diff --git a/src/add-ons/accelerants/radeon_hd/accelerant.cpp b/src/add-ons/accelerants/radeon_hd/accelerant.cpp
index 8c5c81a7f0..fccbf836ab 100644
--- a/src/add-ons/accelerants/radeon_hd/accelerant.cpp
+++ b/src/add-ons/accelerants/radeon_hd/accelerant.cpp
@@ -1,9 +1,10 @@
 /*
- * Copyright 2006-2009, Haiku, Inc. All Rights Reserved.
+ * Copyright 2006-2011, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
  *		Axel Dörfler, axeld@pinc-software.de
+ *		Alexander von Gluck, kallisti5@unixzen.com
  */
 
 
@@ -24,13 +25,14 @@
 #define TRACE_ACCELERANT
 #ifdef TRACE_ACCELERANT
 extern "C" void _sPrintf(const char *format, ...);
-#	define TRACE(x) _sPrintf x
+#	define TRACE(x...) _sPrintf("radeon_hd: " x)
 #else
-#	define TRACE(x) ;
+#	define TRACE(x...) ;
 #endif
 
 
 struct accelerant_info *gInfo;
+struct register_info *gRegister;
 
 
 class AreaCloner {
@@ -92,10 +94,13 @@ init_common(int device, bool isClone)
 	// initialize global accelerant info structure
 
 	gInfo = (accelerant_info *)malloc(sizeof(accelerant_info));
-	if (gInfo == NULL)
+	gRegister = (register_info *)malloc(sizeof(register_info));
+
+	if (gInfo == NULL || gRegister == NULL)
 		return B_NO_MEMORY;
 
 	memset(gInfo, 0, sizeof(accelerant_info));
+	memset(gRegister, 0, sizeof(register_info));
 
 	gInfo->is_clone = isClone;
 	gInfo->device = device;
@@ -118,8 +123,8 @@ init_common(int device, bool isClone)
 	status_t status = sharedCloner.InitCheck();
 	if (status < B_OK) {
 		free(gInfo);
-		TRACE(("radeon_init_accelerant() failed shared area%i, %i\n",
-			data.shared_info_area, gInfo->shared_info_area));
+		TRACE("%s, failed shared area%i, %i\n",
+			__func__, data.shared_info_area, gInfo->shared_info_area);
 		return status;
 	}
 
@@ -154,6 +159,60 @@ uninit_common(void)
 		close(gInfo->device);
 
 	free(gInfo);
+	free(gRegister);
+}
+
+
+/*! Populate gRegister with device dependant register locations */
+static status_t
+init_registers()
+{
+	// gInfo should always be populated before running this
+	if (gInfo == NULL)
+		return B_ERROR;
+
+	uint16_t chipset = gInfo->shared_info->device_chipset;
+
+	if (chipset >= RADEON_R800) {
+		gRegister->regOffsetCRT0 = EVERGREEN_CRTC0_REGISTER_OFFSET;
+		gRegister->regOffsetCRT1 = EVERGREEN_CRTC1_REGISTER_OFFSET;
+		gRegister->grphEnable = EVERGREEN_GRPH_ENABLE;
+		gRegister->grphControl = EVERGREEN_GRPH_CONTROL;
+		gRegister->grphSwapControl = EVERGREEN_GRPH_SWAP_CONTROL;
+		gRegister->grphPrimarySurfaceAddr
+			= EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS;
+		gRegister->grphPitch = EVERGREEN_GRPH_PITCH;
+		gRegister->grphSurfaceOffsetX = EVERGREEN_GRPH_SURFACE_OFFSET_X;
+		gRegister->grphSurfaceOffsetY = EVERGREEN_GRPH_SURFACE_OFFSET_Y;
+		gRegister->grphXStart = EVERGREEN_GRPH_X_START;
+		gRegister->grphYStart = EVERGREEN_GRPH_Y_START;
+		gRegister->grphXEnd = EVERGREEN_GRPH_X_END;
+		gRegister->grphYEnd = EVERGREEN_GRPH_Y_END;
+		gRegister->grphDesktopHeight = EVERGREEN_DESKTOP_HEIGHT;
+	} else if (chipset >= RADEON_R600 && chipset < RADEON_R800) {
+		gRegister->regOffsetCRT0 = D1_REG_OFFSET;
+		gRegister->regOffsetCRT1 = D2_REG_OFFSET;
+		gRegister->grphEnable = D1GRPH_ENABLE;
+		gRegister->grphControl = D1GRPH_CONTROL;
+		gRegister->grphSwapControl = D1GRPH_SWAP_CNTL;
+		gRegister->grphPrimarySurfaceAddr = D1GRPH_PRIMARY_SURFACE_ADDRESS;
+		gRegister->grphPitch = D1GRPH_PITCH;
+		gRegister->grphSurfaceOffsetX = D1GRPH_SURFACE_OFFSET_X;
+		gRegister->grphSurfaceOffsetY = D1GRPH_SURFACE_OFFSET_Y;
+		gRegister->grphXStart = D1GRPH_X_START;
+		gRegister->grphYStart = D1GRPH_Y_START;
+		gRegister->grphXEnd = D1GRPH_X_END;
+		gRegister->grphYEnd = D1GRPH_Y_END;
+		gRegister->grphDesktopHeight = D1MODE_DESKTOP_HEIGHT;
+	} else {
+		// this really shouldn't happen unless a driver PCIID chipset is wrong
+		TRACE("%s, unknown Radeon chipset: r%X\n", __func__, chipset);
+		return B_ERROR;
+	}
+
+	TRACE("%s, registers for ATI chipset r%X initilized\n", __func__, chipset);
+
+	return B_OK;
 }
 
