EESchema Schematic File Version 2 date 17/11/2012 12:11:23 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 "17 nov 2012" Rev "" Comp "Ram7" Comment1 "Retro analyzed from PCB" Comment2 "" Comment3 "" Comment4 "" $EndDescr Wire Wire Line 6950 4250 7200 4250 Connection ~ 8400 3550 Wire Wire Line 2000 1950 2000 1900 Wire Wire Line 2000 1900 1800 1900 Wire Wire Line 1800 1900 1800 1950 Connection ~ 3450 2750 Wire Wire Line 3450 2750 3450 2150 Wire Wire Line 3450 2150 2900 2150 Wire Wire Line 1900 2050 2000 2050 Wire Wire Line 1900 1750 2000 1750 Wire Wire Line 3450 1050 3250 1050 Wire Wire Line 2950 3700 2700 3700 Wire Wire Line 5950 4350 5700 4350 Wire Wire Line 4500 4250 4250 4250 Wire Wire Line 2950 3500 2750 3500 Wire Wire Line 2850 3400 2950 3400 Wire Wire Line 5300 3350 5600 3350 Wire Wire Line 8800 2750 9050 2750 Connection ~ 8650 4400 Wire Wire Line 9300 4400 8300 4400 Wire Wire Line 1550 2800 1550 2750 Wire Wire Line 1550 2750 1350 2750 Connection ~ 1650 3300 Connection ~ 7100 3650 Connection ~ 9000 4000 Wire Wire Line 9000 3950 9000 4000 Wire Wire Line 7200 1100 7200 950 Wire Wire Line 7100 1100 7100 950 Wire Wire Line 7000 1100 7000 950 Wire Wire Line 6900 1100 6900 950 Wire Wire Line 6800 1100 6800 950 Wire Wire Line 6700 1100 6700 950 Wire Bus Line 900 5050 900 4350 Wire Wire Line 8150 2450 7950 2450 Wire Wire Line 8150 2350 7950 2350 Wire Wire Line 8150 2250 7950 2250 Wire Wire Line 8150 2150 7950 2150 Wire Wire Line 8150 2050 7950 2050 Wire Wire Line 8150 1950 7950 1950 Wire Wire Line 8150 1850 7950 1850 Wire Wire Line 8150 1750 7950 1750 Wire Wire Line 8150 1650 7950 1650 Wire Wire Line 8150 1550 7950 1550 Wire Wire Line 8150 1450 7950 1450 Wire Wire Line 8150 1350 7950 1350 Wire Wire Line 8150 1250 7950 1250 Wire Wire Line 8150 1150 7950 1150 Wire Wire Line 8150 1050 7950 1050 Wire Wire Line 8150 950 7950 950 Wire Wire Line 8150 850 7950 850 Wire Wire Line 8150 750 7950 750 Wire Wire Line 8150 650 7950 650 Wire Bus Line 6100 750 5400 750 Wire Wire Line 6100 1100 6100 950 Wire Wire Line 5900 1100 5900 950 Wire Wire Line 5700 1100 5700 950 Wire Wire Line 5500 1100 5500 950 Wire Wire Line 6400 1100 6400 800 Wire Wire Line 6200 1100 6200 800 Wire Wire Line 6500 1900 6500 2200 Wire Wire Line 6400 1900 6400 2200 Wire Wire Line 6300 1900 6300 2200 Wire Bus Line 6200 2200 6500 2200 Connection ~ 2650 5050 Connection ~ 2650 4950 Connection ~ 2650 4850 Connection ~ 2650 4750 Connection ~ 2650 4650 Connection ~ 2650 4550 Connection ~ 2650 4450 Connection ~ 2650 4350 Wire Wire Line 1050 5050 900 5050 Wire Wire Line 1050 4950 900 4950 Wire Wire Line 1050 4850 900 4850 Wire Wire Line 1050 4750 900 4750 Wire Wire Line 1050 4650 900 4650 Wire Wire Line 1050 4550 900 4550 Wire Wire Line 1050 4450 900 4450 Wire Wire Line 1050 4350 900 4350 Wire Wire Line 8900 3550 9050 3550 Wire Wire Line 7600 1100 7600 950 Wire Wire Line 7400 1100 7400 950 Wire