EESchema Schematic File Version 4 EELAYER 30 0 EELAYER END $Descr USLedger 17000 11000 encoding utf-8 Sheet 1 1 Title "Apple II I/O RPi" Date "2020-11-12" Rev "0.4" Comp "Terence J. Boldt" Comment1 "Initial draft desgn" Comment2 "Provides storage and network for the Apple ][" Comment3 "Raspberry Pi Zero W as a daughter board" Comment4 "Expansion card for Apple ][ computers" $EndDescr $Comp L Connector_Generic:Conn_02x25_Counter_Clockwise J0 U 1 1 5FA0A8C3 P 3000 2700 F 0 "J0" H 3050 4117 50 0000 C CNN F 1 "Apple II Expansion Bus" H 3050 4026 50 0000 C CNN F 2 "Hardware:Apple II Expansion Edge Connector" H 3000 2700 50 0001 C CNN F 3 "~" H 3000 2700 50 0001 C CNN 1 3000 2700 1 0 0 -1 $EndComp $Comp L Memory_EPROM:2764 U1 U 1 1 5FA0EF8B P 5950 6400 F 0 "U1" H 5950 7581 50 0000 C CNN F 1 "2764" H 5950 7490 50 0000 C CNN F 2 "Package_DIP:DIP-28_W15.24mm" H 5950 6400 50 0001 C CNN F 3 "https://downloads.reactivemicro.com/Electronics/ROM/2764%20EPROM.pdf" H 5950 6400 50 0001 C CNN 1 5950 6400 1 0 0 -1 $EndComp $Comp L 74xx:74LS245 U0 U 1 1 5FA15F43 P 4850 2100 F 0 "U0" H 4850 3081 50 0000 C CNN F 1 "74LS245" H 4850 2990 50 0000 C CNN F 2 "Package_DIP:DIP-20_W7.62mm" H 4850 2100 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 4850 2100 50 0001 C CNN 1 4850 2100 1 0 0 -1 $EndComp $Comp L 74xx:74LS245 U4 U 1 1 5FA19168 P 9100 2100 F 0 "U4" H 9100 3081 50 0000 C CNN F 1 "74LS245" H 9100 2990 50 0000 C CNN F 2 "Package_DIP:DIP-20_W7.62mm" H 9100 2100 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 9100 2100 50 0001 C CNN 1 9100 2100 1 0 0 -1 $EndComp $Comp L Connector:Raspberry_Pi_2_3 J1 U 1 1 5FA19C2C P 13050 2550 F 0 "J1" H 13050 4031 50 0000 C CNN F 1 "Raspberry_Pi_2_3" H 13050 3940 50 0000 C CNN F 2 "Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical" H 13050 2550 50 0001 C CNN F 3 "https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3bplus_1p0_reduced.pdf" H 13050 2550 50 0001 C CNN 1 13050 2550 1 0 0 -1 $EndComp $Comp L 74xx:74LS374 U5 U 1 1 5FA1EB22 P 9100 4100 F 0 "U5" H 9100 5081 50 0000 C CNN F 1 "74LS374" H 9100 4990 50 0000 C CNN F 2 "Package_DIP:DIP-20_W7.62mm" H 9100 4100 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS374" H 9100 4100 50 0001 C CNN 1 9100 4100 1 0 0 -1 $EndComp Wire Wire Line 4350 1600 3300 1600 Wire Wire Line 4350 1700 3300 1700 Wire Wire Line 4350 1800 3300 1800 Wire Wire Line 3300 1900 4350 1900 Wire Wire Line 4350 2000 3300 2000 Wire Wire Line 3300 2100 4350 2100 Wire Wire Line 4350 2200 3300 2200 Wire Wire Line 3300 2300 4350 2300 Wire Wire Line 5350 1600 6350 1600 Wire Wire Line 5350 1700 6400 1700 Wire Wire Line 8600 1800 8000 1800 Wire Wire Line 5350 1900 6500 1900 Wire Wire Line 5350 2000 6550 2000 Wire Wire Line 8600 2100 7850 2100 Wire Wire Line 5350 2200 6650 2200 Wire Wire Line 8600 2300 7750 2300 Wire Wire Line 8100 1600 8100 3600 Wire Wire Line 8100 3600 8600 3600 Connection ~ 8100 1600 Wire Wire Line 8100 1600 8600 1600 Wire Wire Line 8050 1700 8050 3700 Wire Wire Line 8050 3700 8600 3700 Connection ~ 8050 1700 Wire Wire Line 8050 1700 8600 1700 Wire Wire Line 8000 1800 8000 3800 Wire Wire Line 8000 3800 8600 3800 Connection ~ 8000 1800 Wire Wire Line 8000 1800 6450 1800 Wire Wire Line 7950 1900 7950 3900 Wire Wire Line 7950 3900 8600 3900 Connection ~ 7950 1900 Wire Wire Line 