EESchema Schematic File Version 2  date 01/05/2011 14:51:06
LIBS:device
LIBS:power
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:74xx
LIBS:special
LIBS:interface
LIBS:contrib
LIBS:valves
LIBS:dips-s
LIBS:flashmemory
LIBS:ramcard-cache
EELAYER 25  0
EELAYER END
$Descr User 11000 8000
encoding utf-8
Sheet 1 1
Title "Ramcard"
Date "1 may 2011"
Rev ""
Comp "Ram7"
Comment1 "Retro analyzed from PCB"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text GLabel 6850 3850 2    60   Output ~ 0
WRITE
Text Label 8400 2400 0    60   ~ 0
IS2
Text Label 8400 2300 0    60   ~ 0
IS0
Text Label 8400 2500 0    60   ~ 0
IS1
NoConn ~ 8000 5250
Wire Wire Line
	6800 5350 6800 5550
Connection ~ 8900 5750
Wire Wire Line
	8550 5750 9200 5750
Connection ~ 1050 3350
Wire Wire Line
	8900 5750 8900 5900
Connection ~ 3450 2650
Wire Wire Line
	3650 2650 3650 2550
Wire Wire Line
	3650 2550 3450 2550
Wire Wire Line
	3450 2550 3450 2750
Wire Wire Line
	5950 2100 6100 2100
Wire Wire Line
	2050 2950 2000 2950
Wire Wire Line
	2050 2750 2000 2750
Wire Wire Line
	1550 2850 1800 2850
Wire Wire Line
	7750 1650 7450 1650
Connection ~ 7750 1650
Wire Wire Line
	3400 6350 3400 6250
Wire Wire Line
	3900 5850 4000 5850
Wire Wire Line
	4850 6250 4850 6350
Wire Wire Line
	5950 2800 6150 2800
Wire Bus Line
	2650 4550 2650 4350
Wire Wire Line
	4950 2100 5150 2100
Wire Bus Line
	4850 1600 4850 900 
Wire Wire Line
	5150 1600 5000 1600
Wire Wire Line
	5150 1500 5000 1500
Wire Wire Line
	5150 1400 5000 1400
Wire Wire Line
	5150 1300 5000 1300
Wire Wire Line
	5150 1200 5000 1200
Wire Wire Line
	5150 1100 5000 1100
Wire Wire Line
	5150 1000 5000 1000
Wire Wire Line
	5150 900  5000 900 
Wire Wire Line
	5950 1500 6100 1500
Wire Wire Line
	5950 1300 6100 1300
Wire Wire Line
	5950 1100 6100 1100
Wire Wire Line
	5950 900  6100 900 
Wire Wire Line
	5950 2000 6250 2000
Wire Wire Line
	5950 1800 6250 1800
Wire Bus Line
	6250 1700 6250 2000
Wire Wire Line
	5150 1700 4850 1700
Connection ~ 1600 2650
Connection ~ 1550 3600
Wire Wire Line
	5200 3950 5350 3950
Connection ~ 3850 2850
Wire Wire Line
	9300 3250 9300 3350
Wire Wire Line
	4950 2900 5150 2900
Wire Bus Line
	10300 1750 10300 650 
Connection ~ 7600 1650
Wire Wire Line
	7600 1500 7600 1650
Connection ~ 7450 2150
Wire Wire Line
	7750 2150 7450 2150
Connection ~ 6950 2700
Wire Wire Line
	6950 2300 6950 3150
Connection ~ 7150 3150
Wire Wire Line
	6950 3150 7250 3150
Wire Wire Line
	7150 3300 7150 3150
Wire Bus Line
	800  900  800  1100
Wire Wire Line
	3850 2200 3850 2350
Wire Wire Line
	6200 5350 6500 5350
Wire Wire Line
	5000 5450 5000 5250
Wire Notes Line
	450  1900 4550 1900
Wire Notes Line
	7450 4100 7450 3450
Wire Notes Line
	7450 3450 6800 3450
Wire Wire Line
	5200 4350 5300 4350
Wire Wire Line
	8000 4550 8200 4550
Wire Wire Line
	6500 4450 6800 4450
Wire Wire Line
	950  1600 1050 1600
Wire Bus Line
	2900 6750 3100 6750
Wire Wire Line
	2250 7150 2450 7150
Wire Wire Line
	950  7050 1050 7050
Wire Wire Line
	5950 3200 6100 3200
Wire Wire Line
	5950 3000 6100 3000
Wire Wire Line
	5950 800  6100 800 
Wire Wire Line
	5150 2200 4950 2200
Wire Wire Line
	5150 2600 4950 2600
Wire Wire Line
	5150 2800 4950 2800
Wire Wire Line
	5150 3100 4950 3100
Wire Wire Line
	1100 5850 1000 5850
Wire Wire Line
	4900 2400 5150 2400
Wire Wire Line
	4900 2300 5150 2300
Wire Wire Line
	1100 6050 1100 6200
Wire Wire Line
