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Zx interface-2-rom

zxinfo-diy-electronics·zx-interface-2-rom

Zx interface-2-rom PCB layout, top view — open source board by zxinfo-diy-electronics

About the Zx interface-2-rom PCB

Zx interface-2-rom is an open source PCB design by zxinfo-diy-electronics, published on GitHub. It is a 2-layer board measuring 39.4 × 50.1 mm, with 8 components from 6 distinct parts.

Other key parts include the W27C512 and 74LS32. By type, the board carries 2 ICs, 2 capacitors, 2 resistors, 1 connector and 1 switch.

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

From the project

Another custom ROM cartridge for ZX Interface 2, supporting 64Kb EPROM with manual ROM selection using switch

- Most important error is that I forgot to check the pads, I simply forgot to check that the pads are added to the solder mask layer! So as can be seen on the image, I had to carefully scrabe the surface - for the pads to be visible.

- The switch are "mirrored" in my oppinion, I would expect the left switch to be the most significant bit (MSB) - so another change for next version.

Main components on the Zx interface-2-rom

W27C51274LS32

Zx interface-2-rom bill of materials (BOM)

8 components, 6 distinct parts.

QtyPartRefs
1
W27C512
U1
1
74LS32
U2
1
cartridge_IF2
J1
1
ROM select
SW1
2
100nF
C1, C2
2
10K
R1, R2

Zx interface-2-rom design files

The KiCad project lives in the zxinfo-diy-electronics/zx-interface-2-rom repository on GitHub; these links point at the commit this page was built from.

Zx interface-2-rom: common questions

How big is the Zx interface-2-rom PCB?

The Zx interface-2-rom measures 39.4 × 50.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Zx interface-2-rom?

8 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the Zx interface-2-rom design files?

From the zxinfo-diy-electronics/zx-interface-2-rom repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Zx interface-2-rom design in my own project?

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

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