source: avrstuff/CPC stuff/gordon/ramcard.sch@ 87456c1

EESchema Schematic File Version 2  date 18/09/2012 23:05:56
LIBS:device
LIBS:power
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:74xx
LIBS:special
LIBS:interface
LIBS:contrib
LIBS:valves
LIBS:byteeeprom
LIBS:ramcard-cache
EELAYER 25  0
EELAYER END
$Descr User 10000 6000
encoding utf-8
Sheet 1 1
Title "Ramcard"
Date "18 sep 2012"
Rev ""
Comp "Ram7"
Comment1 "Retro analyzed from PCB"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text Notes 2550 1900 0    60   ~ 0
DSDP\nSWITCH
Text Label 3050 1650 0    60   ~ 0
RDWR
Wire Wire Line
        3200 1700 3200 1650
Wire Wire Line
        3200 1650 2900 1650
Wire Wire Line
        2250 2250 2350 2250
Wire Wire Line
        2250 1800 2350 1800
Wire Wire Line
        3400 2750 3650 2750
Wire Wire Line
        1850 900  2050 900 
Wire Wire Line
        2950 3600 2700 3600
Wire Wire Line
        4500 4450 4500 5250
Wire Wire Line
        4500 5250 4250 5250
Wire Wire Line
        3050 4350 3050 4500
Wire Wire Line
        3050 4500 4250 4500
Wire Wire Line
        4250 4500 4250 4800
Wire Wire Line
        5600 3550 4150 3550
Wire Wire Line
        1150 3100 1150 3300
Wire Wire Line
        7450 2650 7600 2650
Wire Wire Line
        7350 2850 7600 2850
Connection ~ 8650 4000
Wire Wire Line
        9300 4000 8300 4000
Wire Wire Line
        1350 2800 1350 2750
Connection ~ 1350 3300
Connection ~ 1150 3100
Wire Wire Line
        7100 3650 7100 3450
Wire Wire Line
        1150 3300 1650 3300
Connection ~ 9000 4400
Wire Wire Line
        9000 4550 9000 4400
Wire Wire Line
        6600 1100 6600 950 
Wire Wire Line
        7300 1100 7300 900 
Wire Wire Line
        6600 2100 6600 1900
Wire Bus Line
        6100 2200 5400 2200
Wire Wire Line
        6100 1900 6100 2050
Wire Wire Line
        6000 1900 6000 2050
Wire Wire Line
        5900 1900 5900 2050
Wire Wire Line
        5800 1900 5800 2050
Wire Wire Line
        5700 1900 5700 2050
Wire Wire Line
        5600 1900 5600 2050
Wire Wire Line
        5500 1900 5500 2050
Wire Wire Line
        5400 1900 5400 2050
Wire Wire Line
        6000 1100 6000 950 
Wire Wire Line
        5800 1100 5800 950 
Wire Wire Line
        5600 1100 5600 950 
Wire Wire Line
        5400 1100 5400 950 
Wire Wire Line
        6500 1100 6500 800 
Wire Wire Line
        6300 1100 6300 800 
Wire Bus Line
        6200 800  6500 800 
Wire Wire Line
        6200 1900 6200 2200
Wire Wire Line
        7400 2100 7400 1900
Wire Wire Line
        8300 3550 8500 3550
Wire Wire Line
        7100 3450 6800 3450
Wire Wire Line
        7700 1100 7700 950 
Wire Wire Line
        7500 1100 7500 950 
Wire Wire Line
        5300 1100 5300 950 
Wire Wire Line
        6700 1900 6700 2100
Wire Wire Line
        7100 1900 7100 2100
Wire Wire Line
        7300 1900 7300 2100
Wire Wire Line
        7600 1900 7600 2100
Wire Wire Line
        6900 2150 6900 1900
Wire Wire Line
        6800 2150 6800 1900
Wire Wire Line
        900  5400 900  5350
Wire Wire Line
        900  5350 1050 5350
Wire Wire Line
        2450 5050 2650 5050
Wire Wire Line
        2450 4850 2650 4850
Wire Wire Line
        2450 4750 2650 4750
Wire Wire Line
        2450 4950 2650 4950
Wire Wire Line
        2450 4350 2650 4350
Wire Wire Line
        2450 4450 2650 4450
Wire Wire Line
        2450 4550 2650 4550
Wire Wire Line
        2450 4650 2650 4650
Wire Wire Line
        900  5250 1050 5250
Wire Wire Line
        5950 2750 6150 2750