	1100 6200 2300 6200
Wire Wire Line
	2300 6200 2300 6500
Wire Wire Line
	2300 5950 2450 5950
Wire Notes Line
	4450 4050 350  4050
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
	2050 3450 1850 3450
Wire Wire Line
	2050 3250 1850 3250
Wire Wire Line
	8300 3000 8600 3000
Connection ~ 1800 2150
Wire Wire Line
	1800 2350 1800 2150
Wire Wire Line
	1900 2450 1900 2150
Wire Wire Line
	1900 2150 1600 2150
Wire Wire Line
	1550 2750 1700 2750
Connection ~ 1150 2750
Wire Wire Line
	1150 2650 1150 2950
Connection ~ 3800 1600
Wire Wire Line
	3800 1500 3800 1600
Wire Wire Line
	950  1400 1050 1400
Wire Wire Line
	1550 2950 1900 2950
Wire Wire Line
	2250 1600 2400 1600
Wire Wire Line
	2250 1400 2400 1400
Wire Wire Line
	2250 1200 2400 1200
Wire Wire Line
	2250 1000 2400 1000
Connection ~ 3550 1500
Wire Wire Line
	3550 900  3550 1600
Connection ~ 3550 1300
Connection ~ 3550 1100
Wire Wire Line
	2800 1500 3150 1500
Wire Wire Line
	2800 1300 3150 1300
Wire Wire Line
	2800 1100 3150 1100
Wire Wire Line
	2800 900  3150 900 
Wire Wire Line
	2800 1000 3150 1000
Wire Wire Line
	2800 1200 3150 1200
Wire Wire Line
	2800 1400 3150 1400
Wire Wire Line
	2800 1600 3150 1600
Connection ~ 3550 1000
Connection ~ 3550 1200
Connection ~ 3550 1400
Wire Wire Line
	2250 900  2400 900 
Wire Wire Line
	2250 1100 2400 1100
Wire Wire Line
	2250 1300 2400 1300
Wire Wire Line
	2250 1500 2400 1500
Wire Wire Line
	3450 3450 3650 3450
Wire Wire Line
	3550 1600 3950 1600
Wire Wire Line
	3800 1000 3800 850 
Connection ~ 1150 2850
Wire Wire Line
	1150 2800 900  2800
Wire Wire Line
	900  2800 900  2850
Connection ~ 1150 2800
Wire Wire Line
	1550 2650 1600 2650
Wire Wire Line
	1700 2250 1700 2150
Connection ~ 1700 2150
Wire Wire Line
	1850 2150 1850 2050
Connection ~ 1850 2150
Wire Wire Line
	2050 3150 1850 3150
Wire Wire Line
	2050 3350 1850 3350
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 Notes Line
	4550 450  4550 5550
Wire Notes Line
	4550 5550 450  5550
Wire Wire Line
	900  5250 1050 5250
Wire Wire Line
	900  6400 1100 6400
Wire Wire Line
	5150 3200 4900 3200
Wire Wire Line
	4900 3200 4900 3300
Wire Wire Line
	900  6600 1100 6600
Wire Notes Line
	2900 6750 450  6750
Wire Wire Line
	5150 3000 4950 3000
Wire Wire Line
	5150 2700 4950 2700
Wire Wire Line
	5150 2500 4950 2500
Wire Wire Line
	5150 800  4950 800 
Wire Wire Line
	5950 2900 6100 2900
Wire Wire Line
	5950 3100 6100 3100
Wire Bus Line
	6800 450  6800 3450
Wire Bus Line
	6800 3450 4550 3450
Wire Wire Line
	950  7250 1050 7250
Wire Bus Line
	3100 5550 3100 7800
Wire Wire Line
	950  1500 1050 1500
Wire Wire Line
	5200 4550 5300 4550
Wire Wire Line
	5200 3750 5350 3750
Wire Wire Line
	6550 3850 6850 3850
Wire Wire Line
	8300 2900 8600 2900
Wire Wire Line
	8600 4550 8750 4550
Wire Notes Line
	4550 4100 9400 4100
Wire Notes Line
	9400 4100 9400 4950
Wire Notes Line
	9400 4950 4550 4950
Wire Wire Line
	1000 3350 1150 3350
Wire Wire Line
	5000 5250 4850 5250
Wire Wire Line
	1550 3050 1700 3050
Wire Wire Line
	1700 3050 1700 3700
Wire Wire Line
	1700 3700 4050 3700
Wire Wire Line
	4050 3700 4050 2850
Wire Wire Line
	4050 2850 3450 2850
Wire Wire Line
	1050 3050 1150 3050
Wire Wire Line
	800  900  1050 900 
Wire Wire Line
	800  1000 1050 1000
Wire Wire Line
	800  1100 1050 1100
Wire Wire Line
	8600 3100 7650 3100
Wire Wire Line
	7450 2850 7450 2700
Wire Wire Line
	7350 2300 7450 2300
Wire Wire Line