 
@@ -164,12 +223,16 @@ uninit_common(void)
 status_t
 radeon_init_accelerant(int device)
 {
-	TRACE(("radeon_init_accelerant()\n"));
+	TRACE("%s enter\n", __func__);
 
 	status_t status = init_common(device, false);
 	if (status != B_OK)
 		return status;
 
+	status = init_registers();
+	if (status != B_OK)
+		return status;
+
 	radeon_shared_info &info = *gInfo->shared_info;
 
 	init_lock(&info.accelerant_lock, "radeon hd accelerant");
@@ -182,7 +245,7 @@ radeon_init_accelerant(int device)
 		return status;
 	}
 
-	TRACE(("radeon_init_accelerant() done\n"));
+	TRACE("%s done\n", __func__);
 	return B_OK;
 }
 
@@ -193,7 +256,7 @@ radeon_init_accelerant(int device)
 void
 radeon_uninit_accelerant(void)
 {
-	TRACE(("radeon_uninit_accelerant()\n"));
+	TRACE("%s enter\n", __func__);
 
 	gInfo->mode_list = NULL;
 
@@ -203,5 +266,6 @@ radeon_uninit_accelerant(void)
 	uninit_lock(&info.engine_lock);
 
 	uninit_common();
+	TRACE("%s done\n", __func__);
 }
 
diff --git a/src/add-ons/accelerants/radeon_hd/accelerant.h b/src/add-ons/accelerants/radeon_hd/accelerant.h
index 620874e0d7..27a7f2168f 100644
--- a/src/add-ons/accelerants/radeon_hd/accelerant.h
+++ b/src/add-ons/accelerants/radeon_hd/accelerant.h
@@ -36,12 +36,32 @@ struct accelerant_info {
 	display_mode	lvds_panel_mode;
 };
 
+
+struct register_info {
+	uint16_t	regOffsetCRT0;
+	uint16_t	regOffsetCRT1;
+	uint16_t	grphEnable;
+	uint16_t	grphControl;
+	uint16_t	grphSwapControl;
+	uint16_t	grphPrimarySurfaceAddr;
+	uint16_t	grphPitch;
+	uint16_t	grphSurfaceOffsetX;
+	uint16_t	grphSurfaceOffsetY;
+	uint16_t	grphXStart;
+	uint16_t	grphYStart;
+	uint16_t	grphXEnd;
+	uint16_t	grphYEnd;
+	uint16_t	grphDesktopHeight;
+};
+
+
 #define HEAD_MODE_A_ANALOG		0x01
 #define HEAD_MODE_B_DIGITAL		0x02
 #define HEAD_MODE_CLONE			0x03
 #define HEAD_MODE_LVDS_PANEL	0x08
 
 extern accelerant_info *gInfo;
+extern register_info *gRegister;
 
 // register access
 
diff --git a/src/add-ons/accelerants/radeon_hd/mode.cpp b/src/add-ons/accelerants/radeon_hd/mode.cpp
index 968593296e..9c7fcfbf4c 100644
--- a/src/add-ons/accelerants/radeon_hd/mode.cpp
+++ b/src/add-ons/accelerants/radeon_hd/mode.cpp
@@ -152,104 +152,60 @@ CardBlankSet(int crtNumber, bool blank)
 static void
 CardFBSet(int crtNumber, display_mode *mode)
 {
-	uint16_t chipset = gInfo->shared_info->device_chipset;
-
 	uint32 colorMode;
 	uint32 bytesPerRow;
 	uint32 bitsPerPixel;
 