Wire Wire Line
        7700 1900 7700 2150
Wire Wire Line
        7700 2150 7800 2150
Wire Wire Line
        5950 2950 6150 2950
Wire Wire Line
        7500 1900 7500 2100
Wire Wire Line
        7200 1900 7200 2100
Wire Wire Line
        7000 1900 7000 2100
Wire Wire Line
        5300 1900 5300 2100
Wire Wire Line
        7400 1100 7400 950 
Wire Wire Line
        7600 1100 7600 950 
Wire Wire Line
        8900 3550 9050 3550
Wire Wire Line
        1050 4350 900  4350
Wire Wire Line
        1050 4450 900  4450
Wire Wire Line
        1050 4550 900  4550
Wire Wire Line
        1050 4650 900  4650
Wire Wire Line
        1050 4750 900  4750
Wire Wire Line
        1050 4850 900  4850
Wire Wire Line
        1050 4950 900  4950
Wire Wire Line
        1050 5050 900  5050
Connection ~ 2650 4350
Connection ~ 2650 4450
Connection ~ 2650 4550
Connection ~ 2650 4650
Connection ~ 2650 4750
Connection ~ 2650 4850
Connection ~ 2650 4950
Connection ~ 2650 5050
Wire Bus Line
        6200 2200 6500 2200
Wire Wire Line
        6300 1900 6300 2200
Wire Wire Line
        6400 1900 6400 2200
Wire Wire Line
        6500 1900 6500 2200
Wire Wire Line
        6200 1100 6200 800 
Wire Wire Line
        6400 1100 6400 800 
Wire Wire Line
        5500 1100 5500 950 
Wire Wire Line
        5700 1100 5700 950 
Wire Wire Line
        5900 1100 5900 950 
Wire Wire Line
        6100 1100 6100 950 
Wire Bus Line
        6100 750  5400 750 
Wire Wire Line
        8150 650  7950 650 
Wire Wire Line
        8150 750  7950 750 
Wire Wire Line
        8150 850  7950 850 
Wire Wire Line
        8150 950  7950 950 
Wire Wire Line
        8150 1050 7950 1050
Wire Wire Line
        8150 1150 7950 1150
Wire Wire Line
        8150 1250 7950 1250
Wire Wire Line
        8150 1350 7950 1350
Wire Wire Line
        8150 1450 7950 1450
Wire Wire Line
        8150 1550 7950 1550
Wire Wire Line
        8150 1650 7950 1650
Wire Wire Line
        8150 1750 7950 1750
Wire Wire Line
        8150 1850 7950 1850
Wire Wire Line
        8150 1950 7950 1950
Wire Wire Line
        8150 2050 7950 2050
Wire Wire Line
        8150 2150 7950 2150
Wire Wire Line
        8150 2250 7950 2250
Wire Wire Line
        8150 2350 7950 2350
Wire Wire Line
        8150 2450 7950 2450
Wire Bus Line
        900  5050 900  4350
Wire Wire Line
        6700 1100 6700 950 
Wire Wire Line
        6800 1100 6800 950 
Wire Wire Line
        6900 1100 6900 950 
Wire Wire Line
        7000 1100 7000 950 
Wire Wire Line
        7100 1100 7100 950 
Wire Wire Line
        7200 1100 7200 950 
Wire Wire Line
        9000 3950 9000 4000
Connection ~ 9000 4000
Connection ~ 7100 3650
Connection ~ 1650 3300
Wire Wire Line
        1350 2750 1550 2750
Wire Wire Line
        1550 2750 1550 2800
Wire Wire Line
        9300 4400 8300 4400
Connection ~ 8650 4400
Wire Wire Line
        8800 2750 9050 2750
Wire Wire Line
        5300 3350 5600 3350
Wire Wire Line
        2850 3400 2950 3400
Wire Wire Line
        2950 3500 2750 3500
Wire Wire Line
        4500 4250 4250 4250
Wire Wire Line
        5950 4350 5700 4350
Wire Wire Line
        2950 3700 2700 3700
Wire Wire Line
        3450 1050 3250 1050
Wire Wire Line
        2250 1600 2350 1600
Wire Wire Line
        2250 2100 2350 2100
Wire Wire Line
        2900 2150 3450 2150
Wire Wire Line
        3450 2150 3450 2750
Connection ~ 3450 2750
Text GLabel 2250 1600 0    60   Output ~ 0
ROMEN
Text GLabel 2250 1800 0    60   Output ~ 0
MREQ
$Comp
L GND #PWR?
