Apple-1-HW/RC6502-Apple-1-Replica
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RC6502-Apple-1-Replica/RC6502 RAM/RC6502 RAM.sch
Unknown bcedf3cb12 Fixed RAM board block select logic
2019-02-16 22:24:28 +01:00

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EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:microcontrollers
LIBS:dsp
LIBS:microchip
LIBS:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:interface
LIBS:digital-audio
LIBS:philips
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:rc6502_backplane
LIBS:RC6502 RAM-cache
EELAYER 25 0
EELAYER END
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Wire Wire Line
10250 1325 10250 1250
Connection ~ 9950 1325
Connection ~ 10250 1325
Wire Wire Line
9650 800 9650 950
Wire Wire Line
9650 875 10850 875
Wire Wire Line
9950 875 9950 950
Wire Wire Line
10250 875 10250 950
Connection ~ 9950 875
Wire Wire Line
10550 875 10550 950
Connection ~ 10250 875
Connection ~ 9650 875
$Comp
L GND #PWR015
U 1 1 5C1E3B47
P 6600 7500
F 0 "#PWR015" H 6600 7250 50 0001 C CNN
F 1 "GND" H 6600 7350 50 0000 C CNN
F 2 "" H 6600 7500 50 0001 C CNN
F 3 "" H 6600 7500 50 0001 C CNN
1 6600 7500
1 0 0 -1
$EndComp
Wire Wire Line
6500 7350 6500 7425
Wire Wire Line
6500 7425 6700 7425
Wire Wire Line
6700 7425 6700 7350
Wire Wire Line
6600 7500 6600 7425
Connection ~ 6600 7425
NoConn ~ 6600 6150
$Comp
L C C5
U 1 1 5C1EB83C
P 10850 1100
F 0 "C5" H 10875 1200 50 0000 L CNN
F 1 "100nF" H 10875 1000 50 0000 L CNN
F 2 "Capacitors_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm" H 10888 950 50 0001 C CNN
F 3 "" H 10850 1100 50 0001 C CNN
1 10850 1100
1 0 0 -1
$EndComp
Wire Wire Line
10850 875 10850 950
Connection ~ 10550 875
Wire Wire Line
10850 1250 10850 1400
Wire Wire Line
10550 1250 10550 1325
Connection ~ 10550 1325
Connection ~ 10850 1325
$Comp
L Jumper_NC_Dual JP9
U 1 1 5C1ECAEA
P 3500 1325
F 0 "JP9" H 3550 1225 50 0000 L CNN
F 1 "LO/HI" H 3500 1425 50 0000 C BNN
F 2 "Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm" H 3500 1325 50 0001 C CNN
F 3 "" H 3500 1325 50 0001 C CNN
1 3500 1325
0 1 1 0
$EndComp
Wire Wire Line
3325 1325 3400 1325
Wire Wire Line
5100 1000 3500 1000
Wire Wire Line
3500 1000 3500 1075
Wire Wire Line
3500 1575 3500 1650
Wire Wire Line
3500 1650 3750 1650
Wire Wire Line
5100 1000 5100 1650
Wire Wire Line
5100 1325 5175 1325
Connection ~ 5100 1325
Text Notes 7025 6775 0 60 ~ 0
Enhanced RAM board with added support for ROM ICs of type 28C64 or 28C256, can be\naddressed high/low. Individual 4k blocks can be enabled via jumpers.
$Comp
L 74LS08 U3
U 1 1 5C68602F
P 2125 4175
F 0 "U3" H 2125 4225 50 0000 C CNN
F 1 "74LS08" H 2125 4125 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 2125 4175 50 0001 C CNN
F 3 "" H 2125 4175 50 0001 C CNN
1 2125 4175
0 -1 -1 0
$EndComp
$Comp
L 74LS08 U3
U 2 1 5C6865C4
P 2975 4725
F 0 "U3" H 2975 4775 50 0000 C CNN
F 1 "74LS08" H 2975 4675 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 2975 4725 50 0001 C CNN
F 3 "" H 2975 4725 50 0001 C CNN
2 2975 4725
0 -1 -1 0
$EndComp
$Comp
L 74LS08 U3
U 3 1 5C686812
P 3800 5275
F 0 "U3" H 3800 5325 50 0000 C CNN
F 1 "74LS08" H 3800 5225 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 3800 5275 50 0001 C CNN
F 3 "" H 3800 5275 50 0001 C CNN
3 3800 5275
0 -1 -1 0
$EndComp
$Comp
L 74LS08 U3
U 4 1 5C68689D
P 4650 5825
F 0 "U3" H 4650 5875 50 0000 C CNN
F 1 "74LS08" H 4650 5775 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 4650 5825 50 0001 C CNN
F 3 "" H 4650 5825 50 0001 C CNN
4 4650 5825
0 -1 -1 0
$EndComp
$Comp
L 74LS08 U4
U 1 1 5C687BF2
P 3650 3575
F 0 "U4" H 3650 3625 50 0000 C CNN
F 1 "74LS08" H 3650 3525 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 3650 3575 50 0001 C CNN
F 3 "" H 3650 3575 50 0001 C CNN
1 3650 3575
1 0 0 -1
$EndComp
$Comp
L 74LS08 U4
U 2 1 5C687CAF
P 5325 4675
F 0 "U4" H 5325 4725 50 0000 C CNN
F 1 "74LS08" H 5325 4625 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 5325 4675 50 0001 C CNN
F 3 "" H 5325 4675 50 0001 C CNN
2 5325 4675
1 0 0 -1
$EndComp
$Comp
L 74LS08 U4
U 3 1 5C687D29
P 6675 4125
F 0 "U4" H 6675 4175 50 0000 C CNN
F 1 "74LS08" H 6675 4075 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 6675 4125 50 0001 C CNN
F 3 "" H 6675 4125 50 0001 C CNN
3 6675 4125
1 0 0 -1
$EndComp
$Comp
L 74LS08 U4
U 4 1 5C687DB2
P 6600 6750
F 0 "U4" H 6600 6800 50 0000 C CNN
F 1 "74LS08" H 6600 6700 50 0000 C CNN
F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 6600 6750 50 0001 C CNN
F 3 "" H 6600 6750 50 0001 C CNN
4 6600 6750
0 -1 -1 0
$EndComp
$EndSCHEMATC
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