diff --git a/configs/nucleus2g/include/board.h b/configs/nucleus2g/include/board.h
index 74965c7783..b10b7c4bd0 100755
--- a/configs/nucleus2g/include/board.h
+++ b/configs/nucleus2g/include/board.h
@@ -64,6 +64,23 @@
 #define LED_ASSERTION              6
 #define LED_PANIC                  7
 
+/* Alternate pin selections *********************************************************/
+
+#define GPIO_UART1_TXD             GPIO_UART1_TXD_1
+#define GPIO_UART1_RXD             GPIO_UART1_RXD_1
+#define GPIO_UART1_CTS             GPIO_UART1_CTS_1
+#define GPIO_UART1_DCD             GPIO_UART1_DCD_1
+#define GPIO_UART1_DSR             GPIO_UART1_DSR_1
+#define GPIO_UART1_DTR             GPIO_UART1_DTR_1
+#define GPIO_UART1_RI              GPIO_UART1_RI_1
+#define GPIO_UART1_RTS             GPIO_UART1_RTS_1
+
+#define GPIO_UART2_TXD             GPIO_UART2_TXD_1
+#define GPIO_UART2_RXD             GPIO_UART2_RXD_1
+
+#define GPIO_UART3_TXD             GPIO_UART3_TXD_1
+#define GPIO_UART3_RXD             GPIO_UART3_RXD_1
+
 /************************************************************************************
  * Public Data
  ************************************************************************************/
diff --git a/configs/nucleus2g/ostest/defconfig b/configs/nucleus2g/ostest/defconfig
index 0e1b80f22e..0ad74e5f1d 100755
--- a/configs/nucleus2g/ostest/defconfig
+++ b/configs/nucleus2g/ostest/defconfig
@@ -77,7 +77,7 @@ CONFIG_ARCH_CHIP_LPC1768=y
 CONFIG_ARCH_BOARD=nucleus2g
 CONFIG_ARCH_BOARD_NUCLEUS2G=y
 CONFIG_BOARD_LOOPSPERMSEC=5483
-CONFIG_DRAM_SIZE=0x00008000
+CONFIG_DRAM_SIZE=(32*1024)
 CONFIG_DRAM_START=0x10000000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
 CONFIG_ARCH_IRQPRIO=y