Index: CPC stuff/nova/nova.bak
===================================================================
--- CPC stuff/nova/nova.bak	(revision 9696208325bec73580cab026818973d08300ae48)
+++ CPC stuff/nova/nova.bak	(revision 9696208325bec73580cab026818973d08300ae48)
@@ -0,0 +1,1046 @@
+EESchema Schematic File Version 4
+LIBS:nova-cache
+EELAYER 26 0
+EELAYER END
+$Descr User 10000 6000
+encoding utf-8
+Sheet 1 1
+Title "Nova 2021"
+Date "2021-02-23"
+Rev "1.0"
+Comp "PulkoTronics"
+Comment1 "RTC/NVRAM expansion for Amstrad CPC 6128/Plus"
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
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+U 1 1 60426A28
+P 7850 2650
+F 0 "#PWR011" H 7850 2750 30  0001 C CNN
+F 1 "VCC" H 7850 2750 30  0000 C CNN
+F 2 "" H 7850 2650 50  0001 C CNN
+F 3 "" H 7850 2650 50  0001 C CNN
+	1    7850 2650
+	0    -1   -1   0   
+$EndComp
+Text Notes 2800 1900 0    50   ~ 0
+MAPSEL is 0 on OUT FE82
+Text Notes 5650 4150 0    50   ~ 0
+RAM is enabled when SEL2=0 and SEL3=1\nAddress is selected by MAP1-3\n\nOUT FE82,0x -> map at 0000\nOUT FE82,2x -> map at 2000\nOUT FE82,4x -> map at 4000\n...\nOUT FE82,Ex -> map at E000\n\nPage is selected by SEL0-1\n(1 or 4 8K-pages available)\nOUT FE82,x8 -> Page 0\nOUT FE82,x9 -> Page 1\nOUT FE82,xA -> Page 2\nOUT FE82,xB -> Page 3\n\nOUT FE82,x0-x7 or xC-xF to disable the mapping
+$Comp
+L 74xx:74LS273 U7
+U 1 1 60426D23
+P 6450 1500
+F 0 "U7" H 6550 2300 50  0000 C CNN
+F 1 "74LS273" H 6650 2200 50  0000 C CNN
+F 2 "Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm" H 6450 1500 50  0001 C CNN
+F 3 "http://www.ti.com/lit/gpn/sn74LS273" H 6450 1500 50  0001 C CNN
+	1    6450 1500
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector_Generic:Conn_02x25_Odd_Even J1
+U 1 1 60427157
+P 1250 2050
+F 0 "J1" H 1300 3467 50  0000 C CNN
+F 1 "Conn_02x25_Odd_Even" H 1300 3376 50  0000 C CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_2x25_P2.54mm_Vertical" H 1250 2050 50  0001 C CNN
+F 3 "~" H 1250 2050 50  0001 C CNN
+	1    1250 2050
+	1    0    0    -1  
+$EndComp
+Text Label 850  2850 2    50   ~ 0
+RESET
+Text Label 5950 2000 2    50   ~ 0
+RESET
+$Comp
+L Device:C C4
+U 1 1 6043410B
+P 8800 1750
+F 0 "C4" H 8915 1796 50  0000 L CNN
+F 1 "C" H 8915 1705 50  0000 L CNN
+F 2 "Capacitor_SMD:C_1206_3216Metric" H 8838 1600 50  0001 C CNN
+F 3 "~" H 8800 1750 50  0001 C CNN
+	1    8800 1750
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR01
+U 1 1 604341B3
+P 800 3250
+F 0 "#PWR01" H 800 3000 50  0001 C CNN
+F 1 "GND" H 805 3077 50  0000 C CNN
+F 2 "" H 800 3250 50  0001 C CNN
+F 3 "" H 800 3250 50  0001 C CNN
+	1    800  3250
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR016
+U 1 1 604341EA
+P 8800 1950
+F 0 "#PWR016" H 8800 1700 50  0001 C CNN
+F 1 "GND" H 8805 1777 50  0000 C CNN
+F 2 "" H 8800 1950 50  0001 C CNN