	7450 2300 7450 2100
Wire Wire Line
	7450 1650 7450 1700
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 Wire Line
	10300 900  10000 900 
Wire Wire Line
	10300 1000 10000 1000
Wire Wire Line
	10300 1100 10000 1100
Wire Wire Line
	10300 1200 10000 1200
Wire Wire Line
	10300 1300 10000 1300
Wire Wire Line
	10300 1400 10000 1400
Wire Wire Line
	10300 1500 10000 1500
Wire Wire Line
	10300 1600 10000 1600
Wire Wire Line
	9300 650  9300 750 
Wire Wire Line
	1550 3700 1550 3350
Wire Bus Line
	4850 1700 4850 2000
Wire Wire Line
	5150 1800 4850 1800
Wire Wire Line
	5150 1900 4850 1900
Wire Wire Line
	5150 2000 4850 2000
Wire Wire Line
	5950 1700 6250 1700
Wire Wire Line
	5950 1900 6250 1900
Wire Wire Line
	5950 1000 6100 1000
Wire Wire Line
	5950 1200 6100 1200
Wire Wire Line
	5950 1400 6100 1400
Wire Wire Line
	5950 1600 6100 1600
Wire Bus Line
	6300 1600 6300 900 
Wire Wire Line
	8600 900  8400 900 
Wire Wire Line
	8600 1000 8400 1000
Wire Wire Line
	8600 1100 8400 1100
Wire Wire Line
	8600 1200 8400 1200
Wire Wire Line
	8600 1300 8400 1300
Wire Wire Line
	8600 1400 8400 1400
Wire Wire Line
	8600 1500 8400 1500
Wire Wire Line
	8600 1600 8400 1600
Wire Wire Line
	8600 1700 8400 1700
Wire Wire Line
	8600 1800 8400 1800
Wire Wire Line
	8600 1900 8400 1900
Wire Wire Line
	8600 2000 8400 2000
Wire Wire Line
	8600 2100 8400 2100
Wire Wire Line
	8600 2200 8400 2200
Wire Wire Line
	8600 2300 8400 2300
Wire Wire Line
	8600 2400 8400 2400
Wire Wire Line
	8600 2500 8400 2500
Wire Wire Line
	8600 2600 8400 2600
Wire Wire Line
	8600 2700 8400 2700
Wire Bus Line
	2650 5050 2650 4650
Wire Bus Line
	900  5050 900  4350
Wire Wire Line
	4850 5750 4850 5850
Wire Wire Line
	4600 5850 4600 6000
Wire Wire Line
	3250 5850 3500 5850
Connection ~ 3400 5850
Wire Wire Line
	8050 2500 7650 2500
Wire Wire Line
	7650 2500 7650 3150
Connection ~ 7650 3100
Wire Wire Line
	8050 2000 8050 1850
Connection ~ 1700 2750
Wire Wire Line
	2050 2650 2000 2650
Wire Wire Line
	2050 2850 2000 2850
Wire Wire Line
	5950 2200 6100 2200
Wire Wire Line
	5950 2300 6100 2300
Wire Wire Line
	5950 2400 6100 2400
Wire Wire Line
	5950 2500 6100 2500
Wire Wire Line
	5950 2600 6100 2600
Wire Wire Line
	5950 2700 6100 2700
Wire Wire Line
	8900 5350 8900 5300
Wire Wire Line
	8550 5350 9200 5350
Connection ~ 8900 5350
Wire Wire Line
	6800 4450 6800 5150
Connection ~ 6800 4650
$Comp
L GND #PWR01
U 1 1 4DBD5A06
P 6800 5550
F 0 "#PWR01" H 6800 5550 30  0001 C CNN
F 1 "GND" H 6800 5480 30  0001 C CNN
	1    6800 5550
	1    0    0    -1  
$EndComp
$Comp
L 74LS00 U1
U 3 1 4DBD59C0
P 7400 5250
F 0 "U1" H 7400 5300 60  0000 C CNN
F 1 "74LS00" H 7400 5150 60  0000 C CNN
	3    7400 5250
	1    0    0    1   
$EndComp
Text Label 3850 2200 0    60   ~ 0
AC4
Text Label 4850 5250 0    60   ~ 0
AC4
$Comp
L GND #PWR02
U 1 1 4DBD3AB8
P 8900 5900
F 0 "#PWR02" H 8900 5900 30  0001 C CNN
F 1 "GND" H 8900 5830 30  0001 C CNN
	1    8900 5900
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR03
U 1 1 4DBD3AB1
P 8900 5300
F 0 "#PWR03" H 8900 5400 30  0001 C CNN
F 1 "VCC" H 8900 5400 30  0000 C CNN
	1    8900 5300
	1    0    0    -1  
$EndComp
NoConn ~ 8400 2700
NoConn ~ 3450 3350
NoConn ~ 3450 3250
$Comp
L GND #PWR04
U 1 1 4DBD263D
P 3650 2650
F 0 "#PWR04" H 3650 2650 30  0001 C CNN
F 1 "GND" H 3650 2580 30  0001 C CNN
	1    3650 2650
	1    0    0    -1  
$EndComp
NoConn ~ 1550 3250
