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3fe353db2e
pato-z80-home-computer/pat80-computer/hardware/schematics/pat80/pat80.sch-bak
Daniele Verducci (ZenPenguin) 3fe353db2e Memory decoding, WIP IO decoding
2021-03-19 08:58:05 +01:00

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EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text Notes 12250 10950 0 79 ~ 0
Pat80 Z80 home computer
Text Notes 13000 11050 0 50 ~ 0
2021-03-15
$Comp
L Memory_EEPROM:28C256 U3
U 1 1 604F6B81
P 8600 5700
F 0 "U3" V 8646 4556 50 0000 R CNN
F 1 "256k (32k x 8) EEPROM" V 8555 4556 50 0000 R CNN
F 2 "" H 8600 5700 50 0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 8600 5700 50 0001 C CNN
1 8600 5700
0 -1 -1 0
$EndComp
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Bus Line
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Connection ~ 10350 6650
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Entry Wire Line
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$Comp
L Memory_EEPROM:28C256 U4
U 1 1 604FD5C5
P 8600 7250
F 0 "U4" V 8646 6106 50 0000 R CNN
F 1 "256k (32k x 8) SRAM" V 8555 6106 50 0000 R CNN
F 2 "" H 8600 7250 50 0001 C CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf" H 8600 7250 50 0001 C CNN
1 8600 7250
0 -1 -1 0
$EndComp
$Comp
L power:GND #PWR?
U 1 1 60507104
P 9700 5700
F 0 "#PWR?" H 9700 5450 50 0001 C CNN
F 1 "GND" H 9705 5527 50 0000 C CNN
F 2 "" H 9700 5700 50 0001 C CNN
F 3 "" H 9700 5700 50 0001 C CNN
1 9700 5700
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6050737A
P 9700 7250
F 0 "#PWR?" H 9700 7000 50 0001 C CNN
F 1 "GND" H 9705 7077 50 0000 C CNN
F 2 "" H 9700 7250 50 0001 C CNN
F 3 "" H 9700 7250 50 0001 C CNN
1 9700 7250
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$EndComp
$Comp
L power:GND #PWR?
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F 0 "#PWR?" H 4900 7900 50 0001 C CNN
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1 4900 8150
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$EndComp
$Comp
L power:VCC #PWR?
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1 4900 4650
1 0 0 -1
$EndComp
$Comp
L power:VCC #PWR?
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F 3 "" H 7500 5700 50 0001 C CNN
1 7500 5700
1 0 0 -1
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 605080EF
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1 7500 7250
1 0 0 -1
$EndComp
$Comp
L power:VCC #PWR?
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$EndComp
$Comp
L CPU:Z80CPU U1
U 1 1 604F040E
P 4900 6650
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F 2 "" H 4900 7050 50 0001 C CNN
F 3 "www.zilog.com/manage_directlink.php?filepath=docs/z80/um0080" H 4900 7050 50 0001 C CNN
1 4900 6650
1 0 0 -1
$EndComp
Wire Wire Line
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$Comp
L power:VCC #PWR?
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1 4050 6650
1 0 0 -1
$EndComp
$Comp
L Device:C C?
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1 5300 4650
0 1 1 0
$EndComp
$Comp
L Device:C C?
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1 5300 4850
0 1 1 0
$EndComp
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L power:GND #PWR?
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$EndComp
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Wire Wire Line
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Connection ~ 4900 4750
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Text Notes 15450 11050 0 50 ~ 0
0.1 alpha
$Comp
L 74xx:74HC04 U11
U 6 1 605236EF
P 2950 4850
F 0 "U11" V 2904 5030 50 0000 L CNN
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F 2 "" H 2950 4850 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 2950 4850 50 0001 C CNN
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0 1 1 0
$EndComp
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Wire Wire Line
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$Comp
L Device:R R?
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F 0 "R?" H 4420 4396 50 0000 L CNN
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1 4350 4350
0 1 1 0
$EndComp
Text Notes 3300 4150 0 50 ~ 0
Reset circuit with\ndebouncing and\npower-on-reset
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Wire Wire Line
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Wire Wire Line
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$Comp
L power:GND #PWR?
