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diff --git a/shakti/m_class.mdwn b/shakti/m_class.mdwn
index 98196abad4cb599f8ef420dfb6f6dfce087362d7..71c65469a971ec55d3ff4eb2ec41bf45a717b6c5 100644 (file)
--- a/shakti/m_class.mdwn
+++ b/shakti/m_class.mdwn
@@ -206,6 +206,7 @@ TBD
 
 Some interfaces at:
 
+* <https://github.com/RoaLogic/apb4_gpio>
 * <https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/>
   includes GPIO, SPI, UART, JTAG, I2C, PinCtrl, UART and PWM.  Also included
   is a Watchdog Timer and others.