Ground unused pin on U16

abc80bus.sch

@@ -1306,8 +1306,6 @@ Text Label 6950 2100 2    50   ~ 0
 ~XMEMW80
 Text Label 6900 2200 2    50   ~ 0
 ~XM
-NoConn ~ 5850 1900
-NoConn ~ 4850 1900
 $Comp
 L power:GND #PWR0154
 U 1 1 60F4FADD
@@ -1870,6 +1868,36 @@ Wire Wire Line
 	6200 4300 6200 4450
 Wire Wire Line
 	6200 4450 5950 4450
+$Comp
+L power:GND #PWR0174
+U 1 1 603EF288
+P 4250 2000
+F 0 "#PWR0174" H 4250 1750 50  0001 C CNN
+F 1 "GND" H 4255 1827 50  0000 C CNN
+F 2 "" H 4250 2000 50  0001 C CNN
+F 3 "" H 4250 2000 50  0001 C CNN
+	1    4250 2000
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4250 2000 4250 1900
+Wire Wire Line
+	4250 1900 4850 1900
+$Comp
+L power:GND #PWR0175
+U 1 1 60405CE9
+P 6250 2350
+F 0 "#PWR0175" H 6250 2100 50  0001 C CNN
+F 1 "GND" H 6255 2177 50  0000 C CNN
+F 2 "" H 6250 2350 50  0001 C CNN
+F 3 "" H 6250 2350 50  0001 C CNN
+	1    6250 2350
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5850 1900 6250 1900
+Wire Wire Line
+	6250 1900 6250 2350
 Wire Wire Line
 	4400 1600 4750 1600
 Wire Wire Line