X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=z80comp2;a=blobdiff_plain;f=hw%2Fz80comp2.sch;fp=hw%2Fz80comp2.sch;h=9c74d014498440d9c977bff757ca3357d54a9924;hp=0000000000000000000000000000000000000000;hb=a0a85eb847ff3bb5da13e78618efdcd1b9f588cf;hpb=b55f31d1ac4a1991f2ad7b2d17be06969ea25e47 diff --git a/hw/z80comp2.sch b/hw/z80comp2.sch new file mode 100644 index 0000000..9c74d01 --- /dev/null +++ b/hw/z80comp2.sch @@ -0,0 +1,1741 @@ +EESchema Schematic File Version 4 +EELAYER 30 0 +EELAYER END +$Descr A4 11693 8268 +encoding utf-8 +Sheet 1 1 +Title "Z80 computer 2" +Date "2020-04-29" +Rev "" +Comp "" +Comment1 "License: Creative Commons Attribution Share-Alike (CC BY-SA)" +Comment2 "Copyright (C) 2020 John Tsiombikas " +Comment3 "" +Comment4 "" +$EndDescr +$Comp +L CPU:Z80CPU U3 +U 1 1 5EA29512 +P 2000 4050 +F 0 "U3" H 2200 2650 50 0000 C CNN +F 1 "Z80CPU" H 2000 4050 50 0000 C CNN +F 2 "" H 2000 4450 50 0001 C CNN +F 3 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1850 +F 0 "#PWR06" H 1850 1600 50 0001 C CNN +F 1 "GND" H 1855 1677 50 0000 C CNN +F 2 "" H 1850 1850 50 0001 C CNN +F 3 "" H 1850 1850 50 0001 C CNN + 1 1850 1850 + 1 0 0 -1 +$EndComp +$Comp +L Timer:LM555 U2 +U 1 1 5F85DCB5 +P 1850 1450 +F 0 "U2" H 2000 1800 50 0000 C CNN +F 1 "LM555" H 1850 1450 50 0000 C CNN +F 2 "" H 1850 1450 50 0001 C CNN +F 3 "http://www.ti.com/lit/ds/symlink/lm555.pdf" H 1850 1450 50 0001 C CNN + 1 1850 1450 + 1 0 0 -1 +$EndComp +$Comp +L 74xx:74LS05 U4 +U 1 1 5F9CB042 +P 2450 800 +F 0 "U4" H 2450 650 50 0000 C CNN +F 1 "74LS05" H 2550 950 50 0000 C CNN +F 2 "" H 2450 800 50 0001 C CNN +F 3 "http://www.ti.com/lit/gpn/sn74LS05" H 2450 800 50 0001 C CNN + 1 2450 800 + 1 0 0 -1 +$EndComp +Wire Wire Line + 2150 800 2150 1050 +Wire Wire Line + 2150 1050 2550 1050 +Wire Wire Line + 2550 1050 2550 1250 +Text Label 2850 800 0 50 ~ 0 +~RST +$Comp +L Device:R R4 +U 1 1 5FA0761C +P 1050 2700 +F 0 "R4" H 1120 2746 50 0000 L CNN +F 1 "4.7k" V 1050 2600 50 0000 L CNN +F 2 "" V 980 2700 50 0001 C CNN +F 3 "~" H 1050 2700 50 0001 C CNN + 1 1050 2700 + 1 0 0 -1 +$EndComp +Text Notes 1350 700 0 50 ~ 0 +Power-on reset +Wire Wire Line + 2750 800 3000 800 +Wire Wire Line + 1050 2850 1300 2850 +Wire Wire Line + 1050 2550 2000 2550 +Connection ~ 2000 2550 +Connection ~ 2700 1650 +Connection ~ 1850 1850 +$Comp +L Device:C_Small C1 +U 1 1 5FC80F1C +P 1200 1700 +F 0 "C1" H 1109 1654 50 0000 R CNN +F 1 "0.1uF" H 1109 1745 50 0000 R CNN +F 2 "" H 1200 1700 50 0001 C CNN +F 3 "~" H 1200 1700 50 0001 C CNN + 1 1200 1700 + 1 0 0 1 +$EndComp +Wire Wire Line + 1200 1800 1200 1850 +Wire Wire Line + 1200 1850 1850 1850 +Wire Wire Line + 1200 1600 1200 1250 +NoConn ~ 1300 5250 +NoConn ~ 1300 4150 +Wire Wire Line + 1300 3850 1100 3850 +Text Label 1200 3850 0 50 ~ 0 +~M1 +Wire Wire Line + 1300 3950 1100 3950 +Text Label 1100 3950 0 50 ~ 0 +~RFSH +Connection ~ 4700 2600 +Wire Bus Line + 4600 2600 4700 2600 +Wire Bus Line + 4700 2600 6350 2600 +Wire Bus Line + 3150 2600 4700 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CNN +F 1 "VCC" H 5117 1173 50 0000 C CNN +F 2 "" H 5100 1000 50 0001 C CNN +F 3 "" H 5100 1000 50 0001 C CNN + 1 5100 1000 + 1 0 0 -1 +$EndComp +$Comp +L 74xx:74HC14 U1 +U 4 1 5FF485F0 +P 6200 1300 +F 0 "U1" H 6150 1450 50 0000 L CNN +F 1 "74HC14" H 6150 1150 50 0000 L CNN +F 2 "" H 6200 1300 50 0001 C CNN +F 3 "http://www.ti.com/lit/gpn/sn74HC14" H 6200 1300 50 0001 C CNN + 4 6200 1300 + 1 0 0 -1 +$EndComp +Wire Wire Line + 6500 1300 6800 1300 +Wire Wire Line + 5000 1300 5100 1300 +Wire Wire Line + 5100 1200 5100 1300 +Wire Bus Line + 6350 2600 6350 3200 +Wire Bus Line + 3000 1100 3000 2600 +Wire Bus Line + 6400 3400 6400 4400 +Wire Bus Line + 4550 3600 4550 5850 +Wire Bus Line + 3000 4650 3000 5850 +Wire Bus Line + 3150 2600 3150 4800 +Wire Bus Line + 4700 2600 4700 4600 +Wire Bus Line + 3000 2600 3000 4250 +Connection ~ 5100 1300 +Wire Wire Line + 5100 1300 5300 1300 +Text Notes 5350 950 0 50 ~ 0 +Delay the UART ~CS~ for a few ns to bring the\ntiming between R/~W~ and ~CS~ within spec\n(this might have been a red herring and not necessary) +$EndSCHEMATC