pato-z80-home-computer/pat80-computer/hardware/schematics/pat80/pat80.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text Notes 12250 10950 0    79   ~ 0
Pat80 Z80 home computer
Text Notes 13000 11050 0    50   ~ 0
2021-03-15
$Comp
L Memory_EEPROM:28C256 U2
U 1 1 604F6B81
P 8600 6500
F 0 "U2" V 8646 5356 50  0000 R CNN
F 1 "256k (32k x 8) EEPROM" V 8555 5356 50  0000 R CNN
F 2 "" H 8600 6500 50  0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 8600 6500 50  0001 C CNN
	1    8600 6500
	0    -1   -1   0   
$EndComp
Entry Wire Line
	5900 6350 6000 6450
Entry Wire Line
	5900 6450 6000 6550
Entry Wire Line
	5900 6550 6000 6650
Entry Wire Line
	5900 6650 6000 6750
Entry Wire Line
	5900 6750 6000 6850
Entry Wire Line
	5900 6850 6000 6950
Entry Wire Line
	5900 6950 6000 7050
Entry Wire Line
	5900 7050 6000 7150
Entry Wire Line
	5900 7150 6000 7250
Entry Wire Line
	5900 7250 6000 7350
Entry Wire Line
	5900 7350 6000 7450
Entry Wire Line
	5900 7450 6000 7550
Entry Wire Line
	5900 7550 6000 7650
Entry Wire Line
	5900 7650 6000 7750
Entry Wire Line
	5900 7750 6000 7850
Wire Wire Line
	5600 6250 5900 6250
Wire Wire Line
	5600 6350 5900 6350
Wire Wire Line
	5600 6450 5900 6450
Wire Wire Line
	5600 6550 5900 6550
Wire Wire Line
	5600 6650 5900 6650
Wire Wire Line
	5600 6750 5900 6750
Wire Wire Line
	5600 6850 5900 6850
Wire Wire Line
	5600 6950 5900 6950
Wire Wire Line
	5600 7050 5900 7050
Wire Wire Line
	5600 7150 5900 7150
Wire Wire Line
	5600 7250 5900 7250
Wire Wire Line
	5600 7350 5900 7350
Wire Wire Line
	5600 7450 5900 7450
Wire Wire Line
	5600 7550 5900 7550
Wire Wire Line
	5600 7650 5900 7650
Wire Wire Line
	5600 7750 5900 7750
Entry Wire Line
	7700 7000 7600 7100
Entry Wire Line
	7800 7000 7700 7100
Entry Wire Line
	7900 7000 7800 7100
Entry Wire Line
	8000 7000 7900 7100
Entry Wire Line
	8100 7000 8000 7100
Entry Wire Line
	8200 7000 8100 7100
Entry Wire Line
	8300 7000 8200 7100
Entry Wire Line
	8400 7000 8300 7100
Entry Wire Line
	8500 7000 8400 7100
Entry Wire Line
	8600 7000 8500 7100
Entry Wire Line
	8700 7000 8600 7100
Entry Wire Line
	8800 7000 8700 7100
Entry Wire Line
	8900 7000 8800 7100
Entry Wire Line
	9000 7000 8900 7100
Entry Wire Line
	9100 7000 9000 7100
Wire Wire Line
	7700 6900 7700 7000
Wire Wire Line
	7800 6900 7800 7000
Wire Wire Line
	7900 6900 7900 7000
Wire Wire Line
	8000 6900 8000 7000
Wire Wire Line
	8100 6900 8100 7000
Wire Wire Line
	8200 6900 8200 7000
Wire Wire Line
	8300 6900 8300 7000
Wire Wire Line
	8400 6900 8400 7000
Wire Wire Line
	8500 6900 8500 7000
Wire Wire Line
	8600 6900 8600 7000
Wire Wire Line
	8700 6900 8700 7000
Wire Wire Line
	8800 6900 8800 7000
Wire Wire Line
	8900 6900 8900 7000
Wire Wire Line
	9000 6900 9000 7000
Wire Wire Line
	9100 6900 9100 7000
Text Label 5700 6250 0    50   ~ 0
A0
Text Label 5700 6350 0    50   ~ 0
A1
Text Label 5700 6450 0    50   ~ 0
A2
Text Label 5700 6550 0    50   ~ 0
A3
Text Label 5700 6650 0    50   ~ 0
A4
Text Label 5700 6750 0    50   ~ 0
A5
Text Label 5700 6850 0    50   ~ 0
A6
Text Label 5700 6950 0    50   ~ 0
A7
Text Label 5700 7050 0    50   ~ 0
A8
Text Label 5700 7150 0    50   ~ 0
A9
Text Label 5700 7250 0    50   ~ 0
A10
Text Label 5700 7350 0    50   ~ 0
A11
Text Label 5700 7450 0    50   ~ 0
A12
Text Label 5700 7550 0    50   ~ 0
A13
Text Label 5700 7650 0    50   ~ 0
A14
Text Label 5700 7750 0    50   ~ 0
A15
Text Label 7700 6950 3    50   ~ 0
A0
Text Label 7800 6950 3    50   ~ 0
A1
Text Label 7900 6950 3    50   ~ 0
A2
Text Label 8000 6950 3    50   ~ 0
A3
Text Label 8100 6950 3    50   ~ 0
A4
Text Label 8200 6950 3    50   ~ 0
A5
Text Label 8300 6950 3    50   ~ 0
A6
Text Label 8400 6950 3    50   ~ 0
A7
Text Label 8500 6950 3    50   ~ 0
A8
Text Label 8600 6950 3    50   ~ 0
A9
Text Label 8700 6950 3    50   ~ 0
A10
Text Label 8800 6950 3    50   ~ 0
A11
Text Label 8900 6950 3    50   ~ 0
A12
Text Label 9000 6950 3    50   ~ 0
A13
Text Label 9100 6950 3    50   ~ 0
A14
Entry Wire Line
	7700 8550 7600 8650
Entry Wire Line
	7800 8550 7700 8650
Entry Wire Line
	7900 8550 7800 8650
Entry Wire Line
	8000 8550 7900 8650
Entry Wire Line
	8100 8550 8000 8650
Entry Wire Line
	8200 8550 8100 8650
Entry Wire Line
	8300 8550 8200 8650
Entry Wire Line
	8400 8550 8300 8650
Entry Wire Line
	8500 8550 8400 8650
Entry Wire Line
	8600 8550 8500 8650
Entry Wire Line
	8700 8550 8600 8650
Entry Wire Line
	8800 8550 8700 8650
Entry Wire Line
	8900 8550 8800 8650
Entry Wire Line
	9000 8550 8900 8650
Entry Wire Line
	9100 8550 9000 8650
Wire Wire Line
	7700 8550 7700 8450
Wire Wire Line
	7800 8550 7800 8450
Wire Wire Line
	7900 8550 7900 8450
Wire Wire Line
	8000 8550 8000 8450
Wire Wire Line
	8100 8550 8100 8450
Wire Wire Line
	8200 8550 8200 8450
Wire Wire Line
	8300 8550 8300 8450
Wire Wire Line
	8400 8550 8400 8450
Wire Wire Line
	8500 8550 8500 8450
Wire Wire Line
	8600 8550 8600 8450
Wire Wire Line
	8700 8550 8700 8450
Wire Wire Line
	8800 8550 8800 8450
Wire Wire Line
	8900 8550 8900 8450
Wire Wire Line
	9000 8550 9000 8450
Wire Wire Line
	9100 8550 9100 8450
Text Label 7700 8500 3    50   ~ 0
A0
Text Label 7800 8500 3    50   ~ 0
A1
Text Label 7900 8500 3    50   ~ 0
A2
Text Label 8000 8500 3    50   ~ 0
A3
Text Label 8100 8500 3    50   ~ 0
A4
Text Label 8200 8500 3    50   ~ 0
A5
Text Label 8300 8500 3    50   ~ 0
A6
Text Label 8400 8500 3    50   ~ 0
A7
