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
Wire Wire Line
	1050 2050 850  2050
Wire Wire Line
	1050 1850 850  1850
Wire Wire Line
	1550 2750 1700 2750
Wire Wire Line
	1550 2650 1700 2650
Wire Wire Line
	1550 2550 1700 2550
Wire Wire Line
	1550 2450 1700 2450
Wire Wire Line
	1550 2350 1700 2350
Wire Wire Line
	1550 2250 1700 2250
Wire Wire Line
	1550 1650 1700 1650
Wire Wire Line
	1550 1450 1700 1450
Wire Wire Line
	1550 1250 1700 1250
Wire Wire Line
	1550 1050 1700 1050
Wire Wire Line
	1550 1950 1850 1950
Wire Wire Line
	1550 1750 1850 1750
Wire Wire Line
	1550 3150 1700 3150
Wire Wire Line
	1550 2950 1700 2950
Wire Wire Line
	1050 850  850  850 
Wire Wire Line
	1050 2550 850  2550
Wire Wire Line
	1050 2750 850  2750
Wire Wire Line
	1050 3050 850  3050
Wire Wire Line
	800  3250 1050 3250
Wire Wire Line
	800  2350 1050 2350
Wire Wire Line
	800  2450 1050 2450
Wire Wire Line
	1050 3150 850  3150
Wire Wire Line
	1050 2850 850  2850
Wire Wire Line
	1050 2650 850  2650
Wire Wire Line
	1050 2250 850  2250
Wire Wire Line
	1550 3050 1700 3050
Wire Wire Line
	1550 3250 1700 3250
Wire Wire Line
	850  2950 1050 2950
Wire Wire Line
	1550 1850 1850 1850
Wire Wire Line
	1550 2050 1850 2050
Wire Wire Line
	1550 950  1700 950 
Wire Wire Line
	1550 1150 1700 1150
Wire Wire Line
	1550 1350 1700 1350
Wire Wire Line
	1550 1550 1700 1550
Wire Wire Line
	1050 950  900  950 
Wire Wire Line
	1050 1050 900  1050
Wire Wire Line
	1050 1150 900  1150
Wire Wire Line
	1050 1250 900  1250
Wire Wire Line
	1050 1350 900  1350
Wire Wire Line
	1050 1450 900  1450
Wire Wire Line
	1050 1550 900  1550
Wire Wire Line
	1050 1650 900  1650
Wire Wire Line
	850  2150 1050 2150
Wire Wire Line
	1550 2850 1750 2850
Wire Wire Line
	1550 2150 1700 2150
Wire Wire Line
	1050 1750 850  1750
Wire Wire Line
	1050 1950 850  1950
Text GLabel 1700 2150 2    60   Output ~ 0
MREQ
NoConn ~ 1700 2550
NoConn ~ 1700 2450
NoConn ~ 1700 2250
$Comp
L power:VCC #PWR02
U 1 1 4DBBEA82
P 850 2150
F 0 "#PWR02" H 850 2250 30  0001 C CNN
F 1 "VCC" H 850 2250 30  0000 C CNN
F 2 "" H 850 2150 50  0001 C CNN
F 3 "" H 850 2150 50  0001 C CNN
	1    850  2150
	0    -1   -1   0   
$EndComp
Text Label 900  950  0    60   ~ 0
A15
Text Label 1700 950  0    60   ~ 0
A14
Text Label 900  1050 0    60   ~ 0
A13
Text Label 1700 1050 0    60   ~ 0
A12
Text Label 900  1150 0    60   ~ 0
A11
Text Label 1700 1150 0    60   ~ 0
A10
Text Label 900  1250 0    60   ~ 0
A9
Text Label 1700 1250 0    60   ~ 0
A8
Text Label 900  1350 0    60   ~ 0
A7
Text Label 1700 1350 0    60   ~ 0
A6
Text Label 900  1450 0    60   ~ 0
A5
Text Label 1700 1450 0    60   ~ 0
A4
Text Label 900  1550 0    60   ~ 0
A3
Text Label 1700 1550 0    60   ~ 0
A2
Text Label 900  1650 0    60   ~ 0
A1
Text Label 1700 1650 0    60   ~ 0
A0
Text Label 850  1750 0    60   ~ 0
D7
Text Label 850  1850 0    60   ~ 0
D5
Text Label 850  1950 0    60   ~ 0
D3
Text Label 850  2050 0    60   ~ 0
D1
Text Label 1700 1750 0    60   ~ 0
D6
Text Label 1700 1850 0    60   ~ 0
D4
Text Label 1700 1950 0    60   ~ 0
D2
Text Label 1700 2050 0    60   ~ 0
D0
NoConn ~ 1700 3050
NoConn ~ 1700 3150
NoConn ~ 1700 3250
NoConn ~ 850  850 
NoConn ~ 850  2250
NoConn ~ 850  2550
NoConn ~ 850  2650
NoConn ~ 850  2750
NoConn ~ 850  3150
Text GLabel 800  2450 0    60   Output ~ 0
WR
Text GLabel 800  2350 0    60   Output ~ 0
IORQ
NoConn ~ 1700 2650
$Comp
L power:VCC #PWR015
U 1 1 5FB4DE9C
P 8800 1600
F 0 "#PWR015" H 8800 1700 30  0001 C CNN
F 1 "VCC" H 8800 1700 30  0000 C CNN
F 2 "" H 8800 1600 50  0001 C CNN
F 3 "" H 8800 1600 50  0001 C CNN
	1    8800 1600
	1    0    0    -1  
$EndComp
$Comp
L Device:C C1
U 1 1 5FB4DF4E
P 7600 1750
F 0 "C1" H 7715 1796 50  0000 L CNN
F 1 "C" H 7715 1705 50  0000 L CNN
F 2 "Capacitor_SMD:C_1206_3216Metric" H 7638 1600 50  0001 C CNN
F 3 "~" H 7600 1750 50  0001 C CNN
	1    7600 1750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C2
U 1 1 5FB4E00C
P 8000 1750
F 0 "C2" H 8115 1796 50  0000 L CNN
F 1 "C" H 8115 1705 50  0000 L CNN
F 2 "Capacitor_SMD:C_1206_3216Metric" H 8038 1600 50  0001 C CNN
F 3 "~" H 8000 1750 50  0001 C CNN
	1    8000 1750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C3
U 1 1 5FB4E067
P 8450 1750
F 0 "C3" H 8565 1796 50  0000 L CNN
F 1 "C" H 8565 1705 50  0000 L CNN
F 2 "Capacitor_SMD:C_1206_3216Metric" H 8488 1600 50  0001 C CNN
F 3 "~" H 8450 1750 50  0001 C CNN
	1    8450 1750
	1    0    0    -1  
$EndComp
$Comp
L Device:CP C5
U 1 1 5FB4E0EC
P 9250 1750
F 0 "C5" H 9368 1796 50  0000 L CNN
F 1 "CP" H 9368 1705 50  0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 9288 1600 50  0001 C CNN
F 3 "~" H 9250 1750 50  0001 C CNN
	1    9250 1750
	1    0    0    -1  
$EndComp
Wire Wire Line
	7600 1600 8000 1600
Wire Wire Line
	8000 1600 8450 1600
Connection ~ 8000 1600
Connection ~ 8450 1600
Wire Wire Line
	7600 1900 8000 1900
Wire Wire Line
	8000 1900 8450 1900
Connection ~ 8000 1900
Connection ~ 8450 1900
Text Label 850  3050 2    50   ~ 0
RAMDIS
NoConn ~ 1750 2850
NoConn ~ 1700 2750
Wire Wire Line
	8450 1600 8800 1600
Wire Wire Line
	8450 1900 8800 1900
Connection ~ 8800 1600
Wire Wire Line
	8800 1600 9250 1600
Wire Wire Line
	8800 1950 8800 1900
Connection ~ 8800 1900
Wire Wire Line
	8800 1900 9250 1900
Text Label 850  2950 2    50   ~ 0
ROMDIS
NoConn ~ 1700 2950
$Comp
L power:GND #PWR017
U 1 1 60368448
P 9450 1250
F 0 "#PWR017" H 9450 1000 50  0001 C CNN
F 1 "GND" H 9455 1077 50  0000 C CNN
F 2 "" H 9450 1250 50  0001 C CNN
F 3 "" H 9450 1250 50  0001 C CNN
	1    9450 1250
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR03
U 1 1 60368469
P 2050 850
F 0 "#PWR03" H 2050 600 50  0001 C CNN
F 1 "GND" H 2055 677 50  0000 C CNN
F 2 "" H 2050 850 50  0001 C CNN
F 3 "" H 2050 850 50  0001 C CNN
	1    2050 850 
	1    0    0    -1  
$EndComp
Wire Wire Line
	1550 850  2050 850 
$Comp
L 2021-02-23_17-07-18:M48T35Y-70MH1F U4
U 1 1 6036E291
P 3550 2900
F 0 "U4" H 4350 3387 60  0000 C CNN
F 1 "M48T35Y-70MH1F" H 4350 3281 60  0000 C CNN
F 2 "NVRAM:M48T35Y-70MH1F" H 4350 3240 60  0001 C CNN
F 3 "" H 3550 2900 60  0000 C CNN
	1    3550 2900
	1    0    0    -1  
$EndComp
$Comp
L 2021-02-23_17-07-18:M48T35Y-70MH1F U4
U 2 1 6036E30A
P 7850 950
F 0 "U4" H 8650 1337 60  0000 C CNN
F 1 "M48T35Y-70MH1F" H 8650 1231 60  0000 C CNN
F 2 "NVRAM:M48T35Y-70MH1F" H 8650 1290 60  0001 C CNN
F 3 "" H 7850 950 60  0000 C CNN
	2    7850 950 
	1    0    0    -1  
$EndComp
Text Label 5150 3000 0    50   ~ 0
D0
Text Label 5150 3100 0    50   ~ 0
D1
Text Label 5150 3200 0    50   ~ 0
D2
Text Label 5150 3300 0    50   ~ 0
D3
Text Label 5150 3400 0    50   ~ 0
D4
Text Label 5150 3500 0    50   ~ 0
D5
Text Label 5150 3600 0    50   ~ 0
D6
Text Label 5150 3700 0    50   ~ 0
D7
Text Label 3450 3800 0    50   ~ 0
A0
Text Label 3450 3700 0    50   ~ 0
A1
Text Label 3450 3600 0    50   ~ 0
A2
Text Label 3450 3500 0    50   ~ 0
A3
Text Label 3450 3400 0    50   ~ 0
A4
Text Label 3450 3300 0    50   ~ 0
A5
Text Label 3450 3200 0    50   ~ 0
A6
Text Label 3450 3100 0    50   ~ 0
A7
Text Label 3450 4200 0    50   ~ 0
A8
Text Label 3450 4100 0    50   ~ 0
A9
Text Label 3400 3900 0    50   ~ 0
A10
Text Label 3400 4000 0    50   ~ 0
A11
Text Label 3400 3000 0    50   ~ 0
A12
Text Label 650  4150 0    50   ~ 0
A13
Text Label 650  4550 0    50   ~ 0
A14
Text Label 650  3800 0    50   ~ 0
A15
Wire Wire Line
	3400 3000 3550 3000
Wire Wire Line
	3450 3100 3550 3100
Wire Wire Line
	3450 3200 3550 3200
Wire Wire Line
	3450 3300 3550 3300
Wire Wire Line
	3450 3400 3550 3400
Wire Wire Line
	3450 3500 3550 3500
Wire Wire Line
	3450 3600 3550 3600
Wire Wire Line
	3450 3700 3550 3700
Wire Wire Line
	3450 3800 3550 3800
Wire Wire Line
	3400 3900 3550 3900
Wire Wire Line
	3400 4000 3550 4000
Wire Wire Line
	3450 4100 3550 4100
Wire Wire Line
	3450 4200 3550 4200
Text GLabel 1700 2350 2    60   Output ~ 0
RD
Text GLabel 3500 4500 0    60   Output ~ 0
RD
Text GLabel 3500 4600 0    60   Output ~ 0
WR
Wire Wire Line
	3500 4500 3550 4500
Wire Wire Line
	3500 4600 3550 4600
$Comp
L 74xx:74HC86 U1
U 1 1 6037F6C9
P 3150 4850
F 0 "U1" H 3150 4850 50  0000 C CNN
F 1 "74HC86" H 3150 4650 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 3150 4850 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC86" H 3150 4850 50  0001 C CNN
	1    3150 4850
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HC86 U1
U 2 1 6037F735
P 1100 3900
F 0 "U1" H 1100 3900 50  0000 C CNN
F 1 "74HC86" H 1100 4150 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1100 3900 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC86" H 1100 3900 50  0001 C CNN
	2    1100 3900
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HC86 U1
U 3 1 6037F77C
P 1100 4650
F 0 "U1" H 1100 4650 50  0000 C CNN
F 1 "74HC86" H 1100 5650 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1100 4650 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC86" H 1100 4650 50  0001 C CNN
	3    1100 4650
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HC86 U1
U 4 1 6037F7D3
P 1100 4250
F 0 "U1" H 1100 4250 50  0000 C CNN
F 1 "74HC86" H 1100 4850 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1100 4250 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC86" H 1100 4250 50  0001 C CNN
	4    1100 4250
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS138 U2
U 1 1 6037FC84
P 2200 4450
F 0 "U2" H 2300 5100 50  0000 C CNN
F 1 "74LS138" H 2400 4950 50  0000 C CNN
F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 2200 4450 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS138" H 2200 4450 50  0001 C CNN
	1    2200 4450
	1    0    0    -1  
$EndComp
Text Label 5850 1000 0    50   ~ 0
D0
Text Label 5850 1100 0    50   ~ 0
D1
Text Label 5850 1200 0    50   ~ 0
D2
Text Label 5850 1300 0    50   ~ 0
D3
Text Label 5850 1700 0    50   ~ 0
D4
Text Label 5850 1600 0    50   ~ 0
D5
Text Label 5850 1500 0    50   ~ 0
D6
Text Label 5850 1400 0    50   ~ 0
D7
Wire Wire Line
	5850 1000 5950 1000
Wire Wire Line
	5850 1100 5950 1100
Wire Wire Line
	5850 1200 5950 1200
Wire Wire Line
	5850 1300 5950 1300
Wire Wire Line
	5850 1400 5950 1400
Wire Wire Line
	5850 1500 5950 1500
Wire Wire Line
	5850 1600 5950 1600
Wire Wire Line
	5850 1700 5950 1700
Text Label 6950 1700 0    50   ~ 0
MAP0
Text Label 6950 1600 0    50   ~ 0
MAP1
Text Label 6950 1500 0    50   ~ 0
MAP2
Text Label 6950 1400 0    50   ~ 0
MAP3
Text Label 3350 4300 0    50   ~ 0
SEL0
Text Label 6950 1100 0    50   ~ 0
SEL1
Text Label 6950 1200 0    50   ~ 0
SEL2
Text Label 6950 1300 0    50   ~ 0
SEL3
Text Label 2950 2900 2    50   ~ 0
SEL1
Wire Wire Line
	3350 4300 3550 4300
$Comp
L Device:Jumper JP1
U 1 1 60389732
P 3250 2900
F 0 "JP1" H 3250 3164 50  0000 C CNN
F 1 "Jumper" H 3250 3073 50  0000 C CNN
F 2 "Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm" H 3250 2900 50  0001 C CNN
F 3 "~" H 3250 2900 50  0001 C CNN
	1    3250 2900
	1    0    0    -1  
$EndComp
Text Label 600  4000 0    50   ~ 0
MAP3
Text Label 600  4750 0    50   ~ 0
MAP2
Text Label 600  4350 0    50   ~ 0
MAP1
Wire Wire Line
	650  3800 800  3800
Wire Wire Line
	600  4000 800  4000
Wire Wire Line
	650  4150 800  4150
Wire Wire Line
	600  4350 800  4350
Wire Wire Line
	650  4550 800  4550
Wire Wire Line
	600  4750 800  4750
Wire Wire Line
	1400 3900 1700 3900
Wire Wire Line
	1700 3900 1700 4150
Wire Wire Line
	1400 4250 1700 4250
Wire Wire Line
	1400 4650 1400 4350
Wire Wire Line
	1400 4350 1700 4350
Text GLabel 1250 4900 0    60   Output ~ 0
MREQ
Wire Wire Line
	1700 4900 1700 4850
Wire Wire Line
	1250 4900 1700 4900
Text Label 6950 1000 0    50   ~ 0
SEL0
Text Label 1500 4750 0    50   ~ 0
SEL2
Text Label 1450 4650 0    50   ~ 0
SEL3
Wire Wire Line
	1500 4750 1700 4750
Wire Wire Line
	1450 4650 1700 4650
$Comp
L 74xx:74LS30 U3
U 1 1 603D2AC1
P 2800 1550
F 0 "U3" H 2800 1550 50  0000 C CNN
F 1 "74LS30" H 2800 1350 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 2800 1550 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS30" H 2800 1550 50  0001 C CNN
	1    2800 1550
	1    0    0    -1  
$EndComp
Text Label 2350 1250 0    50   ~ 0
A9
Text Label 2350 1350 0    50   ~ 0
A10
Text Label 2350 1450 0    50   ~ 0
A11
Text Label 2350 1550 0    50   ~ 0
A12
Text Label 2350 1950 0    50   ~ 0
A13
Text Label 2350 1850 0    50   ~ 0
A14
Text Label 2350 1650 0    50   ~ 0
A15
Text Label 2350 1750 0    50   ~ 0
A7
$Comp
L 74xx:74LS27 U5
U 3 1 603D2D3C
P 3650 1100
F 0 "U5" H 3650 1100 50  0000 C CNN
F 1 "74LS27" H 3650 500 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 3650 1100 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS27" H 3650 1100 50  0001 C CNN
	3    3650 1100
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS27 U5
U 2 1 603D2DC2
P 3650 1450
F 0 "U5" H 3650 1450 50  0000 C CNN
F 1 "74LS27" H 3650 1200 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 3650 1450 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS27" H 3650 1450 50  0001 C CNN
	2    3650 1450
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS27 U5
U 1 1 603D2E05
P 3650 750
F 0 "U5" H 3650 750 50  0000 C CNN
F 1 "74LS27" H 3650 -200 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 3650 750 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS27" H 3650 750 50  0001 C CNN
	1    3650 750 
	1    0    0    -1  
$EndComp
Wire Wire Line
	3100 1550 3350 1550
Text Label 4200 1600 0    50   ~ 0
A8
Text Label 3200 750  0    50   ~ 0
A2
Text Label 3200 650  0    50   ~ 0
A3
Text Label 3200 1200 0    50   ~ 0
A4
Text Label 3200 1100 0    50   ~ 0
A5
Text Label 4200 1700 0    50   ~ 0
A6
Text Label 3200 850  0    50   ~ 0
A0
Text GLabel 3250 1450 0    60   Output ~ 0
IORQ
Wire Wire Line
	3250 1350 3350 1350
Wire Wire Line
	3200 650  3350 650 
Wire Wire Line
	3200 750  3350 750 
Wire Wire Line
	3200 850  3350 850 
Wire Wire Line
	3200 1000 3350 1000
Wire Wire Line
	3200 1100 3350 1100
Wire Wire Line
	3200 1200 3350 1200
Text Label 3850 5050 0    50   ~ 0
ROMDIS
Text Label 3850 5350 0    50   ~ 0
RAMDIS
$Comp
L power:GND #PWR09
U 1 1 6040C934
P 6200 2300
F 0 "#PWR09" H 6200 2050 50  0001 C CNN
F 1 "GND" H 6205 2127 50  0000 C CNN
F 2 "" H 6200 2300 50  0001 C CNN
F 3 "" H 6200 2300 50  0001 C CNN
	1    6200 2300
	1    0    0    -1  
$EndComp
Wire Wire Line
	6200 2300 6450 2300
$Comp
L power:VCC #PWR010
U 1 1 6040C96B
P 6450 700
F 0 "#PWR010" H 6450 800 30  0001 C CNN
F 1 "VCC" H 6450 800 30  0000 C CNN
F 2 "" H 6450 700 50  0001 C CNN
F 3 "" H 6450 700 50  0001 C CNN
	1    6450 700 
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR05
U 1 1 6040CA13
P 2200 5150
F 0 "#PWR05" H 2200 4900 50  0001 C CNN
F 1 "GND" H 2205 4977 50  0000 C CNN
F 2 "" H 2200 5150 50  0001 C CNN
F 3 "" H 2200 5150 50  0001 C CNN
	1    2200 5150
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR04
U 1 1 6040CA48
P 2200 3850
F 0 "#PWR04" H 2200 3950 30  0001 C CNN
F 1 "VCC" H 2200 3950 30  0000 C CNN
F 2 "" H 2200 3850 50  0001 C CNN
F 3 "" H 2200 3850 50  0001 C CNN
	1    2200 3850
	1    0    0    -1  
$EndComp
Wire Wire Line
	2350 1250 2500 1250
Wire Wire Line
	2350 1350 2500 1350
Wire Wire Line
	2350 1450 2500 1450
Wire Wire Line
	2350 1550 2500 1550
Wire Wire Line
	2350 1650 2500 1650
Wire Wire Line
	2350 1750 2500 1750
Wire Wire Line
	2350 1850 2500 1850
Wire Wire Line
	2350 1950 2500 1950
Text Label 2850 4150 0    50   ~ 0
RAMSEL
Wire Wire Line
	2700 4150 2850 4150
Text Label 5150 2800 0    50   ~ 0
RAMSEL
Wire Wire Line
	5950 1900 5650 1900
$Comp
L power:VCC #PWR011
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