C64-250407-Replica
About the C64-250407-Replica PCB
C64-250407-Replica is an open source PCB design by bwack, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 390 × 179.8 mm, with 214 components from 87 distinct parts.
Other key parts include the CIA_U1, CIA_U2, 2364A, 2332A and 2114. By type, the board carries 92 capacitors, 33 resistors, 32 ICs, 25 inductors, 10 connectors and 5 transistors.
It belongs with the retro computing and wearables designs in this gallery.
From the project
A replica of the Commodore 64 250407 1983 mother board, and the schematics.
A replica of the Commodore 64 250407 1983 mother board, and the schematics.
The replica project was started by Michael K. (Der Alte Bastler) in 2019 to learn SprintLayout, and the process of reverse engineering PCB. I finished the layout in SprintLayout, and imported it to KiCad. The KU motherboard schematics is nowhere to be found on the internet. I used the 250407 Reb.B schematics as reference and modified it to match the KU motherboard layout.
Main components on the C64-250407-Replica
C64-250407-Replica bill of materials (BOM)
214 components, 87 distinct parts — part numbers from the project's BOM.
| 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 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 7408_U27 | DIP14 | U27 |
| 1 | 74LS74 | DIP14 | U29 |
| 1 | 74LS193 | DIP16 | U30 |
Show 67 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 | TP29B/2SD880 | TO-220-3_Horizontal_TabDown_250407 | 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_D7_250407 | 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_DASHED | JUMPER_WIRE | E2 |
| 1 | JUMPER_WIRE | JUMPER_WIRE | E3 |
| 1 | 1A | FUSE | F1 |
| 2 | 33R isolated | RP_ARRAY_7WAY | RP1, RP2 |
| 1 | R_ARRAY_7WAY_US 3K3 Bussed | RP_ARRAY_7WAY | RP3 |
| 1 | R_ARRAY_9WAY_US 3K3 Bussed | RP_ARRAY_9WAY | RP4 |
| 1 | POWER_SWITCH | POWER_SWITCH | SW1 |
| 1 | 7812 | VREG_TO-220-3_Horizontal_TabDown | VR1 |
| 1 | 7805 | VREG_TO-220-3_Horizontal_TabDown | VR2 |
| 22 | FERRITE_BEAD | FERRITE_BEAD_TH_P12.7mm | FB1, FB2, FB3, FB4, FB5, FB7, FB8, FB9 +14 |
| 1 | 2.2UH 2.2uH | RESISTOR | L2 |
| 1 | CHOKE | CHOKE | L4 |
| 1 | 1.2UH 1.2uH | INDUCTOR_P15.24mm | L5 |
| 54 | .1 | CAP_P5.08mm | C1, C2, C3, C4, C5, C6, C7, C9 +46 |
| 15 | 10UF 10uF | CAP_ELYT_RADIAL_P5.08mm_SMALL_RING | C8, C12, C13, C14, C15, C17, C24, C34 +7 |
| 2 | 470PF 470pF | CAP_P5.08mm | C10, C11 |
| 1 | 2200UF 2200uF | LARGE_ELECTROLYTIC_AXIAL_TH | C19 |
| 2 | .22 | CAP_POLY_100V_TH_P5.08_and_P12.07mm | C20, C21 |
| 1 | 360PF 360pF | CAP_AXIAL_P12.7mm | C23 |
| 1 | 20PF 20pF | RESISTOR | C36 |
| 1 | 1000PF 1000pF | CAP_P5.08mm | C37 |
| 1 | 51PF 51pF | CAP_AXIAL_P12.7mm | C38 |
| 2 | 1800PF 1800pF | CAP_P5.08mm | C48, C93 |
| 1 | 15pF 5% | RESISTOR | C70 |
| 2 | 82PF 82pF | RESISTOR | C83, C86 |
| 1 | .47 | CAP_P5.08mm | C85 |
| 1 | 1000UF 1000uF | LARGE_ELECTROLYTIC_AXIAL_TH | C88 |
| 1 | 470UF 470uF | LARGE_ELECTROLYTIC_AXIAL_TH | C90 |
| 1 | 100UF 100uF | CAP_ELYT_RADIAL_P5.08mm | C91 |
| 2 | .22 | CAP_P5.08mm | C97, C100 |
| 1 | 82pF | CAPACITOR_RADIAL_P13.97_L9.9_D3.6 | C203 |
| 1 | NC | CAP_P5.08mm | C204 |
| 1 | 220PF 220pF | CAP_P5.08mm | C205 |
| 4 | 3K3 | RESISTOR | R1, R43, R44, R45 |
| 2 | 1.5K | RESISTOR | R2, R51 |
| 2 | 10K | RESISTOR | R3, R7 |
| 10 | 1K | RESISTOR | R4, R6, R16, R28, R29, R30, R31, R36 +2 |
| 1 | 560 | RESISTOR | R5 |
| 2 | 2K7 | RESISTOR | R17, R37 |
| 1 | 15K | RESISTOR | R19 |
| 2 | 100 | RESISTOR | R26, R53 |
| 1 | 500 | POTMETER | R27 |
| 2 | 47K | RESISTOR | R33, R34 |
| 1 | 470K | RESISTOR | R35 |
| 1 | 390 | RESISTOR | R39 |
| 2 | 1M | RESISTOR | R41, R50 |
| 1 | 82 | RESISTOR | R42 |
| 1 | 330 | RESISTOR | R52 |
C64-250407-Replica design files
The KiCad project lives in the bwack/C64-250407-Replica-KiCad repository on GitHub; these links point at the commit this page was built from.
- Layout250407_.kicad_pcb
- Schematic250407_.kicad_sch
- BOM250407_bom.csv
C64-250407-Replica: common questions
How big is the C64-250407-Replica PCB?
The C64-250407-Replica measures 390 × 179.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the C64-250407-Replica?
214 components, from 87 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the C64-250407-Replica design files?
From the bwack/C64-250407-Replica-KiCad repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the C64-250407-Replica design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which bwack chose for the repository.
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