Text Label 8500 8500 3    50   ~ 0
A8
Text Label 8600 8500 3    50   ~ 0
A9
Text Label 8700 8500 3    50   ~ 0
A10
Text Label 8800 8500 3    50   ~ 0
A11
Text Label 8900 8500 3    50   ~ 0
A12
Text Label 9000 8500 3    50   ~ 0
A13
Text Label 9100 8500 3    50   ~ 0
A14
Entry Wire Line
	5900 7950 6000 8050
Entry Wire Line
	5900 7950 6000 8050
Entry Wire Line
	5900 8050 6000 8150
Entry Wire Line
	5900 8150 6000 8250
Entry Wire Line
	5900 8250 6000 8350
Entry Wire Line
	5900 8350 6000 8450
Entry Wire Line
	5900 8450 6000 8550
Entry Wire Line
	5900 8550 6000 8650
Entry Wire Line
	5900 8650 6000 8750
Wire Wire Line
	5600 7950 5900 7950
Wire Wire Line
	5600 8050 5900 8050
Wire Wire Line
	5600 8150 5900 8150
Wire Wire Line
	5600 8250 5900 8250
Wire Wire Line
	5600 8350 5900 8350
Wire Wire Line
	5600 8450 5900 8450
Wire Wire Line
	5600 8550 5900 8550
Wire Wire Line
	5600 8650 5900 8650
Wire Bus Line
	6000 9150 10350 9150
Entry Wire Line
	7700 7550 7800 7450
Entry Wire Line
	7900 7450 7800 7550
Entry Wire Line
	8000 7450 7900 7550
Entry Wire Line
	8100 7450 8000 7550
Entry Wire Line
	8200 7450 8100 7550
Entry Wire Line
	8300 7450 8200 7550
Entry Wire Line
	8400 7450 8300 7550
Entry Wire Line
	8500 7450 8400 7550
Wire Wire Line
	7700 7650 7700 7550
Wire Wire Line
	7800 7650 7800 7550
Wire Wire Line
	7900 7650 7900 7550
Wire Wire Line
	8000 7650 8000 7550
Wire Wire Line
	8100 7650 8100 7550
Wire Wire Line
	8200 7650 8200 7550
Wire Wire Line
	8300 7650 8300 7550
Wire Wire Line
	8400 7650 8400 7550
Wire Bus Line
	10350 7450 10350 9150
Entry Wire Line
	7800 5900 7700 6000
Entry Wire Line
	7900 5900 7800 6000
Entry Wire Line
	8000 5900 7900 6000
Entry Wire Line
	8100 5900 8000 6000
Entry Wire Line
	8200 5900 8100 6000
Entry Wire Line
	8300 5900 8200 6000
Entry Wire Line
	8400 5900 8300 6000
Entry Wire Line
	8500 5900 8400 6000
Wire Wire Line
	7700 6100 7700 6000
Wire Wire Line
	7800 6100 7800 6000
Wire Wire Line
	7900 6100 7900 6000
Wire Wire Line
	8000 6100 8000 6000
Wire Wire Line
	8100 6100 8100 6000
Wire Wire Line
	8200 6100 8200 6000
Wire Wire Line
	8300 6100 8300 6000
Wire Wire Line
	8400 6100 8400 6000
Wire Bus Line
	10350 5900 10350 7450
Connection ~ 10350 7450
Text Label 7700 6000 3    50   ~ 0
D0
Text Label 7800 6000 3    50   ~ 0
D1
Text Label 7900 6000 3    50   ~ 0
D2
Text Label 8000 6000 3    50   ~ 0
D3
Text Label 8100 6000 3    50   ~ 0
D4
Text Label 8200 6000 3    50   ~ 0
D5
Text Label 8300 6000 3    50   ~ 0
D6
Text Label 8400 6000 3    50   ~ 0
D7
Text Label 7700 7550 3    50   ~ 0
D0
Text Label 7800 7550 3    50   ~ 0
D1
Text Label 7900 7550 3    50   ~ 0
D2
Text Label 8000 7550 3    50   ~ 0
D3
Text Label 8100 7550 3    50   ~ 0
D4
Text Label 8200 7550 3    50   ~ 0
D5
Text Label 8300 7550 3    50   ~ 0
D6
Text Label 8400 7550 3    50   ~ 0
D7
Text Label 5700 7950 0    50   ~ 0
D0
Text Label 5700 8050 0    50   ~ 0
D1
Text Label 5700 8150 0    50   ~ 0
D2
Text Label 5700 8250 0    50   ~ 0
D3
Text Label 5700 8350 0    50   ~ 0
D4
Text Label 5700 8450 0    50   ~ 0
D5
Text Label 5700 8550 0    50   ~ 0
D6
Text Label 5700 8650 0    50   ~ 0
D7
Entry Wire Line
	5900 6250 6000 6350
$Comp
L Memory_EEPROM:28C256 U3
U 1 1 604FD5C5
P 8600 8050
F 0 "U3" V 8646 6906 50  0000 R CNN
F 1 "256k (32k x 8) SRAM" V 8555 6906 50  0000 R CNN
F 2 "" H 8600 8050 50  0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 8600 8050 50  0001 C CNN
	1    8600 8050
	0    -1   -1   0   
$EndComp
$Comp
L power:GND #PWR019
U 1 1 60507104
P 9700 6500
F 0 "#PWR019" H 9700 6250 50  0001 C CNN
F 1 "GND" H 9705 6327 50  0000 C CNN
F 2 "" H 9700 6500 50  0001 C CNN
F 3 "" H 9700 6500 50  0001 C CNN
	1    9700 6500
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR020
U 1 1 6050737A
P 9700 8050
F 0 "#PWR020" H 9700 7800 50  0001 C CNN
F 1 "GND" H 9705 7877 50  0000 C CNN
F 2 "" H 9700 8050 50  0001 C CNN
F 3 "" H 9700 8050 50  0001 C CNN
	1    9700 8050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR013
U 1 1 605076F8
P 4900 8950
F 0 "#PWR013" H 4900 8700 50  0001 C CNN
F 1 "GND" H 4905 8777 50  0000 C CNN
F 2 "" H 4900 8950 50  0001 C CNN
F 3 "" H 4900 8950 50  0001 C CNN
	1    4900 8950
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR012
U 1 1 60507B8E
P 4900 5450
F 0 "#PWR012" H 4900 5300 50  0001 C CNN
F 1 "VCC" H 4917 5623 50  0000 C CNN
F 2 "" H 4900 5450 50  0001 C CNN
F 3 "" H 4900 5450 50  0001 C CNN
	1    4900 5450
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR017
U 1 1 60507E3C
P 7500 6500
F 0 "#PWR017" H 7500 6350 50  0001 C CNN
F 1 "VCC" H 7517 6673 50  0000 C CNN
F 2 "" H 7500 6500 50  0001 C CNN
F 3 "" H 7500 6500 50  0001 C CNN
	1    7500 6500
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR018
U 1 1 605080EF
P 7500 8050
F 0 "#PWR018" H 7500 7900 50  0001 C CNN
F 1 "VCC" H 7517 8223 50  0000 C CNN
F 2 "" H 7500 8050 50  0001 C CNN
F 3 "" H 7500 8050 50  0001 C CNN
	1    7500 8050
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR08
U 1 1 60508CD5
P 4050 8550
F 0 "#PWR08" H 4050 8400 50  0001 C CNN
F 1 "VCC" H 4067 8723 50  0000 C CNN
F 2 "" H 4050 8550 50  0001 C CNN
F 3 "" H 4050 8550 50  0001 C CNN
	1    4050 8550
	1    0    0    -1  
$EndComp
$Comp
L CPU:Z80CPU U1
U 1 1 604F040E
P 4900 7450
F 0 "U1" H 4900 9131 50  0000 C CNN
F 1 "Z80CPU" H 4900 9040 50  0000 C CNN
F 2 "" H 4900 7850 50  0001 C CNN