NoConn ~ 1550 3150
NoConn ~ 1150 3250
NoConn ~ 1150 3150
Text GLabel 6100 2100 2    60   Output ~ 0
MREQ
NoConn ~ 6100 2700
NoConn ~ 6100 2600
NoConn ~ 6100 2500
NoConn ~ 6100 2400
NoConn ~ 6100 2300
NoConn ~ 6100 2200
Text Label 1850 3450 0    60   ~ 0
I4
Text Label 2000 2650 0    60   ~ 0
I3
Text Label 1850 3250 0    60   ~ 0
I2
Text Label 2000 2850 0    60   ~ 0
I1
Text Label 1550 2950 0    60   ~ 0
I4
Text Label 1550 2850 0    60   ~ 0
I3
Text Label 1550 2750 0    60   ~ 0
I2
Text Label 1550 2650 0    60   ~ 0
I1
$Comp
L VCC #PWR05
U 1 1 4DBC6DC1
P 1850 2050
F 0 "#PWR05" H 1850 2150 30  0001 C CNN
F 1 "VCC" H 1850 2150 30  0000 C CNN
	1    1850 2050
	1    0    0    -1  
$EndComp
$Comp
L +BATT #PWR06
U 1 1 4DBC65B0
P 8400 2600
F 0 "#PWR06" H 8400 2550 20  0001 C CNN
F 1 "+BATT" H 8400 2700 30  0000 C CNN
	1    8400 2600
	0    -1   -1   0   
$EndComp
$Comp
L +BATT #PWR07
U 1 1 4DBC6468
P 8050 1850
F 0 "#PWR07" H 8050 1800 20  0001 C CNN
F 1 "+BATT" H 8050 1950 30  0000 C CNN
	1    8050 1850
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR08
U 1 1 4DBC00D5
P 3400 6350
F 0 "#PWR08" H 3400 6450 30  0001 C CNN
F 1 "VCC" H 3400 6450 30  0000 C CNN
	1    3400 6350
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR09
U 1 1 4DBC006F
P 4600 6000
F 0 "#PWR09" H 4600 6000 30  0001 C CNN
F 1 "GND" H 4600 5930 30  0001 C CNN
	1    4600 6000
	1    0    0    -1  
$EndComp
$Comp
L +BATT #PWR010
U 1 1 4DBC006B
P 3250 5850
F 0 "#PWR010" H 3250 5800 20  0001 C CNN
F 1 "+BATT" H 3250 5950 30  0000 C CNN
	1    3250 5850
	0    -1   -1   0   
$EndComp
$Comp
L +BATT #PWR011
U 1 1 4DBC004F
P 4850 5750
F 0 "#PWR011" H 4850 5700 20  0001 C CNN
F 1 "+BATT" H 4850 5850 30  0000 C CNN
	1    4850 5750
	1    0    0    -1  
$EndComp
$Comp
L +BATT #PWR012
U 1 1 4DBC0046
P 9300 650
F 0 "#PWR012" H 9300 600 20  0001 C CNN
F 1 "+BATT" H 9300 750 30  0000 C CNN
	1    9300 650 
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR013
U 1 1 4DBBFE96
P 4850 6350
F 0 "#PWR013" H 4850 6350 30  0001 C CNN
F 1 "GND" H 4850 6280 30  0001 C CNN
	1    4850 6350
	1    0    0    -1  
$EndComp
Text GLabel 6150 2800 2    60   Output ~ 0
ROMEN
Text Label 2000 2950 0    60   ~ 0
AC3
Text Label 1850 3150 0    60   ~ 0
AC2
Text Label 2000 2750 0    60   ~ 0
AC1
Text Label 1850 3350 0    60   ~ 0
AC0
Text Label 900  1100 0    60   ~ 0
IS2
Text Label 900  1000 0    60   ~ 0
IS1
Text Label 900  900  0    60   ~ 0
IS0
Text Label 2550 4650 0    60   ~ 0
AC4
Text Label 2550 4950 0    60   ~ 0
AC3
Text Label 2550 4450 0    60   ~ 0
AC2
Text Label 2550 5050 0    60   ~ 0
AC1
Text Label 2550 4350 0    60   ~ 0
AC0
Text Label 2550 4750 0    60   ~ 0
IS2
Text Label 2550 4550 0    60   ~ 0
IS1
Text Label 2550 4850 0    60   ~ 0
IS0
Text Label 950  7050 0    60   ~ 0
A15
Text Label 950  7250 0    60   ~ 0
A14
Text Label 1000 5850 0    60   ~ 0
A13
$Comp
L VCC #PWR014
U 1 1 4DBBEA82
P 4950 2100
F 0 "#PWR014" H 4950 2200 30  0001 C CNN
F 1 "VCC" H 4950 2200 30  0000 C CNN
	1    4950 2100
	0    -1   -1   0   
$EndComp
Text Label 8400 2100 0    60   ~ 0
A13
Text Label 8400 2200 0    60   ~ 0
A12
Text Label 8400 1600 0    60   ~ 0
A11
Text Label 8400 1700 0    60   ~ 0
A10
Text Label 8400 1500 0    60   ~ 0
A9
Text Label 8400 1800 0    60   ~ 0
A8
Text Label 8400 1400 0    60   ~ 0
A7
Text Label 8400 2000 0    60   ~ 0
A6
Text Label 8400 1300 0    60   ~ 0
A5
