MCM776x CharGen Adapter

RetroStack·MCM776x_CharGen_Adapter·KiCAD/MCM776x_Character_Generator_Adapter.kicad_pcb

MCM776x CharGen Adapter PCB layout, top view — open source board by RetroStack

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About the MCM776x CharGen Adapter PCB

MCM776x CharGen Adapter is an open source PCB design by RetroStack, published on GitHub under the MIT license. It is a 2-layer board measuring 18.3 × 51.2 mm, with 5 components from 5 distinct parts.

Other key parts include the 2X64-2X512. By type, the board carries 2 ICs, 2 connectors and 1 resistor.

It belongs with the retro computing designs in this gallery.

From the project

Hardware adapter to replace a MCM776x character generator with a ROM (e.g. MCM7760, MMC7764 used in TRS-80 Model 1)

This repository provides an adapter for the Motorola MCM6670 and related (MCM667x series) character generators for vintage computers. ROMs with various character sets are provided in a separate repository. The entire project is available under the MIT license.

In the "Latest" folder, you'll find the most up-to-date design files, including:

- Gerber files suitable for popular online PCB manufacturers like PCBWay and JLCPCB. Most manufacturers should be fine with either. - A Bill of Materials (BOM) in both CSV (with sources) and PDF formats. - Layers exported in PDF format. - The full…

MCM776x CharGen Adapter, from the project README — From the project README

Main components on the MCM776x CharGen Adapter

MCM776x CharGen Adapter bill of materials (BOM)

5 components, 5 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	Conn_02x09_Counter_Clockwise	DIP-18_W7.62mm	U1
1	2X64-2X512 27512	DIP-28_W15.24mm	U2
1	Conn_02x05_Odd_Even	PinHeader_2x05_P2.54mm_Vertical	J1
1	Conn_02x06_Odd_Even	DIPJumper_6	J2
1	R_Network06	R_Array_SIP7	RN1

MCM776x CharGen Adapter design files

The KiCad project lives in the RetroStack/MCM776x_CharGen_Adapter repository on GitHub; these links point at the commit this page was built from.

MCM776x CharGen Adapter: common questions

How big is the MCM776x CharGen Adapter PCB?

The MCM776x CharGen Adapter measures 18.3 × 51.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MCM776x CharGen Adapter?

5 components, from 5 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 MCM776x CharGen Adapter design files?

From the RetroStack/MCM776x_CharGen_Adapter repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the MCM776x CharGen Adapter design in my own project?

Yes, under the terms of its MIT license, which RetroStack chose for the repository.

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