F 3 "www.zilog.com/manage_directlink.php?filepath=docs/z80/um0080" H 4900 7850 50  0001 C CNN
	1    4900 7450
	1    0    0    -1  
$EndComp
Wire Wire Line
	4200 7450 4050 7450
$Comp
L power:VCC #PWR07
U 1 1 6050EE1E
P 4050 7450
F 0 "#PWR07" H 4050 7300 50  0001 C CNN
F 1 "VCC" H 4067 7623 50  0000 C CNN
F 2 "" H 4050 7450 50  0001 C CNN
F 3 "" H 4050 7450 50  0001 C CNN
	1    4050 7450
	1    0    0    -1  
$EndComp
$Comp
L Device:C C8
U 1 1 6055A1F9
P 5300 5450
F 0 "C8" V 5048 5450 50  0000 C CNN
F 1 "100nF" V 5139 5450 50  0000 C CNN
F 2 "" H 5338 5300 50  0001 C CNN
F 3 "~" H 5300 5450 50  0001 C CNN
	1    5300 5450
	0    1    1    0   
$EndComp
$Comp
L Device:C C9
U 1 1 6055A9DD
P 5300 5650
F 0 "C9" V 5048 5650 50  0000 C CNN
F 1 "56pF" V 5139 5650 50  0000 C CNN
F 2 "" H 5338 5500 50  0001 C CNN
F 3 "~" H 5300 5650 50  0001 C CNN
	1    5300 5650
	0    1    1    0   
$EndComp
Wire Wire Line
	5450 5450 5450 5550
$Comp
L power:GND #PWR014
U 1 1 60567CC3
P 5550 5550
F 0 "#PWR014" H 5550 5300 50  0001 C CNN
F 1 "GND" H 5555 5377 50  0000 C CNN
F 2 "" H 5550 5550 50  0001 C CNN
F 3 "" H 5550 5550 50  0001 C CNN
	1    5550 5550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5550 5550 5450 5550
Connection ~ 5450 5550
Wire Wire Line
	5450 5550 5450 5650
Wire Wire Line
	4900 5450 4900 5550
Wire Wire Line
	5150 5650 5150 5550
Wire Wire Line
	5150 5550 4900 5550
Connection ~ 5150 5550
Wire Wire Line
	5150 5550 5150 5450
Connection ~ 4900 5550
Wire Wire Line
	4900 5550 4900 5950
Text Notes 5050 5850 0    50   ~ 0
Smoothing caps
Wire Wire Line
	4200 8550 4050 8550
Text Notes 15450 11050 0    50   ~ 0
0.1 alpha
$Comp
L 74xx:74HC04 U11
U 6 1 605236EF
P 2950 5650
F 0 "U11" V 2904 5830 50  0000 L CNN
F 1 "74LS32" V 2995 5830 50  0000 L CNN
F 2 "" H 2950 5650 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 2950 5650 50  0001 C CNN
	6    2950 5650
	0    1    1    0   
$EndComp
Wire Wire Line
	4100 5600 4000 5600
Connection ~ 4100 5600
Connection ~ 4100 5500
Wire Wire Line
	4100 5500 4100 5600
Wire Wire Line
	4200 5600 4100 5600
Wire Wire Line
	4500 5150 4650 5150
Connection ~ 4100 5150
Wire Wire Line
	4200 5150 4100 5150
$Comp
L Device:R R5
U 1 1 60584118
P 4350 5150
F 0 "R5" H 4420 5196 50  0000 L CNN
F 1 "270k" H 4420 5105 50  0000 L CNN
F 2 "" V 4280 5150 50  0001 C CNN
F 3 "~" H 4350 5150 50  0001 C CNN
	1    4350 5150
	0    1    1    0   
$EndComp
Text Notes 3300 4950 0    50   ~ 0
Reset circuit with\ndebouncing and\npower-on-reset
Wire Wire Line
	4100 6200 4100 6250
Connection ~ 3600 5150
Wire Wire Line
	3600 5150 3600 5500
Wire Wire Line
	3600 5150 3450 5150
$Comp
L power:GND #PWR06
U 1 1 605315B7
P 3450 5150
F 0 "#PWR06" H 3450 4900 50  0001 C CNN
F 1 "GND" H 3455 4977 50  0000 C CNN
F 2 "" H 3450 5150 50  0001 C CNN
F 3 "" H 3450 5150 50  0001 C CNN
	1    3450 5150
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR011
U 1 1 60530F78
P 4650 5150
F 0 "#PWR011" H 4650 5000 50  0001 C CNN
F 1 "VCC" H 4667 5323 50  0000 C CNN
F 2 "" H 4650 5150 50  0001 C CNN
F 3 "" H 4650 5150 50  0001 C CNN
	1    4650 5150
	1    0    0    -1  
$EndComp
Wire Wire Line
	3650 5500 3600 5500
Wire Wire Line
	4100 5150 4000 5150
Wire Wire Line
	4100 5500 4100 5150
Wire Wire Line
	3950 5500 4100 5500
$Comp
L Device:C C6
U 1 1 6052B4C4
P 3800 5500
F 0 "C6" H 3915 5546 50  0000 L CNN
F 1 "10uF" H 3915 5455 50  0000 L CNN
F 2 "" H 3838 5350 50  0001 C CNN
F 3 "~" H 3800 5500 50  0001 C CNN
	1    3800 5500
	0    1    1    0   
$EndComp
$Comp
L Switch:SW_Push SW1
U 1 1 60528DA4
P 3800 5150
F 0 "SW1" V 3800 5102 50  0000 R CNN
F 1 "SW_Push" V 3755 5102 50  0001 R CNN
F 2 "" H 3800 5350 50  0001 C CNN
F 3 "" H 3800 5350 50  0001 C CNN
	1    3800 5150
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS32 U10
U 4 1 6051C888
P 4100 5900
F 0 "U10" H 4100 6225 50  0000 C CNN
F 1 "74LS32" H 4100 6134 50  0000 C CNN
F 2 "" H 4100 5900 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 4100 5900 50  0001 C CNN
	4    4100 5900
	0    1    1    0   
$EndComp
$Comp
L Device:C C2
U 1 1 605648D0
P 1850 5350
F 0 "C2" V 1598 5350 50  0000 C CNN
F 1 "30pF" V 1689 5350 50  0000 C CNN
F 2 "" H 1888 5200 50  0001 C CNN
F 3 "~" H 1850 5350 50  0001 C CNN
	1    1850 5350
	0    1    1    0   
$EndComp
$Comp
L Device:C C3
U 1 1 60567676
P 1850 5950
F 0 "C3" V 1598 5950 50  0000 C CNN
F 1 "30pF" V 1689 5950 50  0000 C CNN
F 2 "" H 1888 5800 50  0001 C CNN
F 3 "~" H 1850 5950 50  0001 C CNN
	1    1850 5950
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR02
U 1 1 6056B22E
P 1600 5350
F 0 "#PWR02" H 1600 5100 50  0001 C CNN
F 1 "GND" H 1605 5177 50  0000 C CNN
F 2 "" H 1600 5350 50  0001 C CNN
F 3 "" H 1600 5350 50  0001 C CNN
	1    1600 5350
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR03
U 1 1 6056C411
P 1600 5950
F 0 "#PWR03" H 1600 5700 50  0001 C CNN
F 1 "GND" H 1605 5777 50  0000 C CNN
F 2 "" H 1600 5950 50  0001 C CNN
F 3 "" H 1600 5950 50  0001 C CNN
	1    1600 5950
	1    0    0    -1  
$EndComp
Wire Wire Line
	1600 5950 1700 5950
Wire Wire Line
	1600 5350 1700 5350
$Comp
L Device:R R1
U 1 1 60581F4C
P 2150 5650
F 0 "R1" H 2220 5696 50  0000 L CNN
F 1 "3,3M" H 2220 5605 50  0000 L CNN
F 2 "" V 2080 5650 50  0001 C CNN
F 3 "~" H 2150 5650 50  0001 C CNN
	1    2150 5650
	1    0    0    -1  
$EndComp
$Comp
L Device:Crystal Y1
U 1 1 6058BCE7
P 2500 5650
F 0 "Y1" V 2454 5781 50  0000 L CNN
F 1 "4Mhz" V 2545 5781 50  0000 L CNN
