 100644
index 0000000..c608ca8
--- /dev/null
+++ b/ptb4.json
@@ -0,0 +1,32 @@
+{
+    "target": "kasli",
+    "variant": "ptb4",
+    "hw_rev": "v1.1",
+    "base": "standalone",
+    "core_addr": "10.0.16.140",
+    "peripherals": [
+        {
+            "type": "dio",
+            "ports": [0],
+            "bank_direction_low": "input",
+            "bank_direction_high": "output"
+        },
+        {
+            "type": "dio",
+            "ports": [1],
+            "bank_direction_low": "output",
+            "bank_direction_high": "output"
+        },
+        {
+            "type": "urukul",
+            "ports": [2, 3],
+            "dds": "ad9912",
+            "clk_sel": 2
+        },
+        {
+            "type": "urukul",
+            "ports": [4, 5],
+            "clk_sel": 2
+        }
+   ]
+}