7950 1900 8600 1900 Wire Wire Line 7900 2000 7900 4000 Wire Wire Line 7900 4000 8600 4000 Connection ~ 7900 2000 Wire Wire Line 7900 2000 8600 2000 Wire Wire Line 7850 2100 7850 4100 Wire Wire Line 7850 4100 8600 4100 Connection ~ 7850 2100 Wire Wire Line 7850 2100 6600 2100 Wire Wire Line 7800 2200 7800 4200 Wire Wire Line 7800 4200 8600 4200 Connection ~ 7800 2200 Wire Wire Line 7800 2200 8600 2200 Wire Wire Line 7750 2300 7750 4300 Wire Wire Line 7750 4300 8600 4300 Connection ~ 7750 2300 Wire Wire Line 7750 2300 6700 2300 Wire Wire Line 6350 5600 6350 1600 Connection ~ 6350 1600 Wire Wire Line 6350 1600 8100 1600 Wire Wire Line 6400 1700 6400 5700 Wire Wire Line 6400 5700 6350 5700 Connection ~ 6400 1700 Wire Wire Line 6400 1700 8050 1700 Wire Wire Line 6450 5800 6350 5800 Wire Wire Line 6450 1800 6450 5800 Connection ~ 6450 1800 Wire Wire Line 6450 1800 5350 1800 Wire Wire Line 6500 1900 6500 5900 Wire Wire Line 6500 5900 6350 5900 Connection ~ 6500 1900 Wire Wire Line 6500 1900 7950 1900 Wire Wire Line 6350 6000 6550 6000 Wire Wire Line 6550 6000 6550 2000 Connection ~ 6550 2000 Wire Wire Line 6550 2000 7900 2000 Wire Wire Line 6600 2100 6600 6100 Wire Wire Line 6600 6100 6350 6100 Connection ~ 6600 2100 Wire Wire Line 6600 2100 5350 2100 Wire Wire Line 6350 6200 6650 6200 Wire Wire Line 6650 6200 6650 2200 Connection ~ 6650 2200 Wire Wire Line 6650 2200 7800 2200 Wire Wire Line 6700 2300 6700 6300 Wire Wire Line 6700 6300 6350 6300 Connection ~ 6700 2300 Wire Wire Line 6700 2300 5350 2300 Wire Wire Line 5550 5600 2650 5600 Wire Wire Line 2650 5600 2650 4550 Wire Wire Line 2650 1600 2800 1600 Wire Wire Line 2800 1700 2600 1700 Wire Wire Line 2600 1700 2600 5050 Wire Wire Line 2600 5700 5550 5700 Wire Wire Line 5550 5800 2550 5800 Wire Wire Line 2550 5800 2550 1800 Wire Wire Line 2550 1800 2800 1800 Wire Wire Line 2800 1900 2500 1900 Wire Wire Line 2500 1900 2500 5900 Wire Wire Line 2500 5900 5550 5900 Wire Wire Line 2800 2000 2450 2000 Wire Wire Line 2450 2000 2450 6000 Wire Wire Line 2450 6000 5550 6000 Wire Wire Line 5550 6100 2400 6100 Wire Wire Line 2400 6100 2400 2100 Wire Wire Line 2400 2100 2800 2100 Wire Wire Line 2800 2200 2350 2200 Wire Wire Line 2350 2200 2350 6200 Wire Wire Line 2350 6200 5550 6200 Wire Wire Line 5550 6300 2300 6300 Wire Wire Line 2300 6300 2300 2300 Wire Wire Line 2300 2300 2800 2300 Wire Wire Line 5550 6400 2250 6400 Wire Wire Line 2250 6400 2250 2400 Wire Wire Line 2250 2400 2800 2400 Wire Wire Line 2800 2500 2200 2500 Wire Wire Line 2200 2500 2200 6500 Wire Wire Line 2200 6500 5550 6500 Wire Wire Line 5550 6600 2150 6600 Wire Wire Line 2150 6600 2150 2600 Wire Wire Line 2150 2600 2800 2600 Wire Wire Line 2800 1500 2700 1500 Wire Wire Line 2700 1500 2700 4100 Wire Wire Line 2700 7200 5400 7200 Wire Wire Line 5550 7300 5400 7300 Wire Wire Line 5400 7300 5400 7200 Connection ~ 5400 7200 Wire Wire Line 5400 7200 5550 7200 Wire Wire Line 5400 7100 5400 7000 Wire Wire Line 5400 7000 5550 7000 Wire Wire Line 5400 7100 5550 7100 Wire Wire Line 5400 7000 5400 5400 Wire Wire Line 5400 5400 5950 5400 Connection ~ 5400 7000 Wire Wire Line 2800 3900 2800 5400 Wire Wire Line 2800 5400 5400 5400 Connection ~ 5400 5400 Wire Wire Line 3300 3900 3300 7500 Wire Wire Line 3300 7500 5950 7500 Wire Wire Line 5400 1300 4850 