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Version 1.0
2019-11-11 12:15:16 -06:00
EESchema Schematic File Version 4
LIBS:motherboard-cache
EELAYER 29 0
EELAYER END
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$Comp
L power:+5V #PWR?
U 1 1 5D8C1F34
P 4450 850
AR Path="/5D847EA3/5D8C1F34" Ref="#PWR?" Part="1"
AR Path="/5D81BA5C/5D8C1F34" Ref="#PWR041" Part="1"
F 0 "#PWR041" H 4450 700 50 0001 C CNN
F 1 "+5V" H 4465 1023 50 0000 C CNN
F 2 "" H 4450 850 50 0001 C CNN
F 3 "" H 4450 850 50 0001 C CNN
1 4450 850
1 0 0 -1
$EndComp
$Comp
L 74xx:74LS688 U?
U 1 1 5D8CB7B8
P 4450 4850
AR Path="/5D8CB7B8" Ref="U?" Part="1"
AR Path="/5D847EA3/5D8CB7B8" Ref="U?" Part="1"
AR Path="/5D81BA5C/5D8CB7B8" Ref="U9" Part="1"
F 0 "U9" H 4600 6000 50 0000 L CNN
F 1 "74LS688" H 4500 5900 50 0000 L CNN
F 2 "Package_DIP:DIP-20_W7.62mm_Socket" H 4450 4850 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS688" H 4450 4850 50 0001 C CNN
1 4450 4850
1 0 0 -1
$EndComp
Text Label 4950 1150 0 50 ~ 0
PORT2
Text Label 4950 3950 0 50 ~ 0
PORT4
$Comp
L power:GND #PWR?
U 1 1 5D8C1F17
P 3600 2950
AR Path="/5D8C1F17" Ref="#PWR?" Part="1"
AR Path="/5D847EA3/5D8C1F17" Ref="#PWR?" Part="1"
AR Path="/5D81BA5C/5D8C1F17" Ref="#PWR039" Part="1"
F 0 "#PWR039" H 3600 2700 50 0001 C CNN
F 1 "GND" H 3605 2777 50 0000 C CNN
F 2 "" H 3600 2950 50 0001 C CNN
F 3 "" H 3600 2950 50 0001 C CNN
1 3600 2950
1 0 0 -1
$EndComp
Wire Wire Line
3600 2950 3600 2750
Wire Wire Line
3600 2750 3950 2750
Wire Wire Line
3950 2650 3600 2650
Wire Wire Line
3600 2650 3600 2750
Connection ~ 3600 2750
Wire Wire Line
3950 2550 3600 2550
Wire Wire Line
3600 2550 3600 2650
Connection ~ 3600 2650
Wire Wire Line
3950 2450 3600 2450
Wire Wire Line
3600 2450 3600 2550
Connection ~ 3600 2550
Wire Wire Line
3600 2450 3600 2350
Wire Wire Line
3600 1850 3950 1850
Connection ~ 3600 2450
Wire Wire Line
3950 1750 3600 1750
Wire Wire Line
3600 1750 3600 1850
Connection ~ 3600 1850
Wire Wire Line
3600 1650 3600 1750
Wire Wire Line
3600 1650 3950 1650
Connection ~ 3600 1750
Wire Wire Line
3950 1550 3600 1550
Wire Wire Line
3600 1550 3600 1650
Connection ~ 3600 1650
Text GLabel 3950 4250 0 50 Input ~ 0
A4
Text GLabel 3950 4150 0 50 Input ~ 0
A5
Text GLabel 3950 4050 0 50 Input ~ 0
A6
Text GLabel 3950 3950 0 50 Input ~ 0
A7
$Comp
L power:GND #PWR?