F 2 "" H 2500 5650 50  0001 C CNN
F 3 "~" H 2500 5650 50  0001 C CNN
	1    2500 5650
	0    1    1    0   
$EndComp
Wire Wire Line
	2000 5350 2150 5350
Wire Wire Line
	2500 5500 2500 5350
Connection ~ 2500 5350
Wire Wire Line
	2500 5350 2950 5350
Wire Wire Line
	2150 5500 2150 5350
Connection ~ 2150 5350
Wire Wire Line
	2150 5350 2500 5350
Wire Wire Line
	2000 5950 2150 5950
Wire Wire Line
	2150 5800 2150 5950
Connection ~ 2150 5950
Wire Wire Line
	2150 5950 2500 5950
Wire Wire Line
	2500 5800 2500 5950
Connection ~ 2500 5950
Wire Wire Line
	2500 5950 2950 5950
Text Notes 2100 6150 0    50   ~ 0
System clock\n    4Mhz
$Comp
L 74xx:74HC04 U11
U 5 1 605A807A
P 2950 6250
F 0 "U11" V 2904 6430 50  0000 L CNN
F 1 "74LS32" V 2995 6430 50  0000 L CNN
F 2 "" H 2950 6250 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 2950 6250 50  0001 C CNN
	5    2950 6250
	0    1    1    0   
$EndComp
Wire Wire Line
	4100 6250 4200 6250
Connection ~ 2950 5950
Wire Wire Line
	4200 6550 2950 6550
$Comp
L Device:C C11
U 1 1 606345AE
P 7100 6600
F 0 "C11" V 6848 6600 50  0000 C CNN
F 1 "100nF" V 6939 6600 50  0000 C CNN
F 2 "" H 7138 6450 50  0001 C CNN
F 3 "~" H 7100 6600 50  0001 C CNN
	1    7100 6600
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C10
U 1 1 606345B4
P 7100 6400
F 0 "C10" V 6848 6400 50  0000 C CNN
F 1 "56pF" V 6939 6400 50  0000 C CNN
F 2 "" H 7138 6250 50  0001 C CNN
F 3 "~" H 7100 6400 50  0001 C CNN
	1    7100 6400
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6950 6600 6950 6500
$Comp
L power:GND #PWR015
U 1 1 606345BB
P 6850 6500
F 0 "#PWR015" H 6850 6250 50  0001 C CNN
F 1 "GND" H 6855 6327 50  0000 C CNN
F 2 "" H 6850 6500 50  0001 C CNN
F 3 "" H 6850 6500 50  0001 C CNN
	1    6850 6500
	-1   0    0    1   
$EndComp
Wire Wire Line
	6850 6500 6950 6500
Connection ~ 6950 6500
Wire Wire Line
	6950 6500 6950 6400
Wire Wire Line
	7250 6400 7250 6500
Wire Wire Line
	7250 6500 7500 6500
Connection ~ 7250 6500
Wire Wire Line
	7250 6500 7250 6600
Text Notes 7350 6250 2    50   ~ 0
Smoothing caps
$Comp
L Device:C C13
U 1 1 60649CA8
P 7250 8150
F 0 "C13" V 6998 8150 50  0000 C CNN
F 1 "100nF" V 7089 8150 50  0000 C CNN
F 2 "" H 7288 8000 50  0001 C CNN
F 3 "~" H 7250 8150 50  0001 C CNN
	1    7250 8150
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C12
U 1 1 60649CAE
P 7250 7950
F 0 "C12" V 6998 7950 50  0000 C CNN
F 1 "56pF" V 7089 7950 50  0000 C CNN
F 2 "" H 7288 7800 50  0001 C CNN
F 3 "~" H 7250 7950 50  0001 C CNN
	1    7250 7950
	0    -1   -1   0   
$EndComp
Wire Wire Line
	7100 8150 7100 8050
$Comp
L power:GND #PWR016
U 1 1 60649CB5
P 7000 8050
F 0 "#PWR016" H 7000 7800 50  0001 C CNN
F 1 "GND" H 7005 7877 50  0000 C CNN
F 2 "" H 7000 8050 50  0001 C CNN
F 3 "" H 7000 8050 50  0001 C CNN
	1    7000 8050
	-1   0    0    1   
$EndComp
Wire Wire Line
	7000 8050 7100 8050
Connection ~ 7100 8050
Wire Wire Line
	7100 8050 7100 7950
Wire Wire Line
	7400 7950 7400 8050
Wire Wire Line
	7400 8050 7500 8050
Connection ~ 7400 8050
Wire Wire Line
	7400 8050 7400 8150
Connection ~ 7500 8050
$Comp
L Device:R R3
U 1 1 60661B57
P 2500 6850
F 0 "R3" V 2293 6850 50  0000 C CNN
F 1 "10k" V 2384 6850 50  0000 C CNN
F 2 "" V 2430 6850 50  0001 C CNN
F 3 "~" H 2500 6850 50  0001 C CNN
	1    2500 6850
	0    1    1    0   
$EndComp
$Comp
L Device:R R2
U 1 1 60662809
P 2200 6950
F 0 "R2" V 1993 6950 50  0000 C CNN
F 1 "10k" V 2084 6950 50  0000 C CNN
F 2 "" V 2130 6950 50  0001 C CNN
F 3 "~" H 2200 6950 50  0001 C CNN
	1    2200 6950
	0    1    1    0   
$EndComp
$Comp
L power:VCC #PWR04
U 1 1 60663175
P 2050 6600
F 0 "#PWR04" H 2050 6450 50  0001 C CNN
F 1 "VCC" H 2067 6773 50  0000 C CNN
F 2 "" H 2050 6600 50  0001 C CNN
F 3 "" H 2050 6600 50  0001 C CNN
	1    2050 6600
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 6600 2050 6850
Wire Wire Line
	2350 6850 2050 6850
Connection ~ 2050 6850
Wire Wire Line
	2050 6850 2050 6950
Wire Wire Line
	2650 6850 4200 6850
Wire Wire Line
	2350 6950 3050 6950
$Comp
L Switch:SW_Push SW2
U 1 1 6067F418
P 1600 7050
F 0 "SW2" H 1600 7335 50  0000 C CNN
F 1 "Break" H 1600 7244 50  0000 C CNN
F 2 "" H 1600 7250 50  0001 C CNN
F 3 "" H 1600 7250 50  0001 C CNN
	1    1600 7050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR01
U 1 1 60681E2A
P 1300 7050
F 0 "#PWR01" H 1300 6800 50  0001 C CNN
F 1 "GND" H 1305 6877 50  0000 C CNN
F 2 "" H 1300 7050 50  0001 C CNN
F 3 "" H 1300 7050 50  0001 C CNN
	1    1300 7050
	1    0    0    -1  
$EndComp
$Comp
L Device:C C1
U 1 1 6068233C
P 1600 6600
F 0 "C1" V 1348 6600 50  0000 C CNN
F 1 "10uF" V 1439 6600 50  0000 C CNN
F 2 "" H 1638 6450 50  0001 C CNN
F 3 "~" H 1600 6600 50  0001 C CNN
	1    1600 6600
	0    1    1    0   
$EndComp
Wire Wire Line
	1450 6600 1400 6600
Wire Wire Line
	1400 6600 1400 7050
Wire Wire Line
	1300 7050 1400 7050
Connection ~ 1400 7050
Wire Wire Line
	1750 6600 1800 6600
Wire Wire Line
	1800 6600 1800 7050
Wire Wire Line
	1800 7050 3050 7050
Wire Wire Line
	3050 7050 3050 6950
Connection ~ 1800 7050
Connection ~ 3050 6950
Wire Wire Line
	3050 6950 4200 6950
Text Notes 1250 7500 0    50   ~ 0
"Break" button
$Comp
L Connector:Conn_01x01_Male J4
U 1 1 606A5B44
P 4100 4700
F 0 "J4" V 4162 4744 50  0000 L CNN
F 1 "panel_btn_rst" V 4253 4744 50  0000 L CNN
F 2 "" H 4100 4700 50  0001 C CNN
F 3 "~" H 4100 4700 50  0001 C CNN
	1    4100 4700
