diff --git a/BaS_gcc/Makefile b/BaS_gcc/Makefile
index 1deb148..848bdbb 100644
--- a/BaS_gcc/Makefile
+++ b/BaS_gcc/Makefile
@@ -10,7 +10,7 @@
 
 # can be either "Y" or "N" (without quotes). "Y" for using the m68k-elf-, "N" for using the m68k-atari-mint
 # toolchain
-COMPILE_ELF=N
+COMPILE_ELF=Y
 
 ifeq (Y,$(COMPILE_ELF))
 TCPREFIX=m68k-elf-
@@ -84,6 +84,7 @@ CSRCS= \
 	$(SRCDIR)/MCD_tasksInit.c \
 	\
 	$(SRCDIR)/usb.c \
+	$(SRCDIR)/usb_mem.c \
 	$(SRCDIR)/ohci-hcd.c \
 	$(SRCDIR)/ehci-hcd.c \
 	\
diff --git a/BaS_gcc/bas.lk.in b/BaS_gcc/bas.lk.in
index 7ac7145..6e59054 100644
--- a/BaS_gcc/bas.lk.in
+++ b/BaS_gcc/bas.lk.in
@@ -13,7 +13,7 @@ MEMORY
    /*
 	* target to copy BaS data segment to. 20k should be enough for now
 	*/
-   bas_ram (WX) : ORIGIN = 0x1FFFB000, LENGTH = 0x005000
+   bas_ram (WX) : ORIGIN = 0x1FFFB000, LENGTH = 0x900000
 }
 
 SECTIONS
@@ -35,6 +35,7 @@ SECTIONS
 		OBJDIR/mmu.o(.text)		
 		OBJDIR/pci.o(.text)
 		OBJDIR/usb.o(.text)
+		OBJDIR/usb_mem.o(.text)
 		OBJDIR/ohci-hcd.o(.text)
 		OBJDIR/ehci-hcd.o(.text)
 		
@@ -75,6 +76,9 @@ SECTIONS
 		*(.rodata)
 		*(.rodata.*)
 #endif
+		. = ALIGN(16);
+		_usb_buffer = .;
+		//. = . + USB_BUFFER_SIZE;
 	} > bas_rom
 
 #if (TARGET_ADDRESS == BOOTFLASH_BASE_ADDRESS)
@@ -97,6 +101,8 @@ SECTIONS
 		 	 * is a multiple of the following value.
 		 	 */
 			. = ALIGN(16);
+			_usb_buffer = .;
+			//. = . + USB_BUFFER_SIZE;
 		} > bas_ram
 #endif
 
diff --git a/BaS_gcc/include/firebee.h b/BaS_gcc/include/firebee.h
index 6bcf617..1699027 100644
--- a/BaS_gcc/include/firebee.h
+++ b/BaS_gcc/include/firebee.h
@@ -42,4 +42,6 @@
 #define TARGET_ADDRESS  BOOTFLASH_BASE_ADDRESS
 #endif /* COMPILE_RAM */
 
+#define  USB_BUFFER_SIZE   0x80000
+
 #endif /* _FIREBEE_H_ */
diff --git a/BaS_gcc/include/m5484l.h b/BaS_gcc/include/m5484l.h
index b10751b..2bc2740 100644
--- a/BaS_gcc/include/m5484l.h
+++ b/BaS_gcc/include/m5484l.h
@@ -16,4 +16,6 @@
 #define TARGET_ADDRESS	BOOTFLASH_BASE_ADDRESS
 #endif /* COMPILE_RAM */
 
+#define	USB_BUFFER_SIZE	0x80000
+
 #endif /* _M5484L_H_ */
diff --git a/BaS_gcc/include/pci.h b/BaS_gcc/include/pci.h
index 3f05f18..470d664 100644
--- a/BaS_gcc/include/pci.h
+++ b/BaS_gcc/include/pci.h
@@ -210,7 +210,7 @@ struct resource_descriptor
 	uint8_t	private;
 } __attribute__ ((packed));
 
