RC1 CPU
About the RC1 CPU PCB
RC1 CPU is an open source PCB design by tebl, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 99.1 × 99.1 mm, with 45 components from 26 distinct parts.
Other key parts include the 6502, HM62256BLP-7, 28C256, 6532 and 74LS00. By type, the board carries 11 capacitors, 10 resistors, 9 ICs, 6 jumpers, 4 modules and 4 connectors.
It belongs with the retro computing and displays & leds designs in this gallery.
From the project
A recreation of the MOS KIM-1 microcomputer, the start of the Commodore-line of computers. Complete with hex keypad, six digit displays and a lot of 8-bit fun!
Among the years I've built quite a few computers, some bought as kits from various vendors and some I even designed myself based on available designs describes in books and other technical resources - above all, there was one I really wanted above all of them; the KIM-1! The RC-ONE is a functional replica designed in a modular fashion, for the specifics see the specific module.
Main components on the RC1 CPU
RC1 CPU bill of materials (BOM)
45 components, 26 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 6502 | DIP-40_W15.24mm_Socket | U1 |
| 1 | HM62256BLP-7 | DIP-28_W15.24mm_Socket | U2 |
| 1 | 28C256 | DIP-28_W15.24mm_Socket | U3 |
| 1 | 6532 | DIP-40_W15.24mm_Socket | U4 |
| 2 | 74LS00 | DIP-14_W7.62mm_Socket | U5, U9 |
| 1 | LM556 | DIP-14_W7.62mm_Socket | U6 |
| 2 | 74LS138 | DIP-16_W7.62mm_Socket | U7, U8 |
| 4 | Mounting | 1pin | M1, M2, M3, M4 |
| 1 | 1MHz | Oscillator_DIP-14 | X1 |
| 1 | Expansion | Pin_Header_Angled_1x39_Pitch2.54mm | J1 |
| 1 | RC1_UI_Port | Pin_Header_Straight_2x20_Pitch2.54mm | J2 |
| 1 | BARREL_JACK | BARREL_JACK | J3 |
| 1 | K1-4 | Pin_Header_Straight_1x04_Pitch2.54mm | J4 |
| 1 | VP_GND | Pin_Header_Straight_1x02_Pitch2.54mm | JP1 |
| 1 | DEN | Pin_Header_Straight_1x02_Pitch2.54mm | JP2 |
| 1 | RAM_CS | Pin_Header_Straight_1x03_Pitch2.54mm | JP3 |
| 1 | ROM_CS | Pin_Header_Straight_1x03_Pitch2.54mm | JP4 |
| 1 | A13 | Pin_Header_Straight_1x03_Pitch2.54mm | JP7 |
| 1 | A14 | Pin_Header_Straight_1x03_Pitch2.54mm | JP8 |
| 9 | 100nF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +1 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 220nF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C10, C11 |
| 4 | 3k3 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R6, R7 |
| 1 | 3.3k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 2 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9, R10 |
| 2 | 47k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R11, R12 |
| 1 | 4k7x8 | R_Array_SIP9 | RN1 |
RC1 CPU design files
The KiCad project lives in the tebl/RC-ONE repository on GitHub; these links point at the commit this page was built from.
RC1 CPU: common questions
How big is the RC1 CPU PCB?
The RC1 CPU measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RC1 CPU?
45 components, from 26 distinct parts. The full bill of materials is listed on this page.
Where can I download the RC1 CPU design files?
From the tebl/RC-ONE repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the RC1 CPU design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which tebl chose for the repository.
More boards in RC-ONE
RC1 UI
99.1 × 97.2 mm89 parts2LCERN-OHL-1.225
AVR/ArduinoRC1 8K ExRAM
99.1 × 83.8 mm36 parts2LCERN-OHL-1.225
RC1 Sound Interface
99.1 × 68 mm35 parts2LCERN-OHL-1.225
RC1 TMS9918A
99.1 × 76.8 mm32 parts2LCERN-OHL-1.225
RC1 Keypad
66 × 76.2 mm30 parts2LCERN-OHL-1.225
RC1 Real Time Clock
99.1 × 59.7 mm28 parts2LCERN-OHL-1.225
RC1 Keypad MX
72.4 × 122.6 mm26 parts2LCERN-OHL-1.225
RC1 65K Expansion
99.1 × 55.2 mm23 parts2LCERN-OHL-1.225
RC1 ACIA
99.1 × 58.4 mm20 parts2LCERN-OHL-1.225
RC1 Compact Flash
99.1 × 54.6 mm20 parts2LCERN-OHL-1.225
AVR/ArduinoRC1 Keypad to USB
72.4 × 45.1 mm8 parts2LCERN-OHL-1.225
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