--- np2/io/gdc_sub.c	2004/01/13 05:30:58	1.4
+++ np2/io/gdc_sub.c	2004/01/31 20:05:23	1.6
@@ -390,6 +390,11 @@ void gdcsub_write(void) {
 	BYTE	*ptr;
 	UINT16	updatebit;
 
+	TRACEOUT(("gdcsub_write"));
+	if (grcg.gdcwithgrcg & 0x8) {
+		MessageBox(NULL, "!!! grcg working", "?", MB_OK);
+	}
+
 	mask = LOADINTELWORD(gdc.s.para + GDC_MASK);
 #if defined(BYTESEX_LITTLE)
 	switch(gdc.s.cmd & 0x18) {