-extern uint16_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index);
+extern int16_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index);
 
 extern uint32_t pci_read_config_longword(uint16_t handle, uint16_t offset);
 extern uint16_t pci_read_config_word(uint16_t handle, uint16_t offset);
diff --git a/BaS_gcc/sources/ehci-hcd.c b/BaS_gcc/sources/ehci-hcd.c
index ae12300..3b1d9d1 100644
--- a/BaS_gcc/sources/ehci-hcd.c
+++ b/BaS_gcc/sources/ehci-hcd.c
@@ -24,6 +24,7 @@
 
 #include "util.h"		/* for endian conversions */
 #include "wait.h"
+#include "cache.h"
 #include "usb.h"
 #include "ehci.h"
 
@@ -177,15 +178,7 @@ static struct ehci {
 
 static void cache_qtd(struct qTD *qtd, int flush)
 {
-	uint32_t *ptr = (uint32_t *) swpl(qtd->qt_buffer[0]);
-	int len = (qtd->qt_token & 0x7fff0000) >> 16;
-
-	flush_invalidate((uint32_t)qtd, sizeof(struct qTD), flush);
-	if((ptr != NULL) && len)
-	{
-		ptr += gehci.dma_offset;
-		flush_invalidate((uint32_t)ptr, len, flush);
-	}
+	flush_and_invalidate_caches();
 }
 
 static inline struct QH *qh_addr(struct QH *qh)
@@ -201,7 +194,7 @@ static void cache_qh(struct QH *qh, int flush)
 	/* Walk the QH list and flush/invalidate all entries */
 	while(1)
 	{
-		flush_invalidate((uint32_t)qh_addr(qh), sizeof(struct QH), flush);
+		flush_and_invalidate_caches();
 		if((uint32_t)qh & QH_LINK_TYPE_QH)
 			break;
 		qh = qh_addr(qh);
@@ -255,7 +248,7 @@ static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 		result &= mask;
 		if(result == done)
 			return 0;
-		udelay(1);
+		wait(1);
 		usec--;
 	}
 	while(usec > 0);
diff --git a/BaS_gcc/sources/exceptions.S b/BaS_gcc/sources/exceptions.S
index bf03164..5785172 100644
--- a/BaS_gcc/sources/exceptions.S
+++ b/BaS_gcc/sources/exceptions.S
@@ -64,6 +64,7 @@
 #define MCF_PSC3_PSCTB_8BIT                 __MBAR+0x890C
 
 		.global	_vec_init
+		.global	_asm_set_ipl
 
 		// interrupt sources
 		.equ	INT_SOURCE_EPORT_EPF1,1		// edge port flag 1
diff --git a/BaS_gcc/sources/ohci-hcd.c b/BaS_gcc/sources/ohci-hcd.c
index 19c9301..8ecd1eb 100644
--- a/BaS_gcc/sources/ohci-hcd.c
+++ b/BaS_gcc/sources/ohci-hcd.c
@@ -78,10 +78,35 @@
 
 #define min_t(type, x, y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
 
-struct pci_device_id ohci_usb_pci_table[] = {
-	{ PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5237, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_SERIAL_USB_OHCI, 0, 0 }, /* ULI1575 PCI OHCI module ids */
-	{ PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_SERIAL_USB_OHCI, 0, 0 }, /* NEC PCI OHCI module ids */
-	{ PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_ISP1561, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_SERIAL_USB_OHCI, 0, 0 }, /* Philips 1561 PCI OHCI module ids */
+struct pci_device_id ohci_usb_pci_table[] =
+{
+	{
+		PCI_VENDOR_ID_AL,
+		PCI_DEVICE_ID_AL_M5237,
+		PCI_ANY_ID,
+		PCI_ANY_ID,
+		PCI_CLASS_SERIAL_USB_OHCI,
+		0,
+		0
+	}, /* ULI1575 PCI OHCI module ids */
+	{
+		PCI_VENDOR_ID_NEC,
+		PCI_DEVICE_ID_NEC_USB,
+		PCI_ANY_ID,
+		PCI_ANY_ID,
+		PCI_CLASS_SERIAL_USB_OHCI,
+		0,
+		0
+	}, /* NEC PCI OHCI module ids */
+	{
+		PCI_VENDOR_ID_PHILIPS,
+		PCI_DEVICE_ID_PHILIPS_ISP1561,
+		PCI_ANY_ID,
+		PCI_ANY_ID,
+		PCI_CLASS_SERIAL_USB_OHCI,
+		0,
+		0
+	}, /* Philips 1561 PCI OHCI module ids */
 	/* Please add supported PCI OHCI controller ids here */
 	{ 0, 0, 0, 0, 0, 0, 0 }
 };
diff --git a/BaS_gcc/sources/pci.c b/BaS_gcc/sources/pci.c
index 026870a..e061054 100644
--- a/BaS_gcc/sources/pci.c
+++ b/BaS_gcc/sources/pci.c
@@ -164,7 +164,7 @@ struct resource_descriptor *pci_get_resource(uint16_t handle)
 	return (struct resource_descriptor *) 0L;
 }
 