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$EndComp
$Comp
L power:VCC #PWR?
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F 1 "VCC" H 4667 4523 50 0000 C CNN
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1 4650 4350
1 0 0 -1
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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$Comp
L Device:C C?
U 1 1 6052B4C4
P 3800 4700
F 0 "C?" H 3915 4746 50 0000 L CNN
F 1 "10uF" H 3915 4655 50 0000 L CNN
F 2 "" H 3838 4550 50 0001 C CNN
F 3 "~" H 3800 4700 50 0001 C CNN
1 3800 4700
0 1 1 0
$EndComp
$Comp
L Switch:SW_Push SW1
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F 0 "SW1" V 3800 4302 50 0000 R CNN
F 1 "SW_Push" V 3755 4302 50 0001 R CNN
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F 3 "" H 3800 4550 50 0001 C CNN
1 3800 4350
1 0 0 -1
$EndComp
$Comp
L 74xx:74LS32 U10
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P 4100 5100
F 0 "U10" H 4100 5425 50 0000 C CNN
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4 4100 5100
0 1 1 0
$EndComp
$Comp
L Device:C C?
U 1 1 605648D0
P 1850 4550
F 0 "C?" V 1598 4550 50 0000 C CNN
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F 3 "~" H 1850 4550 50 0001 C CNN
1 1850 4550
0 1 1 0
$EndComp
$Comp
L Device:C C?
U 1 1 60567676
P 1850 5150
F 0 "C?" V 1598 5150 50 0000 C CNN
F 1 "30pF" V 1689 5150 50 0000 C CNN
F 2 "" H 1888 5000 50 0001 C CNN
F 3 "~" H 1850 5150 50 0001 C CNN
1 1850 5150
0 1 1 0
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6056B22E
P 1600 4550
F 0 "#PWR?" H 1600 4300 50 0001 C CNN
F 1 "GND" H 1605 4377 50 0000 C CNN
F 2 "" H 1600 4550 50 0001 C CNN
F 3 "" H 1600 4550 50 0001 C CNN
1 1600 4550
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6056C411
P 1600 5150
F 0 "#PWR?" H 1600 4900 50 0001 C CNN
F 1 "GND" H 1605 4977 50 0000 C CNN
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F 3 "" H 1600 5150 50 0001 C CNN
1 1600 5150
1 0 0 -1
$EndComp
Wire Wire Line
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Wire Wire Line
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$Comp
L Device:R R?
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P 2150 4850
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F 3 "~" H 2150 4850 50 0001 C CNN
1 2150 4850
1 0 0 -1
$EndComp
$Comp
L Device:Crystal Y?
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P 2500 4850
F 0 "Y?" V 2454 4981 50 0000 L CNN
F 1 "4Mhz" V 2545 4981 50 0000 L CNN
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0 1 1 0
$EndComp
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Wire Wire Line
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Wire Wire Line
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Connection ~ 2150 4550
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 2150 5150
Wire Wire Line
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Wire Wire Line
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Connection ~ 2500 5150
Wire Wire Line
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Text Notes 2100 5350 0 50 ~ 0
System clock\n 4Mhz
$Comp
L 74xx:74HC04 U11
U 5 1 605A807A
P 2950 5450
F 0 "U11" V 2904 5630 50 0000 L CNN
F 1 "74LS32" V 2995 5630 50 0000 L CNN
F 2 "" H 2950 5450 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 2950 5450 50 0001 C CNN
5 2950 5450
0 1 1 0
$EndComp
Wire Wire Line
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Connection ~ 2950 5150
Wire Wire Line
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$Comp
L Device:C C?
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F 0 "C?" V 6848 5800 50 0000 C CNN
F 1 "100nF" V 6939 5800 50 0000 C CNN
F 2 "" H 7138 5650 50 0001 C CNN
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1 7100 5800
0 -1 -1 0
$EndComp
$Comp
L Device:C C?
U 1 1 606345B4
P 7100 5600
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0 -1 -1 0
$EndComp
Wire Wire Line
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$Comp
L power:GND #PWR?
