1 EESchema Schematic File Version 4 2 LIBS:AcornElectronMainboard-cache 3 EELAYER 26 0 4 EELAYER END 5 $Descr A4 11693 8268 6 encoding utf-8 7 Sheet 3 9 8 Title "" 9 Date "" 10 Rev "" 11 Comp "" 12 Comment1 "" 13 Comment2 "" 14 Comment3 "" 15 Comment4 "" 16 $EndDescr 17 $Comp 18 L DRAM:4164 IC4 19 U 1 1 61D7F23A 20 P 2350 2650 21 F 0 "IC4" H 2350 3225 50 0000 C CNN 22 F 1 "4164" H 2350 3134 50 0000 C CNN 23 F 2 "" H 2300 2650 50 0001 C CNN 24 F 3 "" H 2300 2650 50 0001 C CNN 25 1 2350 2650 26 1 0 0 -1 27 $EndComp 28 $Comp 29 L DRAM:4164 IC5 30 U 1 1 61D7F241 31 P 3750 2650 32 F 0 "IC5" H 3750 3225 50 0000 C CNN 33 F 1 "4164" H 3750 3134 50 0000 C CNN 34 F 2 "" H 3700 2650 50 0001 C CNN 35 F 3 "" H 3700 2650 50 0001 C CNN 36 1 3750 2650 37 1 0 0 -1 38 $EndComp 39 $Comp 40 L DRAM:4164 IC6 41 U 1 1 61D7F248 42 P 5150 2650 43 F 0 "IC6" H 5150 3225 50 0000 C CNN 44 F 1 "4164" H 5150 3134 50 0000 C CNN 45 F 2 "" H 5100 2650 50 0001 C CNN 46 F 3 "" H 5100 2650 50 0001 C CNN 47 1 5150 2650 48 1 0 0 -1 49 $EndComp 50 $Comp 51 L DRAM:4164 IC7 52 U 1 1 61D7F24F 53 P 6550 2650 54 F 0 "IC7" H 6550 3225 50 0000 C CNN 55 F 1 "4164" H 6550 3134 50 0000 C CNN 56 F 2 "" H 6500 2650 50 0001 C CNN 57 F 3 "" H 6500 2650 50 0001 C CNN 58 1 6550 2650 59 1 0 0 -1 60 $EndComp 61 Entry Wire Line 62 1700 2600 1800 2700 63 Entry Wire Line 64 1700 2700 1800 2800 65 Entry Wire Line 66 1700 2800 1800 2900 67 Connection ~ 3000 3300 68 Wire Bus Line 69 3000 3300 1700 3300 70 Entry Wire Line 71 2900 2600 3000 2700 72 Entry Wire Line 73 2900 2700 3000 2800 74 Entry Wire Line 75 2900 2800 3000 2900 76 Entry Wire Line 77 2900 2900 3000 3000 78 Entry Wire Line 79 2900 3000 3000 3100 80 Connection ~ 3100 3300 81 Wire Bus Line 82 3100 3300 3000 3300 83 Entry Wire Line 84 3100 2600 3200 2700 85 Entry Wire Line 86 3100 2700 3200 2800 87 Entry Wire Line 88 3100 2800 3200 2900 89 Entry Wire Line 90 4300 2600 4400 2700 91 Entry Wire Line 92 4300 2700 4400 2800 93 Entry Wire Line 94 4300 2800 4400 2900 95 Entry 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