1300 Wire Wire Line 5400 1300 9100 1300 Connection ~ 5400 1300 Wire Wire Line 9100 3300 5400 3300 Wire Wire Line 5400 1300 5400 2450 Connection ~ 5400 3300 Wire Wire Line 5400 3300 5400 5400 Wire Wire Line 5950 7500 6450 7500 Wire Wire Line 8300 7500 8300 6350 Wire Wire Line 8300 4900 9100 4900 Connection ~ 5950 7500 Wire Wire Line 8300 4900 8300 4600 Wire Wire Line 8300 2900 9100 2900 Connection ~ 8300 4900 Wire Wire Line 8600 2500 8300 2500 Wire Wire Line 8300 2500 8300 2900 Connection ~ 8300 2900 Wire Wire Line 8600 4600 8300 4600 Connection ~ 8300 4600 Wire Wire Line 8300 4600 8300 2900 Wire Wire Line 12950 1250 12850 1250 Connection ~ 12850 1250 Connection ~ 9100 1300 Wire Wire Line 9100 2900 9600 2900 Wire Wire Line 10650 2900 10650 3850 Wire Wire Line 10650 3850 12650 3850 Connection ~ 9100 2900 Wire Wire Line 12650 3850 12750 3850 Connection ~ 12650 3850 Wire Wire Line 12750 3850 12850 3850 Connection ~ 12750 3850 Wire Wire Line 12850 3850 12950 3850 Connection ~ 12850 3850 Wire Wire Line 12950 3850 13050 3850 Connection ~ 12950 3850 Wire Wire Line 13050 3850 13150 3850 Connection ~ 13050 3850 Wire Wire Line 13150 3850 13250 3850 Connection ~ 13150 3850 Wire Wire Line 13250 3850 13350 3850 Connection ~ 13250 3850 Connection ~ 3300 3900 Wire Wire Line 13850 2250 14100 2250 Wire Wire Line 14100 2250 14100 1100 Wire Wire Line 14100 1100 9600 1100 Wire Wire Line 9600 1100 9600 1600 Wire Wire Line 10700 2050 10700 1700 Wire Wire Line 12250 3250 10750 3250 Wire Wire Line 10750 3250 10750 1800 Wire Wire Line 10750 1800 9600 1800 Wire Wire Line 12250 2750 10800 2750 Wire Wire Line 10800 2750 10800 1900 Wire Wire Line 10800 1900 9600 1900 Wire Wire Line 12250 2050 10700 2050 Wire Wire Line 13850 2950 14150 2950 Wire Wire Line 14150 2950 14150 900 Wire Wire Line 14150 900 9750 900 Wire Wire Line 9750 900 9750 2000 Wire Wire Line 9750 2000 9600 2000 Wire Wire Line 13850 2850 14200 2850 Wire Wire Line 14200 2850 14200 850 Wire Wire Line 14200 850 9800 850 Wire Wire Line 9800 850 9800 2100 Wire Wire Line 9800 2100 9600 2100 Wire Wire Line 13850 3050 14250 3050 Wire Wire Line 14250 3050 14250 800 Wire Wire Line 14250 800 9850 800 Wire Wire Line 9850 800 9850 2200 Wire Wire Line 9850 2200 9600 2200 Wire Wire Line 13850 2350 14300 2350 Wire Wire Line 14300 2350 14300 750 Wire Wire Line 14300 750 9900 750 Wire Wire Line 9900 750 9900 2300 Wire Wire Line 9900 2300 9600 2300 Wire Wire Line 9100 1250 9100 1300 Wire Wire Line 13850 2450 14300 2450 Wire Wire Line 14300 2450 14300 4000 Wire Wire Line 14300 4000 10500 4000 Wire Wire Line 10500 4000 10500 3600 Wire Wire Line 10500 3600 10250 3600 Wire Wire Line 9600 3700 10200 3700 Wire Wire Line 10450 3700 10450 4050 Wire Wire Line 10450 4050 14000 4050 Wire Wire Line 14000 4050 14000 3350 Wire Wire Line 14000 3350 13850 3350 Wire Wire Line 10850 2350 10850 3800 Wire Wire Line 10850 3800 10150 3800 Wire Wire Line 10850 2350 12250 2350 Wire Wire Line 12250 3150 10900 3150 Wire Wire Line 10900 3150 10900 3900 Wire Wire Line 10900 3900 10100 3900 Wire Wire Line 9600 4000 10050 4000 Wire Wire Line 10400 2550 12250 2550 Wire Wire Line 10400 2550 10400 4000 Wire Wire Line 12250 2450 10350 2450 Wire Wire Line 10350 2450 10350 4100 Wire Wire Line 10350 4100 10000 4100 Wire Wire Line 12250 1950 10300 1950 Wire Wire