	0    1    1    0   
$EndComp
Wire Wire Line
	4100 4900 4100 5150
$Comp
L Connector:Conn_01x01_Male J1
U 1 1 606C1179
P 1800 7350
F 0 "J1" V 1954 7262 50  0000 R CNN
F 1 "panel_btn_brk" V 1863 7262 50  0000 R CNN
F 2 "" H 1800 7350 50  0001 C CNN
F 3 "~" H 1800 7350 50  0001 C CNN
	1    1800 7350
	0    -1   -1   0   
$EndComp
Wire Wire Line
	1800 7150 1800 7050
$Comp
L Device:LED D1
U 1 1 606D4ECC
P 3050 7550
F 0 "D1" H 3043 7295 50  0000 C CNN
F 1 "LED" H 3043 7386 50  0000 C CNN
F 2 "" H 3050 7550 50  0001 C CNN
F 3 "~" H 3050 7550 50  0001 C CNN
	1    3050 7550
	-1   0    0    1   
$EndComp
Wire Wire Line
	3200 7550 3350 7550
$Comp
L Device:R R4
U 1 1 606E9AF9
P 2750 7550
F 0 "R4" V 2543 7550 50  0000 C CNN
F 1 "470" V 2634 7550 50  0000 C CNN
F 2 "" V 2680 7550 50  0001 C CNN
F 3 "~" H 2750 7550 50  0001 C CNN
	1    2750 7550
	0    1    1    0   
$EndComp
$Comp
L power:VCC #PWR05
U 1 1 606EA531
P 2500 7550
F 0 "#PWR05" H 2500 7400 50  0001 C CNN
F 1 "VCC" H 2517 7723 50  0000 C CNN
F 2 "" H 2500 7550 50  0001 C CNN
F 3 "" H 2500 7550 50  0001 C CNN
	1    2500 7550
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 7550 2600 7550
$Comp
L Connector:Conn_01x01_Male J3
U 1 1 60701566
P 3350 7150
F 0 "J3" V 3412 7194 50  0000 L CNN
F 1 "panel_led_halt" V 3503 7194 50  0000 L CNN
F 2 "" H 3350 7150 50  0001 C CNN
F 3 "~" H 3350 7150 50  0001 C CNN
	1    3350 7150
	0    1    1    0   
$EndComp
Wire Wire Line
	3350 7350 3350 7550
Connection ~ 3350 7550
Wire Wire Line
	3350 7550 4200 7550
NoConn ~ 4200 7350
NoConn ~ 4200 7250
NoConn ~ 4200 8150
NoConn ~ 4200 8650
Wire Bus Line
	6000 7850 6550 7850
Wire Bus Line
	6550 7850 6550 7100
Wire Bus Line
	6550 8650 6550 7850
Connection ~ 6550 7850
Connection ~ 7500 6500
Entry Wire Line
	7200 3650 7100 3550
Entry Wire Line
	7200 3550 7100 3450
Entry Wire Line
	7200 3450 7100 3350
Entry Wire Line
	7200 3350 7100 3250
Entry Wire Line
	7200 3250 7100 3150
Entry Wire Line
	7200 3150 7100 3050
Entry Wire Line
	7200 3050 7100 2950
Entry Wire Line
	7200 2950 7100 2850
Entry Wire Line
	7200 2850 7100 2750
Entry Wire Line
	7200 2750 7100 2650
Entry Wire Line
	7200 2650 7100 2550
Entry Wire Line
	7200 2550 7100 2450
Entry Wire Line
	7200 2450 7100 2350
Entry Wire Line
	7200 2350 7100 2250
Entry Wire Line
	7200 2250 7100 2150
Wire Wire Line
	7500 2950 7200 2950
Wire Wire Line
	7500 2850 7200 2850
Wire Wire Line
	7500 2750 7200 2750
Wire Wire Line
	7500 2650 7200 2650
Wire Wire Line
	7500 2550 7200 2550
Wire Wire Line
	7500 2450 7200 2450
Wire Wire Line
	7500 2350 7200 2350
Text Label 7400 3750 2    50   ~ 0
A0
Text Label 7400 3650 2    50   ~ 0
A1
Text Label 7400 3550 2    50   ~ 0
A2
Text Label 7400 3450 2    50   ~ 0
A3
Text Label 7400 3350 2    50   ~ 0
A4
Text Label 7400 3250 2    50   ~ 0
A5
Text Label 7400 3150 2    50   ~ 0
A6
Text Label 7400 3050 2    50   ~ 0
A7
Text Label 7400 2950 2    50   ~ 0
A8
Text Label 7400 2850 2    50   ~ 0
A9
Text Label 7400 2750 2    50   ~ 0
A10
Text Label 7400 2650 2    50   ~ 0
A11
Text Label 7400 2550 2    50   ~ 0
A12
Text Label 7400 2450 2    50   ~ 0
A13
Text Label 7400 2350 2    50   ~ 0
A14
Text Label 7400 2250 2    50   ~ 0
A15
Entry Wire Line
	7200 3750 7100 3650
Wire Bus Line
	7100 2150 6550 2150
Text HLabel 4200 8250 0    50   Output ~ 0
IORQ
Text Notes 9300 2350 0    50   ~ 0
Memory decoding logic
Text HLabel 8850 1950 0    50   Input ~ 0
IORQ
$Comp
L 74xx:74HC04 U11
U 2 1 60689B1C
P 9150 2000
F 0 "U11" H 9150 2317 50  0000 C CNN
F 1 "74LS32" H 9150 2226 50  0000 C CNN
F 2 "" H 9150 2000 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 9150 2000 50  0001 C CNN
	2    9150 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	8850 1000 8850 1200
Wire Wire Line
	7200 2250 8500 2250
$Comp
L 74xx:74HC04 U11
U 1 1 6054CE0E
P 9150 1000
F 0 "U11" H 9150 1317 50  0000 C CNN
F 1 "74HC04" H 9150 1226 50  0000 C CNN
F 2 "" H 9150 1000 50  0001 C CNN
F 3 "http://www.nxp.com/documents/data_sheet/74HC_HCT04.pdf" H 9150 1000 50  0001 C CNN
	1    9150 1000
	1    0    0    -1  
$EndComp
Wire Wire Line
	8500 2250 8500 1200
Wire Wire Line
	8500 1200 8850 1200
Connection ~ 8850 1200
Wire Wire Line
	8850 1200 8850 1400
$Comp
L 74xx:74LS32 U10
U 1 1 60716E05
P 10800 1900
F 0 "U10" H 10800 1583 50  0000 C CNN
F 1 "74LS32" H 10800 1674 50  0000 C CNN
F 2 "" H 10800 1900 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 10800 1900 50  0001 C CNN
	1    10800 1900
	1    0    0    1   
$EndComp
Wire Wire Line
	9450 1000 10250 1000
Wire Wire Line
	10250 1000 10250 1800
Wire Wire Line
	10250 1800 10500 1800
Wire Wire Line
	9450 2000 9850 2000
$Comp
L 74xx:74LS32 U10
U 2 1 606614CA
P 9150 1500
F 0 "U10" H 9150 1183 50  0000 C CNN
F 1 "74LS32" H 9150 1274 50  0000 C CNN
F 2 "" H 9150 1500 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 9150 1500 50  0001 C CNN
	2    9150 1500
	1    0    0    1   
$EndComp
Wire Wire Line
	8850 1600 8850 1800
Wire Wire Line
	8850 1800 9850 1800
Wire Wire Line
	9850 1800 9850 2000
Connection ~ 9850 2000
Wire Wire Line
	9850 2000 10500 2000
Text HLabel 11100 1900 2    50   Output ~ 0
RAMEN
Text HLabel 9450 1500 2    50   Output ~ 0
ROMEN
Text HLabel 9500 8650 3    50   Input ~ 0
RAMEN
Wire Wire Line
	9500 8450 9500 8650
Text HLabel 9500 7100 3    50   Input ~ 0
ROMEN
Wire Wire Line
	9500 6900 9500 7100
Text HLabel 4200 7950 0    50   Output ~ 0
RD