Text Label 8400 1900 0    60   ~ 0
A4
Text Label 8400 1200 0    60   ~ 0
A3
Text Label 8400 1100 0    60   ~ 0
A2
Text Label 8400 900  0    60   ~ 0
A1
Text Label 8400 1000 0    60   ~ 0
A0
Text Label 5000 900  0    60   ~ 0
A15
Text Label 6100 900  0    60   ~ 0
A14
Text Label 5000 1000 0    60   ~ 0
A13
Text Label 6100 1000 0    60   ~ 0
A12
Text Label 5000 1100 0    60   ~ 0
A11
Text Label 6100 1100 0    60   ~ 0
A10
Text Label 5000 1200 0    60   ~ 0
A9
Text Label 6100 1200 0    60   ~ 0
A8
Text Label 5000 1300 0    60   ~ 0
A7
Text Label 6100 1300 0    60   ~ 0
A6
Text Label 5000 1400 0    60   ~ 0
A5
Text Label 6100 1400 0    60   ~ 0
A4
Text Label 5000 1500 0    60   ~ 0
A3
Text Label 6100 1500 0    60   ~ 0
A2
Text Label 5000 1600 0    60   ~ 0
A1
Text Label 6100 1600 0    60   ~ 0
A0
Text Label 1000 4850 0    60   ~ 0
D7
Text Label 1000 4550 0    60   ~ 0
D6
Text Label 1000 4750 0    60   ~ 0
D5
Text Label 1000 4650 0    60   ~ 0
D4
Text Label 1000 4950 0    60   ~ 0
D3
Text Label 1000 4450 0    60   ~ 0
D2
Text Label 1000 5050 0    60   ~ 0
D1
Text Label 1000 4350 0    60   ~ 0
D0
Entry Wire Line
	6250 2000 6350 1900
Entry Wire Line
	6250 1900 6350 1800
Entry Wire Line
	6250 1800 6350 1700
Entry Wire Line
	6250 1700 6350 1600
Entry Wire Line
	4850 2000 4950 1900
Entry Wire Line
	4850 1900 4950 1800
Entry Wire Line
	4850 1800 4950 1700
Entry Wire Line
	4850 1700 4950 1600
Text Label 6100 2000 0    60   ~ 0
D7
Text Label 6100 1900 0    60   ~ 0
D5
Text Label 6100 1800 0    60   ~ 0
D3
Text Label 6100 1700 0    60   ~ 0
D1
Text Label 4950 2000 0    60   ~ 0
D6
Text Label 4950 1900 0    60   ~ 0
D4
Text Label 4950 1800 0    60   ~ 0
D2
Text Label 4950 1700 0    60   ~ 0
D0
$Comp
L GND #PWR015
U 1 1 4DBBE106
P 9300 3350
F 0 "#PWR015" H 9300 3350 30  0001 C CNN
F 1 "GND" H 9300 3280 30  0001 C CNN
	1    9300 3350
	1    0    0    -1  
$EndComp
Text GLabel 4950 2900 0    60   Input ~ 0
ROMDIS
Entry Wire Line
	10200 1600 10300 1500
Entry Wire Line
	10200 1500 10300 1400
Entry Wire Line
	10200 1400 10300 1300
Entry Wire Line
	10200 1300 10300 1200
Entry Wire Line
	10200 1200 10300 1100
Entry Wire Line
	10200 1100 10300 1000
Entry Wire Line
	10200 1000 10300 900 
Entry Wire Line
	10200 900  10300 800 
Text Label 10000 1100 0    60   ~ 0
D7
Text Label 10000 1300 0    60   ~ 0
D6
Text Label 10000 1000 0    60   ~ 0
D5
Text Label 10000 1200 0    60   ~ 0
D4
Text Label 10000 1400 0    60   ~ 0
D3
Text Label 10000 900  0    60   ~ 0
D2
Text Label 10000 1500 0    60   ~ 0
D1
Text Label 10000 1600 0    60   ~ 0
D0
$Comp
L VCC #PWR016
U 1 1 4CECEA88
P 7600 1500
F 0 "#PWR016" H 7600 1600 30  0001 C CNN
F 1 "VCC" H 7600 1600 30  0000 C CNN
	1    7600 1500
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR017
U 1 1 4CECE95E
P 7150 3300
F 0 "#PWR017" H 7150 3300 30  0001 C CNN
F 1 "GND" H 7150 3230 30  0001 C CNN
	1    7150 3300
	1    0    0    -1  
$EndComp
Text Notes 1600 5050 0    60   ~ 0
register
Text Notes 1700 1500 1    60   ~ 0
demultiplexer
Entry Wire Line
	800  1100 900  1200
Entry Wire Line
	800  1000 900  1100
Entry Wire Line
	800  900  900  1000
Text GLabel 1050 3050 0    60   Input ~ 0
_A3
Text GLabel 6500 5350 2    60   Output ~ 0
_A3
Text GLabel 1000 3350 0    60   Input ~ 0
WRITE_EN
Text Notes 6400 4200 0    60   ~ 0
Rom active notification
Text Notes 4900 3600 0    60   ~ 0
Write detection
