diff --git a/cMIPS/tests/uart_irx.c b/cMIPS/tests/uart_irx.c
index d783b6ecca398a95433efb09b2291c324ca4321f..9c837c498a0e9b4675846d9932be6e00eb1e13e8 100644
--- a/cMIPS/tests/uart_irx.c
+++ b/cMIPS/tests/uart_irx.c
@@ -1,16 +1,15 @@
 #include "cMIPS.h"
 
 typedef struct control { // control register fields (uses only ls byte)
-  int ign   : 24+3,      // ignore uppermost bits
+  int ign   : 24,        // ignore uppermost bits
+    rts     : 1,         // Request to Send output (bit 7)
+    ign2    : 2,         // bits 6,5 ignored
     intTX   : 1,         // interrupt on TX buffer empty (bit 4)
     intRX   : 1,         // interrupt on RX buffer full (bit 3)
     speed   : 3;         // 4,8,16..256 tx-rx clock data rates  (bits 0..2)
 } Tcontrol;
 
 typedef struct status { // status register fields (uses only ls byte)
-#if 1
-  int s;
-#else
   int ign : 24,       // ignore uppermost bits
   ign7    : 1,        // ignored (bit 7)
   txEmpty : 1,        // TX register is empty (bit 6)
@@ -20,7 +19,6 @@ typedef struct status { // status register fields (uses only ls byte)
   ign2    : 1,        // ignored (bit 2)
   framing : 1,        // framing error (bit 1)
   overun  : 1;        // overun error (bit 0)
-#endif
 } Tstatus;
 
 #define RXfull  0x00000020
@@ -55,6 +53,7 @@ int main(void) { // receive a string through the UART serial interface
   uart = (void *)IO_UART_ADDR; // bottom of UART address range
 
   ctrl.ign   = 0;
+  ctrl.rts   = 0;
   ctrl.intTX = 0;
   ctrl.intRX = 1;
   ctrl.speed = 1;    // operate at 1/2 of the highest data rate
diff --git a/cMIPS/vhdl/packageMemory.vhd b/cMIPS/vhdl/packageMemory.vhd
index f5e0a9fb7ffc2d0ca848f272170908c2f6a15c3b..4a3341ccd280d12b643f785053f1408a65ccf89c 100644
--- a/cMIPS/vhdl/packageMemory.vhd
+++ b/cMIPS/vhdl/packageMemory.vhd
@@ -41,9 +41,9 @@ package p_MEMORY is
   -- begin DO NOT change these names as several scripts depend on them --
   --  you may change the values, not names neither formatting          --
   constant x_INST_BASE_ADDR : reg32   := x"00000000";
-  constant x_INST_MEM_SZ    : reg32   := x"00002000";
+  constant x_INST_MEM_SZ    : reg32   := x"00004000";
   constant x_DATA_BASE_ADDR : reg32   := x"00010000";
-  constant x_DATA_MEM_SZ    : reg32   := x"00002000";
+  constant x_DATA_MEM_SZ    : reg32   := x"00008000";
   constant x_IO_BASE_ADDR   : reg32   := x"0F000000";
   constant x_IO_MEM_SZ      : reg32   := x"00002000";
   constant x_IO_ADDR_RANGE  : reg32   := x"00000020";