U 1 1 5058E1E2
P 2250 2250
F 0 "#PWR?" H 2250 2250 30  0001 C CNN
F 1 "GND" H 2250 2180 30  0001 C CNN
        1    2250 2250
        0    1    1    0   
$EndComp
$Comp
L VCC #PWR?
U 1 1 5058E1DA
P 2250 2100
F 0 "#PWR?" H 2250 2200 30  0001 C CNN
F 1 "VCC" H 2250 2200 30  0000 C CNN
        1    2250 2100
        1    0    0    -1  
$EndComp
$Comp
L VCC #PWR?
U 1 1 5058E15E
P 2500 2750
F 0 "#PWR?" H 2500 2850 30  0001 C CNN
F 1 "VCC" H 2500 2850 30  0000 C CNN
        1    2500 2750
        1    0    0    -1  
$EndComp
$Comp
L R R?
U 1 1 5058E156
P 2750 2750
F 0 "R?" V 2830 2750 50  0000 C CNN
F 1 "1KR" V 2750 2750 50  0000 C CNN
        1    2750 2750
        0    -1   -1   0   
$EndComp
$Comp
L LED D?
U 1 1 5058E14C
P 3200 2750
F 0 "D?" H 3200 2850 50  0000 C CNN
F 1 "LED" H 3200 2650 50  0000 C CNN
        1    3200 2750
        1    0    0    -1  
$EndComp
$Comp
L R R?
U 1 1 5058E134
P 3900 2750
F 0 "R?" V 3980 2750 50  0000 C CNN
F 1 "220R" V 3900 2750 50  0000 C CNN
        1    3900 2750
        0    -1   -1   0   
$EndComp
Text GLabel 4150 2950 0    60   Output ~ 0
WR
Text Label 5350 2850 0    60   ~ 0
/WE
$Comp
L VCC #PWR?
U 1 1 5058E0FB
P 3450 1250
F 0 "#PWR?" H 3450 1350 30  0001 C CNN
F 1 "VCC" H 3450 1350 30  0000 C CNN
        1    3450 1250
        1    0    0    -1  
$EndComp
$Comp
L 74LS32 U3
U 4 1 5058E0E4
P 4750 2850
F 0 "U3" H 4750 2900 60  0000 C CNN
F 1 "74LS32" H 4750 2800 60  0000 C CNN
        4    4750 2850
        1    0    0    1   
$EndComp
Text Label 4450 1150 0    60   ~ 0
R7EN
Text Label 2700 3700 0    60   ~ 0
R7EN
Text Label 2700 3600 0    60   ~ 0
R0EN
Text Label 6950 4250 0    60   ~ 0
R0EN
$Comp
L VCC #PWR?
U 1 1 5058E067
P 5950 4150
F 0 "#PWR?" H 5950 4250 30  0001 C CNN
F 1 "VCC" H 5950 4250 30  0000 C CNN
        1    5950 4150
        1    0    0    -1  
$EndComp
$Comp
L SWITCH_INV SW?
U 1 1 5058E053
P 3950 1150
AR Path="/5058E041" Ref="SW?"  Part="1" 
AR Path="/5058E053" Ref="SW?"  Part="1" 
F 0 "SW?" H 3750 1300 50  0000 C CNN
F 1 "SWITCH_INV" H 3800 1000 50  0000 C CNN
        1    3950 1150
        -1   0    0    1   
$EndComp
$Comp
L SWITCH_INV SW?