Text GLabel 5200 4350 0    60   Input ~ 0
ROM_ACTIVE
Text GLabel 5200 3750 0    60   Input ~ 0
WR
$Comp
L 74LS00 U1
U 4 1 4CA8A6F2
P 5600 5350
F 0 "U1" H 5600 5400 60  0000 C CNN
F 1 "74LS00" H 5600 5250 60  0000 C CNN
	4    5600 5350
	1    0    0    -1  
$EndComp
Text GLabel 8300 2900 0    60   Input ~ 0
ROM_ACTIVE
Text GLabel 8750 4550 2    60   Output ~ 0
ROMDIS
$Comp
L 74LS00 U1
U 2 1 4CA89EED
P 7400 4550
F 0 "U1" H 7400 4600 60  0000 C CNN
F 1 "74LS00" H 7400 4450 60  0000 C CNN
	2    7400 4550
	1    0    0    -1  
$EndComp
Text GLabel 5200 4550 0    60   Input ~ 0
ROMEN
Text GLabel 5200 3950 0    60   Input ~ 0
ROM_ACTIVE
Text GLabel 950  1600 0    60   Input ~ 0
MREQ
Text GLabel 950  1500 0    60   Input ~ 0
ROM_ACC
Text Notes 650  6900 0    60   ~ 0
Rom access detection
Text GLabel 2450 7150 2    60   Output ~ 0
ROM_ACC
NoConn ~ 6100 2900
NoConn ~ 6100 3000
NoConn ~ 6100 3100
NoConn ~ 6100 3200
NoConn ~ 6100 800 
NoConn ~ 4950 800 
NoConn ~ 4950 2200
NoConn ~ 4950 2500
NoConn ~ 4950 2600
NoConn ~ 4950 2700
NoConn ~ 4950 2800
NoConn ~ 4950 3000
NoConn ~ 4950 3100
Text Notes 4700 550  0    60   ~ 0
\ncpc connector
Text Notes 600  5700 0    60   ~ 0
OUT Decoder
Text GLabel 900  6600 0    60   Input ~ 0
WR
Text GLabel 4900 2400 0    60   Output ~ 0
WR
$Comp
L GND #PWR018
U 1 1 4CA89326
P 4900 3300
F 0 "#PWR018" H 4900 3300 30  0001 C CNN
F 1 "GND" H 4900 3230 30  0001 C CNN
	1    4900 3300
	1    0    0    -1  
$EndComp
Text GLabel 4900 2300 0    60   Output ~ 0
IORQ
Text GLabel 900  6400 0    60   Input ~ 0
IORQ
$Comp
L 74LS32 U3
U 1 1 4CA89162
P 1700 6500
F 0 "U3" H 1700 6550 60  0000 C CNN
F 1 "74LS32" H 1700 6450 60  0000 C CNN
	1    1700 6500
	1    0    0    -1  
$EndComp
Text GLabel 2450 5950 2    60   Output ~ 0
ROMSEL
Text GLabel 900  5250 0    60   Input ~ 0
ROMSEL
$Comp
L 74LS32 U3
U 4 1 4CA89099
P 1700 5950
F 0 "U3" H 1700 6000 60  0000 C CNN
F 1 "74LS32" H 1700 5900 60  0000 C CNN
	4    1700 5950
	1    0    0    1   
$EndComp
Text Notes 2800 4550 0    60   ~ 0
To individual rom select
Text Notes 2800 4950 0    60   ~ 0
To address comparator
Entry Wire Line
	2650 4650 2750 4750
Entry Wire Line
	2650 4550 2750 4650
Entry Wire Line
	2650 4450 2750 4550
Entry Wire Line
	2650 4350 2750 4450
$Comp
L GND #PWR019
U 1 1 4CA88AFC
P 900 5400
F 0 "#PWR019" 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
Entry Wire Line
	2650 5050 2750 5150
Entry Wire Line
	2650 4950 2750 5050
Entry Wire Line
	2650 4750 2750 4850
Text Notes 1150 4200 0    60   ~ 0
Current ROM number storage
Text GLabel 8300 3000 0    60   Input ~ 0
WRITE_EN
$Comp
L VCC #PWR020
U 1 1 4CA884DF
P 1050 3850
F 0 "#PWR020" H 1050 3950 30  0001 C CNN
F 1 "VCC" H 1050 3950 30  0000 C CNN
	1    1050 3850
	-1   0    0    1   
$EndComp
Text GLabel 1550 3700 3    60   Output ~ 0
WRITE
Text Notes 2500 2550 0    60   ~ 0
comparator
$Comp
L GND #PWR021
U 1 1 4CA882D1
P 900 2850
F 0 "#PWR021" H 900 2850 30  0001 C CNN
F 1 "GND" H 900 2780 30  0001 C CNN
	1    900  2850
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR022
U 1 1 4CA88282
P 3800 850
F 0 "#PWR022" H 3800 950 30  0001 C CNN
F 1 "VCC" H 3800 950 30  0000 C CNN
	1    3800 850 
	1    0    0    -1  
$EndComp
Text GLabel 3950 1600 2    60   Output ~ 0
ROM_ACTIVE
Text GLabel 3650 3450 2    60   Output ~ 0
MATCH
Text GLabel 950  1400 0    60   Input ~ 0
MATCH
$Comp
L 74LS32 U3
U 3 1 4CA87CE5
