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A2000
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Amiga 2000 revision 6.2 motherboard re-done in KiCAD.
Schematics and PCB done, and working, see README for notes.
WARNING: stability issue with Wicher 500i, could be noise related from accelerator speed.
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A2000/processor.sch

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EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 13
Title "B2000 Processor"
Date "07/06/1987"
Rev "6.2-a"
Comp "Commodore"
Comment1 "Drawn by: Dave Haynie"
Comment2 "Used on: A2000-CR"
Comment3 "Next Assy: 312725"
Comment4 "Assy: 312721"
$EndDescr
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Text Label 5750 3450 0 50 ~ 0
A20
Text Label 5750 3550 0 50 ~ 0
A21
Text Label 5750 3650 0 50 ~ 0
A22
Text Label 5750 3750 0 50 ~ 0
A23
Text Label 5750 3950 0 50 ~ 0
D0
Text Label 5750 4050 0 50 ~ 0
D1
Text Label 5750 4150 0 50 ~ 0
D2
Text Label 5750 4250 0 50 ~ 0
D3
Text Label 5750 4350 0 50 ~ 0
D4
Text Label 5750 4450 0 50 ~ 0
D5
Text Label 5750 4550 0 50 ~ 0
D6
Text Label 5750 4650 0 50 ~ 0
D7
Text Label 5750 4750 0 50 ~ 0
D8
Text Label 5750 4850 0 50 ~ 0
D9
Text Label 5750 4950 0 50 ~ 0
D10
Text Label 5750 5050 0 50 ~ 0
D11
Text Label 5750 5150 0 50 ~ 0
D12
Text Label 5750 5250 0 50 ~ 0
D13
Text Label 5750 5350 0 50 ~ 0
D14
Text Label 5750 5450 0 50 ~ 0
D15
Wire Wire Line
6850 1350 7100 1350
Wire Wire Line
6850 1450 7100 1450
Wire Wire Line
6850 1550 7100 1550
Wire Wire Line
6850 1650 7100 1650
Wire Wire Line
6850 1750 7100 1750
Wire Wire Line
6850 1850 7100 1850
Wire Wire Line
6850 1950 7100 1950
Wire Wire Line
6850 2050 7100 2050
Text Label 6950 1350 0 50 ~ 0
D8
Text Label 6950 1450 0 50 ~ 0
D9
Text Label 6950 1550 0 50 ~ 0
D10
Text Label 6950 1650 0 50 ~ 0
D11
Text Label 6950 1750 0 50 ~ 0
D12
Text Label 6950 1850 0 50 ~ 0
D13
Text Label 6950 1950 0 50 ~ 0
D14
Text Label 6950 2050 0 50 ~ 0
D15
Wire Wire Line
6800 4450 7100 4450
Wire Wire Line
6800 4550 7100 4550
Wire Wire Line
6800 4650 7100 4650
Wire Wire Line
6800 4750 7100 4750
Wire Wire Line
6800 4850 7100 4850
Wire Wire Line
6800 4950 7100 4950
Wire Wire Line
6800 5050 7100 5050
Wire Wire Line
6800 5150 7100 5150
Text Label 6950 4450 0 50 ~ 0
D0
Text Label 6950 4550 0 50 ~ 0
D1
Text Label 6950 4650 0 50 ~ 0
D2
Text Label 6950 4750 0 50 ~ 0
D3
Text Label 6950 4850 0 50 ~ 0
D4
Text Label 6950 4950 0 50 ~ 0
D5
Text Label 6950 5050 0 50 ~ 0
D6
Text Label 6950 5150 0 50 ~ 0
D7
Entry Wire Line
6750 1450 6850 1350
Entry Wire Line
6750 1550 6850 1450
Entry Wire Line
6750 1650 6850 1550
Entry Wire Line
6750 1750 6850 1650
Entry Wire Line
6750 1850 6850 1750
Entry Wire Line
6750 1950 6850 1850
Entry Wire Line
6750 2050 6850 1950
