Digital Output Module For RC2014 Z80 Computer

Name: Digital Output Module For RC2014 Z80 Computer
SKU: 7486
Price: 16.92 USD
Availability: Discontinued
Rating: 4.42 (3 reviews)

(3 Reviews)

A kit of parts to build the Digital Output module for a RC2014 homebrew computer

Designed by RFC2795 Ltd in United Kingdom

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Digital Output Module For RC2014 Z80 Computer 1

Digital Output Module For RC2014 Z80 Computer 2

Digital Output Module For RC2014 Z80 Computer 3

Digital Output Module For RC2014 Z80 Computer 4

A kit of parts to build the Digital Output module for a RC2014 homebrew computer

What is RC2014? RC2014 is a simple 8 bit Z80 based modular computer. It is inspired by the home built computers of the late 70s and computer revolution of the early 80s. It is not a clone of anythi…

What is RC2014?

RC2014 is a simple 8 bit Z80 based modular computer. It is inspired by the home built computers of the late 70s and computer revolution of the early 80s. It is not a clone of anything specific, but there are suggestions of the ZX81, UK101, S100, Superboard II and Apple I in here. It nominally has 8K ROM, 32K RAM, runs at 7.3728MHz and communicates over serial at 115,200 baud.

As a bare minimum, you will need a CPU, ROM, RAM, Clock and Input/Output module. The RC2014 is designed in such a way that you can build your own modules to expand it. As such, if you have access to similar components, or have specific needs, you might not need all the items I have on offer.

What do I get?

This listing is for a kit of parts to build the Digital Output module only. For the rest of the modules, see my other products. This kit allows you to control 3 banks of 8 individual output lines from simple BASIC commands or Z80 assembly language. These lines are bought out on 0.1" header pins for you to connect to your own circuits up to a maximum of 25ma per output pin.

Choose from 2 options:

1. Full Kit - This includes all the components to build up the Digital Output module including:

header pins
chip sockets
logic chips

2. PCB Only - Yup, you guessed it. Only the bare PCB!

All components are new.

Review Breakdown

Average Ratings

Product: (5.00)

Documentation: (3.33)

Shipping: (5.00)

Communication: (4.33)

Olev | April 3, 2020

Very good kit

Having assembled the RC2014 Pro kit, I decided to add some digital I/O to it, and chose the Digital Output Module.
The shipment was as quick as it could be in this Covid-world.
All parts were there and intact.
Sorting them out I discovered that the card is one with tight address decoding, but the documentation described the earlier version. Three output addresses are needed to control 24 output bits -- 0, 1, and 2. For the earlier card, every output port modulo 4 would do. Which was a waste of precious address space.
The card I got has address lines A2, ..., A7 ORed via 1N4148 diodes, so it reacts only to addresses 0, ... 3. Nice.
The card was easy to assemble and started to work at first try.

Summary: nice kit, extremely easy to control. Great service, thanks, Spencer!

Greg | Dec. 10, 2019

Could be a lot better

Delivery was fine. Product completeness was great. Assembly was trivial. Documentation, as always, is terrible. My boards arrived as Rev 2.0. I don't know what rev the boards are that are featured in the online documentation, probably rev 1.0. My boards have a diode synthesized and gate for address decoding; but not a single diode on the schematic. So my schematic does not match my board, should make usage tricky. The design is simple, and I can figure it out, it just would have been nice to have good doc. Other than the doc, the board appears to be a nice one, I haven't figured usage out just yet.

Milan | July 11, 2018