-	// Our registers
-	// (set to 0 to avoid reading/writing random memory if not set)
-	uint16_t regOffset = 0;
-	uint16_t grphEnable = 0;
-	uint16_t grphControl = 0;
-	uint16_t grphSwapControl = 0;
-	uint16_t grphPrimarySurfaceAddr = 0;
-	uint16_t grphPitch = 0;
-	uint16_t grphSurfaceOffsetX = 0;
-	uint16_t grphSurfaceOffsetY = 0;
-	uint16_t grphXStart = 0;
-	uint16_t grphYStart = 0;
-	uint16_t grphXEnd = 0;
-	uint16_t grphYEnd = 0;
-	uint16_t grphDesktopHeight = 0;
+	uint16_t regOffset = (crtNumber == 0)
+		? gRegister->regOffsetCRT0 : gRegister->regOffsetCRT1;
 
 	get_color_space_format(*mode, colorMode, bytesPerRow, bitsPerPixel);
 
-	if (chipset >= RADEON_R800) {
-		// Evergreen registers differ from r600-r700
-		regOffset = (crtNumber == 2)
-			? EVERGREEN_CRTC1_REGISTER_OFFSET : EVERGREEN_CRTC0_REGISTER_OFFSET;
-		grphEnable = EVERGREEN_GRPH_ENABLE;
-		grphControl = EVERGREEN_GRPH_CONTROL;
-		grphSwapControl = EVERGREEN_GRPH_SWAP_CONTROL;
-		grphPrimarySurfaceAddr = EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS;
-		grphPitch = EVERGREEN_GRPH_PITCH;
-		grphSurfaceOffsetX = EVERGREEN_GRPH_SURFACE_OFFSET_X;
-		grphSurfaceOffsetY = EVERGREEN_GRPH_SURFACE_OFFSET_Y;
-		grphXStart = EVERGREEN_GRPH_X_START;
-		grphYStart = EVERGREEN_GRPH_Y_START;
-		grphXEnd = EVERGREEN_GRPH_X_END;
-		grphYEnd = EVERGREEN_GRPH_Y_END;
-		grphDesktopHeight = EVERGREEN_DESKTOP_HEIGHT;
-	} else {
-		// r600-r700 registers
-		regOffset = (crtNumber == 2) ? D2_REG_OFFSET : D1_REG_OFFSET;
-		grphEnable = D1GRPH_ENABLE;
-		grphControl = D1GRPH_CONTROL;
-		grphSwapControl = D1GRPH_SWAP_CNTL;
-		grphPrimarySurfaceAddr = D1GRPH_PRIMARY_SURFACE_ADDRESS;
-		grphPitch = D1GRPH_PITCH;
-		grphSurfaceOffsetX = D1GRPH_SURFACE_OFFSET_X;
-		grphSurfaceOffsetY = D1GRPH_SURFACE_OFFSET_Y;
-		grphXStart = D1GRPH_X_START;
-		grphYStart = D1GRPH_Y_START;
-		grphXEnd = D1GRPH_X_END;
-		grphYEnd = D1GRPH_Y_END;
-		grphDesktopHeight = D1MODE_DESKTOP_HEIGHT;
-	}
-
 	// disable R/B swap, disable tiling, disable 16bit alpha, etc.
-	write32AtMask(regOffset + grphEnable, 1, 0x00000001);
-	write32(regOffset + grphControl, 0);
+	write32AtMask(regOffset + gRegister->grphEnable, 1, 0x00000001);
+	write32(regOffset + gRegister->grphControl, 0);
 
 	switch (mode->space) {
 		case B_CMAP8:
-			write32AtMask(regOffset + grphControl, 0, 0x00000703);
+			write32AtMask(regOffset + gRegister->grphControl,
+				0, 0x00000703);
 			break;
 		case B_RGB15_LITTLE:
-			write32AtMask(regOffset + grphControl, 0x000001, 0x00000703);
+			write32AtMask(regOffset + gRegister->grphControl,
+				0x000001, 0x00000703);
 			break;
 		case B_RGB16_LITTLE:
-			write32AtMask(regOffset + grphControl, 0x000101, 0x00000703);
+			write32AtMask(regOffset + gRegister->grphControl,
+				0x000101, 0x00000703);
 			break;
 		case B_RGB24_LITTLE:
 		case B_RGB32_LITTLE:
 		default:
-			write32AtMask(regOffset + grphControl, 0x000002, 0x00000703);
+			write32AtMask(regOffset + gRegister->grphControl,
+				0x000002, 0x00000703);
 			break;
 	}
 
