diff --git a/.gitignore b/.gitignore
index aeb592ae..4bbc64b9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,4 @@ sdcard.img
 core
 luarpc*
 *.map
+wofs.img
diff --git a/src/newlib/stubs.c b/src/newlib/stubs.c
index 65dfbdb2..334c82ca 100644
--- a/src/newlib/stubs.c
+++ b/src/newlib/stubs.c
@@ -386,6 +386,11 @@ int _kill( int pid, int sig )
 {
   return -1;
 }
+int kill( int pid, int sig )
+{
+  return -1;
+}
+
 #endif
 
 // If LUA_NUMBER_INTEGRAL is defined, "redirect" printf/scanf calls to their 
diff --git a/src/platform/sim/conf.lua b/src/platform/sim/conf.lua
index 16ee6cc5..8077de3c 100644
--- a/src/platform/sim/conf.lua
+++ b/src/platform/sim/conf.lua
@@ -15,6 +15,7 @@ local ldscript = sf( "src/platform/%s/%s", platform, ldscript )
 addcf{ '-ffunction-sections', '-fdata-sections', '-fno-strict-aliasing', '-Wall' }
 addlf{ '-nostartfiles', '-nostdlib', '-T', ldscript, '-Wl,--gc-sections', '-Wl,--allow-multiple-definition' }
 addlib{ 'c','gcc','m' }
+addm({"_READ_WRITE_RETURN_TYPE=_ssize_t"})
 
 local target_flags = { '-march=i386','-mfpmath=387','-m32' }
 
diff --git a/src/platform/sim/cpu_linux.h b/src/platform/sim/cpu_linux.h
index 89d9f4c4..d508366d 100644
--- a/src/platform/sim/cpu_linux.h
+++ b/src/platform/sim/cpu_linux.h
@@ -24,7 +24,12 @@
 // (start address and end address)
 extern void *memory_start_address;
 extern void *memory_end_address;
-#define MEM_LENGTH (1024 * 1024)
+
+// Default to 1M of memory if not specified
+#ifndef SIM_MEM_SIZE
+#define SIM_MEM_SIZE (1024 * 1024)
+#endif
+
 #define INTERNAL_RAM1_FIRST_FREE ( void* )memory_start_address
 #define INTERNAL_RAM1_LAST_FREE  ( void* )memory_end_address
 
diff --git a/src/platform/sim/platform.c b/src/platform/sim/platform.c
index d8e57401..15ecb8ea 100644
--- a/src/platform/sim/platform.c
+++ b/src/platform/sim/platform.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <string.h>
 #include <ctype.h>
+#include <stdio.h>
 #include "term.h"
 
 // Platform specific includes
@@ -91,12 +92,13 @@ void *memory_end_address = 0;
 void platform_ll_init( void )
 {
   // Initialise heap memory region.
-  memory_start_address = hostif_getmem( MEM_LENGTH ); 
-  memory_end_address = memory_start_address + MEM_LENGTH;
+  memory_start_address = hostif_getmem( SIM_MEM_SIZE );
+  memory_end_address = memory_start_address + SIM_MEM_SIZE;
 }
 
 int platform_init()
-{ 
+{
+  char memdata[80];
   if( memory_start_address == NULL ) 
   {
     hostif_putstr( "platform_init(): mmap failed\n" );
@@ -115,7 +117,10 @@ int platform_init()
 
   term_clrscr();
   term_gotoxy( 1, 1 );
- 
+  // Show memory information
+  snprintf( memdata, 80, "RAM size is %u bytes (%uKB)\r\n", (unsigned)SIM_MEM_SIZE, (unsigned)SIM_MEM_SIZE / 1024 );
+  hostif_putstr( memdata );
+
   // All done
   return PLATFORM_OK;
 }
diff --git a/src/romfs.c b/src/romfs.c
index 398b7434..a3f65bf6 100644
--- a/src/romfs.c
+++ b/src/romfs.c
@@ -24,7 +24,7 @@ static FD fd_table[ TOTAL_MAX_FDS ];
 static int romfs_num_fd;
 #ifdef ELUA_CPU_LINUX
 static int wofs_sim_fd;
-#define WOFS_FNAME    "/tmp/wofs.dat"
+#define WOFS_FNAME    "wofs.img"
 #define WOFS_SIZE     (256 * 1024)
 #endif