Line 10300 1950 10300 4200 Wire Wire Line 10300 4200 9950 4200 Wire Wire Line 13850 3250 14050 3250 Wire Wire Line 14050 3250 14050 4300 Wire Wire Line 14050 4300 9900 4300 $Comp L Device:R R8 U 1 1 5FA241D5 P 10050 5450 F 0 "R8" H 10120 5496 50 0000 L CNN F 1 "3K" H 10120 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 9980 5450 50 0001 C CNN F 3 "~" H 10050 5450 50 0001 C CNN 1 10050 5450 1 0 0 -1 $EndComp $Comp L Device:R R9 U 1 1 5FA246F6 P 10300 5450 F 0 "R9" H 10370 5496 50 0000 L CNN F 1 "3K" H 10370 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10230 5450 50 0001 C CNN F 3 "~" H 10300 5450 50 0001 C CNN 1 10300 5450 1 0 0 -1 $EndComp $Comp L Device:R RA1 U 1 1 5FA24EB1 P 10550 5450 F 0 "RA1" H 10620 5496 50 0000 L CNN F 1 "3K" H 10620 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10480 5450 50 0001 C CNN F 3 "~" H 10550 5450 50 0001 C CNN 1 10550 5450 1 0 0 -1 $EndComp $Comp L Device:R RB1 U 1 1 5FA253F4 P 10800 5450 F 0 "RB1" H 10870 5496 50 0000 L CNN F 1 "3K" H 10870 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10730 5450 50 0001 C CNN F 3 "~" H 10800 5450 50 0001 C CNN 1 10800 5450 1 0 0 -1 $EndComp $Comp L Device:R RC1 U 1 1 5FA25849 P 11050 5450 F 0 "RC1" H 11120 5496 50 0000 L CNN F 1 "3K" H 11120 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10980 5450 50 0001 C CNN F 3 "~" H 11050 5450 50 0001 C CNN 1 11050 5450 1 0 0 -1 $EndComp $Comp L Device:R RD1 U 1 1 5FA25CA5 P 11300 5450 F 0 "RD1" H 11370 5496 50 0000 L CNN F 1 "3K" H 11370 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 11230 5450 50 0001 C CNN F 3 "~" H 11300 5450 50 0001 C CNN 1 11300 5450 1 0 0 -1 $EndComp $Comp L Device:R RE1 U 1 1 5FA2611D P 11550 5450 F 0 "RE1" H 11620 5496 50 0000 L CNN F 1 "3K" H 11620 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 11480 5450 50 0001 C CNN F 3 "~" H 11550 5450 50 0001 C CNN 1 11550 5450 1 0 0 -1 $EndComp $Comp L Device:R RF1 U 1 1 5FA2686B P 11800 5450 F 0 "RF1" H 11870 5496 50 0000 L CNN F 1 "3K" H 11870 5405 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 11730 5450 50 0001 C CNN F 3 "~" H 11800 5450 50 0001 C CNN 1 11800 5450 1 0 0 -1 $EndComp $Comp L Device:R R0 U 1 1 5FAAFB0D P 10050 4950 F 0 "R0" H 10120 4996 50 0000 L CNN F 1 "2K" H 10120 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 9980 4950 50 0001 C CNN F 3 "~" H 10050 4950 50 0001 C CNN 1 10050 4950 1 0 0 -1 $EndComp $Comp L Device:R R1 U 1 1 5FAAFB13 P 10300 4950 F 0 "R1" H 10370 4996 50 0000 L CNN F 1 "2K" H 10370 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10230 4950 50 0001 C CNN F 3 "~" H 10300 4950 50 0001 C CNN 1 10300 4950 1 0 0 -1 $EndComp $Comp L Device:R R2 U 1 1 5FAAFB19 P 10550 4950 F 0 "R2" H 10620 4996 50 0000 L CNN F 1 "2K" H 10620 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10480 4950 50 0001 C CNN F 3 "~" H 10550 4950 50 0001 C CNN 1 10550 4950 1 0 0 -1 $EndComp $Comp L Device:R R3 U 1 1 5FAAFB1F P 10800 4950 F 0 "R3" H 10870 4996 50 0000 L CNN F 1 "2K" H 10870 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10730 4950 50 0001 C CNN F 3 "~" H 10800 4950 50 0001 C CNN 1 10800 4950 1 0 0 -1 $EndComp $Comp L Device:R R4 U 1 1 5FAAFB25 P 11050 4950 F 0 "R4" H 11120 4996 50 0000 L CNN F 1 "2K" H 11120 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 10980 4950 50 0001 