Text HLabel 4200 8050 0    50   Output ~ 0
WR
Text HLabel 9400 7100 3    50   Input ~ 0
RD
Text HLabel 9300 7100 3    50   Input ~ 0
WR
Wire Wire Line
	9300 7100 9300 6900
Wire Wire Line
	9400 7100 9400 6900
Text HLabel 9400 8650 3    50   Input ~ 0
RD
Text HLabel 9300 8650 3    50   Input ~ 0
WR
Wire Wire Line
	9300 8650 9300 8450
Wire Wire Line
	9400 8650 9400 8450
Text Notes 10750 5250 0    50   ~ 0
I/O Decoding logic
Text Notes 8500 9400 0    50   ~ 0
Memory
$Comp
L 74xx:74LS138 U20
U 1 1 60832D85
P 12450 2800
F 0 "U20" H 12450 3581 50  0000 C CNN
F 1 "74LS138" H 12450 3490 50  0000 C CNN
F 2 "" H 12450 2800 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS138" H 12450 2800 50  0001 C CNN
	1    12450 2800
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR028
U 1 1 608389FF
P 12450 3500
F 0 "#PWR028" H 12450 3250 50  0001 C CNN
F 1 "GND" H 12455 3327 50  0000 C CNN
F 2 "" H 12450 3500 50  0001 C CNN
F 3 "" H 12450 3500 50  0001 C CNN
	1    12450 3500
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR027
U 1 1 6084DC47
P 12450 1700
F 0 "#PWR027" H 12450 1550 50  0001 C CNN
F 1 "VCC" H 12467 1873 50  0000 C CNN
F 2 "" H 12450 1700 50  0001 C CNN
F 3 "" H 12450 1700 50  0001 C CNN
	1    12450 1700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C18
U 1 1 6084DC4D
P 12850 1700
F 0 "C18" V 12598 1700 50  0000 C CNN
F 1 "100nF" V 12689 1700 50  0000 C CNN
F 2 "" H 12888 1550 50  0001 C CNN
F 3 "~" H 12850 1700 50  0001 C CNN
	1    12850 1700
	0    1    1    0   
$EndComp
$Comp
L Device:C C19
U 1 1 6084DC53
P 12850 1900
F 0 "C19" V 12598 1900 50  0000 C CNN
F 1 "56pF" V 12689 1900 50  0000 C CNN
F 2 "" H 12888 1750 50  0001 C CNN
F 3 "~" H 12850 1900 50  0001 C CNN
	1    12850 1900
	0    1    1    0   
$EndComp
Wire Wire Line
	13000 1700 13000 1800
$Comp
L power:GND #PWR030
U 1 1 6084DC5A
P 13100 1800
F 0 "#PWR030" H 13100 1550 50  0001 C CNN
F 1 "GND" H 13105 1627 50  0000 C CNN
F 2 "" H 13100 1800 50  0001 C CNN
F 3 "" H 13100 1800 50  0001 C CNN
	1    13100 1800
	1    0    0    -1  
$EndComp
Wire Wire Line
	13100 1800 13000 1800
Connection ~ 13000 1800
Wire Wire Line
	13000 1800 13000 1900
Wire Wire Line
	12450 1700 12450 1800
Wire Wire Line
	12700 1900 12700 1800
Wire Wire Line
	12700 1800 12450 1800
Connection ~ 12700 1800
Wire Wire Line
	12700 1800 12700 1700
Connection ~ 12450 1800
Wire Wire Line
	12450 1800 12450 2200
Text Notes 12600 2100 0    50   ~ 0
Smoothing caps
Wire Wire Line
	11950 2500 8000 2500
Wire Wire Line
	8000 2500 8000 3250
Wire Wire Line
	7200 3250 8000 3250
Wire Wire Line
	11950 2600 8150 2600
Wire Wire Line
	8150 2600 8150 3150
Wire Wire Line
	7200 3150 8150 3150
Wire Wire Line
	11950 2700 8300 2700
Wire Wire Line
	8300 2700 8300 3050
Wire Wire Line
	7200 3050 8300 3050
Wire Wire Line
	11950 3200 11950 3150
Text HLabel 11650 3150 0    50   Input ~ 0
IORQ
Wire Wire Line
	11650 3150 11950 3150
Connection ~ 11950 3150
Wire Wire Line
	11950 3150 11950 3100
$Comp
L power:VCC #PWR024
U 1 1 608D60DB
P 11650 3000
F 0 "#PWR024" H 11650 2850 50  0001 C CNN
F 1 "VCC" H 11667 3173 50  0000 C CNN
F 2 "" H 11650 3000 50  0001 C CNN
F 3 "" H 11650 3000 50  0001 C CNN
	1    11650 3000
	1    0    0    -1  
$EndComp
Wire Wire Line
	11650 3000 11950 3000
Wire Wire Line
	12950 2500 14050 2500
Entry Wire Line
	14050 2500 14150 2600
Wire Wire Line
	12950 2600 14050 2600
Entry Wire Line
	14050 2600 14150 2700
Wire Wire Line
	12950 2700 14050 2700
Entry Wire Line
	14050 2700 14150 2800
Wire Wire Line
	12950 2800 14050 2800
Entry Wire Line
	14050 2800 14150 2900
Wire Wire Line
	12950 2900 14050 2900
Entry Wire Line
	14050 2900 14150 3000
Wire Wire Line
	12950 3000 14050 3000
Entry Wire Line
	14050 3000 14150 3100
Wire Wire Line
	12950 3100 14050 3100
Entry Wire Line
	14050 3100 14150 3200
Wire Wire Line
	12950 3200 14050 3200
Entry Wire Line
	14050 3200 14150 3300
Text GLabel 14150 7600 3    50   BiDi ~ 0
IOBUS
Text Label 12950 2500 0    50   ~ 0
IOEN0
Text Label 12950 2600 0    50   ~ 0
IOEN1
Text Label 12950 2700 0    50   ~ 0
IOEN2
Text Label 12950 2800 0    50   ~ 0
IOEN3
Text Label 12950 2900 0    50   ~ 0
IOEN4
Text Label 12950 3000 0    50   ~ 0
IOEN5
Text Label 12950 3100 0    50   ~ 0
IOEN6
Text Label 12950 3200 0    50   ~ 0
IOEN7
$Comp
L 74xx:74HC244 U21
U 1 1 6057058E
P 9850 4350
F 0 "U21" H 9850 5331 50  0000 C CNN
F 1 "74HC244" H 9850 5240 50  0000 C CNN
F 2 "" H 9850 4350 50  0001 C CNN
F 3 "http://www.nxp.com/documents/data_sheet/74HC_HCT244.pdf" H 9850 4350 50  0001 C CNN
	1    9850 4350
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR022
U 1 1 60571DDE
P 9850 5150
F 0 "#PWR022" H 9850 4900 50  0001 C CNN
F 1 "GND" H 9855 4977 50  0000 C CNN
F 2 "" H 9850 5150 50  0001 C CNN
F 3 "" H 9850 5150 50  0001 C CNN
	1    9850 5150
	1    0    0    -1  
$EndComp
Wire Bus Line
	6550 2150 6550 7100
Connection ~ 6550 7100
$Comp
L power:VCC #PWR021
U 1 1 6062D6E7
P 9850 3050
F 0 "#PWR021" H 9850 2900 50  0001 C CNN
F 1 "VCC" H 9867 3223 50  0000 C CNN
F 2 "" H 9850 3050 50  0001 C CNN
F 3 "" H 9850 3050 50  0001 C CNN
	1    9850 3050
	1    0    0    -1  
$EndComp
$Comp
L Device:C C14
U 1 1 6062D6ED
P 10250 3050
F 0 "C14" V 9998 3050 50  0000 C CNN
F 1 "100nF" V 10089 3050 50  0000 C CNN
F 2 "" H 10288 2900 50  0001 C CNN
F 3 "~" H 10250 3050 50  0001 C CNN
	1    10250 3050
	0    1    1    0   
$EndComp
$Comp
L Device:C C15
U 1 1 6062D6F3