-uint16_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index)
+int16_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index)
 {
 	uint16_t bus;
 	uint16_t slot;
@@ -184,16 +184,23 @@ uint16_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index)
 				value = pci_read_config_longword(handle, 0);
 				if (value != 0xffffffff)	/* we have a device at this position */
 				{
-					if (vendor_id == 0xffff)	/* ignore vendor id */
+					if (vendor_id == 0xffff && pos == index)	/* ignore device id */
 					{
 						return handle;
 					}
-					else if (PCI_VENDOR_ID(value) == vendor_id && PCI_DEVICE_ID(value) == device_id)
+					else
+					{
+						/* we found a match, but at wrong position */
+						pos++;
+						continue;
+					}
+					if (PCI_VENDOR_ID(value) == vendor_id && PCI_DEVICE_ID(value) == device_id)
 					{
 						if (pos == index)
 							return handle;
-						pos++;
 					}
+					else
+						pos++;
 				}
 			}
 		}
diff --git a/BaS_gcc/sources/sysinit.c b/BaS_gcc/sources/sysinit.c
index 17cb42a..75ee18c 100644
--- a/BaS_gcc/sources/sysinit.c
+++ b/BaS_gcc/sources/sysinit.c
@@ -44,6 +44,10 @@
 #include "m5484l.h"
 #endif /* MACHINE_M5484LITE */
 
+#include "mod_devicetable.h"
+#include "pci_ids.h"
+#include "usb.h"
+
 #define UNUSED(x) (void)(x)               /* Unused variable         */
 
 extern volatile long _VRAM;	/* start address of video ram from linker script */
@@ -491,35 +495,71 @@ void init_video_ddr(void) {
 
 
 /*
- * probe for UPC720101 (USB)
+ * probe for NEC compatible USB host controller and install if found
  */
-void test_upd720101(void) 
+void init_usb(void) 
 {
-	xprintf("UDP720101 USB controller initialization: ");
+	extern struct pci_device_id ohci_usb_pci_table[];
+	extern struct pci_device_id ehci_usb_pci_table[];
+	struct pci_device_id *board;
+	int16_t handle;
+	uint16_t usb_found;
+	int index = 0;
 
-	/* select UPD720101 AD17 */
-	MCF_PCI_PCICAR = MCF_PCI_PCICAR_E +
-		MCF_PCI_PCICAR_DEVNUM(17) +
-		MCF_PCI_PCICAR_FUNCNUM(0) +
-		MCF_PCI_PCICAR_DWORD(0);
+	xprintf("USB controller initialization: ");
 
-	if (* (uint32_t *) PCI_IO_OFFSET == 0x33103500)
+	do
 	{
-		MCF_PCI_PCICAR = MCF_PCI_PCICAR_E + 
-			MCF_PCI_PCICAR_DEVNUM(17) +
-			MCF_PCI_PCICAR_FUNCNUM(0) +
-			MCF_PCI_PCICAR_DWORD(57);
+		handle = pci_find_device(0x0000, 0xffffL, index++);
+		xprintf("checking %d\r\n", handle);
+		if (handle > 0)
+		{
+			uint32_t id = 0;
+			uint32_t class = 0;
 
