Apple-2-HW
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RAM128
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EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr USLetter 11000 8500
encoding utf-8
Sheet 1 1
Title "RAM128"
Date "2020-09-11"
Rev "1.0"
Comp "Garrett's Workshop"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
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Text Label 5750 3350 2 50 ~ 0
A3
Text Label 5750 2850 2 50 ~ 0
~DEVSEL~
Wire Bus Line
5150 4150 6850 4150
Entry Wire Line
6750 3850 6850 3950
Entry Wire Line
6750 3750 6850 3850
Entry Wire Line
6750 3650 6850 3750
Wire Bus Line
950 4450 2250 4450
Wire Bus Line
2050 2300 5150 2300
$Comp
L power:GND #PWR0110
U 1 1 5D1550D4
P 4850 7100
F 0 "#PWR0110" H 4850 6850 50 0001 C CNN
F 1 "GND" H 4850 6950 50 0000 C CNN
F 2 "" H 4850 7100 50 0001 C CNN
F 3 "" H 4850 7100 50 0001 C CNN
1 4850 7100
1 0 0 -1
$EndComp
Connection ~ 4450 7100
$Comp
L GW_PLD:GAL22V10-PLCC U3
U 1 1 5E740F35
P 6150 3350
F 0 "U3" H 6150 4000 50 0000 C CNN
F 1 "GAL22V10" V 6150 3250 50 0000 C CNN
F 2 "stdpads:PLCC-28" H 6150 3300 50 0001 C CNN
F 3 "~" H 6150 3300 50 0001 C CNN
1 6150 3350
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR0113
U 1 1 5E752E93
P 6550 3950
F 0 "#PWR0113" H 6550 3700 50 0001 C CNN
F 1 "GND" H 6550 3800 50 0000 C CNN
F 2 "" H 6550 3950 50 0001 C CNN
F 3 "" H 6550 3950 50 0001 C CNN
1 6550 3950
1 0 0 -1
$EndComp
$Comp
L power:+5V #PWR0114
U 1 1 5E7548D5
P 6550 2850
F 0 "#PWR0114" H 6550 2700 50 0001 C CNN
F 1 "+5V" H 6550 3000 50 0000 C CNN
F 2 "" H 6550 2850 50 0001 C CNN
F 3 "" H 6550 2850 50 0001 C CNN
1 6550 2850
1 0 0 -1
$EndComp
Text Label 4050 3250 2 50 ~ 0
RD7
Text Label 4050 3350 2 50 ~ 0
RD6
Text Label 4050 3450 2 50 ~ 0
RD5
Text Label 4050 3550 2 50 ~ 0
RD4
Text Label 4850 4250 0 50 ~ 0
RA16
Text Label 4850 4050 0 50 ~ 0
RA15
Text Label 4850 3250 0 50 ~ 0
RA12
Text Label 4850 3350 0 50 ~ 0
A13
Text Label 4850 3850 0 50 ~ 0
RA14
Text Label 4850 2650 0 50 ~ 0
A6
Text Label 4850 2750 0 50 ~ 0
A7
Text Label 4850 3950 0 50 ~ 0
A3
Text Label 6550 3550 0 50 ~ 0
ENWR1
Entry Wire Line
6750 3450 6850 3550
Text Label 6550 3250 0 50 ~ 0
BankAB
Wire Wire Line
5250 3650 5750 3650
Wire Wire Line
5250 3750 5750 3750
Wire Wire Line
5250 3450 5750 3450
Wire Wire Line
5250 3550 5750 3550
Wire Wire Line
5250 3250 5750 3250
Wire Wire Line
5250 3350 5750 3350
Wire Wire Line
5250 3050 5750 3050
Wire Wire Line
5250 3150 5750 3150
Text Notes 5350 2850 0 50 ~ 0
(1)
Text Notes 5350 2950 0 50 ~ 0
(2)
Text Notes 5350 3050 0 50 ~ 0
(3)
Text Notes 5350 3150 0 50 ~ 0
(4)
Text Notes 5350 3250 0 50 ~ 0
(5)
Text Notes 5350 3350 0 50 ~ 0