C CNN F 3 "~" H 11050 4950 50 0001 C CNN 1 11050 4950 1 0 0 -1 $EndComp $Comp L Device:R R5 U 1 1 5FAAFB2B P 11300 4950 F 0 "R5" H 11370 4996 50 0000 L CNN F 1 "2K" H 11370 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 11230 4950 50 0001 C CNN F 3 "~" H 11300 4950 50 0001 C CNN 1 11300 4950 1 0 0 -1 $EndComp $Comp L Device:R R6 U 1 1 5FAAFB31 P 11550 4950 F 0 "R6" H 11620 4996 50 0000 L CNN F 1 "2K" H 11620 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 11480 4950 50 0001 C CNN F 3 "~" H 11550 4950 50 0001 C CNN 1 11550 4950 1 0 0 -1 $EndComp $Comp L Device:R R7 U 1 1 5FAAFB37 P 11800 4950 F 0 "R7" H 11870 4996 50 0000 L CNN F 1 "2K" H 11870 4905 50 0000 L CNN F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical" V 11730 4950 50 0001 C CNN F 3 "~" H 11800 4950 50 0001 C CNN 1 11800 4950 1 0 0 -1 $EndComp Wire Wire Line 9100 3300 9650 3300 Wire Wire Line 10600 3300 10600 4800 Wire Wire Line 10600 4800 10550 4800 Connection ~ 9100 3300 Wire Wire Line 10550 4800 10300 4800 Connection ~ 10550 4800 Wire Wire Line 10300 4800 10050 4800 Connection ~ 10300 4800 Wire Wire Line 10600 4800 10800 4800 Wire Wire Line 10800 4800 11050 4800 Connection ~ 10600 4800 Connection ~ 10800 4800 Wire Wire Line 11050 4800 11300 4800 Connection ~ 11050 4800 Wire Wire Line 11300 4800 11550 4800 Connection ~ 11300 4800 Wire Wire Line 11550 4800 11800 4800 Connection ~ 11550 4800 Wire Wire Line 9100 4900 9100 5600 Wire Wire Line 9100 5600 10050 5600 Connection ~ 9100 4900 Wire Wire Line 10050 5600 10300 5600 Connection ~ 10050 5600 Wire Wire Line 10300 5600 10550 5600 Connection ~ 10300 5600 Wire Wire Line 10550 5600 10800 5600 Connection ~ 10550 5600 Wire Wire Line 10800 5600 11050 5600 Connection ~ 10800 5600 Wire Wire Line 11300 5600 11050 5600 Connection ~ 11050 5600 Wire Wire Line 11300 5600 11550 5600 Connection ~ 11300 5600 Wire Wire Line 11550 5600 11800 5600 Connection ~ 11550 5600 Wire Wire Line 10050 5200 10050 5100 Wire Wire Line 10050 5350 10050 5300 Connection ~ 10050 5200 Connection ~ 10050 5300 Wire Wire Line 10050 5300 10050 5200 Wire Wire Line 10250 3600 10250 4700 Wire Wire Line 10250 4700 11700 4700 Wire Wire Line 11700 4700 11700 5200 Wire Wire Line 11700 5200 11800 5200 Wire Wire Line 11800 5200 11800 5100 Connection ~ 10250 3600 Wire Wire Line 10250 3600 9600 3600 Wire Wire Line 11800 5300 11800 5200 Connection ~ 11800 5200 Wire Wire Line 10200 3700 10200 4650 Wire Wire Line 10200 4650 11450 4650 Wire Wire Line 11450 4650 11450 5200 Wire Wire Line 11450 5200 11550 5200 Connection ~ 10200 3700 Wire Wire Line 10200 3700 10450 3700 Connection ~ 11550 5200 Wire Wire Line 11550 5200 11550 5300 Wire Wire Line 11300 5300 11300 5200 Wire Wire Line 11550 5100 11550 5200 Wire Wire Line 11050 5100 11050 5200 Wire Wire Line 10800 5300 10800 5200 Wire Wire Line 10550 5100 10550 5200 Wire Wire Line 10300 5300 10300 5200 Wire Wire Line 11300 5200 11200 5200 Wire Wire Line 11200 5200 11200 4600 Wire Wire Line 11200 4600 10150 4600 Wire Wire Line 10150 4600 10150 3800 Connection ~ 11300 5200 Wire Wire Line 11300 5200 11300 5100 Connection ~ 10150 3800 Wire Wire Line 10150 3800 9600 3800 Wire Wire Line 10100 3900 10100 4550 Wire Wire Line 10100 4550 10950 4550 Wire Wire Line 10950 4550 10950 5200 Wire Wire Line 10950 5200 11050 5200 Connection ~ 10100 3900 Wire Wire Line 10100 3900 9600 3900 Connection ~ 11050 5200 Wire Wire Line 11050 5200 11050 5300 Wire Wire Line 10800 5200 10700 5200 Wire Wire Line 10700 5200 10700 4500 Wire Wire Line 10700 4500 10050 4500 Wire Wire Line 10050 4500 10050 4000 Connection ~ 10800 5200 Wire Wire Line 10800 5200 10800 5100 Connection ~ 10050 4000 Wire Wire Line 10050 4000 10400 4000 Wire Wire Line 10000 4100 10000 4450 Wire Wire Line 10000 4450 10450 4450 Wire Wire Line 10450 4450 10450 5200 Wire Wire Line 10450 5200 10550 5200 Connection ~ 10000 4100 Wire Wire Line 10000 4100 9600 4100 Connection ~ 10550 5200 Wire Wire Line 10550 5200 10550 5300 Wire Wire Line 10300 5200 10200 5200 Wire Wire Line 10200 5200 10200 4700 Wire Wire Line 10200 4700 9950 4700 Wire Wire Line 9950 4700 9950 4200 Connection ~ 10300 5200 Wire Wire Line 10300 5200 10300 5100 Connection ~ 9950 4200 Wire Wire Line 9950 4200 9600 4200 Wire Wire Line 9900 4300 9900 5200 Connection ~ 9900 4300 Wire Wire Line 9900 4300 9600 4300 Wire Wire Line 9900 5200 10050 5200 Text Notes 4400 7400 0 50 ~ 0 Enable Firmware EPROM\non IO_SELECT low Wire Wire Line 2800 3200 2100 3200 Wire Wire Line 2100 3200 2100 4300 Wire Wire Line 4250 4300 4250 2500 Wire Wire Line 4250 2500 4350 2500 Text Notes 3700 2550 0 50 ~ 0 Direction is\nR/W Inverted Wire Wire Line 2650 4550 4500 4550 Wire Wire Line 5900 2600 7000 2600 Connection ~ 2650 4550 Wire Wire Line 2650 4550 2650 1600 $Comp L 74xx:74LS32 U3 U 1 1 5FB50A31 P 7300 2700 F 0 "U3" H 7300 3025 50 0000 C CNN F 1 "74LS32" H 7300 2934 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 7300 2700 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 7300 2700 50 0001 C CNN 1 7300 2700 1 0 0 -1 $EndComp Wire Wire Line 3300 2400 3600 2400 Wire Wire Line 3600 3100 7000 3100 Wire Wire Line 7000 3100 7000 2800 Wire Wire Line 7600 2700 8400 2700 Wire Wire Line 8600 2700 8600 2600 $Comp L 74xx:74LS32 U3 U 2 1 5FB9C73F P 4800 4450 F 0 "U3" H 4800 4775 50 0000 C CNN F 1 "74LS32" H 4800 4684 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 4800 4450 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 4800 4450 50 0001 C CNN 2 4800 4450 1 0 0 -1 $EndComp Wire Wire Line 4250 4300 4500 4300 Wire Wire Line 4500 4300 4500 4350 Connection ~ 4250 4300 Wire Wire Line 5100 4450 5900 4450 Wire Wire Line 5900 4450 5900 2600 $Comp L 74xx:74LS32 U3 U 3 1 5FBF09C5 P 7400 4500 F 0 "U3" H 7400 4825 50 0000 C CNN F 1 "74LS32" H 7400 4734 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 7400 4500 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 7400 4500 50 0001 C CNN 3 7400 4500 1 0 0 -1 $EndComp Wire Wire Line 8600 4500 8500 4500 Wire Wire Line 7000 4400 7100 4400 Wire Wire Line 7000 3100 7000 4400 Connection ~ 7000 3100 $Comp L 74xx:74LS32 U3 U 4 1 5FC54438 P 4800 4950 F 0 "U3" H 4800 5275 50 0000 C CNN F 1 "74LS32" H 4800 5184 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 4800 4950 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 4800 4950 50 0001 C CNN 4 4800 4950 1 0 0 -1 $EndComp Wire Wire Line 7100 4600 5100 4600 Wire Wire Line 5100 4600 5100 4950 Wire Wire Line 4500 5050 2600 5050 Connection ~ 2600 5050 Wire Wire Line 2600 5050 2600 5700 Text Notes 7600 4950 0 50 ~ 0 Latch Clock on\nR/W low\nA1 low\nDEV_SELECT low Wire Wire Line 4400 4850 4500 