-		* (uint8_t *) PCI_IO_OFFSET = 0x20;
-	}
-	else
-	{
-		xprintf("NOT ");
+			xprintf("ckecking board #%d, handle %d\r\n", index, handle);
+			id = pci_read_config_longword(handle, PCIIDR);
+			class = pci_read_config_longword(handle, PCIREV);
+
+			if (class >> 16 == PCI_CLASS_SERIAL_USB)
+			{
+				xprintf("serial USB found at #%d\r\n", handle);
+				if (class >> 8 == PCI_CLASS_SERIAL_USB_EHCI)
+				{
+					board = ehci_usb_pci_table;
+					while (board->vendor)
+					{
+						xprintf("ckecking %x against %x\r\n", board->vendor, id & 0xffff); 
+						if ((board->vendor == (id & 0xffff)) && board->device == (id >> 16))
+						{
+							xprintf("board match at handle %x\r\n", handle);
+							if (usb_init(handle, board) >= 0)
+							{
+								usb_found++;
+							}
+						}
+						board++;
+					}
+				}
+				if (class >> 8 == PCI_CLASS_SERIAL_USB_OHCI)
+				{
+					board = ohci_usb_pci_table;
+					while (board->vendor)
+					{
+						xprintf("ckecking %x against %x\r\n", board->vendor, id & 0xffff); 
+						if ((board->vendor == (id & 0xffff)) && board->device == (id >> 16))
+						{
+							xprintf("board match at handle %x\r\n", handle);
+							if (usb_init(handle, board) >= 0)
+								usb_found++;
+						}
+						board++;
+					}
+				}
+			}
+		}
+	} while (handle >= 0);
 
-		MCF_PCI_PCICAR = MCF_PCI_PCICAR_DEVNUM(17) +
-			MCF_PCI_PCICAR_FUNCNUM(0) +
-			MCF_PCI_PCICAR_DWORD(57);
-	}
 	xprintf("finished\r\n");
 }
 
@@ -976,7 +1016,7 @@ void initialize_hardware(void)
 	init_video_ddr();
 	dvi_on();
 #endif /* MACHINE_FIREBEE */
-	test_upd720101();
+	init_usb();
 	//video_1280_1024();
 #ifdef MACHINE_FIREBEE
 	init_ac97();
diff --git a/BaS_gcc/sources/usb.c b/BaS_gcc/sources/usb.c
index 7acfffb..c3dd879 100644
--- a/BaS_gcc/sources/usb.c
+++ b/BaS_gcc/sources/usb.c
@@ -150,25 +150,23 @@ int usb_init(long handle, const struct pci_device_id *ent)
 		return res;
 	}
 	usb_hub_reset(bus_index);
+
 	/* init low_level USB */
 	xprintf("USB: ");
 	switch(ent->class)
 	{
-#ifdef CONFIG_USB_UHCI
 		case PCI_CLASS_SERIAL_USB_UHCI:
-			res = uhci_usb_lowlevel_init(handle, ent, &priv);
+			//res = uhci_usb_lowlevel_init(handle, ent, &priv);
+			xprintf("sorry, no uhci driver available\r\n");
 			break;
-#endif
-#ifdef CONFIG_USB_OHCI
 		case PCI_CLASS_SERIAL_USB_OHCI:
+			xprintf("initialize ohci interface, ");
 			res = ohci_usb_lowlevel_init(handle, ent, &priv);
 			break;
-#endif
-#ifdef CONFIG_USB_EHCI
 		case PCI_CLASS_SERIAL_USB_EHCI:
+			xprintf("initialize ehci interface, ");
 			res = ehci_usb_lowlevel_init(handle, ent, &priv);
 			break;
-#endif
 		default: res = -1; break;
 	}
 	if(!res)
@@ -1087,6 +1085,7 @@ void usb_scan_devices(void *priv)
 	}
 	{
 		/* insert "driver" if possible */
+#ifdef _NOT_USED_
 		if (drv_usb_kbd_init() < 0)
 			xprintf("No USB keyboard found\r\n");	
 		else
@@ -1095,6 +1094,7 @@ void usb_scan_devices(void *priv)
 			xprintf("No USB mouse found\r\n");	
 		else
 			xprintf("USB HID mouse driver installed\r\n");
+#endif /* _NOT_USED */
 	}
 	xprintf("Scan end\r\n");
 }