Entry Wire Line
6750 2150 6850 2050
Entry Wire Line
6700 4550 6800 4450
Entry Wire Line
6700 4650 6800 4550
Entry Wire Line
6700 4750 6800 4650
Entry Wire Line
6700 4850 6800 4750
Entry Wire Line
6700 4950 6800 4850
Entry Wire Line
6700 5050 6800 4950
Entry Wire Line
6700 5150 6800 5050
Entry Wire Line
6700 5250 6800 5150
Wire Bus Line
6550 2150 6750 2150
Wire Bus Line
6550 5250 6700 5250
Text GLabel 6550 2150 0 50 Input ~ 0
D[0..15]
Text GLabel 6550 5250 0 50 Input ~ 0
D[0..15]
Text GLabel 9450 2350 0 50 Input ~ 0
_OEL
Text GLabel 9450 2250 0 50 Input ~ 0
_LATCH
Text GLabel 9450 5350 0 50 Input ~ 0
_LATCH
Text GLabel 9450 5450 0 50 Input ~ 0
_OEL
Wire Wire Line
9450 5450 9600 5450
Wire Wire Line
9450 5350 9600 5350
Wire Wire Line
9450 2250 9600 2250
Wire Wire Line
9600 2350 9450 2350
Wire Wire Line
8100 1350 8300 1350
Wire Wire Line
8100 1450 8300 1450
Wire Wire Line
8100 1550 8300 1550
Wire Wire Line
8100 1650 8300 1650
Wire Wire Line
8100 1750 8300 1750
Wire Wire Line
8100 1850 8300 1850
Wire Wire Line
8100 1950 8300 1950
Wire Wire Line
8100 2050 8300 2050
Entry Wire Line
8300 1350 8400 1250
Entry Wire Line
8300 1450 8400 1350
Entry Wire Line
8300 1550 8400 1450
Entry Wire Line
8300 1650 8400 1550
Entry Wire Line
8300 1750 8400 1650
Entry Wire Line
8300 1850 8400 1750
Entry Wire Line
8300 1950 8400 1850
Entry Wire Line
8300 2050 8400 1950
Text GLabel 8550 1150 2 50 Input ~ 0
DRD[0..15]
Text Label 8100 1350 0 50 ~ 0
DRD8
Text Label 8100 1450 0 50 ~ 0
DRD9
Text Label 8100 1550 0 50 ~ 0
DRD10
Text Label 8100 1650 0 50 ~ 0
DRD11
Text Label 8100 1750 0 50 ~ 0
DRD12
Text Label 8100 1850 0 50 ~ 0
DRD13
Text Label 8100 1950 0 50 ~ 0
DRD14
Text Label 8100 2050 0 50 ~ 0
DRD15
Wire Wire Line
8450 4450 8100 4450
Wire Wire Line
8450 4550 8100 4550
Wire Wire Line
8450 4650 8100 4650
Wire Wire Line
8450 4750 8100 4750
Wire Wire Line
8450 4850 8100 4850
Wire Wire Line
8450 4950 8100 4950
Wire Wire Line
8450 5050 8100 5050
Wire Wire Line
8450 5150 8100 5150
Entry Wire Line
8450 4450 8550 4350
Entry Wire Line
8450 4550 8550 4450
Entry Wire Line
8450 4650 8550 4550
Entry Wire Line
8450 4750 8550 4650
Entry Wire Line
8450 4850 8550 4750
Entry Wire Line
8450 4950 8550 4850
Entry Wire Line
8450 5050 8550 4950
Entry Wire Line
8450 5150 8550 5050
Text GLabel 8800 4150 2 50 Input ~ 0
DRD[0..15]
Text Label 8150 4450 0 50 ~ 0
DRD0
Text Label 8150 4550 0 50 ~ 0
DRD1
Text Label 8150 4650 0 50 ~ 0
DRD2
Text Label 8150 4750 0 50 ~ 0
DRD3
Text Label 8150 4850 0 50 ~ 0
DRD4
Text Label 8150 4950 0 50 ~ 0
DRD5
Text Label 8150 5050 0 50 ~ 0
DRD6
Text Label 8150 5150 0 50 ~ 0
DRD7
Wire Wire Line
7000 5450 7100 5450
Wire Wire Line
9600 1350 9250 1350
Wire Wire Line
9600 1450 9250 1450
Wire Wire Line
9600 1550 9250 1550
Wire Wire Line