P 5900 4450
F 0 "U3" H 5900 4500 60  0000 C CNN
F 1 "74LS32" H 5900 4400 60  0000 C CNN
	3    5900 4450
	1    0    0    1   
$EndComp
Text Notes 1800 650  0    60   ~ 0
Individual ROM selection
$Comp
L BATTERY BT1
U 1 1 4CA87798
P 4300 5850
F 0 "BT1" H 4300 6050 50  0000 C CNN
F 1 "CR2032" H 4300 5660 50  0000 C CNN
	1    4300 5850
	1    0    0    -1  
$EndComp
$Comp
L SRAM_512KO U6
U 1 1 4CA871FB
P 9300 2000
F 0 "U6" H 9400 3200 70  0000 L CNN
F 1 "SRAM_512KO" H 9400 800 70  0000 L CNN
	1    9300 2000
	1    0    0    -1  
$EndComp
$Comp
L BC307 Q1
U 1 1 4CA87175
P 7450 3050
F 0 "Q1" H 7650 2950 50  0000 C CNN
F 1 "BC307" H 7700 3200 50  0000 C CNN
	1    7450 3050
	0    1    1    0   
$EndComp
$Comp
L C C4
U 1 1 4CA87152
P 9200 5550
F 0 "C4" H 9250 5650 50  0000 L CNN
F 1 "C" H 9250 5450 50  0000 L CNN
	1    9200 5550
	1    0    0    -1  
$EndComp
$Comp
L C C3
U 1 1 4CA87151
P 8900 5550
F 0 "C3" H 8950 5650 50  0000 L CNN
F 1 "C" H 8950 5450 50  0000 L CNN
	1    8900 5550
	1    0    0    -1  
$EndComp
$Comp
L CP1 C1
U 1 1 4CA87148
P 7150 2300
F 0 "C1" H 7200 2400 50  0000 L CNN
F 1 "1µF" H 7200 2200 50  0000 L CNN
	1    7150 2300
	0    1    1    0   
$EndComp
$Comp
L CP1 C5
U 1 1 4CA87146
P 8550 5550
F 0 "C5" H 8600 5650 50  0000 L CNN
F 1 "CP1" H 8600 5450 50  0000 L CNN
	1    8550 5550
	1    0    0    -1  
$EndComp
$Comp
L CONN_25X2 P1
U 1 1 4CA8712F
P 5550 2000
F 0 "P1" H 5550 3300 60  0000 C CNN
F 1 "CONN_25X2" V 5550 2000 50  0000 C CNN
	1    5550 2000
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 4CA870EF
P 4850 6050
F 0 "C2" H 4900 6150 50  0000 L CNN
F 1 "C" H 4900 5950 50  0000 L CNN
	1    4850 6050
	1    0    0    -1  
$EndComp
$Comp
L R R9
U 1 1 4CA870E2
P 3850 2600
F 0 "R9" V 3930 2600 50  0000 C CNN
F 1 "R" V 3850 2600 50  0000 C CNN
	1    3850 2600
	1    0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 4CA870DC
P 7200 2700
F 0 "R1" V 7280 2700 50  0000 C CNN
F 1 "10K" V 7200 2700 50  0000 C CNN
	1    7200 2700
	0    1    1    0   
$EndComp
$Comp
L R R7
U 1 1 4CA870DB
P 7750 1900
F 0 "R7" V 7830 1900 50  0000 C CNN
F 1 "1K" V 7750 1900 50  0000 C CNN
	1    7750 1900
	1    0    0    -1  
$EndComp
$Comp
L R R10
U 1 1 4CA870DA
P 8050 2250
F 0 "R10" V 8130 2250 50  0000 C CNN
F 1 "R" V 8050 2250 50  0000 C CNN
	1    8050 2250
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 4CA870D9
P 1050 3600
F 0 "R2" V 1130 3600 50  0000 C CNN
F 1 "10KR" V 1050 3600 50  0000 C CNN
	1    1050 3600
	-1   0    0    1   
$EndComp
$Comp
L R R6
U 1 1 4CA870D8
P 1900 2700
F 0 "R6" V 1980 2700 50  0000 C CNN
F 1 "10KR" V 1900 2700 50  0000 C CNN
	1    1900 2700
	1    0    0    -1  
$EndComp
$Comp
L R R5
U 1 1 4CA870D0
P 1800 2600
F 0 "R5" V 1880 2600 50  0000 C CNN
F 1 "10KR" V 1800 2600 50  0000 C CNN
	1    1800 2600
	1    0    0    -1  
$EndComp
$Comp
L R R4
U 1 1 4CA870CB
P 1700 2500
F 0 "R4" V 1780 2500 50  0000 C CNN
F 1 "10KR" V 1700 2500 50  0000 C CNN
	1    1700 2500
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 4CA870C7
P 1600 2400
F 0 "R3" V 1680 2400 50  0000 C CNN
F 1 "10KR" V 1600 2400 50  0000 C CNN
	1    1600 2400
	1    0    0    -1  
$EndComp
$Comp
L R R8
U 1 1 4CA870C2
P 3800 1250
F 0 "R8" V 3880 1250 50  0000 C CNN
F 1 "R" V 3800 1250 50  0000 C CNN
	1    3800 1250
	1    0    0    -1  
$EndComp
$Comp
L DIODE D11
U 1 1 4CA870B3
P 3400 6050
F 0 "D11" H 3400 6150 40  0000 C CNN
