Index: ram/uslice.c
===================================================================
--- ram/uslice.c	(revision 9519422d2490a88bcf340f649cfc8f6522d6d547)
+++ ram/uslice.c	(revision c3aee8afc950b40e838f51b1c1172c714ce819d7)
@@ -111,5 +111,5 @@
 */
 
-int16_t	pxtbl[][4] = {		/* pixel mask table for notes */
+uint16_t	pxtbl[][4] = {		/* pixel mask table for notes */
 
 	{ 0x0000, 0x0000, 0x0000, 0 },	/* 0 */
@@ -122,5 +122,5 @@
 };
 
-int16_t	epxtbl[][16] = {	/* pixel mask table for events */
+uint16_t	epxtbl[][16] = {	/* pixel mask table for events */
 
 	{ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,	/* 0 */