U 1 1 5058E041
P 6450 4250
F 0 "SW?" H 6250 4400 50  0000 C CNN
F 1 "SWITCH_INV" H 6300 4100 50  0000 C CNN
        1    6450 4250
        -1   0    0    1   
$EndComp
$Comp
L 74LS32 U3
U 3 1 5058DF90
P 5100 4350
F 0 "U3" H 5100 4400 60  0000 C CNN
F 1 "74LS32" H 5100 4300 60  0000 C CNN
        3    5100 4350
        1    0    0    1   
$EndComp
Text Label 3050 4150 0    60   ~ 0
Q4
$Comp
L 74LS32 U2
U 2 1 5058DF56
P 3650 4250
F 0 "U2" H 3650 4300 60  0000 C CNN
F 1 "74LS32" H 3650 4200 60  0000 C CNN
        2    3650 4250
        1    0    0    1   
$EndComp
Text Label 3050 4700 0    60   ~ 0
Q3
Text Label 3050 4900 0    60   ~ 0
Q2
Text Label 3050 5150 0    60   ~ 0
Q1
Text Label 3050 5350 0    60   ~ 0
Q0
$Comp
L 74LS32 U3
U 2 1 5058DEFA
P 3650 5250
F 0 "U3" H 3650 5300 60  0000 C CNN
F 1 "74LS32" H 3650 5200 60  0000 C CNN
        2    3650 5250
        1    0    0    1   
$EndComp
$Comp
L 74LS32 U3
U 1 1 5058DD1C
P 3650 4800
F 0 "U3" H 3650 4850 60  0000 C CNN
F 1 "74LS32" H 3650 4750 60  0000 C CNN
        1    3650 4800
        1    0    0    1   
$EndComp
Text Label 2050 1200 0    60   ~ 0
Q2
Text Label 2050 1100 0    60   ~ 0
Q1
Text Label 2050 1000 0    60   ~ 0
Q0
Text Label 650  1000 0    60   ~ 0
Q4
Text Label 650  800  0    60   ~ 0
Q3
Text Label 2750 3500 0    60   ~ 0
A15
Text Label 1650 3500 0    60   ~ 0
Q5
Text Label 750  3300 0    60   ~ 0
Q7
Text Label 750  3100 0    60   ~ 0
Q6
$Comp
L 74LS20 U?
U 1 1 5058DC2F
P 3550 3550
AR Path="/5058DC2B" Ref="U?"  Part="1" 
AR Path="/5058DC2F" Ref="U5"  Part="1" 
F 0 "U5" H 3550 3650 60  0000 C CNN
F 1 "74LS20" H 3550 3450 60  0000 C CNN
        1    3550 3550
        1    0    0    -1  
$EndComp
$Comp
L 74LS20 U5
U 2 1 5058DC2B
P 2650 1050
F 0 "U5" H 2650 1150 60  0000 C CNN
F 1 "74LS20" H 2650 950 60  0000 C CNN
        2    2650 1050
        1    0    0    -1  
$EndComp
Text Label 5200 3550 0    60   ~ 0
ROMACC
Text Label 5300 3350 0    60   ~ 0
RDWR
$Comp
L 74LS02 U?
U 3 1 5058DBC7
P 2250 3400
AR Path="/5058DBC0" Ref="U?"  Part="1" 
AR Path="/5058DBC7" Ref="U4"  Part="3" 
F 0 "U4" H 2250 3450 60  0000 C CNN
F 1 "74LS02" H 2300 3350 60  0000 C CNN
        3    2250 3400
        1    0    0    -1  
$EndComp
$Comp
L 74LS02 U?
U 2 1 5058DBC5
P 1250 900
AR Path="/5058DBC0" Ref="U?"  Part="1" 
AR Path="/5058DBC5" Ref="U4"  Part="2" 
F 0 "U4" H 1250 950 60  0000 C CNN
F 1 "74LS02" H 1300 850 60  0000 C CNN
        2    1250 900 
        1    0    0    -1  
$EndComp
$Comp
L 74LS02 U4
U 4 1 5058DBC0
P 7700 3550
F 0 "U4" H 7700 3600 60  0000 C CNN
F 1 "74LS02" H 7750 3500 60  0000 C CNN
        4    7700 3550
        1    0    0    -1  
$EndComp
Text Label 9300 1800 0    60   ~ 0
/WE
Text GLabel 9300 1900 2    60   Output ~ 0
ROMEN
Text Label 7950 2450 0    60   ~ 0
Q4
Text Label 7950 2350 0    60   ~ 0
Q3
Text Label 7950 2250 0    60   ~ 0
Q2
Text Label 7950 2150 0    60   ~ 0
Q1
Text Label 7950 2050 0    60   ~ 0
Q0
$Comp
L VCC #PWR?