F 1 "DIODE" H 3400 5950 40  0000 C CNN
	1    3400 6050
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D1
U 1 1 4CA870AF
P 7450 1900
F 0 "D1" H 7450 2000 40  0000 C CNN
F 1 "1N4148" H 7450 1800 40  0000 C CNN
	1    7450 1900
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D12
U 1 1 4CA870AC
P 3700 5850
F 0 "D12" H 3700 5950 40  0000 C CNN
F 1 "BAT85" H 3700 5750 40  0000 C CNN
	1    3700 5850
	-1   0    0    1   
$EndComp
$Comp
L DIODE D13
U 1 1 4CA870AA
P 8400 4550
F 0 "D13" H 8400 4650 40  0000 C CNN
F 1 "DIODE" H 8400 4450 40  0000 C CNN
	1    8400 4550
	1    0    0    -1  
$EndComp
$Comp
L DIODE D2
U 1 1 4CA870A4
P 7450 2500
F 0 "D2" H 7450 2600 40  0000 C CNN
F 1 "BZX55C" H 7450 2400 40  0000 C CNN
	1    7450 2500
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D10
U 1 1 4CA8709A
P 3350 1600
F 0 "D10" H 3350 1700 40  0000 C CNN
F 1 "DIODE" H 3350 1500 40  0000 C CNN
	1    3350 1600
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D9
U 1 1 4CA87098
P 3350 1500
F 0 "D9" H 3350 1600 40  0000 C CNN
F 1 "DIODE" H 3350 1400 40  0000 C CNN
	1    3350 1500
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D8
U 1 1 4CA87095
P 3350 1400
F 0 "D8" H 3350 1500 40  0000 C CNN
F 1 "DIODE" H 3350 1300 40  0000 C CNN
	1    3350 1400
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D7
U 1 1 4CA87093
P 3350 1300
F 0 "D7" H 3350 1400 40  0000 C CNN
F 1 "DIODE" H 3350 1200 40  0000 C CNN
	1    3350 1300
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D6
U 1 1 4CA87092
P 3350 1200
F 0 "D6" H 3350 1300 40  0000 C CNN
F 1 "DIODE" H 3350 1100 40  0000 C CNN
	1    3350 1200
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D5
U 1 1 4CA87090
P 3350 1100
F 0 "D5" H 3350 1200 40  0000 C CNN
F 1 "DIODE" H 3350 1000 40  0000 C CNN
	1    3350 1100
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D4
U 1 1 4CA8708D
P 3350 1000
F 0 "D4" H 3350 1100 40  0000 C CNN
F 1 "DIODE" H 3350 900 40  0000 C CNN
	1    3350 1000
	-1   0    0    -1  
$EndComp
$Comp
L DIODE D3
U 1 1 4CA87086
P 3350 900
F 0 "D3" H 3350 1000 40  0000 C CNN
F 1 "DIODE" H 3350 800 40  0000 C CNN
	1    3350 900 
	-1   0    0    -1  
$EndComp
$Comp
L DIPS_08 SW_CFG1
U 1 1 4CA87071
P 1350 3000
F 0 "SW_CFG1" V 900 3000 60  0000 C CNN
F 1 "DIPS_08" V 1800 3000 60  0000 C CNN
	1    1350 3000
	0    -1   1    0   
$EndComp
$Comp
L DIPS_08 SW_ROMEN1
U 1 1 4CA8706E
P 2600 1250
F 0 "SW_ROMEN1" V 2150 1250 60  0000 C CNN
F 1 "DIPS_08" V 3050 1250 60  0000 C CNN
	1    2600 1250
	0    1    1    0   
$EndComp
$Comp
L 74LS85 U5
U 1 1 4CA86E70
P 2750 3050
F 0 "U5" H 2800 3150 60  0000 C CNN
F 1 "74LS85" H 2800 3000 60  0000 C CNN
	1    2750 3050
	1    0    0    -1  
$EndComp
$Comp
L 74LS374 U4
U 1 1 4CA86E68
P 1750 4850
F 0 "U4" H 1750 4850 60  0000 C CNN
F 1 "74LS374" H 1800 4500 60  0000 C CNN
	1    1750 4850
	1    0    0    -1  
$EndComp
$Comp
L 74LS32 U3
U 2 1 4CA86E60
P 5950 3850
F 0 "U3" H 5950 3900 60  0000 C CNN
F 1 "74LS32" H 5950 3800 60  0000 C CNN
	2    5950 3850
	1    0    0    -1  
$EndComp
$Comp
L 74LS00 U1
U 1 1 4CA86E52
P 1650 7150
F 0 "U1" H 1650 7200 60  0000 C CNN
F 1 "74LS00" H 1650 7050 60  0000 C CNN
	1    1650 7150
	1    0    0    -1  
$EndComp
$Comp
L 74LS138 U2
U 1 1 4CA86E2A
P 1650 1250
F 0 "U2" H 1750 1750 60  0000 C CNN
F 1 "74LS138" H 1800 701 60  0000 C CNN
	1    1650 1250
	1    0    0    -1  
$EndComp
$EndSCHEMATC