P 10250 3250
F 0 "C15" V 9998 3250 50  0000 C CNN
F 1 "56pF" V 10089 3250 50  0000 C CNN
F 2 "" H 10288 3100 50  0001 C CNN
F 3 "~" H 10250 3250 50  0001 C CNN
	1    10250 3250
	0    1    1    0   
$EndComp
Wire Wire Line
	10400 3050 10400 3150
$Comp
L power:GND #PWR023
U 1 1 6062D6FA
P 10500 3150
F 0 "#PWR023" H 10500 2900 50  0001 C CNN
F 1 "GND" H 10505 2977 50  0000 C CNN
F 2 "" H 10500 3150 50  0001 C CNN
F 3 "" H 10500 3150 50  0001 C CNN
	1    10500 3150
	1    0    0    -1  
$EndComp
Wire Wire Line
	10500 3150 10400 3150
Connection ~ 10400 3150
Wire Wire Line
	10400 3150 10400 3250
Wire Wire Line
	9850 3050 9850 3150
Wire Wire Line
	10100 3250 10100 3150
Wire Wire Line
	10100 3150 9850 3150
Connection ~ 10100 3150
Wire Wire Line
	10100 3150 10100 3050
Connection ~ 9850 3150
Wire Wire Line
	9850 3150 9850 3550
Text Notes 10000 3450 0    50   ~ 0
Smoothing caps
Wire Wire Line
	9350 4850 9350 4800
Text HLabel 9050 4800 0    50   Input ~ 0
IORQ
Wire Wire Line
	9050 4800 9350 4800
Connection ~ 9350 4800
Wire Wire Line
	9350 4800 9350 4750
Wire Wire Line
	8000 3750 8000 4250
Wire Wire Line
	8000 4250 9350 4250
Wire Wire Line
	7200 3750 8000 3750
Wire Wire Line
	8150 3650 8150 4350
Wire Wire Line
	8150 4350 9350 4350
Wire Wire Line
	7200 3650 8150 3650
Wire Wire Line
	8300 3550 8300 4450
Wire Wire Line
	8300 4450 9350 4450
Wire Wire Line
	7200 3550 8300 3550
Wire Wire Line
	8450 3450 8450 4150
Wire Wire Line
	8450 4150 9350 4150
Wire Wire Line
	7200 3450 8450 3450
Wire Wire Line
	8600 3350 8600 4050
Wire Wire Line
	8600 4050 9350 4050
Wire Wire Line
	7200 3350 8600 3350
NoConn ~ 7500 2950
NoConn ~ 7500 2850
NoConn ~ 7500 2750
NoConn ~ 7500 2650
NoConn ~ 7500 2550
NoConn ~ 7500 2450
NoConn ~ 7500 2350
NoConn ~ 9350 3850
NoConn ~ 9350 3950
NoConn ~ 10350 3850
NoConn ~ 10350 3950
Text HLabel 9050 4550 0    50   Input ~ 0
WR
Wire Wire Line
	9050 4550 9350 4550
Wire Wire Line
	10350 4050 14050 4050
Entry Wire Line
	14050 4050 14150 4150
Wire Wire Line
	10350 4150 14050 4150
Entry Wire Line
	14050 4150 14150 4250
Wire Wire Line
	10350 4250 14050 4250
Entry Wire Line
	14050 4250 14150 4350
Wire Wire Line
	10350 4350 14050 4350
Entry Wire Line
	14050 4350 14150 4450
Wire Wire Line
	10350 4450 14050 4450
Entry Wire Line
	14050 4450 14150 4550
Wire Wire Line
	10350 4550 14050 4550
Entry Wire Line
	14050 4550 14150 4650
Text Label 10450 4050 0    50   ~ 0
IOADDR4
Text Label 10450 4150 0    50   ~ 0
IOADDR3
Text Label 10450 4250 0    50   ~ 0
IOADDR2
Text Label 10450 4350 0    50   ~ 0
IOADDR1
Text Label 10450 4450 0    50   ~ 0
IOADDR0
Text Label 10450 4550 0    50   ~ 0
IOWR
$Comp
L power:GND #PWR026
U 1 1 6084A0EA
P 12350 7350
F 0 "#PWR026" H 12350 7100 50  0001 C CNN
F 1 "GND" H 12355 7177 50  0000 C CNN
F 2 "" H 12350 7350 50  0001 C CNN
F 3 "" H 12350 7350 50  0001 C CNN
	1    12350 7350
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR025
U 1 1 60853D75
P 12350 5250
F 0 "#PWR025" H 12350 5100 50  0001 C CNN
F 1 "VCC" H 12367 5423 50  0000 C CNN
F 2 "" H 12350 5250 50  0001 C CNN
F 3 "" H 12350 5250 50  0001 C CNN
	1    12350 5250
	1    0    0    -1  
$EndComp
$Comp
L Device:C C16
U 1 1 60853D7B
P 12750 5250
F 0 "C16" V 12498 5250 50  0000 C CNN
F 1 "100nF" V 12589 5250 50  0000 C CNN
F 2 "" H 12788 5100 50  0001 C CNN
F 3 "~" H 12750 5250 50  0001 C CNN
	1    12750 5250
	0    1    1    0   
$EndComp
$Comp
L Device:C C17
U 1 1 60853D81
P 12750 5450
F 0 "C17" V 12498 5450 50  0000 C CNN
F 1 "56pF" V 12589 5450 50  0000 C CNN
F 2 "" H 12788 5300 50  0001 C CNN
F 3 "~" H 12750 5450 50  0001 C CNN
	1    12750 5450
	0    1    1    0   
$EndComp
Wire Wire Line
	12900 5250 12900 5350
$Comp
L power:GND #PWR029
U 1 1 60853D88
P 13000 5350
F 0 "#PWR029" H 13000 5100 50  0001 C CNN
F 1 "GND" H 13005 5177 50  0000 C CNN
F 2 "" H 13000 5350 50  0001 C CNN
F 3 "" H 13000 5350 50  0001 C CNN
	1    13000 5350
	1    0    0    -1  
$EndComp
Wire Wire Line
	13000 5350 12900 5350
Connection ~ 12900 5350
Wire Wire Line
	12900 5350 12900 5450
Wire Wire Line
	12350 5250 12350 5350
Wire Wire Line
	12600 5450 12600 5350
Wire Wire Line
	12600 5350 12350 5350
Connection ~ 12600 5350
Wire Wire Line
	12600 5350 12600 5250
Connection ~ 12350 5350
Wire Wire Line
	12350 5350 12350 5750
Text Notes 12500 5650 0    50   ~ 0
Smoothing caps
Text HLabel 13150 6950 2    50   Input ~ 0
WR
Wire Wire Line
	12850 6950 13150 6950
Text HLabel 13150 7050 2    50   Input ~ 0
IORQ
Wire Wire Line
	12850 7050 13150 7050
$Comp
L 74xx:74HC245 U22
U 1 1 608489B5
P 12350 6550
F 0 "U22" H 12350 7531 50  0000 C CNN
F 1 "74HC245" H 12350 7440 50  0000 C CNN
F 2 "" H 12350 6550 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC245" H 12350 6550 50  0001 C CNN
	1    12350 6550
	-1   0    0    -1  
$EndComp
Entry Wire Line
	11450 5950 11550 6050
Wire Wire Line
	11550 6050 11850 6050
Entry Wire Line
	11450 6050 11550 6150
Wire Wire Line
	11550 6150 11850 6150
Entry Wire Line
	11450 6150 11550 6250
Wire Wire Line
	11550 6250 11850 6250
Entry Wire Line
	11450 6250 11550 6350
Wire Wire Line
	11550 6350 11850 6350
Entry Wire Line
	11450 6350 11550 6450
Wire Wire Line
	11550 6450 11850 6450
Entry Wire Line
	11450 6450 11550 6550
Wire Wire Line
	11550 6550 11850 6550
Entry Wire Line
	11450 6550 11550 6650
Wire Wire Line
	11550 6650 11850 6650
Entry Wire Line
	11450 6650 11550 6750
Wire Wire Line
	11550 6750 11850 6750
