diff --git a/PORTS.md b/PORTS.md
new file mode 100644
index 0000000..a8e5142
--- /dev/null
+++ b/PORTS.md
@@ -0,0 +1,26 @@
+# Micro PA50 controller
+
+## Ports
+```
+ /*
+  * D0  - PD0 RX
+  * D1  - PD1 TX
+  * D2  - PD2 IN  PTT IN
+  * D3  - PD3 IN  KEY
+  * D4  - PD4 OUT RELAY5 TX SWITCH
+  * D5  - PD5 IN  FREQ OSC MC74HC4060A
+  * D6  - PD6 OUT 10M
+  * D7  - PD7 OUT 20M
+  * D8  - PB0 OUT 40M
+  * D9  - PB1 OUT 80M
+  * D10 - PB2 OUT BUZZER
+  * D11 - PB3 IN  TEMP DS18B20
+  * D12 - PB4 OUT FAN
+  * D13 - PB5 OUT PA ATT SWITCH
+  *
+  * A0 PC0 - V.REV
+  * A1 PC1 - V.FWD
+  * A2 PC2 - ICOM
+  * A3 PC3 - V.VCC
+  */
+```
diff --git a/README.md b/README.md
index a8e5142..20e87d8 100644
--- a/README.md
+++ b/README.md
@@ -1,26 +1,2 @@
 # Micro PA50 controller
 
-## Ports
-```
- /*
-  * D0  - PD0 RX
-  * D1  - PD1 TX
-  * D2  - PD2 IN  PTT IN
-  * D3  - PD3 IN  KEY
-  * D4  - PD4 OUT RELAY5 TX SWITCH
-  * D5  - PD5 IN  FREQ OSC MC74HC4060A
-  * D6  - PD6 OUT 10M
-  * D7  - PD7 OUT 20M
-  * D8  - PB0 OUT 40M
-  * D9  - PB1 OUT 80M
-  * D10 - PB2 OUT BUZZER
-  * D11 - PB3 IN  TEMP DS18B20
-  * D12 - PB4 OUT FAN
-  * D13 - PB5 OUT PA ATT SWITCH
-  *
-  * A0 PC0 - V.REV
-  * A1 PC1 - V.FWD
-  * A2 PC2 - ICOM
-  * A3 PC3 - V.VCC
-  */
-```