Index: ni_usb_gpib.c
===================================================================
RCS file: /cvsroot/linux-gpib/linux-gpib/driver/ni_usb/ni_usb_gpib.c,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -b -B -r1.24 -r1.25
--- ni_usb_gpib.c	20 Nov 2004 23:50:01 -0000	1.24
+++ ni_usb_gpib.c	9 Dec 2004 02:21:57 -0000	1.25
@@ -745,7 +747,7 @@
 	{
 		writes[i].device = NIUSB_SUBDEV_TNT4882;
 		writes[i].address = CMDR;
-		writes[i].value = SETSC;
+		writes[i].value = CLRSC;	// ni usb seems to reverse polarity of SC bit?
 		i++;
 		writes[i].device = NIUSB_SUBDEV_TNT4882;
 		writes[i].address = nec7210_to_tnt4882_offset(AUXMR);
@@ -767,7 +769,7 @@
 		i++;
 		writes[i].device = NIUSB_SUBDEV_TNT4882;
 		writes[i].address = CMDR;
-		writes[i].value = CLRSC;
+		writes[i].value = SETSC;	// ni usb seems to reverse polarity of SC bit?
 		i++;
 	}
 	retval = ni_usb_write_registers(ni_priv, writes, i, &ibsta);
