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NEC PC Engine

tebl·C64-JoyKEY·adapters/NEC PC Engine/NEC PC Engine.kicad_pcb

NEC PC Engine PCB layout, top view — open source board by tebl

About the NEC PC Engine PCB

NEC PC Engine 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 58.4 × 38.1 mm, with 25 components from 11 distinct parts.

Other key parts include the 74HCT157. By type, the board carries 14 resistors, 4 modules, 3 connectors, 2 capacitors, 1 IC and 1 jumper.

It belongs with the retro computing, keyboards and test & measurement designs in this gallery.

From the project

WASD-style joystick for vintage computers. With an added Arduino Pro Micro you can use it as a USB-keyboard, so if you wanted a DIY streamdeck or Macro-keyboard - then the C64 JoyKEY can do that as well.

The NEC PC Engine, primarily found in the japanese markets as well as everywhere fans of the shoot em up genre could be found, had several revisions and third party controllers though most stuck with the regular four button configuration (I, II, RUN and SELECT). A picture of the completed adapter has been included below, including the jumpers needed on the C64 JoyKEY device itself. Making on requires a cable with the right shape, the simplest way of obtaining these is either cutting up a cheap extension cables.

NEC PC Engine, from the project README
From the project README

Main components on the NEC PC Engine

74HCT157

NEC PC Engine bill of materials (BOM)

25 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74HCT157
U1
4
Mounting
M1, M2, M3, M4
1
Port 1
J1
1
Port 2
J2
1
PC Engine
J3
1
VCC_EN
JP1
1
100nF
C1
1
10uF
C3
9
47k
R1, R3, R4, R5, R6, R7, R8, R9 +1
1
470
47k
R2
4
330
R11, R12, R13, R14

NEC PC Engine design files

The KiCad project lives in the tebl/C64-JoyKEY repository on GitHub; these links point at the commit this page was built from.

NEC PC Engine: common questions

How big is the NEC PC Engine PCB?

The NEC PC Engine measures 58.4 × 38.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the NEC PC Engine?

25 components, from 11 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 NEC PC Engine design files?

From the tebl/C64-JoyKEY repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the NEC PC Engine design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which tebl chose for the repository.

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