U 1 1 606345BB
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F 0 "#PWR?" H 6850 5450 50 0001 C CNN
F 1 "GND" H 6855 5527 50 0000 C CNN
F 2 "" H 6850 5700 50 0001 C CNN
F 3 "" H 6850 5700 50 0001 C CNN
1 6850 5700
-1 0 0 1
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 7250 5700
Wire Wire Line
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Text Notes 7350 5450 2 50 ~ 0
Smoothing caps
$Comp
L Device:C C?
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P 7250 7350
F 0 "C?" V 6998 7350 50 0000 C CNN
F 1 "100nF" V 7089 7350 50 0000 C CNN
F 2 "" H 7288 7200 50 0001 C CNN
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1 7250 7350
0 -1 -1 0
$EndComp
$Comp
L Device:C C?
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P 7250 7150
F 0 "C?" V 6998 7150 50 0000 C CNN
F 1 "56pF" V 7089 7150 50 0000 C CNN
F 2 "" H 7288 7000 50 0001 C CNN
F 3 "~" H 7250 7150 50 0001 C CNN
1 7250 7150
0 -1 -1 0
$EndComp
Wire Wire Line
7100 7350 7100 7250
$Comp
L power:GND #PWR?
U 1 1 60649CB5
P 7000 7250
F 0 "#PWR?" H 7000 7000 50 0001 C CNN
F 1 "GND" H 7005 7077 50 0000 C CNN
F 2 "" H 7000 7250 50 0001 C CNN
F 3 "" H 7000 7250 50 0001 C CNN
1 7000 7250
-1 0 0 1
$EndComp
Wire Wire Line
7000 7250 7100 7250
Connection ~ 7100 7250
Wire Wire Line
7100 7250 7100 7150
Wire Wire Line
7400 7150 7400 7250
Wire Wire Line
7400 7250 7500 7250
Connection ~ 7400 7250
Wire Wire Line
7400 7250 7400 7350
Connection ~ 7500 7250
$Comp
L Device:R R?
U 1 1 60661B57
P 2500 6050
F 0 "R?" V 2293 6050 50 0000 C CNN
F 1 "10k" V 2384 6050 50 0000 C CNN
F 2 "" V 2430 6050 50 0001 C CNN
F 3 "~" H 2500 6050 50 0001 C CNN
1 2500 6050
0 1 1 0
$EndComp
$Comp
L Device:R R?
U 1 1 60662809
P 2200 6150
F 0 "R?" V 1993 6150 50 0000 C CNN
F 1 "10k" V 2084 6150 50 0000 C CNN
F 2 "" V 2130 6150 50 0001 C CNN
F 3 "~" H 2200 6150 50 0001 C CNN
1 2200 6150
0 1 1 0
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60663175
P 2050 5800
F 0 "#PWR?" H 2050 5650 50 0001 C CNN
F 1 "VCC" H 2067 5973 50 0000 C CNN
F 2 "" H 2050 5800 50 0001 C CNN
F 3 "" H 2050 5800 50 0001 C CNN
1 2050 5800
1 0 0 -1
$EndComp
Wire Wire Line
2050 5800 2050 6050
Wire Wire Line
2350 6050 2050 6050
Connection ~ 2050 6050
Wire Wire Line
2050 6050 2050 6150
Wire Wire Line
2650 6050 4200 6050
Wire Wire Line
2350 6150 3050 6150
$Comp
L Switch:SW_Push SW?
U 1 1 6067F418
P 1600 6250
F 0 "SW?" H 1600 6535 50 0000 C CNN
F 1 "Break" H 1600 6444 50 0000 C CNN
F 2 "" H 1600 6450 50 0001 C CNN
F 3 "" H 1600 6450 50 0001 C CNN
1 1600 6250
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 60681E2A
P 1300 6250
F 0 "#PWR?" H 1300 6000 50 0001 C CNN
F 1 "GND" H 1305 6077 50 0000 C CNN
F 2 "" H 1300 6250 50 0001 C CNN
F 3 "" H 1300 6250 50 0001 C CNN
1 1300 6250
1 0 0 -1
$EndComp
$Comp
L Device:C C?