9600 1650 9250 1650
Wire Wire Line
9600 1750 9250 1750
Wire Wire Line
9600 1850 9250 1850
Wire Wire Line
9600 1950 9250 1950
Wire Wire Line
9600 2050 9250 2050
Wire Wire Line
10600 1350 10950 1350
Wire Wire Line
10600 1450 10950 1450
Wire Wire Line
10600 1550 10950 1550
Wire Wire Line
10600 1650 10950 1650
Wire Wire Line
10600 1750 10950 1750
Wire Wire Line
10600 1850 10950 1850
Wire Wire Line
10600 1950 10950 1950
Wire Wire Line
10600 2050 10950 2050
Wire Wire Line
10600 4450 11000 4450
Wire Wire Line
10600 4550 11000 4550
Wire Wire Line
10600 4650 11000 4650
Wire Wire Line
10600 4750 11000 4750
Wire Wire Line
10600 4850 11000 4850
Wire Wire Line
10600 4950 11000 4950
Wire Wire Line
10600 5050 11000 5050
Wire Wire Line
10600 5150 11000 5150
Wire Wire Line
9150 4450 9600 4450
Wire Wire Line
9150 4550 9600 4550
Wire Wire Line
9150 4650 9600 4650
Wire Wire Line
9150 4750 9600 4750
Wire Wire Line
9150 4850 9600 4850
Wire Wire Line
9150 4950 9600 4950
Wire Wire Line
9150 5050 9600 5050
Wire Wire Line
9150 5150 9600 5150
Entry Wire Line
9150 1450 9250 1350
Entry Wire Line
9150 1550 9250 1450
Entry Wire Line
9150 1650 9250 1550
Entry Wire Line
9150 1750 9250 1650
Entry Wire Line
9150 1850 9250 1750
Entry Wire Line
9150 1950 9250 1850
Entry Wire Line
9150 2050 9250 1950
Entry Wire Line
9150 2150 9250 2050
Entry Wire Line
9050 4550 9150 4450
Entry Wire Line
9050 4650 9150 4550
Entry Wire Line
9050 4750 9150 4650
Entry Wire Line
9050 4850 9150 4750
Entry Wire Line
9050 4950 9150 4850
Entry Wire Line
9050 5050 9150 4950
Entry Wire Line
9050 5150 9150 5050
Entry Wire Line
9050 5250 9150 5150
Entry Wire Line
11000 4450 11100 4350
Entry Wire Line
11000 4550 11100 4450
Entry Wire Line
11000 4650 11100 4550
Entry Wire Line
11000 4750 11100 4650
Entry Wire Line
11000 4850 11100 4750
Entry Wire Line
11000 4950 11100 4850
Entry Wire Line
11000 5050 11100 4950
Entry Wire Line
11000 5150 11100 5050
Entry Wire Line
10950 1350 11050 1250
Entry Wire Line
10950 1450 11050 1350
Entry Wire Line
10950 1550 11050 1450
Entry Wire Line
10950 1650 11050 1550
Entry Wire Line
10950 1750 11050 1650
Entry Wire Line
10950 1850 11050 1750
Entry Wire Line
10950 1950 11050 1850
Entry Wire Line
10950 2050 11050 1950
Wire Bus Line
11050 1100 11000 1100
Wire Bus Line
10950 4200 11100 4200
Text Label 9350 1450 0 50 ~ 0
DRD9
Text Label 9350 1550 0 50 ~ 0
DRD10
Text Label 9350 1650 0 50 ~ 0
DRD11
Text Label 9350 1750 0 50 ~ 0
DRD12
Text Label 9350 1850 0 50 ~ 0
DRD13
Text Label 9350 1950 0 50 ~ 0
DRD14
Text Label 9350 2050 0 50 ~ 0
DRD15
Text Label 9350 4450 0 50 ~ 0
DRD0
Text Label 9350 4550 0 50 ~ 0
DRD1
Text Label 9350 4650 0 50 ~ 0
DRD2
Text Label 9350 4750 0 50 ~ 0
DRD3
Text Label 9350 4850 0 50 ~ 0
DRD4
Text Label 9350 4950 0 50 ~ 0
DRD5