(6)
Text Notes 5350 3450 0 50 ~ 0
(7)
Text Notes 5350 3550 0 50 ~ 0
(8)
Text Notes 5350 3650 0 50 ~ 0
(9)
Text Notes 5350 3750 0 50 ~ 0
(10)
Text Notes 5350 3850 0 50 ~ 0
(11)
Text Notes 5350 3950 0 50 ~ 0
(13)
Wire Wire Line
2850 7100 3250 7100
Connection ~ 3250 7100
Text Notes 6950 3850 0 50 ~ 0
(14)
Text Notes 6950 3750 0 50 ~ 0
(15)
Text Notes 6950 3650 0 50 ~ 0
(16)
Text Notes 6950 3550 0 50 ~ 0
(17)
Text Notes 6950 3450 0 50 ~ 0
(18)
Text Notes 6950 3350 0 50 ~ 0
(19)
Text Notes 6950 3250 0 50 ~ 0
(20)
Text Notes 6950 3150 0 50 ~ 0
(21)
Text Notes 6950 3050 0 50 ~ 0
(22)
Text Notes 6950 2950 0 50 ~ 0
(23)
$Comp
L power:+5V #PWR0112
U 1 1 5E66DD72
P 8450 3550
F 0 "#PWR0112" H 8450 3400 50 0001 C CNN
F 1 "+5V" H 8450 3700 50 0000 C CNN
F 2 "" H 8450 3550 50 0001 C CNN
F 3 "" H 8450 3550 50 0001 C CNN
1 8450 3550
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR0115
U 1 1 5E66E2A7
P 8450 4550
F 0 "#PWR0115" H 8450 4300 50 0001 C CNN
F 1 "GND" H 8450 4400 50 0000 C CNN
F 2 "" H 8450 4550 50 0001 C CNN
F 3 "" H 8450 4550 50 0001 C CNN
1 8450 4550
1 0 0 -1
$EndComp
$Comp
L 74xx:74LS125 U4
U 4 1 5E6CF07A
P 7500 4350
F 0 "U4" H 7450 4350 50 0000 C CNN
F 1 "74AHCT125" H 7450 4100 50 0000 R CNN
F 2 "stdpads:SOIC-14_3.9mm" H 7500 4350 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS125" H 7500 4350 50 0001 C CNN
4 7500 4350
1 0 0 -1
$EndComp
$Comp
L 74xx:74LS125 U4
U 3 1 5E6CFF48
P 7500 4850
F 0 "U4" H 7450 4850 50 0000 C CNN
F 1 "74AHCT125" H 7650 4800 50 0000 L CNN
F 2 "stdpads:SOIC-14_3.9mm" H 7500 4850 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS125" H 7500 4850 50 0001 C CNN
3 7500 4850
1 0 0 -1
$EndComp
$Comp
L power:+5V #PWR0116
U 1 1 5E6CB431
P 7900 4650
F 0 "#PWR0116" H 7900 4500 50 0001 C CNN
F 1 "+5V" H 7900 4800 50 0000 C CNN
F 2 "" H 7900 4650 50 0001 C CNN
F 3 "" H 7900 4650 50 0001 C CNN
1 7900 4650
1 0 0 -1
$EndComp
$Comp
L Device:R_Small R1
U 1 1 5E6C502A
P 7900 4750
F 0 "R1" H 7959 4796 50 0000 L CNN
F 1 "1k" H 7959 4705 50 0000 L CNN
F 2 "stdpads:R_0805" H 7900 4750 50 0001 C CNN
F 3 "~" H 7900 4750 50 0001 C CNN
1 7900 4750
1 0 0 -1
$EndComp
Text Label 8100 4850 0 50 ~ 0
~INH~
$Comp
L 74xx:74LS125 U4
U 1 1 5E64DA0F
P 7450 2950
F 0 "U4" H 7400 2950 50 0000 C CNN
F 1 "74AHCT125" H 7800 2900 50 0000 C CNN
F 2 "stdpads:SOIC-14_3.9mm" H 7450 2950 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS125" H 7450 2950 50 0001 C CNN
1 7450 2950
1 0 0 -1
$EndComp
$Comp
L 74xx:74LS125 U4
U 2 1 5E6CE65F
P 7500 3850
F 0 "U4" H 7450 3850 50 0000 C CNN
F 1 "74AHCT125" H 7450 3600 50 0000 R CNN
F 2 "stdpads:SOIC-14_3.9mm" H 7500 3850 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS125" H 7500 3850 50 0001 C CNN