-	write32(regOffset + grphSwapControl, 0);
+	write32(regOffset + gRegister->grphSwapControl, 0);
 		// only for chipsets > r600
 		// R5xx - RS690 case is GRPH_CONTROL bit 16
 
 	uint32 fbIntAddress = read32(R6XX_CONFIG_FB_BASE);
 	uint32 fbOffset = gInfo->shared_info->frame_buffer_offset;
 
-	write32(regOffset + grphPrimarySurfaceAddr,
+	write32(regOffset + gRegister->grphPrimarySurfaceAddr,
 		fbOffset + fbIntAddress);
 
-	write32(regOffset + grphPitch, bytesPerRow / 4);
-	write32(regOffset + grphSurfaceOffsetX, 0);
-	write32(regOffset + grphSurfaceOffsetY, 0);
-	write32(regOffset + grphXStart, 0);
-	write32(regOffset + grphYStart, 0);
-	write32(regOffset + grphXEnd, mode->virtual_width);
-	write32(regOffset + grphYEnd, mode->virtual_height);
+	write32(regOffset + gRegister->grphPitch, bytesPerRow / 4);
+	write32(regOffset + gRegister->grphSurfaceOffsetX, 0);
+	write32(regOffset + gRegister->grphSurfaceOffsetY, 0);
+	write32(regOffset + gRegister->grphXStart, 0);
+	write32(regOffset + gRegister->grphYStart, 0);
+	write32(regOffset + gRegister->grphXEnd, mode->virtual_width);
+	write32(regOffset + gRegister->grphYEnd, mode->virtual_height);
 
 	/* D1Mode registers */
-	write32(regOffset + grphDesktopHeight, mode->virtual_height);
+	write32(regOffset + gRegister->grphDesktopHeight, mode->virtual_height);
 
 	// update shared info
 	gInfo->shared_info->bytes_per_row = bytesPerRow;
@@ -261,21 +217,8 @@ CardFBSet(int crtNumber, display_mode *mode)
 static void
 CardModeSet(int crtNumber, display_mode *mode)
 {
-	uint16_t chipset = gInfo->shared_info->device_chipset;
-
-	uint16_t regOffset = 0;
-	uint16_t grphControl = 0;
-
-	if (chipset >= RADEON_R800) {
-		// Evergreen registers differ from r600-r700
-		regOffset = (crtNumber == 2)
-			? EVERGREEN_CRTC1_REGISTER_OFFSET : EVERGREEN_CRTC0_REGISTER_OFFSET;
-		grphControl = EVERGREEN_GRPH_CONTROL;
-	} else {
-		// r600-r700 registers
-		regOffset = (crtNumber == 2) ? D2_REG_OFFSET : D1_REG_OFFSET;
-		grphControl = D1GRPH_CONTROL;
-	}
+	uint16_t regOffset = (crtNumber == 0)
+		? gRegister->regOffsetCRT0 : gRegister->regOffsetCRT1;
 
 	CardBlankSet(crtNumber, true);
 
@@ -285,7 +228,7 @@ CardModeSet(int crtNumber, display_mode *mode)
 		__func__, displayTiming.h_display, displayTiming.v_display);
 
 	// enable read requests
-	write32AtMask(regOffset + grphControl, 0, 0x01000000);
+	write32AtMask(regOffset + gRegister->grphControl, 0, 0x01000000);
 
 	// *** Horizontal
 	write32(regOffset + D1CRTC_H_TOTAL, displayTiming.h_total - 1);
diff --git a/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp b/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp
index 2068f9f902..ddfec97aee 100644
--- a/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp
+++ b/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp
@@ -104,6 +104,7 @@ const struct supported_device {
 
 	// R800 series (HD54xx - HD59xx)
 	// Codename: Evergreen
+	{0x68e1, RADEON_R800 | 0x0, "Radeon HD 5430"},	/*RV8XX*/
 	{0x68f9, RADEON_R800 | 0x0, "Radeon HD 5450"},	/*RV8XX*/
 	{0x68e0, RADEON_R800 | 0x0, "Radeon HD 5470"},	/*RV8XX*/
 	{0x68da, RADEON_R800 | 0x0, "Radeon HD 5500"},	/*RV8XX*/