Text Label 9350 5050 0 50 ~ 0
DRD6
Text Label 9350 5150 0 50 ~ 0
DRD7
Wire Bus Line
8400 1150 8550 1150
Wire Bus Line
8550 5250 9050 5250
Wire Bus Line
8550 4150 8800 4150
Text GLabel 11000 1100 0 50 Input ~ 0
D[0..15]
Text GLabel 10950 4200 0 50 Input ~ 0
D[0..15]
Text Label 10650 1350 0 50 ~ 0
D8
Text Label 10650 1450 0 50 ~ 0
D9
Text Label 10650 1550 0 50 ~ 0
D10
Text Label 10650 1650 0 50 ~ 0
D11
Text Label 10650 1750 0 50 ~ 0
D12
Text Label 10650 1850 0 50 ~ 0
D13
Text Label 10650 1950 0 50 ~ 0
D14
Text Label 10650 2050 0 50 ~ 0
D15
Text Label 10650 4450 0 50 ~ 0
D0
Text Label 10650 4550 0 50 ~ 0
D1
Text Label 10650 4650 0 50 ~ 0
D2
Text Label 10650 4750 0 50 ~ 0
D3
Text Label 10650 4850 0 50 ~ 0
D4
Text Label 10650 4950 0 50 ~ 0
D5
Text Label 10650 5050 0 50 ~ 0
D6
Text Label 10650 5150 0 50 ~ 0
D7
$Comp
L power:GND #PWR014
U 1 1 5D2C2784
P 7600 5750
F 0 "#PWR014" H 7600 5500 50 0001 C CNN
F 1 "GND" H 7605 5577 50 0000 C CNN
F 2 "" H 7600 5750 50 0001 C CNN
F 3 "" H 7600 5750 50 0001 C CNN
1 7600 5750
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR018
U 1 1 5D2C2A9A
P 10100 5750
F 0 "#PWR018" H 10100 5500 50 0001 C CNN
F 1 "GND" H 10105 5577 50 0000 C CNN
F 2 "" H 10100 5750 50 0001 C CNN
F 3 "" H 10100 5750 50 0001 C CNN
1 10100 5750
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR016
U 1 1 5D2C2EA7
P 10100 2650
F 0 "#PWR016" H 10100 2400 50 0001 C CNN
F 1 "GND" H 10105 2477 50 0000 C CNN
F 2 "" H 10100 2650 50 0001 C CNN
F 3 "" H 10100 2650 50 0001 C CNN
1 10100 2650
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR012
U 1 1 5D2C3607
P 7600 2650
F 0 "#PWR012" H 7600 2400 50 0001 C CNN
F 1 "GND" H 7605 2477 50 0000 C CNN
F 2 "" H 7600 2650 50 0001 C CNN
F 3 "" H 7600 2650 50 0001 C CNN
1 7600 2650
1 0 0 -1
$EndComp
$Comp
L Device:R R917
U 1 1 5DE25665
P 3250 4050
F 0 "R917" H 3320 4096 50 0000 L CNN
F 1 "330" H 3320 4005 50 0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3180 4050 50 0001 C CNN
F 3 "~" H 3250 4050 50 0001 C CNN
F 4 "603-CFR-25JT-52-330R" H 3250 4050 50 0001 C CNN "RefOrder"
1 3250 4050
1 0 0 -1
$EndComp
$Comp
L power:+5V #PWR031
U 1 1 5DE25EBF
P 3250 3800
F 0 "#PWR031" H 3250 3650 50 0001 C CNN
F 1 "+5V" H 3265 3973 50 0000 C CNN
F 2 "" H 3250 3800 50 0001 C CNN
F 3 "" H 3250 3800 50 0001 C CNN
1 3250 3800
1 0 0 -1
$EndComp
Wire Wire Line
3250 3800 3250 3900
Wire Wire Line
3250 4200 3250 4550
Connection ~ 3250 4550
Wire Wire Line
3250 4550 3750 4550
Text GLabel 1550 3250 0 50 Input ~ 0
_VMA
Wire Wire Line
1550 3250 3050 3250
Connection ~ 3050 3250
Text GLabel 1550 3450 0 50 Input ~ 0
_VPA
Wire Wire Line
1550 3450 3150 3450
Connection ~ 3150 3450
Wire Bus Line
8400 2150 9150 2150
Text Label 9350 1350 0 50 ~ 0
DRD8
$Comp
L Device:R R1000
U 1 1 5DEC05BA
P 3500 3750