U 1 1 6068233C
P 1600 5800
F 0 "C?" V 1348 5800 50 0000 C CNN
F 1 "10uF" V 1439 5800 50 0000 C CNN
F 2 "" H 1638 5650 50 0001 C CNN
F 3 "~" H 1600 5800 50 0001 C CNN
1 1600 5800
0 1 1 0
$EndComp
Wire Wire Line
1450 5800 1400 5800
Wire Wire Line
1400 5800 1400 6250
Wire Wire Line
1300 6250 1400 6250
Connection ~ 1400 6250
Wire Wire Line
1750 5800 1800 5800
Wire Wire Line
1800 5800 1800 6250
Wire Wire Line
1800 6250 3050 6250
Wire Wire Line
3050 6250 3050 6150
Connection ~ 1800 6250
Connection ~ 3050 6150
Wire Wire Line
3050 6150 4200 6150
Text Notes 1250 6700 0 50 ~ 0
"Break" button
$Comp
L Connector:Conn_01x01_Male J?
U 1 1 606A5B44
P 4100 3900
F 0 "J?" V 4162 3944 50 0000 L CNN
F 1 "panel_btn_rst" V 4253 3944 50 0000 L CNN
F 2 "" H 4100 3900 50 0001 C CNN
F 3 "~" H 4100 3900 50 0001 C CNN
1 4100 3900
0 1 1 0
$EndComp
Wire Wire Line
4100 4100 4100 4350
$Comp
L Connector:Conn_01x01_Male J?
U 1 1 606C1179
P 1800 6550
F 0 "J?" V 1954 6462 50 0000 R CNN
F 1 "panel_btn_brk" V 1863 6462 50 0000 R CNN
F 2 "" H 1800 6550 50 0001 C CNN
F 3 "~" H 1800 6550 50 0001 C CNN
1 1800 6550
0 -1 -1 0
$EndComp
Wire Wire Line
1800 6350 1800 6250
$Comp
L Device:LED D?
U 1 1 606D4ECC
P 3050 6750
F 0 "D?" H 3043 6495 50 0000 C CNN
F 1 "LED" H 3043 6586 50 0000 C CNN
F 2 "" H 3050 6750 50 0001 C CNN
F 3 "~" H 3050 6750 50 0001 C CNN
1 3050 6750
-1 0 0 1
$EndComp
Wire Wire Line
3200 6750 3350 6750
$Comp
L Device:R R?
U 1 1 606E9AF9
P 2750 6750
F 0 "R?" V 2543 6750 50 0000 C CNN
F 1 "470" V 2634 6750 50 0000 C CNN
F 2 "" V 2680 6750 50 0001 C CNN
F 3 "~" H 2750 6750 50 0001 C CNN
1 2750 6750
0 1 1 0
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 606EA531
P 2500 6750
F 0 "#PWR?" H 2500 6600 50 0001 C CNN
F 1 "VCC" H 2517 6923 50 0000 C CNN
F 2 "" H 2500 6750 50 0001 C CNN
F 3 "" H 2500 6750 50 0001 C CNN
1 2500 6750
1 0 0 -1
$EndComp
Wire Wire Line
2500 6750 2600 6750
$Comp
L Connector:Conn_01x01_Male J?