Wire Line 5300 1900 5300 2100 Wire Wire Line 7000 1900 7000 2100 Wire Wire Line 7200 1900 7200 2100 Wire Wire Line 7500 1900 7500 2100 Wire Wire Line 5950 2950 6150 2950 Wire Wire Line 7800 2150 7700 2150 Wire Wire Line 7700 2150 7700 1900 Wire Wire Line 5950 2750 6150 2750 Wire Wire Line 900 5250 1050 5250 Wire Wire Line 2450 4650 2650 4650 Wire Wire Line 2450 4550 2650 4550 Wire Wire Line 2450 4450 2650 4450 Wire Wire Line 2450 4350 2650 4350 Wire Wire Line 2450 4950 2650 4950 Wire Wire Line 2450 4750 2650 4750 Wire Wire Line 2450 4850 2650 4850 Wire Wire Line 2450 5050 2650 5050 Wire Wire Line 1050 5350 900 5350 Wire Wire Line 900 5350 900 5400 Wire Wire Line 6800 2150 6800 1900 Wire Wire Line 6900 2150 6900 1900 Wire Wire Line 7600 1900 7600 2100 Wire Wire Line 7300 1900 7300 2100 Wire Wire Line 7100 1900 7100 2100 Wire Wire Line 6700 1900 6700 2100 Wire Wire Line 5300 1100 5300 950 Wire Wire Line 7500 1100 7500 950 Wire Wire Line 7700 1100 7700 950 Wire Wire Line 6800 3450 7100 3450 Wire Wire Line 8300 3550 8500 3550 Wire Wire Line 7400 2100 7400 1900 Wire Wire Line 6200 1900 6200 2200 Wire Bus Line 6200 800 6500 800 Wire Wire Line 6300 1100 6300 800 Wire Wire Line 6500 1100 6500 800 Wire Wire Line 5400 1100 5400 950 Wire Wire Line 5600 1100 5600 950 Wire Wire Line 5800 1100 5800 950 Wire Wire Line 6000 1100 6000 950 Wire Wire Line 5400 1900 5400 2050 Wire Wire Line 5500 1900 5500 2050 Wire Wire Line 5600 1900 5600 2050 Wire Wire Line 5700 1900 5700 2050 Wire Wire Line 5800 1900 5800 2050 Wire Wire Line 5900 1900 5900 2050 Wire Wire Line 6000 1900 6000 2050 Wire Wire Line 6100 1900 6100 2050 Wire Bus Line 6100 2200 5400 2200 Wire Wire Line 6600 2100 6600 1900 Wire Wire Line 7300 1100 7300 900 Wire Wire Line 6600 1100 6600 950 Wire Wire Line 9000 4550 9000 4400 Connection ~ 9000 4400 Wire Wire Line 1650 3300 1150 3300 Wire Wire Line 7100 3450 7100 3650 Connection ~ 1150 3100 Connection ~ 1350 3300 Wire Wire Line 1350 2750 1350 2800 Wire Wire Line 9300 4000 8300 4000 Connection ~ 8650 4000 Wire Wire Line 7350 2850 7600 2850 Wire Wire Line 7450 2650 7600 2650 Wire Wire Line 1150 3300 1150 3100 Wire Wire Line 5600 3550 4150 3550 Wire Wire Line 4250 4800 4250 4500 Wire Wire Line 4250 4500 3050 4500 Wire Wire Line 3050 4500 3050 4350 Wire Wire Line 4250 5250 4500 5250 Wire Wire Line 4500 5250 4500 4450 Wire Wire Line 2950 3600 2700 3600 Wire Wire Line 1850 900 2050 900 Wire Wire Line 3400 2750 3650 2750 Wire Wire Line 1800 1950 1700 1950 Wire Wire Line 1900 2250 2000 2250 Wire Wire Line 4600 2250 4600 2150 $Comp L GND #PWR01 U 1 1 5066EDF0 P 4600 2250 F 0 "#PWR01" H 4600 2250 30 0001 C CNN F 1 "GND" H 4600 2180 30 0001 C CNN 1 4600 2250 1 0 0 -1 $EndComp Text Label 4000 2150 1 60 ~ 0 BUSRESET $Comp L SW_PUSH SW4 U 1 1 5066EDE6 P 4300 2150 F 0 "SW4" H 4450 2260 50 0000 C CNN F 1 "SW_PUSH" H 4300 2070 50 0000 C CNN 1 4300 2150 1 0 0 -1 $EndComp $Comp L GND #PWR02 U 1 1 5066ED17 P 7700 4250 F 0 "#PWR02" H 7700 4250 30 0001 C CNN F 1 "GND" H 7700 4180 30 0001 C CNN 1 7700 4250 0 -1 -1 0 $EndComp $Comp L R R5 U 1 1 5066ED0E P 7450 4250 F 0 "R5" V 7530 4250 50 0000 C CNN F 1 "10KR" V 7450 4250 50 0000 C CNN 1 7450 4250 0 -1 -1 0 $EndComp Text Label 7200 950 1 60 ~ 0 BUSRESET $Comp L SWITCH_DSDP SW1 U 1 1 5059F50B P 2450 2000 F 0 "SW1" H 2450 2300 60 0000 C CNN F 1 "WRITE" H 2450 1650 60 0000 C CNN 1 2450 2000 -1 0 0 1 $EndComp Text Label 2900 1850 0 60 ~ 0 RDWR Text GLabel 1900 1750 0 60 Output ~ 0 ROMEN Text GLabel 1700 1950 0 60 Output ~ 0 MREQ $Comp L GND #PWR03 U 1 1 5058E1E2 P 1900 2250 F 0 "#PWR03" H 1900 2250 30 0001 C CNN F 1 "GND" H 1900 2180 30 0001 C CNN 1 1900 2250 0 1 1 0 $EndComp $Comp L VCC #PWR04 U 1 1 5058E1DA P 1900 2050 F 0 "#PWR04" H 1900 2150 30 0001 C CNN F 1 "VCC" H 1900 2150 30 0000 C CNN 1 1900 2050 1 0 0 -1 $EndComp $Comp L VCC #PWR05 U 1 1 5058E15E P 2500 2750 F 0 "#PWR05" 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 R1 U 1 1 5058E156 P 2750 2750 F 0 "R1" 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 D1 U 1 1 5058E14C P 3200 2750 F 0 "D1" 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 R3 U 1 1 5058E134 P 3900 2750 F 0 "R3" 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 #PWR06 U 1 1 5058E0FB P 3450 1250 F 0 "#PWR06" 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 #PWR07 U 1 1 5058E067 P 5950 4150 F 0 "#PWR07" 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="SW2" Part="1" F 0 "SW2" H 3750 1300 50 0000 C CNN F 1 "ROM7" H 3800 1000 50 0000 C CNN 1 3950 1150 -1 0 0 1 $EndComp $Comp L SWITCH_INV SW3 U 1 1 5058E041 P 6450 4250 F 0 "SW3" H 6250 4400 50 0000 C CNN F 1 "ROM0" 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 #PWR08 U 1 1 5058D352 P 8400 3050 F 0 "#PWR08" 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 R4 U 1 1 5058D332 P 8400 3300 F 0 "R4" 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 $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 #PWR09 U 1 1 4DDEB8E8 P 9300 2350 F 0 "#PWR09" 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 #PWR010 U 1 1 4DC04C38 P 1550 2800 F 0 "#PWR010" 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 #PWR011 U 1 1 4DBD3AB8 P 9000 4550 F 0 "#PWR011" 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 #PWR012 U 1 1 4DBD3AB1 P 9000 3950 F 0 "#PWR012" 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 ~ 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 #PWR013 U 1 1 4DBBEA82 P 6600 2100 F 0 "#PWR013" 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 #PWR014 U 1 1 4DBBE106 P 9300 2450 F 0 "#PWR014" 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 #PWR015 U 1 1 4CA89326 P 7800 2150 F 0 "#PWR015" 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 #PWR016 U 1 1 4CA88AFC P 900 5400 F 0 "#PWR016" 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