U 1 1 5058D352
P 8400 3050
F 0 "#PWR?" H 8400 3150 30  0001 C CNN
F 1 "VCC" H 8400 3150 30  0000 C CNN
        1    8400 3050
        1    0    0    -1  
$EndComp
$Comp
L R R?
U 1 1 5058D332
P 8400 3300
F 0 "R?" V 8480 3300 50  0000 C CNN
F 1 "1KR" V 8400 3300 50  0000 C CNN
        1    8400 3300
        -1   0    0    1   
$EndComp
Entry Wire Line
        6200 -250 6300 -150
$Comp
L 74LS574 U1
U 1 1 504C8586
P 1750 4850
F 0 "U1" H 1750 4850 60  0000 C CNN
F 1 "74LS574" H 1800 4500 60  0000 C CNN
        1    1750 4850
        1    0    0    -1  
$EndComp
$Comp
L 29C040 U6
U 1 1 504C83A0
P 8750 1550
F 0 "U6" H 8750 1550 60  0000 C CNN
F 1 "29C040" V 8700 2100 60  0000 C CNN
        1    8750 1550
        1    0    0    -1  
$EndComp
Text Label 7450 2650 0    60   ~ 0
A13
Text Label 9300 2000 0    60   ~ 0
/CE
Text Label 6950 3450 0    60   ~ 0
CE
$Comp
L VCC #PWR01
U 1 1 4DDEB8E8
P 9300 2350
F 0 "#PWR01" H 9300 2450 30  0001 C CNN
F 1 "VCC" H 9300 2450 30  0000 C CNN
        1    9300 2350
        0    1    1    0   
$EndComp
Text Label 6800 950  1    60   ~ 0
RD
$Comp
L GND #PWR02
U 1 1 4DC04C38
P 1550 2800
F 0 "#PWR02" H 1550 2800 30  0001 C CNN
F 1 "GND" H 1550 2730 30  0001 C CNN
        1    1550 2800
        1    0    0    -1  
$EndComp
Text Label 2650 4750 0    60   ~ 0
Q4
$Comp
L DIODE D11
U 1 1 4DBD84F1
P 950 3300
F 0 "D11" H 950 3400 40  0000 C CNN
F 1 "DIODE" H 950 3200 40  0000 C CNN
        1    950  3300
        1    0    0    1   
$EndComp
$Comp
L DIODE D2
U 1 1 4DBD84E4
P 950 3100
F 0 "D2" H 950 3200 40  0000 C CNN
F 1 "DIODE" H 950 3000 40  0000 C CNN
        1    950  3100
        1    0    0    1   
$EndComp
$Comp
L GND #PWR03
U 1 1 4DBD3AB8
P 9000 4550
F 0 "#PWR03" H 9000 4550 30  0001 C CNN
F 1 "GND" H 9000 4480 30  0001 C CNN
        1    9000 4550
        1    0    0    -1  
$EndComp
$Comp
L VCC #PWR04
U 1 1 4DBD3AB1
P 9000 3950
F 0 "#PWR04" H 9000 4050 30  0001 C CNN
F 1 "VCC" H 9000 4050 30  0000 C CNN
        1    9000 3950
        1    0    0    -1  
$EndComp
Text GLabel 6600 950  1    60   Output ~ 0
MREQ
NoConn ~ 7200 950 
NoConn ~ 7100 950 
NoConn ~ 7000 950 
NoConn ~ 6900 950 
NoConn ~ 6700 950 
Text GLabel 7300 900  1    60   Output ~ 0
ROMEN
Text Label 2650 5050 0    60   ~ 0
Q7
Text Label 2650 4350 0    60   ~ 0
Q0
Text Label 2650 4950 0    60   ~ 0
Q6
Text Label 2650 4450 0    60   ~ 0
Q1
Text Label 2650 4550 0    60   ~ 0
Q2
Text Label 2650 4850 0    60   ~ 0
Q5
Text Label 2650 4650 0    60   ~ 0
Q3
$Comp
L VCC #PWR05
U 1 1 4DBBEA82
P 6600 2100
F 0 "#PWR05" H 6600 2200 30  0001 C CNN
F 1 "VCC" H 6600 2200 30  0000 C CNN
        1    6600 2100
        -1   0    0    1   
$EndComp
Text Label 7950 1950 0    60   ~ 0
A13
Text Label 7950 1850 0    60   ~ 0
A12
Text Label 7950 1750 0    60   ~ 0
A11