+F 3 "" H 8800 1950 50  0001 C CNN
+	1    8800 1950
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3950 750  4150 750 
+Wire Wire Line
+	4150 750  4150 1000
+Wire Wire Line
+	3950 1450 4150 1450
+Wire Wire Line
+	4150 1450 4150 1200
+Wire Notes Line
+	2200 500  2200 3500
+Wire Notes Line
+	2200 3500 500  3500
+Wire Notes Line
+	7400 600  7400 2750
+Wire Notes Line
+	7400 2750 9500 2750
+Text GLabel 3250 1350 0    60   Output ~ 0
+WR
+$Comp
+L 74xx:74LS138 U6
+U 1 1 6049D6A2
+P 4800 1300
+F 0 "U6" H 4900 1900 50  0000 C CNN
+F 1 "74LS138" H 5000 1800 50  0000 C CNN
+F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 4800 1300 50  0001 C CNN
+F 3 "http://www.ti.com/lit/gpn/sn74LS138" H 4800 1300 50  0001 C CNN
+	1    4800 1300
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4150 1000 4300 1000
+Wire Wire Line
+	3950 1100 4300 1100
+Wire Wire Line
+	4150 1200 4300 1200
+Wire Wire Line
+	4200 1700 4300 1700
+$Comp
+L power:VCC #PWR07
+U 1 1 604C231B
+P 4800 700
+F 0 "#PWR07" H 4800 800 30  0001 C CNN
+F 1 "VCC" H 4800 800 30  0000 C CNN
+F 2 "" H 4800 700 50  0001 C CNN
+F 3 "" H 4800 700 50  0001 C CNN
+	1    4800 700 
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR08
+U 1 1 604C234E
+P 4800 2000
+F 0 "#PWR08" H 4800 1750 50  0001 C CNN
+F 1 "GND" H 4805 1827 50  0000 C CNN
+F 2 "" H 4800 2000 50  0001 C CNN
+F 3 "" H 4800 2000 50  0001 C CNN
+	1    4800 2000
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:VCC #PWR06
+U 1 1 604C2797
+P 4300 1500
+F 0 "#PWR06" H 4300 1600 30  0001 C CNN
+F 1 "VCC" H 4300 1600 30  0000 C CNN
+F 2 "" H 4300 1500 50  0001 C CNN
+F 3 "" H 4300 1500 50  0001 C CNN
+	1    4300 1500
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5300 1700 5650 1700
+Wire Wire Line
+	5650 1700 5650 1900
+Text Label 5350 1700 0    50   ~ 0
+MAPSEL
+$Comp
+L power:GND #PWR014
+U 1 1 604E72AB
+P 8600 4650
+F 0 "#PWR014" H 8600 4400 50  0001 C CNN
+F 1 "GND" H 8605 4477 50  0000 C CNN
+F 2 "" H 8600 4650 50  0001 C CNN
+F 3 "" H 8600 4650 50  0001 C CNN
+	1    8600 4650
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	8800 4550 8800 4650
+Wire Wire Line
+	8600 4650 8800 4650
+Connection ~ 8800 4650
+Wire Wire Line
+	8800 4650 8800 4750
+NoConn ~ 6950 1700
+$Comp
+L 74xx:74LS30 U3
+U 2 1 604FD7CB
+P 8850 3450
+F 0 "U3" H 8850 3450 50  0000 C CNN
+F 1 "74LS30" H 8850 3250 50  0000 C CNN
+F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 8850 3450 50  0001 C CNN
+F 3 "http://www.ti.com/lit/gpn/sn74LS30" H 8850 3450 50  0001 C CNN
+	2    8850 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L 74xx:74LS27 U5
+U 4 1 604FD876
+P 8450 3450
+F 0 "U5" H 8450 3450 50  0000 C CNN
+F 1 "74LS27" H 8750 3350 50  0000 C CNN
+F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 8450 3450 50  0001 C CNN
+F 3 "http://www.ti.com/lit/gpn/sn74LS27" H 8450 3450 50  0001 C CNN
