C64 Motherboard KU-14194HB

baldengineer·bit-preserve·Commodore/C64/KU-14194HB-RevB-KiCad/KU-14194HB-REV-B-KiCad.kicad_pcb

C64 Motherboard KU-14194HB PCB layout, top view — open source board by baldengineer

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About the C64 Motherboard KU-14194HB PCB

C64 Motherboard KU-14194HB is an open source PCB design by baldengineer, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 390.2 × 180.3 mm, with 220 components from 91 distinct parts.

Other key parts include the CIA_U1, CIA_U2, 2364A, 2332A and 2114. By type, the board carries 96 capacitors, 34 resistors, 32 ICs, 26 inductors, 10 connectors and 5 transistors.

It belongs with the retro computing designs in this gallery.

From the project

Project for capturing vintage, classic, aka old computer schematics in KiCad.

The KU14194HB C64 Motherboard schematics and layout. Retraced in and imported from SprintLayout. This less common board was an interim board produced in 1982, and wasproduced between the 326298 (1982) and 250407 (1983).

This KiCad design is a replica. It includes the mistakes that Commodore made. It is necessary to cut a trace above R37 on the bottom side, and add a 1K resistor from R37 and up to a via. See the images folder to where to cut and add a resistor. Piggyback a 100nF capacitor over CR1. Notice how the main crystal oscillator Y1 body is grounded with a wire.

C64 Motherboard KU-14194HB, from the project README — From the project README

Main components on the C64 Motherboard KU-14194HB

CIA_U1 CIA_U2 2364A 2332A 2114 6510_MPU 7406N 4164-2 74LS257 74LS258 74LS139 4066_U28 PLA_U17 6581 VIC 556 74LS373 7408_U27 74LS74 74LS193 74LS629N MC4044

C64 Motherboard KU-14194HB bill of materials (BOM)

220 components, 91 distinct parts.

Qty	Part	Footprint	Refs
1	CIA_U1	DIP40	U1
1	CIA_U2	DIP40	U2
2	2364A	DIP24	U3, U4
1	2332A	DIP24	U5
1	2114	DIP18	U6
1	6510_MPU	DIP40	U7
1	7406N	DIP14	U8
8	4164-2	DIP16	U9, U10, U11, U12, U21, U22, U23, U24
2	74LS257	DIP16	U13, U25
1	74LS258	DIP16	U14
1	74LS139	DIP16	U15
2	4066_U28	DIP14	U16, U28
1	PLA_U17	DIP28	U17
1	6581	DIP28	U18
1	VIC	DIP40	U19
1	556	DIP14	U20
1	74LS373	DIP20	U26
1	7408_U27	DIP14	U27
1	74LS74	DIP14	U29
1	74LS193	DIP16	U30