2 7500 3850
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR0117
U 1 1 5E946D06
P 7450 3200
F 0 "#PWR0117" H 7450 2950 50 0001 C CNN
F 1 "GND" H 7450 3050 50 0000 C CNN
F 2 "" H 7450 3200 50 0001 C CNN
F 3 "" H 7450 3200 50 0001 C CNN
1 7450 3200
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR0119
U 1 1 5E95F71E
P 7700 3900
F 0 "#PWR0119" H 7700 3650 50 0001 C CNN
F 1 "GND" H 7700 3750 50 0000 C CNN
F 2 "" H 7700 3900 50 0001 C CNN
F 3 "" H 7700 3900 50 0001 C CNN
1 7700 3900
1 0 0 -1
$EndComp
Wire Wire Line
7700 3900 7600 3900
Wire Wire Line
7600 3900 7600 4100
Wire Wire Line
7600 4100 7500 4100
$Comp
L power:GND #PWR0121
U 1 1 5E965165
P 7700 4400
F 0 "#PWR0121" H 7700 4150 50 0001 C CNN
F 1 "GND" H 7700 4250 50 0000 C CNN
F 2 "" H 7700 4400 50 0001 C CNN
F 3 "" H 7700 4400 50 0001 C CNN
1 7700 4400
1 0 0 -1
$EndComp
Wire Wire Line
7700 4400 7600 4400
Wire Wire Line
7600 4400 7600 4600
Wire Wire Line
7600 4600 7500 4600
Wire Wire Line
7800 4150 7200 4150
Wire Wire Line
7800 4350 7800 4650
Wire Wire Line
7800 3850 7800 4150
Wire Wire Line
7200 4350 7200 4150
$Comp
L power:GND #PWR0122
U 1 1 5EA28AA9
P 7200 4850
F 0 "#PWR0122" H 7200 4600 50 0001 C CNN
F 1 "GND" H 7200 4700 50 0000 C CNN
F 2 "" H 7200 4850 50 0001 C CNN
F 3 "" H 7200 4850 50 0001 C CNN
1 7200 4850
1 0 0 -1
$EndComp
Wire Wire Line
7500 5100 7100 5100
Wire Wire Line
7100 5100 7100 4650
Wire Wire Line
7100 4650 7800 4650
Wire Wire Line
8100 4850 7900 4850
Connection ~ 7900 4850
Wire Wire Line
7900 4850 7800 4850
Wire Wire Line
6550 2950 7150 2950
Wire Wire Line
6550 3350 7200 3350
Wire Wire Line
7200 3350 7200 3850
Text Label 7950 2950 2 50 ~ 0
R~CS~
Wire Wire Line
7950 2950 7750 2950
$Comp
L 74xx:74LS125 U4
U 5 1 5E66D644
P 8450 4050
F 0 "U4" H 8450 4100 50 0000 C CNN
F 1 "74AHCT125" H 8450 4000 50 0000 C CNN
F 2 "stdpads:SOIC-14_3.9mm" H 8450 4050 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS125" H 8450 4050 50 0001 C CNN
5 8450 4050
1 0 0 -1
$EndComp
$Comp
L Device:C_Small C6
U 1 1 5E988E8B
P 4850 7000
F 0 "C6" H 4900 7050 50 0000 L CNN
F 1 "2u2" H 4900 6950 50 0000 L CNN
F 2 "stdpads:C_0805" H 4850 7000 50 0001 C CNN
F 3 "~" H 4850 7000 50 0001 C CNN
1 4850 7000
1 0 0 -1
$EndComp
Wire Wire Line
4450 6900 4850 6900
Wire Wire Line
4450 7100 4850 7100
Connection ~ 4850 7100
Wire Bus Line
6850 3550 6850 4150
Wire Bus Line
5150 3750 5150 4150
Wire Bus Line
950 3500 950 4450
Wire Bus Line
3750 2750 3750 3450
Wire Bus Line
2250 2950 2250 4450
Wire Bus Line
2050 2300 2050 4000
Wire Bus Line
5150 2300 5150 3650
$EndSCHEMATC
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