4850 Wire Wire Line 4250 4300 4250 4650 Wire Wire Line 4250 4650 3800 4650 Wire Wire Line 3800 4650 3800 4750 Wire Wire Line 2100 4300 3650 4300 Wire Wire Line 3600 2400 3600 3100 Wire Wire Line 8500 4500 8500 6000 Wire Wire Line 8500 6000 14500 6000 Wire Wire Line 14500 6000 14500 2750 Wire Wire Line 14500 2750 13850 2750 Connection ~ 8500 4500 Wire Wire Line 8500 4500 7700 4500 Wire Wire Line 8400 2700 8400 6100 Wire Wire Line 8400 6100 14550 6100 Wire Wire Line 14550 6100 14550 2650 Wire Wire Line 14550 2650 13850 2650 Connection ~ 8400 2700 Wire Wire Line 8400 2700 8600 2700 $Comp L 74xx:74LS00 U2 U 1 1 5FD4E618 P 3850 3500 F 0 "U2" H 3850 3825 50 0000 C CNN F 1 "74LS00" H 3850 3734 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 3850 3500 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 3850 3500 50 0001 C CNN 1 3850 3500 1 0 0 -1 $EndComp Wire Wire Line 3600 3100 3550 3100 Wire Wire Line 3550 3100 3550 3400 Connection ~ 3600 3100 $Comp L 74xx:74LS00 U2 U 2 1 5FD74B7A P 4650 3500 F 0 "U2" H 4650 3825 50 0000 C CNN F 1 "74LS00" H 4650 3734 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 4650 3500 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 4650 3500 50 0001 C CNN 2 4650 3500 1 0 0 -1 $EndComp Wire Wire Line 5150 3900 5150 2900 Wire Wire Line 5150 2900 4850 2900 Wire Wire Line 3300 3900 5150 3900 Wire Wire Line 4150 3500 4350 3500 Wire Wire Line 4350 3500 4350 3400 Wire Wire Line 4350 3600 4350 3500 Connection ~ 4350 3500 Wire Wire Line 4950 3500 4950 2950 Wire Wire Line 4950 2950 4350 2950 Wire Wire Line 4350 2950 4350 2600 Wire Wire Line 2700 4100 3550 4100 Wire Wire Line 3550 4100 3550 3600 Connection ~ 2700 4100 Wire Wire Line 2700 4100 2700 7200 $Comp L 74xx:74LS00 U2 U 3 1 5FE27921 P 4100 4850 F 0 "U2" H 4100 5175 50 0000 C CNN F 1 "74LS00" H 4100 5084 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 4100 4850 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 4100 4850 50 0001 C CNN 3 4100 4850 1 0 0 -1 $EndComp Connection ~ 3800 4750 Wire Wire Line 3800 4750 3800 4950 $Comp L 74xx:74LS00 U2 U 4 1 5FE48B46 P 3950 4300 F 0 "U2" H 3950 4625 50 0000 C CNN F 1 "74LS00" H 3950 4534 50 0000 C CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 3950 4300 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 3950 4300 50 0001 C CNN 4 3950 4300 1 0 0 -1 $EndComp Wire Wire Line 3650 4200 3650 4300 Wire Wire Line 3650 4300 3650 4400 Connection ~ 3650 4300 Text Notes 8500 3000 0 50 ~ 0 Enable on\nR/W high\nA0 low\nDEV_SELECT low Text Notes 4150 2950 0 50 ~ 0 Enable on either\nDEV_SELECT low\nIO_SELECT low $Comp L 74xx:74LS00 U2 U 5 1 5FED8457 P 7250 5850 F 0 "U2" H 7480 5896 50 0000 L CNN F 1 "74LS00" H 7480 5805 50 0000 L CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 7250 5850 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74ls00" H 7250 5850 50 0001 C CNN 5 7250 5850 1 0 0 -1 $EndComp $Comp L 74xx:74LS32 U3 U 5 1 5FEDB516 P 8000 5850 F 0 "U3" H 8230 5896 50 0000 L CNN F 1 "74LS32" H 8230 5805 50 0000 L CNN F 2 "Package_DIP:DIP-14_W7.62mm" H 8000 5850 50 0001 C CNN F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 8000 5850 50 0001 C CNN 5 8000 5850 1 0 0 -1 $EndComp Wire Wire Line 8000 6350 8300 6350 Connection ~ 8300 6350 Wire Wire Line 8300 6350 8300 4900 Wire Wire Line 8000 6350 