Show 71 more

Qty	Part	Footprint	Refs
1	74LS629N	DIP16	U31
1	MC4044	DIP14	U32
1	MODULATOR_LONGBOARD	MODULATOR_PORT_LONGBOARD	M1
4	2SC1815	Q_NPN_ECB	Q1, Q2, Q7, Q8
1	TP298/2SD880	TO-220-3_Vertical	Q3
1	Crystal	CRYSTAL	Y1
1	KEYBOARD_20PIN_MALE	KEYBOARD_CON	CN1
1	USER_PORT_CON	EDGE_CON_24P	CN2
1	CASSETTE_PORT_CON	EDGE_CON_12P_TAPE	CN3
1	SERIAL_BUS_CON	SERIAL_CON_DIN6	CN4
1	AV_CONN	AV_CON_DIN8	CN5
1	EXPANSION_PORT	EXPANSION_PORT	CN6
1	POWER_CON	POWER_CON_DIN7	CN7
2	CONTROL_PORT	JOYPORT_DB9	CN8, CN9
1	LED_CONNECTOR	LED_CON	CN10
1	IN4371	ZENER_12.7mm	CR1
1	IN755	ZENER_12.7mm	CR2
1	BRIDGE_RECTIFIER	BRIDGE_RECTIFIER	CR4
2	1N4001	RECTIFIER_TH_P12.7mm	CR5, CR6
1	JUMPER_WIRE	JUMPER_WIRE	E1
1	1A	FUSE	F1
2	33	RP_ARRAY_7WAY	RP1, RP2
1	R_ARRAY_7WAY_US	RP_ARRAY_7WAY	RP3
1	R_ARRAY_9WAY_US	RP_ARRAY_9WAY	RP4
1	POWER_SWITCH	POWER_SWITCH	SW1
1	7812	VOTLAGE_REGULATOR_TO220	VR1
1	7805	VOTLAGE_REGULATOR_TO220	VR2
1	NOT USED	DIP4_DIP14_but_4_pins	XT1
13	FERRITE_NARROW	FERRITE_BEAD_TH_P12.7mm	FB1, FB2, FB3, FB5, FB7, FB8, FB9, FB16 +5
9	FERRITE_BEAD	FERRITE_BEAD_TH_P12.7mm	FB4, FB10, FB11, FB12, FB13, FB14, FB15, FB18 +1
2	2.2uH	RESISTOR	L1, L2
1	CHOKE	CHOKE	L4
1	1.2uH	INDUCTOR_P15.24mm	L5
53	.1	CAP_P5.08mm	C1, C2, C3, C4, C5, C6, C7, C9 +45
14	10uF	CAP_ELYT_RADIAL_P2.54mm	C8, C12, C13, C14, C15, C17, C24, C34 +6
2	470pF	CAP_AXIAL_P10.16mm	C10, C11
1	2200uF	LARGE_ELECTROLYTIC_33x18_P38.10mm_AXIAL_TH	C19
2	.22	CAP_POLY_100V_TH_P10.16mm	C20, C21
1	360pF	CAP_AXIAL_P12.7mm	C23
4	NC	CAP_P5.08mm	C35, C37, C55, C87
1	20pF	RESISTOR	C36
1	51pF	CAP_AXIAL_P12.7mm	C38
2	1800pF	RESISTOR_10.16mm	C48, C93
2	.1	CAP_P12mm	C49, C52
1	~	RESISTOR	C70
2	NC	CAP_AXIAL_P12.7mm	C73, C80
2	82pF	RESISTOR	C83, C86
1	.47	CAP_P5.08mm	C85
1	1000uF	LARGE_ELECTROLYTIC_33x18_P38.10mm_AXIAL_TH	C88
1	470uF	LARGE_ELECTROLYTIC_33x18_P38.10mm_AXIAL_TH	C90
1	100uF	CAP_ELYT_RADIAL_P5.08mm	C91
2	.22	CAP_P5.08mm	C97, C100
2	10	CAP_ELYT_RADIAL_P2.54mm	C107, C108
4	3K3	RESISTOR	R1, R43, R44, R45
2	1.5K	RESISTOR	R2, R51
2	10K	RESISTOR	R3, R7
8	1K	RESISTOR	R4, R6, R16, R28, R29, R30, R36, R38
1	560	RESISTOR	R5
1	2K7	RESISTOR	R17
1	15K	RESISTOR	R19
2	NC	RESISTOR	R22, R23
1	100	RESISTOR	R26
1	500	POTMETER	R27
1	180	RESISTOR	R31
2	47K	RESISTOR	R33, R34
1	470K	RESISTOR	R35
1	2.7K	RESISTOR	R37
1	390	RESISTOR	R39
2	1M	RESISTOR	R41, R50
1	~	RESISTOR	R42
2	?	RESISTOR	R52, R53

C64 Motherboard KU-14194HB design files

The KiCad project lives in the baldengineer/bit-preserve repository on GitHub; these links point at the commit this page was built from.

LayoutCommodore/C64/KU-14194HB-RevB-KiCad/KU-14194HB-REV-B-KiCad.kicad_pcb

C64 Motherboard KU-14194HB: common questions

How big is the C64 Motherboard KU-14194HB PCB?

The C64 Motherboard KU-14194HB measures 390.2 × 180.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the C64 Motherboard KU-14194HB?

220 components, from 91 distinct parts. The full bill of materials is listed on this page.

Where can I download the C64 Motherboard KU-14194HB design files?

From the baldengineer/bit-preserve repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the C64 Motherboard KU-14194HB design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which baldengineer chose for the repository.

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