Wire Bus Line
	10350 5900 11450 5900
Connection ~ 10350 5900
Text Label 11550 6050 0    50   ~ 0
D0
Text Label 11550 6150 0    50   ~ 0
D1
Text Label 11550 6250 0    50   ~ 0
D2
Text Label 11550 6350 0    50   ~ 0
D3
Text Label 11550 6450 0    50   ~ 0
D4
Text Label 11550 6550 0    50   ~ 0
D5
Text Label 11550 6650 0    50   ~ 0
D6
Text Label 11550 6750 0    50   ~ 0
D7
Entry Wire Line
	14050 6050 14150 6150
Wire Wire Line
	14050 6050 12850 6050
Entry Wire Line
	14050 6150 14150 6250
Wire Wire Line
	14050 6150 12850 6150
Entry Wire Line
	14050 6250 14150 6350
Wire Wire Line
	14050 6250 12850 6250
Entry Wire Line
	14050 6350 14150 6450
Wire Wire Line
	14050 6350 12850 6350
Entry Wire Line
	14050 6450 14150 6550
Wire Wire Line
	14050 6450 12850 6450
Entry Wire Line
	14050 6550 14150 6650
Wire Wire Line
	14050 6550 12850 6550
Entry Wire Line
	14050 6650 14150 6750
Wire Wire Line
	14050 6650 12850 6650
Entry Wire Line
	14050 6750 14150 6850
Wire Wire Line
	14050 6750 12850 6750
Text Label 12900 6050 0    50   ~ 0
IOD0
Text Label 12900 6150 0    50   ~ 0
IOD1
Text Label 12900 6250 0    50   ~ 0
IOD2
Text Label 12900 6350 0    50   ~ 0
IOD3
Text Label 12900 6450 0    50   ~ 0
IOD4
Text Label 12900 6550 0    50   ~ 0
IOD5
Text Label 12900 6650 0    50   ~ 0
IOD6
Text Label 12900 6750 0    50   ~ 0
IOD7
Text Notes 11950 7750 0    50   ~ 0
I/O Data transceiver
$Comp
L power:GND #PWR010
U 1 1 60AC0139
P 4100 2600
F 0 "#PWR010" H 4100 2350 50  0001 C CNN
F 1 "GND" H 4105 2427 50  0000 C CNN
F 2 "" H 4100 2600 50  0001 C CNN
F 3 "" H 4100 2600 50  0001 C CNN
	1    4100 2600
	1    0    0    -1  
$EndComp
$Comp
L Device:C C7
U 1 1 60AC0A76
P 4100 2150
F 0 "C7" H 4215 2196 50  0000 L CNN
F 1 "470uF" H 4215 2105 50  0000 L CNN
F 2 "" H 4138 2000 50  0001 C CNN
F 3 "~" H 4100 2150 50  0001 C CNN
	1    4100 2150
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR09
U 1 1 60AC1A8F
P 4100 1650
F 0 "#PWR09" H 4100 1500 50  0001 C CNN
F 1 "VCC" H 4117 1823 50  0000 C CNN
F 2 "" H 4100 1650 50  0001 C CNN
F 3 "" H 4100 1650 50  0001 C CNN
	1    4100 1650
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 1650 4100 2000
Wire Wire Line
	4100 2300 4100 2600
Text Notes 2850 2850 0    50   ~ 0
Power input
$Comp
L Connector:Conn_01x02_Male J2
U 1 1 60AE4278
P 1950 2050
F 0 "J2" H 2058 2231 50  0000 C CNN
F 1 "Power input" H 2058 2140 50  0000 C CNN
F 2 "" H 1950 2050 50  0001 C CNN
F 3 "~" H 1950 2050 50  0001 C CNN
	1    1950 2050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR032
U 1 1 60AEC202
P 13700 2050
F 0 "#PWR032" H 13700 1800 50  0001 C CNN
F 1 "GND" H 13705 1877 50  0000 C CNN
F 2 "" H 13700 2050 50  0001 C CNN
F 3 "" H 13700 2050 50  0001 C CNN
	1    13700 2050
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR031
U 1 1 60AEC67F
P 13700 1550
F 0 "#PWR031" H 13700 1400 50  0001 C CNN
F 1 "VCC" H 13717 1723 50  0000 C CNN
F 2 "" H 13700 1550 50  0001 C CNN
F 3 "" H 13700 1550 50  0001 C CNN
	1    13700 1550
	1    0    0    -1  
$EndComp
$Comp
L Device:C C20
U 1 1 60AED147
P 13700 1800
F 0 "C20" H 13815 1846 50  0000 L CNN
F 1 "470uF" H 13815 1755 50  0000 L CNN
F 2 "" H 13738 1650 50  0001 C CNN
F 3 "~" H 13700 1800 50  0001 C CNN
	1    13700 1800
	1    0    0    -1  
$EndComp
Wire Wire Line
	13700 1550 13700 1600
Wire Wire Line
	13700 1950 13700 2000
Connection ~ 13700 2000
Wire Wire Line
	13700 2000 13700 2050
Connection ~ 13700 1600
Wire Wire Line
	13700 1600 13700 1650
Entry Wire Line
	14050 1600 14150 1700
Entry Wire Line
	14050 2000 14150 2100
Text Label 13750 1600 0    50   ~ 0
IOVCC
Text Label 13750 2000 0    50   ~ 0
IOGND
Wire Wire Line
	13700 2000 14050 2000
Wire Wire Line
	13700 1600 14050 1600
$Comp
L Regulator_Linear:LM7805_TO220 U30
U 1 1 60B8B756
P 3050 2000
F 0 "U30" H 3050 2242 50  0000 C CNN
F 1 "LM7805_TO220" H 3050 2151 50  0000 C CNN
F 2 "Package_TO_SOT_THT:TO-220-3_Vertical" H 3050 2225 50  0001 C CIN
F 3 "http://www.fairchildsemi.com/ds/LM/LM7805.pdf" H 3050 1950 50  0001 C CNN
	1    3050 2000
	1    0    0    -1  
$EndComp
$Comp
L Device:C C4
U 1 1 60B9FCED
P 2500 2150
F 0 "C4" H 2615 2196 50  0000 L CNN
F 1 "0,22uF" H 2615 2105 50  0000 L CNN
F 2 "" H 2538 2000 50  0001 C CNN
F 3 "~" H 2500 2150 50  0001 C CNN
	1    2500 2150
	1    0    0    -1  
$EndComp
$Comp
L Device:C C5
U 1 1 60BB291F
P 3600 2150
F 0 "C5" H 3715 2196 50  0000 L CNN
F 1 "0,1uF" H 3715 2105 50  0000 L CNN
F 2 "" H 3638 2000 50  0001 C CNN
F 3 "~" H 3600 2150 50  0001 C CNN
	1    3600 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 2000 2750 2000
Wire Wire Line
	3350 2000 3600 2000
Connection ~ 4100 2000
Connection ~ 3600 2000
Wire Wire Line
	3600 2000 4100 2000
Wire Wire Line
	2150 2150 2150 2300
Wire Wire Line
	2150 2300 2500 2300
Connection ~ 4100 2300
Connection ~ 2500 2300
Wire Wire Line
	2500 2300 3050 2300
Connection ~ 3050 2300
Wire Wire Line
	3050 2300 3600 2300
Connection ~ 3600 2300
Wire Wire Line
	3600 2300 4100 2300
Wire Wire Line
	2150 2050 2150 2000
Wire Wire Line
	2150 2000 2500 2000
Connection ~ 2500 2000
Wire Bus Line
	7800 5900 10350 5900
Wire Bus Line
	7800 7450 10350 7450
Wire Bus Line
	6000 8050 6000 9150
Wire Bus Line
	11450 5900 11450 6650
Wire Bus Line
	6000 6350 6000 7850
Wire Bus Line
	6550 7100 9000 7100
Wire Bus Line
	6550 8650 9000 8650
Wire Bus Line
	7100 2150 7100 3650
Wire Bus Line
	14150 1700 14150 7600
$EndSCHEMATC