4 layers23.4 × 24 mm
4 layers190.6 × 74.9 mm
Backplane
NevynUK/ManchesterBaby4Manchester Baby (Small Scale Experimental Machine)
- Size
- 190.6 × 74.9 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 97
- Pads
- 921
- Tracks, vias
- 2,316, 0
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 11 Feb 2017
- Updated
- 8 Oct 2026
Overview
Backplane is an open-source printed circuit board by NevynUK, from the NevynUK/ManchesterBaby repository on GitHub, published under the MIT licence. It is a 4-layer board of 190.6 × 74.9 mm with 19 parts on 97 nets, routed with 2,316 tracks and 0 vias.
README
README.mdManchesterBaby
Manchester Baby (Small Scale Experimental Machine)
The Manchester Small Scale Experimental Machine was the worlds first computer capable of executing a stored program. The 32-bit architecture utilised an instruction set using only 3 bits allowing 8 possible instructions. The program was stored in 32 memory locations (or store lines) with both data and program sharing storage (von Neumann architecture).
Emulator
The Emulator implements a simplified version of the Manchester Baby. The main program is able to read simple assembler files and execute the programs contained. The program displays the status of the machine at the start and end of the program run.
Source files for the emulator are available for the following platforms:
- C++ Desktop
- C++ Running on NuttX RTOS (Coming Soon)
- Python Desktop
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | PCIE-098-02-X-D-TH | SAM9745-ND (PCIe 98 Positions):SAMTEC_PCIE-098-02-X-D-TH | J1, J2, J3, J5, J6, J7, J8, J9, J10 |
| 8 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 1 | Conn_01x03 | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | Power |
| 1 | Conn_01x10 | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | GND |
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Questions
How big is the Backplane PCB?
It measures 190.6 × 74.9 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Backplane use?
19 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Backplane KiCad files?
From the NevynUK/ManchesterBaby repository on GitHub, at the commit this page was made from: the board is Hardware/Backplane/Backplane.kicad_pcb and its schematic Hardware/Backplane/Backplane.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Backplane design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).