diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -9,18 +9,39 @@ gamepads.
 
 ### Selected pinout
 
-| PSX signal | rp2040 GPIO | Direction | Description |
-| ---------- | ----------- | --------- | ----------- |
-| DATA       | 13 | IN | Receive ID, buttons and adc data from controller |
-| CMD        | 12 | OUT | Send read commands to controller |
-| Attention  | 6 | OUT | Chip select (active low) for controller |
-| Clock      | 5 | OUT | Clock serial communication for DATA/CMD lines |
-| ACK        | 3 | IN  | Acknowledge command RX, active low |
+The PSX connector controller port has the following pinout:
+
+  1. Data
+  2. Command
+  3. 7.5V Rumble motor
+  4. GND (also connected to the shield)
+  5. 3.3V
+  6. Attention
+  7. Clock
+  8. Not connected
+  9. Acknowledge
+
+![PSX controller pinout](./jpg/controller-pinout.jpg) [Image from consoledev.net]
+
+
+
+| PSX signal  | rp2040 GPIO | Direction | Description |
+| ----------- | ----------- | --------- | ----------- |
+| Data        | 13 | IN | Receive ID, buttons and adc data from controller |
+| Command     | 12 | OUT | Send read commands to controller |
+| Attention   | 6 | OUT | Chip select (active low) for controller |
+| Clock       | 5 | OUT | Clock serial communication for DATA/CMD lines |
+| Acknowledge | 3 | IN  | Acknowledge command RX, active low |
+
+
+
+
 
 
 
 ### Installation
 
-Run cmake && make. Start rp2040 in usb storage mode. Copy psx2usb.u2f to the device. Reboot.
-
+ * Run cmake && make
+ * Start rp2040 in usb storage mode. Copy psx2usb.u2f to the device.
+ * Reboot rp2040
 
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