U 1 1 60701566
P 3350 6350
F 0 "J?" V 3412 6394 50 0000 L CNN
F 1 "panel_led_halt" V 3503 6394 50 0000 L CNN
F 2 "" H 3350 6350 50 0001 C CNN
F 3 "~" H 3350 6350 50 0001 C CNN
1 3350 6350
0 1 1 0
$EndComp
Wire Wire Line
3350 6550 3350 6750
Connection ~ 3350 6750
Wire Wire Line
3350 6750 4200 6750
NoConn ~ 4200 6550
NoConn ~ 4200 6450
NoConn ~ 4200 7350
NoConn ~ 4200 7850
Wire Bus Line
6000 7050 6550 7050
Wire Bus Line
6550 7050 6550 6300
Wire Bus Line
6550 7850 6550 7050
Connection ~ 6550 7050
Connection ~ 7500 5700
Entry Wire Line
7200 3650 7100 3550
Entry Wire Line
7200 3550 7100 3450
Entry Wire Line
7200 3450 7100 3350
Entry Wire Line
7200 3350 7100 3250
Entry Wire Line
7200 3250 7100 3150
Entry Wire Line
7200 3150 7100 3050
Entry Wire Line
7200 3050 7100 2950
Entry Wire Line
7200 2950 7100 2850
Entry Wire Line
7200 2850 7100 2750
Entry Wire Line
7200 2750 7100 2650
Entry Wire Line
7200 2650 7100 2550
Entry Wire Line
7200 2550 7100 2450
Entry Wire Line
7200 2450 7100 2350
Entry Wire Line
7200 2350 7100 2250
Entry Wire Line
7200 2250 7100 2150
Wire Wire Line
7500 3750 7200 3750
Wire Wire Line
7500 3650 7200 3650
Wire Wire Line
7500 3550 7200 3550
Wire Wire Line
7500 3450 7200 3450
Wire Wire Line
7500 3350 7200 3350
Wire Wire Line
7500 2950 7200 2950
Wire Wire Line
7500 2850 7200 2850
Wire Wire Line
7500 2750 7200 2750
Wire Wire Line
7500 2650 7200 2650
Wire Wire Line
7500 2550 7200 2550
Wire Wire Line
7500 2450 7200 2450
Wire Wire Line
7500 2350 7200 2350
Text Label 7400 3750 2 50 ~ 0
A0
Text Label 7400 3650 2 50 ~ 0
A1
Text Label 7400 3550 2 50 ~ 0
A2
Text Label 7400 3450 2 50 ~ 0
A3
Text Label 7400 3350 2 50 ~ 0
A4
Text Label 7400 3250 2 50 ~ 0
A5
Text Label 7400 3150 2 50 ~ 0
A6
Text Label 7400 3050 2 50 ~ 0
A7
Text Label 7400 2950 2 50 ~ 0
A8
Text Label 7400 2850 2 50 ~ 0
A9
Text Label 7400 2750 2 50 ~ 0
A10
Text Label 7400 2650 2 50 ~ 0
A11
Text Label 7400 2550 2 50 ~ 0
A12
Text Label 7400 2450 2 50 ~ 0
A13
Text Label 7400 2350 2 50 ~ 0
A14
Text Label 7400 2250 2 50 ~ 0
A15
Entry Wire Line
7200 3750 7100 3650
Connection ~ 6550 6300
Wire Bus Line
7100 2150 6550 2150
Wire Bus Line
6550 6300 6550 2150
Text HLabel 4200 7450 0 50 Output ~ 0
IORQ
Text Notes 9300 2350 0 50 ~ 0
Memory decoding logic
Text HLabel 8850 1950 0 50 Input ~ 0
IORQ
$Comp
L 74xx:74HC04 U11
U 2 1 60689B1C
P 9150 2000
F 0 "U11" H 9150 2317 50 0000 C CNN
F 1 "74LS32" H 9150 2226 50 0000 C CNN
F 2 "" H 9150 2000 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 9150 2000 50 0001 C CNN
2 9150 2000
1 0 0 -1
$EndComp
Wire Wire Line
8850 1000 8850 1200
Wire Wire Line
7200 2250 8500 2250
$Comp
L 74xx:74HC04 U11
U 1 1 6054CE0E
P 9150 1000
F 0 "U11" H 9150 1317 50 0000 C CNN
F 1 "74HC04" H 9150 1226 50 0000 C CNN
F 2 "" H 9150 1000 50 0001 C CNN
F 3 "http://www.nxp.com/documents/data_sheet/74HC_HCT04.pdf" H 9150 1000 50 0001 C CNN
1 9150 1000
1 0 0 -1
$EndComp
Wire Wire Line