U 1 1 5D8CB795
P 3600 5750
AR Path="/5D8CB795" Ref="#PWR?" Part="1"
AR Path="/5D847EA3/5D8CB795" Ref="#PWR?" Part="1"
AR Path="/5D81BA5C/5D8CB795" Ref="#PWR040" Part="1"
F 0 "#PWR040" H 3600 5500 50 0001 C CNN
F 1 "GND" H 3605 5577 50 0000 C CNN
F 2 "" H 3600 5750 50 0001 C CNN
F 3 "" H 3600 5750 50 0001 C CNN
1 3600 5750
1 0 0 -1
$EndComp
Wire Wire Line
3600 5750 3600 5550
Wire Wire Line
3600 5550 3950 5550
Wire Wire Line
3950 5450 3600 5450
Wire Wire Line
3600 5450 3600 5550
Connection ~ 3600 5550
Wire Wire Line
3950 5350 3600 5350
Wire Wire Line
3600 5350 3600 5450
Connection ~ 3600 5450
Wire Wire Line
3950 5250 3600 5250
Wire Wire Line
3600 5250 3600 5350
Connection ~ 3600 5350
Wire Wire Line
3600 5250 3600 5150
Wire Wire Line
3600 4650 3950 4650
Connection ~ 3600 5250
Wire Wire Line
3950 4550 3600 4550
Wire Wire Line
3600 4550 3600 4650
Connection ~ 3600 4650
Wire Wire Line
3600 4450 3600 4550
Wire Wire Line
3600 4450 3950 4450
Connection ~ 3600 4550
Wire Wire Line
3950 4350 3600 4350
Wire Wire Line
3600 4350 3600 4450
Connection ~ 3600 4450
Text GLabel 3950 1150 0 50 Input ~ 0
A7
Text GLabel 3950 1250 0 50 Input ~ 0
A6
Text GLabel 3950 1350 0 50 Input ~ 0
A5
Text GLabel 3950 1450 0 50 Input ~ 0
A4
Text Label 2350 3900 0 50 ~ 0
PORT3
Wire Wire Line
3400 2250 3950 2250
Wire Wire Line
3950 2350 3600 2350
Connection ~ 3600 2350
Wire Wire Line
3950 2150 3600 2150
Connection ~ 3600 2150
Wire Wire Line
3600 2150 3600 2050
Wire Wire Line
3950 2050 3600 2050
Connection ~ 3600 2050
Wire Wire Line
3600 2050 3600 1850
Wire Wire Line
3450 4950 3950 4950
Wire Wire Line
3950 5050 3600 5050
Connection ~ 3600 5050
Wire Wire Line
3600 5050 3600 4850
Wire Wire Line
3600 5150 3950 5150
Connection ~ 3600 5150
Wire Wire Line
3600 5150 3600 5050
Wire Wire Line
3950 4850 3600 4850
Connection ~ 3600 4850
Wire Wire Line
3600 4850 3600 4650
$Comp
L power:+5V #PWR?
U 1 1 5D8CB760
P 3450 4950
AR Path="/5D8CB760" Ref="#PWR?" Part="1"
AR Path="/5D847EA3/5D8CB760" Ref="#PWR?" Part="1"
AR Path="/5D81BA5C/5D8CB760" Ref="#PWR038" Part="1"
F 0 "#PWR038" H 3450 4800 50 0001 C CNN
F 1 "+5V" H 3465 5123 50 0000 C CNN
F 2 "" H 3450 4950 50 0001 C CNN
F 3 "" H 3450 4950 50 0001 C CNN
1 3450 4950
1 0 0 -1
$EndComp
$Comp
L power:+5V #PWR037
U 1 1 5D9B2717
P 3400 2250
F 0 "#PWR037" H 3400 2100 50 0001 C CNN
F 1 "+5V" H 3415 2423 50 0000 C CNN
F 2 "" H 3400 2250 50 0001 C CNN
F 3 "" H 3400 2250 50 0001 C CNN
1 3400 2250
1 0 0 -1
$EndComp
Wire Wire Line
3600 2150 3600 2350
Text GLabel 7350 1800 2 50 Input ~ 0
~IORQ
Text Label 9450 1750 0 50 ~ 0
PORT2
Text GLabel 9450 1850 2 50 Input ~ 0
~IORQ
Text Label 7300 3650 0 50 ~ 0
PORT3
Text GLabel 7300 3750 2 50 Input ~ 0
~IORQ
Text GLabel 7300 3850 2 50 Input ~ 0
~RESET
Text Label 9450 3750 0 50 ~ 0
PORT4
Text GLabel 9450 3950 2 50 Input ~ 0
~RESET
Text GLabel 9450 3850 2 50 Input ~ 0
~IORQ
Text GLabel 3950 2950 0 50 Input ~ 0
~IORQ
Text GLabel 1350 2900 0 50 Input ~ 0
~IORQ
Text GLabel 3950 5750 0 50 Input ~ 0
~IORQ
Text GLabel 1350 5700 0 50 Input ~ 0
~IORQ
$EndSCHEMATC
Reference in New Issue Copy Permalink