Text Label 7950 1650 0    60   ~ 0
A10
Text Label 7950 1550 0    60   ~ 0
A9
Text Label 7950 1450 0    60   ~ 0
A8
Text Label 7950 1350 0    60   ~ 0
A7
Text Label 7950 1250 0    60   ~ 0
A6
Text Label 7950 1150 0    60   ~ 0
A5
Text Label 7950 1050 0    60   ~ 0
A4
Text Label 7950 950  0    60   ~ 0
A3
Text Label 7950 850  0    60   ~ 0
A2
Text Label 7950 750  0    60   ~ 0
A1
Text Label 7950 650  0    60   ~ 0
A0
Text Label 5400 2050 1    60   ~ 0
A15
Text Label 5400 950  1    60   ~ 0
A14
Text Label 5500 2050 1    60   ~ 0
A13
Text Label 5500 950  1    60   ~ 0
A12
Text Label 5600 2050 1    60   ~ 0
A11
Text Label 5600 950  1    60   ~ 0
A10
Text Label 5700 2050 1    60   ~ 0
A9
Text Label 5700 950  1    60   ~ 0
A8
Text Label 5800 2050 1    60   ~ 0
A7
Text Label 5800 950  1    60   ~ 0
A6
Text Label 5900 2050 1    60   ~ 0
A5
Text Label 5900 950  1    60   ~ 0
A4
Text Label 6000 2050 1    60   ~ 0
A3
Text Label 6000 950  1    60   ~ 0
A2
Text Label 6100 2050 1    60   ~ 0
A1
Text Label 6100 950  1    60   ~ 0
A0
Text Label 1000 5050 0    60   ~ 0
D7
Text Label 1000 4950 0    60   ~ 0
D6
Text Label 1000 4850 0    60   ~ 0
D5
Text Label 1000 4750 0    60   ~ 0
D4
Text Label 1000 4650 0    60   ~ 0
D3
Text Label 1000 4550 0    60   ~ 0
D2
Text Label 1000 4450 0    60   ~ 0
D1
Text Label 1000 4350 0    60   ~ 0
D0
Entry Wire Line
        6500 800  6400 700 
Entry Wire Line
        6400 800  6300 700 
Entry Wire Line
        6300 800  6200 700 
Entry Wire Line
        6200 800  6100 700 
Entry Wire Line
        6500 2200 6400 2100
Entry Wire Line
        6400 2200 6300 2100
Entry Wire Line
        6300 2200 6200 2100
Entry Wire Line
        6200 2200 6100 2100
Text Label 6200 2100 1    60   ~ 0
D7
Text Label 6300 2100 1    60   ~ 0
D5
Text Label 6400 2100 1    60   ~ 0
D3
Text Label 6500 2100 1    60   ~ 0
D1
Text Label 6200 950  1    60   ~ 0
D6
Text Label 6300 950  1    60   ~ 0
D4
Text Label 6400 950  1    60   ~ 0
D2
Text Label 6500 950  1    60   ~ 0
D0
$Comp
L GND #PWR06
U 1 1 4DBBE106
P 9300 2450
F 0 "#PWR06" H 9300 2450 30  0001 C CNN
F 1 "GND" H 9300 2380 30  0001 C CNN
        1    9300 2450
        0    -1   -1   0   
$EndComp
Text GLabel 7400 2100 3    60   Input ~ 0
ROMDIS
Text Label 9300 1350 0    60   ~ 0
D7
Text Label 9300 1250 0    60   ~ 0
D6
Text Label 9300 1150 0    60   ~ 0
D5
Text Label 9300 1050 0    60   ~ 0
D4
Text Label 9300 950  0    60   ~ 0
D3
Text Label 9300 850  0    60   ~ 0
D2
Text Label 9300 750  0    60   ~ 0
D1
Text Label 9300 650  0    60   ~ 0
D0
Text Notes 1600 5050 0    60   ~ 0
register
Text Notes 6700 3200 0    60   ~ 0
Rom active notification
Text GLabel 9050 3550 2    60   Output ~ 0
ROMDIS
NoConn ~ 7400 950 
NoConn ~ 7500 950 
NoConn ~ 7600 950 
NoConn ~ 7700 950 
NoConn ~ 5300 950 
NoConn ~ 5300 2100