8500 2250 8500 1200
Wire Wire Line
8500 1200 8850 1200
Connection ~ 8850 1200
Wire Wire Line
8850 1200 8850 1400
$Comp
L 74xx:74LS32 U10
U 1 1 60716E05
P 10800 1900
F 0 "U10" H 10800 1583 50 0000 C CNN
F 1 "74LS32" H 10800 1674 50 0000 C CNN
F 2 "" H 10800 1900 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 10800 1900 50 0001 C CNN
1 10800 1900
1 0 0 1
$EndComp
Wire Wire Line
9450 1000 10250 1000
Wire Wire Line
10250 1000 10250 1800
Wire Wire Line
10250 1800 10500 1800
Wire Wire Line
9450 2000 9850 2000
$Comp
L 74xx:74LS32 U10
U 2 1 606614CA
P 9150 1500
F 0 "U10" H 9150 1183 50 0000 C CNN
F 1 "74LS32" H 9150 1274 50 0000 C CNN
F 2 "" H 9150 1500 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS32" H 9150 1500 50 0001 C CNN
2 9150 1500
1 0 0 1
$EndComp
Wire Wire Line
8850 1600 8850 1800
Wire Wire Line
8850 1800 9850 1800
Wire Wire Line
9850 1800 9850 2000
Connection ~ 9850 2000
Wire Wire Line
9850 2000 10500 2000
Text HLabel 11100 1900 2 50 Output ~ 0
RAMEN
Text HLabel 9450 1500 2 50 Output ~ 0
ROMEN
Text HLabel 9500 7850 3 50 Input ~ 0
RAMEN
Wire Wire Line
9500 7650 9500 7850
Text HLabel 9500 6300 3 50 Input ~ 0
ROMEN
Wire Wire Line
9500 6100 9500 6300
Text HLabel 4200 7150 0 50 Output ~ 0
RD
Text HLabel 4200 7250 0 50 Output ~ 0
WR
Text HLabel 9400 6300 3 50 Input ~ 0
RD
Text HLabel 9300 6300 3 50 Input ~ 0
WR
Wire Wire Line
9300 6300 9300 6100
Wire Wire Line
9400 6300 9400 6100
Text HLabel 9400 7850 3 50 Input ~ 0
RD
Text HLabel 9300 7850 3 50 Input ~ 0
WR
Wire Wire Line
9300 7850 9300 7650
Wire Wire Line
9400 7850 9400 7650
Text Notes 12650 3550 0 50 ~ 0
I/O Decoding logic
Text Notes 8500 8600 0 50 ~ 0
Memory
$Comp
L 74xx:74LS138 U?
U 1 1 60832D85
P 12450 2800
F 0 "U?" H 12450 3581 50 0000 C CNN
F 1 "74LS138" H 12450 3490 50 0000 C CNN
F 2 "" H 12450 2800 50 0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS138" H 12450 2800 50 0001 C CNN
1 12450 2800
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR?
U 1 1 608389FF
P 12450 3500
F 0 "#PWR?" H 12450 3250 50 0001 C CNN
F 1 "GND" H 12455 3327 50 0000 C CNN
F 2 "" H 12450 3500 50 0001 C CNN
F 3 "" H 12450 3500 50 0001 C CNN
1 12450 3500
1 0 0 -1
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 6084DC47
P 12450 1700
F 0 "#PWR?" H 12450 1550 50 0001 C CNN
F 1 "VCC" H 12467 1873 50 0000 C CNN
F 2 "" H 12450 1700 50 0001 C CNN
F 3 "" H 12450 1700 50 0001 C CNN
1 12450 1700
1 0 0 -1
$EndComp
$Comp
L Device:C C?
U 1 1 6084DC4D
P 12850 1700
F 0 "C?" V 12598 1700 50 0000 C CNN
F 1 "100nF" V 12689 1700 50 0000 C CNN
F 2 "" H 12888 1550 50 0001 C CNN
F 3 "~" H 12850 1700 50 0001 C CNN
1 12850 1700
0 1 1 0
$EndComp
$Comp
L Device:C C?
U 1 1 6084DC53
P 12850 1900
F 0 "C?" V 12598 1900 50 0000 C CNN
F 1 "56pF" V 12689 1900 50 0000 C CNN
F 2 "" H 12888 1750 50 0001 C CNN
F 3 "~" H 12850 1900 50 0001 C CNN
1 12850 1900
0 1 1 0
$EndComp
Wire Wire Line
13000 1700 13000 1800
$Comp
L power:GND #PWR?