F 0 "R1000" H 3570 3796 50 0000 L CNN
F 1 "330" H 3570 3705 50 0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3430 3750 50 0001 C CNN
F 3 "~" H 3500 3750 50 0001 C CNN
F 4 "603-CFR-25JT-52-330R" H 3500 3750 50 0001 C CNN "RefOrder"
1 3500 3750
1 0 0 -1
$EndComp
$Comp
L power:+5V #PWR032
U 1 1 5DEC0AA7
P 3500 4100
F 0 "#PWR032" H 3500 3950 50 0001 C CNN
F 1 "+5V" H 3515 4273 50 0000 C CNN
F 2 "" H 3500 4100 50 0001 C CNN
F 3 "" H 3500 4100 50 0001 C CNN
1 3500 4100
-1 0 0 1
$EndComp
Wire Wire Line
3500 3900 3500 4100
Wire Wire Line
3500 3600 3500 3450
Connection ~ 3500 3450
Wire Wire Line
3500 3450 3150 3450
Connection ~ 3750 4350
Wire Bus Line
6050 1350 6150 1350
$Comp
L CPU_NXP_68000:68000D U100
U 1 1 5CEABE4E
P 4750 3750
F 0 "U100" H 4750 4000 50 0000 C CNN
F 1 "MC68000" H 4750 4150 50 0000 C CNN
F 2 "Package_DIP:DIP-64_W22.86mm_Socket" H 4750 3750 50 0001 C CNN
F 3 "https://www.nxp.com/docs/en/reference-manual/MC68000UM.pdf" H 4750 3750 50 0001 C CNN
1 4750 3750
1 0 0 -1
$EndComp
$Comp
L Device:R R1
U 1 1 5D139FBE
P 850 3950
F 0 "R1" H 920 3996 50 0000 L CNN
F 1 "68" H 920 3905 50 0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 780 3950 50 0001 C CNN
F 3 "~" H 850 3950 50 0001 C CNN
F 4 "603-CFR-25JT-52-68R" H 850 3950 50 0001 C CNN "RefOrder"
1 850 3950
1 0 0 -1
$EndComp
$Comp
L Device:C C1
U 1 1 5D13AB75
P 850 3650
F 0 "C1" H 965 3696 50 0000 L CNN
F 1 "270pF" H 965 3605 50 0000 L CNN
F 2 "Capacitor_THT:C_Rect_L11.5mm_W2.6mm_P10.00mm_MKT" H 888 3500 50 0001 C CNN
F 3 "~" H 850 3650 50 0001 C CNN
F 4 "581-SA101A271KAA" H 850 3650 50 0001 C CNN "RefOrder"
1 850 3650
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR0262
U 1 1 5D13B4A3
P 850 4100
F 0 "#PWR0262" H 850 3850 50 0001 C CNN
F 1 "GND" H 855 3927 50 0000 C CNN
F 2 "" H 850 4100 50 0001 C CNN
F 3 "" H 850 4100 50 0001 C CNN
1 850 4100
1 0 0 -1
$EndComp
Wire Wire Line
850 3350 850 3500
Connection ~ 850 3350
Wire Wire Line
850 3350 3750 3350
Wire Notes Line
600 3450 1250 3450
Wire Notes Line
1250 3450 1250 4400
Wire Notes Line
1250 4400 600 4400
Text Notes 700 4150 1 50 ~ 0
rev 6.2 fixes
Wire Bus Line
6050 3850 6150 3850
Text Label 3500 1850 0 50 ~ 0
_IPL0
Text Label 3500 1950 0 50 ~ 0
_IPL1
Text Label 3500 2050 0 50 ~ 0
_IPL2
Text Label 3550 2750 0 50 ~ 0
FC0
Text Label 3550 2850 0 50 ~ 0
FC1
Text Label 3550 2950 0 50 ~ 0
FC2
Wire Bus Line
1850 1950 1850 2200
Wire Bus Line
1850 2850 1850 3150
Wire Bus Line
6750 1450 6750 2150
Wire Bus Line
6700 4550 6700 5250
Wire Bus Line
9150 1450 9150 2150
Wire Bus Line
9050 4550 9050 5250
Wire Bus Line
11050 1100 11050 1950
Wire Bus Line
11100 4200 11100 5050
Wire Bus Line
8550 4150 8550 5250
Wire Bus Line
8400 1150 8400 2150
Wire Bus Line
6050 3850 6050 5350
Wire Bus Line
6050 1350 6050 3650
$EndSCHEMATC