NoConn ~ 6700 2100
NoConn ~ 7000 2100
NoConn ~ 7100 2100
NoConn ~ 7200 2100
NoConn ~ 7300 2100
NoConn ~ 7500 2100
NoConn ~ 7600 2100
Text Notes 5050 2350 1    60   ~ 0
\ncpc connector
Text Notes 5650 2600 0    60   ~ 0
OUT Decoder
Text GLabel 5950 2950 0    60   Input ~ 0
WR
Text GLabel 6900 2150 3    60   Output ~ 0
WR
$Comp
L GND #PWR07
U 1 1 4CA89326
P 7800 2150
F 0 "#PWR07" H 7800 2150 30  0001 C CNN
F 1 "GND" H 7800 2080 30  0001 C CNN
        1    7800 2150
        0    -1   -1   0   
$EndComp
Text GLabel 6800 2150 3    60   Output ~ 0
IORQ
Text GLabel 5950 2750 0    60   Input ~ 0
IORQ
$Comp
L 74LS32 U2
U 4 1 4CA89162
P 6750 2850
F 0 "U2" H 6750 2900 60  0000 C CNN
F 1 "74LS32" H 6750 2800 60  0000 C CNN
        4    6750 2850
        1    0    0    -1  
$EndComp
Text GLabel 9050 2750 2    60   Output ~ 0
ROMSEL
Text GLabel 900  5250 0    60   Input ~ 0
ROMSEL
$Comp
L 74LS32 U2
U 3 1 4CA89099
P 8200 2750
F 0 "U2" H 8200 2800 60  0000 C CNN
F 1 "74LS32" H 8200 2700 60  0000 C CNN
        3    8200 2750
        1    0    0    1   
$EndComp
$Comp
L GND #PWR08
U 1 1 4CA88AFC
P 900 5400
F 0 "#PWR08" H 900 5400 30  0001 C CNN
F 1 "GND" H 900 5330 30  0001 C CNN
        1    900  5400
        1    0    0    -1  
$EndComp
Text Notes 1150 4200 0    60   ~ 0
Current ROM number storage
Text Notes 600  2750 0    60   ~ 0
comparator
$Comp
L 74LS32 U2
U 1 1 4CA87CE5
P 6200 3450
F 0 "U2" H 6200 3500 60  0000 C CNN
F 1 "74LS32" H 6200 3400 60  0000 C CNN
        1    6200 3450
        1    0    0    1   
$EndComp
$Comp
L C C4
U 1 1 4CA87152
P 9300 4200
F 0 "C4" H 9350 4300 50  0000 L CNN
F 1 "C" H 9350 4100 50  0000 L CNN
        1    9300 4200
        1    0    0    -1  
$EndComp
$Comp
L C C3
U 1 1 4CA87151
P 9000 4200
F 0 "C3" H 9050 4300 50  0000 L CNN
F 1 "C" H 9050 4100 50  0000 L CNN
        1    9000 4200
        1    0    0    -1  
$EndComp
$Comp
L CP1 C5
U 1 1 4CA87146
P 8650 4200
F 0 "C5" H 8700 4300 50  0000 L CNN
F 1 "CP1" H 8700 4100 50  0000 L CNN
        1    8650 4200
        1    0    0    -1  
$EndComp
$Comp
L CONN_25X2 P1
U 1 1 4CA8712F
P 6500 1500
F 0 "P1" H 6500 2800 60  0000 C CNN
F 1 "CONN_25X2" V 6500 1500 50  0000 C CNN
        1    6500 1500
        0    -1   -1   0   
$EndComp
$Comp
L C C2
U 1 1 4CA870EF
P 8300 4200
F 0 "C2" H 8350 4300 50  0000 L CNN
F 1 "C" H 8350 4100 50  0000 L CNN
        1    8300 4200
        1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 4CA870D9
P 1350 3050
F 0 "R2" V 1430 3050 50  0000 C CNN
F 1 "1KR" V 1350 3050 50  0000 C CNN
        1    1350 3050
        -1   0    0    1   
$EndComp
$Comp
L DIODE D13
U 1 1 4CA870AA
P 8700 3550
F 0 "D13" H 8700 3650 40  0000 C CNN
F 1 "DIODE" H 8700 3450 40  0000 C CNN
        1    8700 3550
        1    0    0    -1  
$EndComp
$EndSCHEMATC