HardLabs

Backplane

atarola·compy6502·kicad/backplane/backplane.kicad_pcb

Backplane PCB layout, top view — open source board by atarola

About the Backplane PCB

Backplane is an open source PCB design by atarola, published on GitHub. It is a 2-layer board measuring 190.5 × 105 mm, with 49 components from 7 distinct parts.

By type, the board carries 16 diodes, 16 resistors, 8 connectors, 8 capacitors and 1 switch.

It belongs with the retro computing designs in this gallery.

From the project

Code for my 6502 build

compy6502 is an early-stage 6502 homebrew computer project. The long-term goal is to build enough hardware and firmware to run Tetris on the machine.

The design follows the spirit of Ben Eater-style breadboard/modular 6502 systems for simplicity and debuggability, but uses a different memory map based on the MMU/address-decoder architecture in docs/mmu.png.

The repo currently includes KiCad hardware designs, early ROM bring-up firmware, build/write scripts, emulator test scaffolding, and architecture reference images in docs/.

Backplane bill of materials (BOM)

49 components, 7 distinct parts.

QtyPartRefs
7
Board Connector
J1, J2, J3, J4, J5, J6, J7
1
Screw_Terminal_01x02
J9
1
SW_SPDT
SW1
16
~
D1, D2, D3, D4, D5, D6, D7, D8 +8
1
100u
C1
7
0.1u
C2, C3, C4, C5, C6, C7, C8
16
10k
R1, R2, R3, R4, R5, R6, R7, R8 +8

Backplane design files

The KiCad project lives in the atarola/compy6502 repository on GitHub; these links point at the commit this page was built from.

Backplane: common questions

How big is the Backplane PCB?

The Backplane measures 190.5 × 105 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Backplane?

49 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Backplane design files?

From the atarola/compy6502 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Backplane design in my own project?

The repository has no license, so all rights stay with atarola. Use it as a reference, and ask the author before reusing the design.

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