diff --git a/changelog.txt b/changelog.txt
index b50aff90..4bc85283 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -42,6 +42,8 @@ CHANGE:		Upgrade GFILE FATFS support from V0.10b to V0.13
 FEATURE:	Added UC1610 driver
 FIX:		Fixed to allow gwinSetText with static text on a TextEdit control
 FIX:		Fixed to ChibiOS realloc on a TextEdit control
+FEATURE:	Added support for CMSIS V2.0 operating systems (eg RTX5)
+REMOVED:	Removed long deprecated functions gfxSemCounter() and gfxSemCounterI()
 
 
 *** Release 2.7 ***
diff --git a/gfxconf.example.h b/gfxconf.example.h
index b278ed70..e32dd19f 100644
--- a/gfxconf.example.h
+++ b/gfxconf.example.h
@@ -36,7 +36,9 @@
 //#define GFX_USE_OS_RAWRTOS                           FALSE
 //#define GFX_USE_OS_ARDUINO                           FALSE
 //#define GFX_USE_OS_KEIL                              FALSE
+//#define GFX_USE_OS_RTX5                              FALSE
 //#define GFX_USE_OS_CMSIS                             FALSE
+//#define GFX_USE_OS_CMSIS2                            FALSE
 //#define GFX_USE_OS_RAW32                             FALSE
 //#define GFX_USE_OS_NIOS                              FALSE
 //#define GFX_USE_OS_QT                                FALSE
diff --git a/src/gos/gos.h b/src/gos/gos.h
index 2db896af..dedfcdda 100644
--- a/src/gos/gos.h
+++ b/src/gos/gos.h
@@ -476,8 +476,12 @@
 	#include "gos_arduino.h"
 #elif GFX_USE_OS_CMSIS
  	#include "gos_cmsis.h"
+#elif GFX_USE_OS_CMSIS2
+ 	#include "gos_cmsis2.h"
 #elif GFX_USE_OS_KEIL
     #include "gos_keil.h"
+#elif GFX_USE_OS_RTX5
+    #include "gos_rtx5.h"
 #elif GFX_USE_OS_NIOS
     #include "gos_nios.h"
 #elif GFX_USE_OS_QT
diff --git a/src/gos/gos_options.h b/src/gos/gos_options.h
index e8ce12e7..1c6dc8b1 100644
--- a/src/gos/gos_options.h
+++ b/src/gos/gos_options.h
@@ -91,12 +91,26 @@
 		#define GFX_USE_OS_CMSIS		FALSE
 	#endif
 	/**
-	 * @brief   Use Keil CMSIS
+	 * @brief	Use CMSIS2 RTOS compatible OS
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_CMSIS2
+		#define GFX_USE_OS_CMSIS2		FALSE
+	#endif
+	/**
+	 * @brief   Use Keil CMSIS 1.x (RTOS, RTX4)
 	 * @details	Defaults to FALSE
 	 */
 	#ifndef GFX_USE_OS_KEIL
 		#define GFX_USE_OS_KEIL			FALSE
 	#endif
+	/**
+	 * @brief   Use Keil RTX5
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFX_USE_OS_RTX5
+		#define GFX_USE_OS_RTX5			FALSE
+	#endif
 	/**
 	 * @brief   Use NIOS-II
 	 * @details	Defaults to FALSE
diff --git a/src/gos/gos_rules.h b/src/gos/gos_rules.h
index 6779045d..08de1f3f 100644
--- a/src/gos/gos_rules.h
+++ b/src/gos/gos_rules.h
@@ -16,11 +16,11 @@
 #ifndef _GOS_RULES_H
 #define _GOS_RULES_H
 
-#if !GFX_USE_OS_CHIBIOS && !GFX_USE_OS_WIN32 && !GFX_USE_OS_LINUX && !GFX_USE_OS_OSX && !GFX_USE_OS_RAW32 && !GFX_USE_OS_FREERTOS && !GFX_USE_OS_ECOS && !GFX_USE_OS_RAWRTOS && !GFX_USE_OS_ARDUINO && !GFX_USE_OS_CMSIS && !GFX_USE_OS_KEIL && !GFX_USE_OS_NIOS && !GFX_USE_OS_QT
+#if !GFX_USE_OS_CHIBIOS && !GFX_USE_OS_WIN32 && !GFX_USE_OS_LINUX && !GFX_USE_OS_OSX && !GFX_USE_OS_RAW32 && !GFX_USE_OS_FREERTOS && !GFX_USE_OS_ECOS && !GFX_USE_OS_RAWRTOS && !GFX_USE_OS_ARDUINO && !GFX_USE_OS_CMSIS && !GFX_USE_OS_CMSIS2 && !GFX_USE_OS_KEIL && !GFX_USE_OS_RTX5 && !GFX_USE_OS_NIOS && !GFX_USE_OS_QT
 	#error "GOS: No operating system has been defined."
 #endif
 
-#if GFX_USE_OS_CHIBIOS + GFX_USE_OS_WIN32 + GFX_USE_OS_LINUX + GFX_USE_OS_OSX + GFX_USE_OS_RAW32 + GFX_USE_OS_FREERTOS + GFX_USE_OS_ECOS + GFX_USE_OS_RAWRTOS + GFX_USE_OS_ARDUINO + GFX_USE_OS_CMSIS + GFX_USE_OS_KEIL + GFX_USE_OS_NIOS + GFX_USE_OS_QT != 1 * TRUE
+#if GFX_USE_OS_CHIBIOS + GFX_USE_OS_WIN32 + GFX_USE_OS_LINUX + GFX_USE_OS_OSX + GFX_USE_OS_RAW32 + GFX_USE_OS_FREERTOS + GFX_USE_OS_ECOS + GFX_USE_OS_RAWRTOS + GFX_USE_OS_ARDUINO + GFX_USE_OS_CMSIS + GFX_USE_OS_CMSIS2 + GFX_USE_OS_KEIL + GFX_USE_OS_RTX5 + GFX_USE_OS_NIOS + GFX_USE_OS_QT != 1 * TRUE
 	#error "GOS: More than one operation system has been defined as TRUE."
 #endif
 
@@ -30,7 +30,7 @@
 
 #if GFX_EMULATE_MALLOC
 	#if GFX_USE_OS_WIN32 || GFX_USE_OS_LINUX || GFX_USE_OS_OSX || GFX_USE_OS_ECOS || \
-			(GFX_OS_HEAP_SIZE == 0 && (GFX_USE_OS_RAW32 || GFX_USE_OS_ARDUINO || GFX_USE_OS_CMSIS || GFX_USE_OS_KEIL))
+			(GFX_OS_HEAP_SIZE == 0 && (GFX_USE_OS_RAW32 || GFX_USE_OS_ARDUINO || GFX_USE_OS_CMSIS || GFX_USE_OS_CMSIS2 || GFX_USE_OS_KEIL || GFX_USE_OS_RTX5))
 		#if GFX_DISPLAY_RULE_WARNINGS
 			#if GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_DIRECT
 				#warning "GOS: Cannot emulate malloc as gfxAlloc() internally uses malloc on this platform"