7700 6350 Connection ~ 8000 6350 Wire Wire Line 8000 5350 7700 5350 Wire Wire Line 7250 5350 6900 5350 Wire Wire Line 5950 5350 5950 5400 Connection ~ 7250 5350 Connection ~ 5950 5400 Wire Wire Line 2800 3800 2750 3800 Wire Wire Line 2750 3800 2750 4000 Wire Wire Line 2750 4000 3400 4000 Wire Wire Line 3400 4000 3400 3800 Wire Wire Line 3400 3800 3300 3800 Wire Wire Line 3300 3700 3450 3700 Wire Wire Line 3450 3700 3450 4050 Wire Wire Line 3450 4050 2050 4050 Wire Wire Line 2050 4050 2050 3700 Wire Wire Line 2050 3700 2800 3700 $Comp L Device:C C3 U 1 1 5FB81404 P 6900 6200 F 0 "C3" H 7015 6246 50 0000 L CNN F 1 "C" H 7015 6155 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 6938 6050 50 0001 C CNN F 3 "~" H 6900 6200 50 0001 C CNN 1 6900 6200 1 0 0 -1 $EndComp $Comp L Device:C C4 U 1 1 5FB82906 P 7700 6200 F 0 "C4" H 7815 6246 50 0000 L CNN F 1 "C" H 7815 6155 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 7738 6050 50 0001 C CNN F 3 "~" H 7700 6200 50 0001 C CNN 1 7700 6200 1 0 0 -1 $EndComp $Comp L Device:C C2 U 1 1 5FB849D8 P 6450 7100 F 0 "C2" H 6565 7146 50 0000 L CNN F 1 "C" H 6565 7055 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 6488 6950 50 0001 C CNN F 3 "~" H 6450 7100 50 0001 C CNN 1 6450 7100 1 0 0 -1 $EndComp $Comp L Device:C C1 U 1 1 5FB85911 P 5300 2600 F 0 "C1" H 5415 2646 50 0000 L CNN F 1 "C" H 5415 2555 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 5338 2450 50 0001 C CNN F 3 "~" H 5300 2600 50 0001 C CNN 1 5300 2600 1 0 0 -1 $EndComp $Comp L Device:C C5 U 1 1 5FB8694D P 9600 2550 F 0 "C5" H 9715 2596 50 0000 L CNN F 1 "C" H 9715 2505 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 9638 2400 50 0001 C CNN F 3 "~" H 9600 2550 50 0001 C CNN 1 9600 2550 1 0 0 -1 $EndComp $Comp L Device:C C6 U 1 1 5FB87862 P 9600 4650 F 0 "C6" H 9715 4696 50 0000 L CNN F 1 "C" H 9715 4605 50 0000 L CNN F 2 "Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm" H 9638 4500 50 0001 C CNN F 3 "~" H 9600 4650 50 0001 C CNN 1 9600 4650 1 0 0 -1 $EndComp Connection ~ 9600 2900 Wire Wire Line 9600 2900 10650 2900 Wire Wire Line 9600 2700 9600 2900 Wire Wire Line 10700 1700 9600 1700 Wire Wire Line 9100 1250 9700 1250 Wire Wire Line 9700 1250 9700 2400 Wire Wire Line 9700 2400 9600 2400 Connection ~ 9700 1250 Wire Wire Line 9700 1250 12850 1250 Wire Wire Line 9650 3300 9650 4400 Wire Wire Line 9650 4400 9600 4400 Wire Wire Line 9600 4400 9600 4500 Connection ~ 9650 3300 Wire Wire Line 9650 3300 10600 3300 Wire Wire Line 9600 4900 9100 4900 Wire Wire Line 9600 4800 9600 4900 Connection ~ 7700 6350 Wire Wire Line 7700 6350 7250 6350 Wire Wire Line 7700 6050 7700 5350 Connection ~ 7700 5350 Wire Wire Line 7700 5350 7250 5350 Wire Wire Line 7250 6350 6900 6350 Connection ~ 7250 6350 Wire Wire Line 6900 6050 6900 5350 Connection ~ 6900 5350 Wire Wire Line 6900 5350 6750 5350 Wire Wire Line 6450 7250 6450 7500 Connection ~ 6450 7500 Wire Wire Line 6450 7500 8300 7500 Wire Wire Line 6450 6950 6450 6400 Wire Wire Line 6450 6400 6750 6400 Wire Wire Line 6750 6400 6750 5350 Connection ~ 6750 5350 Wire Wire Line 6750 5350 5950 5350 Wire Wire Line 5150 2900 5300 2900 Wire Wire Line 5300 2900 5300 2750 Connection ~ 5150 2900 Wire Wire Line 5300 2450 5400 2450 Connection ~ 5400 2450 Wire Wire Line 5400 2450 5400 3300 $EndSCHEMATC