U 1 1 6084DC5A
P 13100 1800
F 0 "#PWR?" H 13100 1550 50 0001 C CNN
F 1 "GND" H 13105 1627 50 0000 C CNN
F 2 "" H 13100 1800 50 0001 C CNN
F 3 "" H 13100 1800 50 0001 C CNN
1 13100 1800
1 0 0 -1
$EndComp
Wire Wire Line
13100 1800 13000 1800
Connection ~ 13000 1800
Wire Wire Line
13000 1800 13000 1900
Wire Wire Line
12450 1700 12450 1800
Wire Wire Line
12700 1900 12700 1800
Wire Wire Line
12700 1800 12450 1800
Connection ~ 12700 1800
Wire Wire Line
12700 1800 12700 1700
Connection ~ 12450 1800
Wire Wire Line
12450 1800 12450 2200
Text Notes 12600 2100 0 50 ~ 0
Smoothing caps
Wire Wire Line
11950 2500 8000 2500
Wire Wire Line
8000 2500 8000 3250
Wire Wire Line
7200 3250 8000 3250
Wire Wire Line
11950 2600 8150 2600
Wire Wire Line
8150 2600 8150 3150
Wire Wire Line
7200 3150 8150 3150
Wire Wire Line
11950 2700 8300 2700
Wire Wire Line
8300 2700 8300 3050
Wire Wire Line
7200 3050 8300 3050
Wire Wire Line
11950 3200 11950 3150
Text HLabel 11650 3150 0 50 Input ~ 0
IORQ
Wire Wire Line
11650 3150 11950 3150
Connection ~ 11950 3150
Wire Wire Line
11950 3150 11950 3100
$Comp
L power:VCC #PWR?
U 1 1 608D60DB
P 11650 3000
F 0 "#PWR?" H 11650 2850 50 0001 C CNN
F 1 "VCC" H 11667 3173 50 0000 C CNN
F 2 "" H 11650 3000 50 0001 C CNN
F 3 "" H 11650 3000 50 0001 C CNN
1 11650 3000
1 0 0 -1
$EndComp
Wire Wire Line
11650 3000 11950 3000
Wire Wire Line
12950 2500 14050 2500
Entry Wire Line
14050 2500 14150 2600
Wire Wire Line
12950 2600 14050 2600
Entry Wire Line
14050 2600 14150 2700
Wire Wire Line
12950 2700 14050 2700
Entry Wire Line
14050 2700 14150 2800
Wire Wire Line
12950 2800 14050 2800
Entry Wire Line
14050 2800 14150 2900
Wire Wire Line
12950 2900 14050 2900
Entry Wire Line
14050 2900 14150 3000
Wire Wire Line
12950 3000 14050 3000
Entry Wire Line
14050 3000 14150 3100
Wire Wire Line
12950 3100 14050 3100
Entry Wire Line
14050 3100 14150 3200
Wire Wire Line
12950 3200 14050 3200
Entry Wire Line
14050 3200 14150 3300
Text GLabel 14150 4650 3 50 BiDi ~ 0
IOBUS
Text Label 12950 2500 0 50 ~ 0
IOEN0
Text Label 12950 2600 0 50 ~ 0
IOEN1
Text Label 12950 2700 0 50 ~ 0
IOEN2
Text Label 12950 2800 0 50 ~ 0
IOEN3
Text Label 12950 2900 0 50 ~ 0
IOEN4
Text Label 12950 3000 0 50 ~ 0
IOEN5
Text Label 12950 3100 0 50 ~ 0
IOEN6
Text Label 12950 3200 0 50 ~ 0
IOEN7
Wire Bus Line
7800 5100 10350 5100
Wire Bus Line
7800 6650 10350 6650
Wire Bus Line
6000 7250 6000 8350
Wire Bus Line
14150 2600 14150 4650
Wire Bus Line
6000 5550 6000 7050
Wire Bus Line
6550 6300 9000 6300
Wire Bus Line
6550 7850 9000 7850
Wire Bus Line
7100 2150 7100 3650
$EndSCHEMATC
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