+	4    8450 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L 74xx:74HC86 U1
+U 5 1 604FDB3C
+P 8050 3450
+F 0 "U1" H 8280 3496 50  0000 L CNN
+F 1 "74HC86" H 8280 3405 50  0000 L CNN
+F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 8050 3450 50  0001 C CNN
+F 3 "http://www.ti.com/lit/gpn/sn74HC86" H 8050 3450 50  0001 C CNN
+	5    8050 3450
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	8050 2950 8300 2950
+Connection ~ 8450 2950
+Wire Wire Line
+	8450 2950 8850 2950
+Wire Wire Line
+	8050 3950 8300 3950
+Connection ~ 8450 3950
+Wire Wire Line
+	8450 3950 8850 3950
+$Comp
+L power:VCC #PWR012
+U 1 1 6050CE66
+P 8300 2950
+F 0 "#PWR012" H 8300 3050 30  0001 C CNN
+F 1 "VCC" H 8300 3050 30  0000 C CNN
+F 2 "" H 8300 2950 50  0001 C CNN
+F 3 "" H 8300 2950 50  0001 C CNN
+	1    8300 2950
+	1    0    0    -1  
+$EndComp
+Connection ~ 8300 3950
+Wire Wire Line
+	8300 3950 8450 3950
+Connection ~ 8300 2950
+Wire Wire Line
+	8300 2950 8450 2950
+$Comp
+L power:GND #PWR013
+U 1 1 6050CF7C
+P 8300 3950
+F 0 "#PWR013" H 8300 3700 50  0001 C CNN
+F 1 "GND" H 8305 3777 50  0000 C CNN
+F 2 "" H 8300 3950 50  0001 C CNN
+F 3 "" H 8300 3950 50  0001 C CNN
+	1    8300 3950
+	1    0    0    -1  
+$EndComp
+$Comp
+L pspice:DIODE D1
+U 1 1 60516A39
+P 3650 5050
+F 0 "D1" H 3250 5150 50  0000 C CNN
+F 1 "DIODE" H 3450 5150 50  0000 C CNN
+F 2 "Diode_SMD:D_0805_2012Metric" H 3650 5050 50  0001 C CNN
+F 3 "~" H 3650 5050 50  0001 C CNN
+	1    3650 5050
+	-1   0    0    1   
+$EndComp
+$Comp
+L pspice:DIODE D2
+U 1 1 60516B01
+P 3650 5350
+F 0 "D2" H 3250 5450 50  0000 C CNN
+F 1 "DIODE" H 3450 5450 50  0000 C CNN
+F 2 "Diode_SMD:D_0805_2012Metric" H 3650 5350 50  0001 C CNN
+F 3 "~" H 3650 5350 50  0001 C CNN
+	1    3650 5350
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	2850 4150 2850 4750
+Wire Wire Line
+	2850 4950 2850 5300
+$Comp
+L power:VCC #PWR0101
+U 1 1 60558A19
+P 2750 5300
+F 0 "#PWR0101" H 2750 5400 30  0001 C CNN
+F 1 "VCC" H 2750 5400 30  0000 C CNN
+F 2 "" H 2750 5300 50  0001 C CNN
+F 3 "" H 2750 5300 50  0001 C CNN
+	1    2750 5300
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2750 5300 2850 5300
+Wire Wire Line
+	3450 4850 3450 5050
+Connection ~ 3450 5050
+Wire Wire Line
+	3450 5050 3450 5300
+Wire Wire Line
+	3250 1450 3350 1450
+Wire Wire Line
+	4200 1600 4300 1600
+Wire Wire Line
+	3200 1100 3200 1000
+$Comp
+L Device:R R1
+U 1 1 605AC2A0
+P 3100 5300
+F 0 "R1" V 3100 5300 50  0000 C CNN
+F 1 "1K" V 3200 5300 50  0000 C CNN
+F 2 "Resistor_SMD:R_0805_2012Metric" V 3030 5300 50  0001 C CNN
+F 3 "~" H 3100 5300 50  0001 C CNN
+	1    3100 5300
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	2850 5300 2950 5300
+Connection ~ 2850 5300
+Wire Wire Line
+	3250 5300 3450 5300
+Connection ~ 3450 5300
+Wire Wire Line
+	3450 5300 3450 5350
+$EndSCHEMATC
