diff -ur usrp-0.8/firmware/include/fpga_regs_standard.h usrp-0.8-usb11/firmware/include/fpga_regs_standard.h
--- usrp-0.8/firmware/include/fpga_regs_standard.h	2004-12-10 23:25:42.000000000 -0500
+++ usrp-0.8-usb11/firmware/include/fpga_regs_standard.h	2005-04-18 15:48:58.000000000 -0400
@@ -103,6 +103,7 @@
 //  3   chan 1 Q
 
 #define	FR_TX_MUX		39
+#define FR_USB_PACKET_SIZE	40
 
 #endif /* INCLUDED_FPGA_REGS_STANDARD_H */
 
diff -ur usrp-0.8/firmware/src/common/usrp_common.c usrp-0.8-usb11/firmware/src/common/usrp_common.c
--- usrp-0.8/firmware/src/common/usrp_common.c	2004-03-28 17:28:58.000000000 -0500
+++ usrp-0.8-usb11/firmware/src/common/usrp_common.c	2005-04-17 12:10:26.000000000 -0400
@@ -101,9 +101,13 @@
   // set autoin length for EP6
   // FIXME should be f(enumeration)
 
-  EP6AUTOINLENH = (512) >> 8;	SYNCDELAY;  // this is the length for high speed
-  EP6AUTOINLENL = (512) & 0xff; SYNCDELAY;
-
+  if (USBCS & bmHSM) {
+    EP6AUTOINLENH = (512) >> 8;	SYNCDELAY;  // this is the length for high speed
+    EP6AUTOINLENL = (512) & 0xff; SYNCDELAY;
+  } else {
+    EP6AUTOINLENH = (64) >> 8;	SYNCDELAY;  // this is the length for full speed
+    EP6AUTOINLENL = (64) & 0xff; SYNCDELAY;
+  }
   init_board ();
 }
 
diff -ur usrp-0.8/firmware/src/usrp2/usb_descriptors.a51 usrp-0.8-usb11/firmware/src/usrp2/usb_descriptors.a51
--- usrp-0.8/firmware/src/usrp2/usb_descriptors.a51	2004-12-08 16:11:24.000000000 -0500
+++ usrp-0.8-usb11/firmware/src/usrp2/usb_descriptors.a51	2005-04-14 11:51:07.000000000 -0400
@@ -236,7 +236,7 @@
 	.db	DSCR_CONFIG
 	.db	<(_full_speed_config_descr_end - _full_speed_config_descr) ; LSB
 	.db	>(_full_speed_config_descr_end - _full_speed_config_descr) ; MSB
-	.db	1		; bNumInterfaces
+	.db	3		; bNumInterfaces
 	.db	1		; bConfigurationValue
 	.db	0		; iConfiguration
 	.db	0x80 | bmSELF_POWERED ; bmAttributes
@@ -253,7 +253,53 @@
 	.db	0xff		; bInterfaceSubClass (vendor specific)
 	.db	0xff		; bInterfaceProtocol (vendor specific)
 	.db	SI_COMMAND_AND_STATUS	; iInterface (description)
+
+	;; interface descriptor 1 (transmit path, ep2 OUT BULK)
+	
+	.db	DSCR_INTRFC_LEN
+	.db	DSCR_INTRFC
+	.db	1		; bInterfaceNumber (zero based)
+	.db	0		; bAlternateSetting
+	.db	1		; bNumEndpoints
+	.db	0xff		; bInterfaceClass (vendor specific)
+	.db	0xff		; bInterfaceSubClass (vendor specific)
+	.db	0xff		; bInterfaceProtocol (vendor specific)
+	.db	SI_TX_PATH	; iInterface (description)
+
+	;; interface 1's end point
+
+	.db	DSCR_ENDPNT_LEN
+	.db	DSCR_ENDPNT
+	.db	0x02		; bEndpointAddress (ep 2 OUT)
+	.db	ET_BULK		; bmAttributes
+	.db	<64		; wMaxPacketSize (LSB)
+	.db	>64		; wMaxPacketSize (MSB)
+	.db	0		; bInterval (iso only)
+
+	;; interface descriptor 2 (receive path, ep6 IN BULK)
+	
+	.db	DSCR_INTRFC_LEN
+	.db	DSCR_INTRFC
+	.db	2		; bInterfaceNumber (zero based)
+	.db	0		; bAlternateSetting
+	.db	1		; bNumEndpoints
+	.db	0xff		; bInterfaceClass (vendor specific)
+	.db	0xff		; bInterfaceSubClass (vendor specific)
+	.db	0xff		; bInterfaceProtocol (vendor specific)
+	.db	SI_RX_PATH	; iInterface (description)
+
+	;; interface 2's end point
+
+	.db	DSCR_ENDPNT_LEN
+	.db	DSCR_ENDPNT
+	.db	0x86		; bEndpointAddress (ep 6 IN)
+	.db	ET_BULK		; bmAttributes
+	.db	<64		; wMaxPacketSize (LSB)
+	.db	>64		; wMaxPacketSize (MSB)
+	.db	0		; bInterval (iso only)
+
 	
+		
 _full_speed_config_descr_end: