EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr USLedger 17000 11000
encoding utf-8
Sheet 1 1
Title "Apple II I/O RPi"
Date "2021-03-08"
Rev "1.0"
Comp "Terence J. Boldt"
Comment1 "Fourth Prototype"
Comment2 "Provides storage and network for the Apple ]["
Comment3 "Raspberry Pi Zero W as a daughter board"
Comment4 "Expansion card for Apple ][ computers"
$EndDescr
$Comp
L Connector_Generic:Conn_02x25_Counter_Clockwise J0
U 1 1 5FA0A8C3
P 1750 2800
F 0 "J0" H 1800 4217 50  0000 C CNN
F 1 "Apple II Expansion Bus" H 1800 4126 50  0000 C CNN
F 2 "Apple2:Apple II Expansion Edge Connector" H 1750 2800 50  0001 C CNN
F 3 "~" H 1750 2800 50  0001 C CNN
	1    1750 2800
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS245 U0
U 1 1 5FA15F43
P 3600 2200
F 0 "U0" H 3600 3181 50  0000 C CNN
F 1 "74LS245" H 3600 3090 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 3600 2200 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 3600 2200 50  0001 C CNN
	1    3600 2200
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS245 U4
U 1 1 5FA19168
P 7850 2200
F 0 "U4" H 7850 3181 50  0000 C CNN
F 1 "74LVC245" H 7850 3090 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 7850 2200 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 7850 2200 50  0001 C CNN
	1    7850 2200
	1    0    0    -1  
$EndComp
$Comp
L Connector:Raspberry_Pi_2_3 J1
U 1 1 5FA19C2C
P 11800 2650
F 0 "J1" H 11800 4131 50  0000 C CNN
F 1 "Raspberry_Pi_2_3" H 11800 4040 50  0000 C CNN
F 2 "Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical" H 11800 2650 50  0001 C CNN
F 3 "https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3bplus_1p0_reduced.pdf" H 11800 2650 50  0001 C CNN
	1    11800 2650
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS374 U5
U 1 1 5FA1EB22
P 7850 4200
F 0 "U5" H 7850 5181 50  0000 C CNN
F 1 "74LVC374" H 7850 5090 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 7850 4200 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS374" H 7850 4200 50  0001 C CNN
	1    7850 4200
	1    0    0    -1  
$EndComp
Wire Wire Line
	3100 1700 2050 1700
Wire Wire Line
	3100 1800 2050 1800
Wire Wire Line
	3100 1900 2050 1900
Wire Wire Line
	2050 2000 3100 2000
Wire Wire Line
	3100 2100 2050 2100
Wire Wire Line
	2050 2200 3100 2200
Wire Wire Line
	3100 2300 2050 2300
Wire Wire Line
	2050 2400 3100 2400
Wire Wire Line
	7350 1900 6750 1900
Wire Wire Line
	7350 2200 6600 2200
Wire Wire Line
	7350 2400 6500 2400
Wire Wire Line
	6850 1700 6850 3700
Wire Wire Line
	6850 3700 7350 3700
Connection ~ 6850 1700
Wire Wire Line
	6850 1700 7350 1700
Wire Wire Line
	6800 1800 6800 3800
Wire Wire Line
	6800 3800 7350 3800
Connection ~ 6800 1800
Wire Wire Line
	6800 1800 7350 1800
Wire Wire Line
	6750 1900 6750 3900
Wire Wire Line
	6750 3900 7350 3900
Connection ~ 6750 1900
Wire Wire Line
	6700 2000 6700 4000
Wire Wire Line
	6700 4000 7350 4000
Connection ~ 6700 2000
Wire Wire Line
	6700 2000 7350 2000
Wire Wire Line
	6650 2100 6650 4100
Wire Wire Line
	6650 4100 7350 4100
Connection ~ 6650 2100
Wire Wire Line
	6650 2100 7350 2100
Wire Wire Line
	6600 2200 6600 4200
Wire Wire Line
	6600 4200 7350 4200
Connection ~ 6600 2200
Wire Wire Line
	6550 2300 6550 4300
Wire Wire Line
	6550 4300 7350 4300
Connection ~ 6550 2300
Wire Wire Line
	6550 2300 7350 2300
Wire Wire Line
	6500 2400 6500 4400
Wire Wire Line
	6500 4400 7350 4400
Connection ~ 6500 2400
Wire Wire Line
	5150 8150 5100 8150
Wire Wire Line
	5200 8250 5100 8250
Wire Wire Line
	5250 8350 5100 8350
Wire Wire Line
	5100 8450 5300 8450
Wire Wire Line
	5350 8550 5100 8550
Wire Wire Line
	5100 8650 5400 8650
Wire Wire Line
	5450 8750 5100 8750
Wire Wire Line
	4300 8050 1400 8050
Wire Wire Line
	1400 1700 1550 1700
Wire Wire Line
	1550 1800 1350 1800
Wire Wire Line
	1350 1800 1350 5150
Wire Wire Line
	1350 8150 4300 8150
Wire Wire Line
	4300 8250 1300 8250
Wire Wire Line
	1300 1900 1550 1900
Wire Wire Line
	1550 2000 1250 2000
Wire Wire Line
	1250 8350 4300 8350
Wire Wire Line
	1200 8450 4300 8450
Wire Wire Line
	4300 8550 1150 8550
Wire Wire Line
	1150 2200 1550 2200
Wire Wire Line
	1100 8650 4300 8650
Wire Wire Line
	4300 8750 1050 8750
Wire Wire Line
	1050 2400 1550 2400
Wire Wire Line
	4300 8850 1000 8850
Wire Wire Line
	1000 2500 1550 2500
Wire Wire Line
	1550 2600 950  2600
Wire Wire Line
	950  8950 4300 8950
Wire Wire Line
	4300 9050 900  9050
Wire Wire Line
	900  2700 1550 2700
Wire Wire Line
	1550 1600 1450 1600
Wire Wire Line
	1450 1600 1450 4200
Wire Wire Line
	4150 7850 4700 7850
Wire Wire Line
	1550 7850 2350 7850
Connection ~ 4150 7850
Wire Wire Line
	4150 1400 6150 1400
Wire Wire Line
	4150 1400 4150 2550
Wire Wire Line
	7050 5000 7850 5000
Wire Wire Line
	7050 5000 7050 4700
Wire Wire Line
	7050 3000 7850 3000
Wire Wire Line
	7350 2600 7050 2600
Wire Wire Line
	7050 2600 7050 3000
Connection ~ 7050 3000
Wire Wire Line
	7350 4700 7050 4700
Connection ~ 7050 4700
Wire Wire Line
	7050 4700 7050 3000
Wire Wire Line
	11700 1350 11600 1350
Connection ~ 11600 1350
Wire Wire Line
	7850 3000 8350 3000
Wire Wire Line
	9400 3000 9400 3950
Wire Wire Line
	9400 3950 11400 3950
Connection ~ 7850 3000
Wire Wire Line
	11400 3950 11500 3950
Connection ~ 11400 3950
Wire Wire Line
	11500 3950 11600 3950
Connection ~ 11500 3950
Wire Wire Line
	11600 3950 11700 3950
Connection ~ 11600 3950
Wire Wire Line
	11700 3950 11800 3950
Connection ~ 11700 3950
Wire Wire Line
	11800 3950 11900 3950
Connection ~ 11800 3950
Wire Wire Line
	11900 3950 12000 3950
Connection ~ 11900 3950
Wire Wire Line
	12000 3950 12100 3950
Connection ~ 12000 3950
Wire Wire Line
	12600 2350 12850 2350
Wire Wire Line
	12850 2350 12850 1200
Wire Wire Line
	12850 1200 8350 1200
Wire Wire Line
	8350 1200 8350 1700
Wire Wire Line
	9450 2150 9450 1800
Wire Wire Line
	11000 3350 9500 3350
Wire Wire Line
	9500 3350 9500 1900
Wire Wire Line
	9500 1900 8350 1900
Wire Wire Line
	11000 2850 9550 2850
Wire Wire Line
	9550 2850 9550 2000
Wire Wire Line
	9550 2000 8350 2000
Wire Wire Line
	11000 2150 9450 2150
Wire Wire Line
	12600 3050 12900 3050
Wire Wire Line
	12900 3050 12900 1000
Wire Wire Line
	12900 1000 8500 1000
Wire Wire Line
	8500 1000 8500 2100
Wire Wire Line
	8500 2100 8350 2100
Wire Wire Line
	12600 2950 12950 2950
Wire Wire Line
	12950 2950 12950 950 
Wire Wire Line
	12950 950  8550 950 
Wire Wire Line
	8550 950  8550 2200
Wire Wire Line
	8550 2200 8350 2200
Wire Wire Line
	12600 3150 13000 3150
Wire Wire Line
	13000 3150 13000 900 
Wire Wire Line
	13000 900  8600 900 
Wire Wire Line
	8600 900  8600 2300
Wire Wire Line
	8600 2300 8350 2300
Wire Wire Line
	12600 2450 13050 2450
Wire Wire Line
	13050 2450 13050 850 
Wire Wire Line
	13050 850  8650 850 
Wire Wire Line
	8650 850  8650 2400
Wire Wire Line
	8650 2400 8350 2400
Wire Wire Line
	12600 2550 13050 2550
Wire Wire Line
	13050 2550 13050 4100
Wire Wire Line
	13050 4100 9250 4100
Wire Wire Line
	9250 4100 9250 3700
Wire Wire Line
	9200 3800 9200 4150
Wire Wire Line
	9200 4150 12750 4150
Wire Wire Line
	12750 4150 12750 3450
Wire Wire Line
	12750 3450 12600 3450
Wire Wire Line
	9600 2450 9600 3900
Wire Wire Line
	9600 2450 11000 2450
Wire Wire Line
	11000 3250 9650 3250
Wire Wire Line
	9650 3250 9650 4000
Wire Wire Line
	9150 2650 11000 2650
Wire Wire Line
	9150 2650 9150 4100
Wire Wire Line
	11000 2550 9100 2550
Wire Wire Line
	9100 2550 9100 4200
Wire Wire Line
	11000 2050 9050 2050
Wire Wire Line
	9050 2050 9050 4300
Wire Wire Line
	12600 3350 12800 3350
Wire Wire Line
	12800 3350 12800 4400
Wire Wire Line
	7850 3400 8400 3400
Connection ~ 7850 5000
Wire Wire Line
	1550 3300 850  3300
Wire Wire Line
	850  3300 850  4400
Wire Wire Line
	3000 2600 3100 2600
Text Notes 2450 2650 0    50   ~ 0
Direction is\nR/W Inverted
Wire Wire Line
	1400 4650 3250 4650
Wire Wire Line
	4650 2700 5750 2700
Wire Wire Line
	1400 4650 1400 1700
$Comp
L 74xx:74LS32 U3
U 1 1 5FB50A31
P 6050 2800
F 0 "U3" H 6050 3125 50  0000 C CNN
F 1 "74LS32" H 6050 3034 50  0000 C CNN
F 2 "Apple2:74LS32" H 6050 2800 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 6050 2800 50  0001 C CNN
	1    6050 2800
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 2500 2350 2500
Wire Wire Line
	2350 3200 5750 3200
Wire Wire Line
	5750 3200 5750 2900
Wire Wire Line
	7350 2800 7350 2700
$Comp
L 74xx:74LS32 U3
U 2 1 5FB9C73F
P 3550 4550
F 0 "U3" H 3550 4875 50  0000 C CNN
F 1 "74LS32" H 3550 4784 50  0000 C CNN
F 2 "Apple2:74LS32" H 3550 4550 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 3550 4550 50  0001 C CNN
	2    3550 4550
	1    0    0    -1  
$EndComp
Wire Wire Line
	3000 4400 3250 4400
Wire Wire Line
	3250 4400 3250 4450
Connection ~ 3000 4400
Wire Wire Line
	3850 4550 4650 4550
Wire Wire Line
	4650 4550 4650 2700
$Comp
L 74xx:74LS32 U3
U 3 1 5FBF09C5
P 6150 4600
F 0 "U3" H 6150 4925 50  0000 C CNN
F 1 "74LS32" H 6150 4834 50  0000 C CNN
F 2 "Apple2:74LS32" H 6150 4600 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 6150 4600 50  0001 C CNN
	3    6150 4600
	1    0    0    -1  
$EndComp
Wire Wire Line
	5750 4500 5850 4500
Wire Wire Line
	5750 3200 5750 4500
Connection ~ 5750 3200
$Comp
L 74xx:74LS32 U3
U 4 1 5FC54438
P 3550 5050
F 0 "U3" H 3550 5375 50  0000 C CNN
F 1 "74LS32" H 3550 5284 50  0000 C CNN
F 2 "Apple2:74LS32" H 3550 5050 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 3550 5050 50  0001 C CNN
	4    3550 5050
	1    0    0    -1  
$EndComp
Wire Wire Line
	5850 4700 3850 4700
Wire Wire Line
	3850 4700 3850 5050
Wire Wire Line
	3250 5150 1350 5150
Text Notes 6350 5050 0    50   ~ 0
Latch Clock on\nR/W low\nA1 low\nDEV_SELECT low
Wire Wire Line
	3150 4950 3200 4950
Wire Wire Line
	3000 4400 3000 4750
Wire Wire Line
	3000 4750 2550 4750
Wire Wire Line
	2550 4750 2550 4850
Wire Wire Line
	850  4400 2400 4400
Wire Wire Line
	2350 2500 2350 3200
$Comp
L 74xx:74LS00 U2
U 1 1 5FD4E618
P 2600 3600
F 0 "U2" H 2600 3925 50  0000 C CNN
F 1 "74LS00" H 2600 3834 50  0000 C CNN
F 2 "Apple2:74LS00" H 2600 3600 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 2600 3600 50  0001 C CNN
	1    2600 3600
	1    0    0    -1  
$EndComp
Wire Wire Line
	2350 3200 2300 3200
Wire Wire Line
	2300 3200 2300 3500
Connection ~ 2350 3200
$Comp
L 74xx:74LS00 U2
U 2 1 5FD74B7A
P 3400 3600
F 0 "U2" H 3400 3925 50  0000 C CNN
F 1 "74LS00" H 3400 3834 50  0000 C CNN
F 2 "Apple2:74LS00" H 3400 3600 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 3400 3600 50  0001 C CNN
	2    3400 3600
	1    0    0    -1  
$EndComp
Wire Wire Line
	3900 4000 3900 3000
Wire Wire Line
	3900 3000 3600 3000
Wire Wire Line
	2050 4000 3900 4000
Wire Wire Line
	2900 3600 3100 3600
Wire Wire Line
	3100 3600 3100 3500
Wire Wire Line
	3100 3700 3100 3600
Connection ~ 3100 3600
Wire Wire Line
	3700 3600 3700 3050
Wire Wire Line
	3700 3050 3100 3050
Wire Wire Line
	3100 3050 3100 2700
Wire Wire Line
	1450 4200 2300 4200
Wire Wire Line
	2300 4200 2300 3700
$Comp
L 74xx:74LS00 U2
U 3 1 5FE27921
P 2850 4950
F 0 "U2" H 2850 5275 50  0000 C CNN
F 1 "74LS00" H 2850 5184 50  0000 C CNN
F 2 "Apple2:74LS00" H 2850 4950 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 2850 4950 50  0001 C CNN
	3    2850 4950
	1    0    0    -1  
$EndComp
Connection ~ 2550 4850
Wire Wire Line
	2550 4850 2550 5050
$Comp
L 74xx:74LS00 U2
U 4 1 5FE48B46
P 2700 4400
F 0 "U2" H 2700 4725 50  0000 C CNN
F 1 "74LS00" H 2700 4634 50  0000 C CNN
F 2 "Apple2:74LS00" H 2700 4400 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 2700 4400 50  0001 C CNN
	4    2700 4400
	1    0    0    -1  
$EndComp
Wire Wire Line
	2400 4300 2400 4400
Wire Wire Line
	2400 4400 2400 4500
Connection ~ 2400 4400
Text Notes 7250 3100 0    50   ~ 0
Enable on\nR/W high\nA0 low\nDEV_SELECT low
Text Notes 3700 3700 0    50   ~ 0
Enable on either\nDEV_SELECT low\nIO_SELECT low
$Comp
L 74xx:74LS00 U2
U 5 1 5FED8457
P 6000 8300
F 0 "U2" H 6230 8346 50  0000 L CNN
F 1 "74LS00" H 6230 8255 50  0000 L CNN
F 2 "Apple2:74LS00" H 6000 8300 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 6000 8300 50  0001 C CNN
	5    6000 8300
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS32 U3
U 5 1 5FEDB516
P 6750 8300
F 0 "U3" H 6980 8346 50  0000 L CNN
F 1 "74LS32" H 6980 8255 50  0000 L CNN
F 2 "Apple2:74LS32" H 6750 8300 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 6750 8300 50  0001 C CNN
	5    6750 8300
	1    0    0    -1  
$EndComp
Wire Wire Line
	6750 8800 7050 8800
Connection ~ 7050 8800
Wire Wire Line
	6750 8800 6450 8800
Connection ~ 6750 8800
Wire Wire Line
	6750 7800 6450 7800
Wire Wire Line
	4700 7800 4700 7850
Connection ~ 6000 7800
Wire Wire Line
	1550 3900 1500 3900
Wire Wire Line
	1500 3900 1500 4100
Wire Wire Line
	1500 4100 2150 4100
Wire Wire Line
	2150 4100 2150 3900
Wire Wire Line
	2150 3900 2050 3900
Wire Wire Line
	2050 3800 2200 3800
Wire Wire Line
	2200 3800 2200 4150
Wire Wire Line
	2200 4150 800  4150
Wire Wire Line
	800  4150 800  3800
Wire Wire Line
	800  3800 1550 3800
$Comp
L Device:C C3
U 1 1 5FB81404
P 5650 8650
F 0 "C3" H 5765 8696 50  0000 L CNN
F 1 "C" H 5765 8605 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 5688 8500 50  0001 C CNN
F 3 "~" H 5650 8650 50  0001 C CNN
	1    5650 8650
	1    0    0    -1  
$EndComp
$Comp
L Device:C C4
U 1 1 5FB82906
P 6450 8650
F 0 "C4" H 6565 8696 50  0000 L CNN
F 1 "C" H 6565 8605 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 6488 8500 50  0001 C CNN
F 3 "~" H 6450 8650 50  0001 C CNN
	1    6450 8650
	1    0    0    -1  
$EndComp
$Comp
L Device:C C2
U 1 1 5FB849D8
P 5200 9550
F 0 "C2" H 5315 9596 50  0000 L CNN
F 1 "C" H 5315 9505 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 5238 9400 50  0001 C CNN
F 3 "~" H 5200 9550 50  0001 C CNN
	1    5200 9550
	1    0    0    -1  
$EndComp
$Comp
L Device:C C1
U 1 1 5FB85911
P 4050 2700
F 0 "C1" H 4165 2746 50  0000 L CNN
F 1 "C" H 4165 2655 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 4088 2550 50  0001 C CNN
F 3 "~" H 4050 2700 50  0001 C CNN
	1    4050 2700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C5
U 1 1 5FB8694D
P 8350 2650
F 0 "C5" H 8465 2696 50  0000 L CNN
F 1 "C" H 8465 2605 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 8388 2500 50  0001 C CNN
F 3 "~" H 8350 2650 50  0001 C CNN
	1    8350 2650
	1    0    0    -1  
$EndComp
$Comp
L Device:C C6
U 1 1 5FB87862
P 8350 4750
F 0 "C6" H 8465 4796 50  0000 L CNN
F 1 "C" H 8465 4705 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 8388 4600 50  0001 C CNN
F 3 "~" H 8350 4750 50  0001 C CNN
	1    8350 4750
	1    0    0    -1  
$EndComp
Connection ~ 8350 3000
Wire Wire Line
	8350 3000 9400 3000
Wire Wire Line
	8350 2800 8350 3000
Wire Wire Line
	9450 1800 8350 1800
Wire Wire Line
	8450 1350 8450 2500
Wire Wire Line
	8450 2500 8350 2500
Wire Wire Line
	8400 3400 8400 4500
Wire Wire Line
	8400 4500 8350 4500
Wire Wire Line
	8350 4500 8350 4600
Wire Wire Line
	8350 5000 7850 5000
Wire Wire Line
	8350 4900 8350 5000
Connection ~ 6450 8800
Wire Wire Line
	6450 8500 6450 7800
Connection ~ 6450 7800
Wire Wire Line
	6450 7800 6000 7800
Wire Wire Line
	6000 8800 5650 8800
Connection ~ 6000 8800
Wire Wire Line
	5650 8500 5650 7800
Connection ~ 5650 7800
Wire Wire Line
	5650 7800 5500 7800
Wire Wire Line
	5200 9400 5200 8850
Wire Wire Line
	5200 8850 5500 8850
Wire Wire Line
	5500 8850 5500 7800
Connection ~ 5500 7800
Wire Wire Line
	5500 7800 4700 7800
Wire Wire Line
	3900 3000 4050 3000
Wire Wire Line
	4050 3000 4050 2850
Connection ~ 3900 3000
Wire Wire Line
	4050 2550 4150 2550
Wire Wire Line
	8350 3700 9250 3700
Wire Wire Line
	8350 3800 9200 3800
Wire Wire Line
	8350 3900 9600 3900
Wire Wire Line
	8350 4000 9650 4000
Wire Wire Line
	8350 4100 9150 4100
Wire Wire Line
	8350 4200 9100 4200
Wire Wire Line
	8350 4300 9050 4300
Wire Wire Line
	8350 4400 12800 4400
Wire Wire Line
	6450 4600 7350 4600
Wire Wire Line
	6350 2800 7350 2800
Wire Wire Line
	6150 1400 6150 1100
Wire Wire Line
	6150 1100 11600 1100
Wire Wire Line
	11600 1100 11600 1350
Wire Wire Line
	12000 1350 11900 1350
Wire Wire Line
	11900 1350 11900 1050
Wire Wire Line
	11900 1050 7850 1050
Wire Wire Line
	7850 1050 7850 1350
Connection ~ 11900 1350
Wire Wire Line
	7850 1350 8450 1350
Connection ~ 7850 1350
Wire Wire Line
	7850 1350 7850 1400
Wire Wire Line
	8400 3400 8850 3400
Wire Wire Line
	8850 3400 8850 1350
Wire Wire Line
	8850 1350 8450 1350
Connection ~ 8400 3400
Connection ~ 8450 1350
Text Notes 2150 4500 0    50   ~ 0
R/W
Text Notes 2800 3250 0    50   ~ 0
Device Select\n($C08+n0 - $C08+nF peripheral)
Text Notes 2300 3950 0    50   ~ 0
I/O Select\n($Cn00 - $CnFF Firmware)
Text Notes 3200 4750 0    50   ~ 0
A0
Text Notes 3200 5250 0    50   ~ 0
A1
Text Notes 2900 4300 0    50   ~ 0
Inverted R/W
Text Notes 3050 5100 0    50   ~ 0
R/W
Text Notes 4650 4950 0    50   ~ 0
Low on\nA1 low\nR/W low
Text Notes 4700 2950 0    50   ~ 0
Low on\nR/W high\nA0 low\n
Wire Wire Line
	4150 1400 3600 1400
Connection ~ 4150 1400
Wire Wire Line
	3000 2600 3000 4400
Wire Wire Line
	7050 10100 5200 10100
Connection ~ 5200 10100
Wire Wire Line
	5200 10100 4700 10100
Wire Wire Line
	4700 10050 4700 10100
Connection ~ 4700 10100
Wire Wire Line
	7050 8800 7050 10100
Wire Wire Line
	5200 9700 5200 10100
Connection ~ 4700 7850
$Comp
L Memory_EPROM:27C256 U1
U 1 1 5FD87325
P 4700 8950
F 0 "U1" H 4700 10228 50  0000 C CNN
F 1 "27C256" H 4700 10137 50  0000 C CNN
F 2 "Package_DIP:DIP-28_W15.24mm_Socket" H 4700 8950 50  0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0014.pdf" H 4700 8950 50  0001 C CNN
	1    4700 8950
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 9650 4100 9750
Wire Wire Line
	4100 9750 4300 9750
$Comp
L 74xx:74LS245 U6
U 1 1 5FED6949
P 11050 5650
F 0 "U6" H 11050 6628 50  0000 C CNN
F 1 "74LVC245" H 11050 6537 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 11050 5650 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 11050 5650 50  0001 C CNN
	1    11050 5650
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS374 U7
U 1 1 5FED6A94
P 11050 7650
F 0 "U7" H 11050 8628 50  0000 C CNN
F 1 "74LVC374" H 11050 8537 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 11050 7650 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS374" H 11050 7650 50  0001 C CNN
	1    11050 7650
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 1700 5100 1700
Wire Wire Line
	4100 1800 5150 1800
Wire Wire Line
	4100 2000 5250 2000
Wire Wire Line
	4100 2100 5300 2100
Wire Wire Line
	4100 2300 5400 2300
Wire Wire Line
	4100 1900 5200 1900
Wire Wire Line
	4100 2200 5350 2200
Wire Wire Line
	4100 2400 5450 2400
Wire Wire Line
	1300 1900 1300 6450
Wire Wire Line
	1250 2000 1250 7000
Wire Wire Line
	1550 2100 1200 2100
Wire Wire Line
	1200 2100 1200 8450
Wire Wire Line
	1150 2200 1150 8550
Wire Wire Line
	1550 2300 1100 2300
Wire Wire Line
	1100 2300 1100 8650
Wire Wire Line
	1050 2400 1050 8750
Wire Wire Line
	1000 2500 1000 8850
Wire Wire Line
	950  2600 950  8950
Wire Wire Line
	900  2700 900  9050
Wire Wire Line
	2050 4000 2050 4300
Connection ~ 2050 4000
Wire Wire Line
	1550 4000 1550 7850
Wire Wire Line
	1450 4200 1450 9650
Connection ~ 1450 4200
Wire Wire Line
	1400 4650 1400 8050
Connection ~ 1400 4650
Wire Wire Line
	1350 5150 1350 8150
Connection ~ 1350 5150
Connection ~ 4150 2550
Wire Wire Line
	5100 1700 5100 5150
Connection ~ 5100 1700
Wire Wire Line
	5100 1700 6850 1700
Wire Wire Line
	5150 1800 5150 5250
Connection ~ 5150 1800
Wire Wire Line
	5150 1800 6800 1800
Wire Wire Line
	5200 1900 5200 5350
Connection ~ 5200 1900
Wire Wire Line
	5200 1900 6750 1900
Wire Wire Line
	5250 2000 5250 5450
Connection ~ 5250 2000
Wire Wire Line
	5250 2000 6700 2000
Wire Wire Line
	5300 2100 5300 5550
Connection ~ 5300 2100
Wire Wire Line
	5300 2100 6650 2100
Wire Wire Line
	5350 2200 5350 5650
Connection ~ 5350 2200
Wire Wire Line
	5350 2200 6600 2200
Wire Wire Line
	5400 2300 5400 5750
Connection ~ 5400 2300
Wire Wire Line
	5400 2300 6550 2300
Wire Wire Line
	5450 2400 5450 5850
Connection ~ 5450 2400
Wire Wire Line
	5450 2400 6500 2400
Wire Wire Line
	10550 5150 9950 5150
Connection ~ 5100 5150
Wire Wire Line
	10550 5250 9900 5250
Connection ~ 5150 5250
Wire Wire Line
	10550 5350 9850 5350
Connection ~ 5200 5350
Wire Wire Line
	10550 5450 9800 5450
Connection ~ 5250 5450
Wire Wire Line
	10550 5550 9750 5550
Connection ~ 5300 5550
Wire Wire Line
	10550 5650 9700 5650
Connection ~ 5350 5650
Wire Wire Line
	10550 5750 9650 5750
Connection ~ 5400 5750
Wire Wire Line
	10550 5850 9600 5850
Connection ~ 5450 5850
Wire Wire Line
	7050 5000 7050 6050
Connection ~ 7050 5000
Wire Wire Line
	11050 6450 10350 6450
Wire Wire Line
	11050 8450 10550 8450
Wire Wire Line
	8850 3400 10200 3400
Wire Wire Line
	10200 3400 10200 4850
Wire Wire Line
	10200 4850 11050 4850
Connection ~ 8850 3400
Wire Wire Line
	10200 4850 10200 6850
Wire Wire Line
	10200 6850 11050 6850
Connection ~ 10200 4850
Wire Wire Line
	10550 7150 9950 7150
Wire Wire Line
	9950 7150 9950 5150
Connection ~ 9950 5150
Wire Wire Line
	9950 5150 5100 5150
Wire Wire Line
	10550 7250 9900 7250
Wire Wire Line
	9900 7250 9900 5250
Connection ~ 9900 5250
Wire Wire Line
	9900 5250 5150 5250
Wire Wire Line
	9850 7350 9850 5350
Wire Wire Line
	9850 7350 10550 7350
Connection ~ 9850 5350
Wire Wire Line
	9850 5350 5200 5350
Wire Wire Line
	10550 7450 9800 7450
Wire Wire Line
	9800 7450 9800 5450
Connection ~ 9800 5450
Wire Wire Line
	9800 5450 5250 5450
Wire Wire Line
	10550 7550 9750 7550
Wire Wire Line
	9750 7550 9750 5550
Connection ~ 9750 5550
Wire Wire Line
	9750 5550 5300 5550
Wire Wire Line
	10550 7650 9700 7650
Wire Wire Line
	9700 7650 9700 5650
Connection ~ 9700 5650
Wire Wire Line
	9700 5650 5350 5650
Wire Wire Line
	10550 7750 9650 7750
Wire Wire Line
	9650 7750 9650 5750
Connection ~ 9650 5750
Wire Wire Line
	9650 5750 5400 5750
Wire Wire Line
	9600 7850 9600 5850
Wire Wire Line
	9600 7850 10550 7850
Connection ~ 9600 5850
Wire Wire Line
	9600 5850 5450 5850
Wire Wire Line
	10550 8150 10550 8450
Wire Wire Line
	10550 6050 10350 6050
Wire Wire Line
	10350 6050 10350 6450
Wire Wire Line
	2600 10150 2600 9150
Wire Wire Line
	2600 9150 4300 9150
Wire Wire Line
	2650 10200 2650 9250
Wire Wire Line
	2650 9250 4300 9250
Wire Wire Line
	2700 10250 2700 9350
Wire Wire Line
	2700 9350 4300 9350
Wire Wire Line
	2750 10300 2750 9450
Wire Wire Line
	2750 9450 4300 9450
Wire Wire Line
	10350 6050 7050 6050
Connection ~ 10350 6050
Connection ~ 7050 6050
Wire Wire Line
	5100 5150 5100 8050
Wire Wire Line
	5150 5250 5150 8150
Wire Wire Line
	5200 5350 5200 8250
Wire Wire Line
	5250 5450 5250 8350
Wire Wire Line
	5300 5550 5300 8450
Wire Wire Line
	5350 5650 5350 8550
Wire Wire Line
	5400 5750 5400 8650
Wire Wire Line
	5450 5850 5450 8750
Wire Wire Line
	11550 7550 11700 7550
Wire Wire Line
	11700 7550 11700 10150
Wire Wire Line
	2600 10150 11700 10150
Wire Wire Line
	11750 10200 11750 7650
Wire Wire Line
	11750 7650 11550 7650
Wire Wire Line
	2650 10200 11750 10200
Wire Wire Line
	11800 10250 11800 7750
Wire Wire Line
	11800 7750 11550 7750
Wire Wire Line
	2700 10250 7900 10250
Wire Wire Line
	11850 10300 11850 7850
Wire Wire Line
	11850 7850 11550 7850
Wire Wire Line
	2750 10300 9000 10300
Wire Wire Line
	11550 7150 12500 7150
Wire Wire Line
	12500 7150 12500 4200
Wire Wire Line
	12500 4200 10700 4200
Wire Wire Line
	10700 4200 10700 2950
Wire Wire Line
	10700 2950 11000 2950
Wire Wire Line
	11550 7250 12550 7250
Wire Wire Line
	12550 7250 12550 4250
Wire Wire Line
	12550 4250 10650 4250
Wire Wire Line
	10650 4250 10650 2250
Wire Wire Line
	10650 2250 11000 2250
Wire Wire Line
	11000 1850 10600 1850
Wire Wire Line
	10600 1850 10600 4300
Wire Wire Line
	10600 4300 12600 4300
Wire Wire Line
	12600 4300 12600 7350
Wire Wire Line
	12600 7350 11550 7350
Wire Wire Line
	11000 1750 10550 1750
Wire Wire Line
	10550 1750 10550 4350
Wire Wire Line
	10550 4350 12650 4350
Wire Wire Line
	12650 4350 12650 7450
Wire Wire Line
	12650 7450 11550 7450
Wire Wire Line
	12600 2750 13150 2750
Wire Wire Line
	12600 2850 13200 2850
Wire Wire Line
	11000 3150 10950 3150
Wire Wire Line
	10950 3150 10950 4550
Wire Wire Line
	10950 4550 11800 4550
Wire Wire Line
	10900 3050 10900 4600
Wire Wire Line
	10900 4600 11850 4600
Wire Wire Line
	10900 3050 11000 3050
Wire Wire Line
	11550 5850 11850 5850
Wire Wire Line
	11550 5750 11800 5750
Wire Wire Line
	4150 2550 4150 7850
$Comp
L Device:C C8
U 1 1 60A58951
P 12200 7800
F 0 "C8" H 12315 7846 50  0000 L CNN
F 1 "C" H 12315 7755 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 12238 7650 50  0001 C CNN
F 3 "~" H 12200 7800 50  0001 C CNN
	1    12200 7800
	1    0    0    -1  
$EndComp
$Comp
L Device:C C7
U 1 1 60A87587
P 12150 5750
F 0 "C7" H 12265 5796 50  0000 L CNN
F 1 "C" H 12265 5705 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 12188 5600 50  0001 C CNN
F 3 "~" H 12150 5750 50  0001 C CNN
	1    12150 5750
	1    0    0    -1  
$EndComp
Wire Wire Line
	11050 6850 12200 6850
Wire Wire Line
	12200 6850 12200 7650
Connection ~ 11050 6850
Wire Wire Line
	11050 8450 12200 8450
Wire Wire Line
	12200 8450 12200 7950
Connection ~ 11050 8450
Wire Wire Line
	12150 5900 12150 6450
Wire Wire Line
	12150 6450 11050 6450
Connection ~ 11050 6450
Wire Wire Line
	12150 5600 12150 4850
Wire Wire Line
	12150 4850 11050 4850
Connection ~ 11050 4850
Wire Wire Line
	11050 8800 11050 8450
Wire Wire Line
	7050 6050 7050 8800
$Comp
L 74xx:74LS32 U8
U 5 1 60BA60C0
P 7500 8300
F 0 "U8" H 7730 8346 50  0000 L CNN
F 1 "74LS32" H 7730 8255 50  0000 L CNN
F 2 "Apple2:74LS32" H 7500 8300 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 7500 8300 50  0001 C CNN
	5    7500 8300
	1    0    0    -1  
$EndComp
Connection ~ 7500 8800
Connection ~ 6750 7800
$Comp
L Device:C C9
U 1 1 60C3A67B
P 7150 8650
F 0 "C9" H 7265 8696 50  0000 L CNN
F 1 "C" H 7265 8605 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 7188 8500 50  0001 C CNN
F 3 "~" H 7150 8650 50  0001 C CNN
	1    7150 8650
	1    0    0    -1  
$EndComp
Connection ~ 7150 8800
Wire Wire Line
	7150 8800 7500 8800
Wire Wire Line
	7150 8500 7150 7800
Connection ~ 7150 7800
Wire Wire Line
	7150 7800 7500 7800
Text Notes 10000 6300 0    50   ~ 0
Enable on\nR/W high\nA2 low\nDEV_SELECT low
Text Notes 9850 8200 0    50   ~ 0
Latch Clock on\nR/W low\nA3 low\nDEV_SELECT low
$Comp
L 74xx:74LS32 U8
U 1 1 60D9A204
P 6550 6250
F 0 "U8" H 6550 6575 50  0000 C CNN
F 1 "74LS32" H 6550 6484 50  0000 C CNN
F 2 "Apple2:74LS32" H 6550 6250 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 6550 6250 50  0001 C CNN
	1    6550 6250
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS32 U8
U 2 1 60D9A31D
P 6550 6850
F 0 "U8" H 6550 7175 50  0000 C CNN
F 1 "74LS32" H 6550 7084 50  0000 C CNN
F 2 "Apple2:74LS32" H 6550 6850 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 6550 6850 50  0001 C CNN
	2    6550 6850
	1    0    0    -1  
$EndComp
Wire Wire Line
	6850 6250 6950 6250
Wire Wire Line
	6950 6250 6950 6150
Wire Wire Line
	6950 6150 10550 6150
Wire Wire Line
	6850 6850 9200 6850
Wire Wire Line
	9200 6850 9200 8050
Wire Wire Line
	9200 8050 10550 8050
Wire Wire Line
	5750 4500 5750 6150
Wire Wire Line
	5750 6150 6250 6150
Connection ~ 5750 4500
Wire Wire Line
	5750 6150 5750 6750
Wire Wire Line
	5750 6750 6250 6750
Connection ~ 5750 6150
Wire Wire Line
	7050 8800 7150 8800
Wire Wire Line
	6750 7800 7150 7800
Wire Wire Line
	5650 7800 6000 7800
Wire Wire Line
	6000 8800 6450 8800
Wire Wire Line
	7500 8800 11050 8800
$Comp
L 74xx:74LS32 U8
U 3 1 60F3F0CC
P 3500 6350
F 0 "U8" H 3500 6675 50  0000 C CNN
F 1 "74LS32" H 3500 6584 50  0000 C CNN
F 2 "Apple2:74LS32" H 3500 6350 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 3500 6350 50  0001 C CNN
	3    3500 6350
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS32 U8
U 4 1 60F3F167
P 3500 6900
F 0 "U8" H 3500 7225 50  0000 C CNN
F 1 "74LS32" H 3500 7134 50  0000 C CNN
F 2 "Apple2:74LS32" H 3500 6900 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 3500 6900 50  0001 C CNN
	4    3500 6900
	1    0    0    -1  
$EndComp
Wire Wire Line
	3200 6450 1300 6450
Connection ~ 1300 6450
Wire Wire Line
	1300 6450 1300 8250
Wire Wire Line
	3200 7000 1250 7000
Connection ~ 1250 7000
Wire Wire Line
	1250 7000 1250 8350
Wire Wire Line
	3200 4950 3200 5650
Wire Wire Line
	3200 5650 2700 5650
Wire Wire Line
	2700 5650 2700 6800
Wire Wire Line
	2700 6800 3200 6800
Connection ~ 3200 4950
Wire Wire Line
	3200 4950 3250 4950
Wire Wire Line
	2550 5050 2550 6250
Wire Wire Line
	2550 6250 3200 6250
Connection ~ 2550 5050
Wire Wire Line
	3800 6350 6250 6350
Wire Wire Line
	3800 6900 6250 6900
Wire Wire Line
	6250 6900 6250 6950
Text Notes 2700 6200 0    50   ~ 0
Inverted R/W
Text Notes 2900 6750 0    50   ~ 0
R/W
Text Notes 3000 7100 0    50   ~ 0
A3
Text Notes 3000 6550 0    50   ~ 0
A2
Wire Wire Line
	1600 10100 1600 4300
Wire Wire Line
	1600 4300 2050 4300
Wire Wire Line
	2800 9100 2800 9850
Wire Wire Line
	2800 9850 4300 9850
Text Notes 3100 9700 0    50   ~ 0
Enable Firmware EPROM\non IO_SELECT low
Wire Wire Line
	1450 9650 4100 9650
Wire Wire Line
	2550 6250 2550 9100
Wire Wire Line
	2550 9100 2800 9100
Connection ~ 2550 6250
Wire Wire Line
	1600 10100 4700 10100
$Comp
L Jumper:Jumper_3_Bridged12 JP1
U 1 1 6080C80D
P 2100 9350
F 0 "JP1" H 2100 9554 50  0000 C CNN
F 1 "AT28C64B Busy / 27C256 VPP" H 2100 9463 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 2100 9350 50  0001 C CNN
F 3 "~" H 2100 9350 50  0001 C CNN
	1    2100 9350
	1    0    0    -1  
$EndComp
Wire Wire Line
	4300 9650 4300 9550
Wire Wire Line
	4300 9550 2100 9550
Wire Wire Line
	2100 9550 2100 9500
Wire Wire Line
	2350 9350 2350 7850
Connection ~ 2350 7850
Wire Wire Line
	2350 7850 4150 7850
$Comp
L Jumper:Jumper_3_Bridged12 JP2
U 1 1 60884040
P 7900 9500
F 0 "JP2" H 7900 9704 50  0000 C CNN
F 1 "AT28C64B NC / 27C256 A13" H 7900 9613 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 7900 9500 50  0001 C CNN
F 3 "~" H 7900 9500 50  0001 C CNN
	1    7900 9500
	1    0    0    -1  
$EndComp
$Comp
L Jumper:Jumper_3_Bridged12 JP3
U 1 1 608852FA
P 9000 9500
F 0 "JP3" H 9000 9704 50  0000 C CNN
F 1 "AT28C64B W / 27C256 A14" H 9000 9613 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 9000 9500 50  0001 C CNN
F 3 "~" H 9000 9500 50  0001 C CNN
	1    9000 9500
	1    0    0    -1  
$EndComp
Wire Wire Line
	9000 10300 9000 9650
Wire Wire Line
	7900 9650 7900 10250
Wire Wire Line
	8150 9500 8150 10250
Wire Wire Line
	8150 10250 11800 10250
Wire Wire Line
	9250 9500 9250 10300
Wire Wire Line
	9250 10300 11850 10300
Wire Wire Line
	8750 9500 8750 7400
Wire Wire Line
	8750 7400 2700 7400
Wire Wire Line
	2700 7400 2700 6800
Connection ~ 2700 6800
Wire Wire Line
	1850 9350 1850 10400
Wire Wire Line
	1850 10400 11950 10400
Wire Wire Line
	11800 4550 11800 5750
Wire Wire Line
	11850 4600 11850 5850
Wire Wire Line
	13200 2850 13200 5650
Wire Wire Line
	11550 5650 13200 5650
Wire Wire Line
	13150 2750 13150 5550
Wire Wire Line
	11550 5550 13150 5550
Wire Wire Line
	11550 5150 11950 5150
Wire Wire Line
	11950 5150 11950 10400
$EndSCHEMATC