64K RAM Module For RC2014 - Z80 Homebrew Computer

Name: 64K RAM Module For RC2014 - Z80 Homebrew Computer
SKU: 7987
Price: 22.42 USD
Availability: InStock
Rating: 4.81 (9 reviews)

(9 Reviews)

A kit of parts to build the 64K RAM module for a RC2014 computer

Designed by RFC2795 Ltd in United Kingdom

64K RAM Module For RC2014 - Z80 Homebrew Computer 1

64K RAM Module For RC2014 - Z80 Homebrew Computer 2

64K RAM Module For RC2014 - Z80 Homebrew Computer 3

64K RAM Module For RC2014 - Z80 Homebrew Computer 4

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A kit of parts to build the 64K RAM module for a RC2014 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 is the RAM module which is supplied with the RC2014 Pro or RC2014 CP/M Upgrade Kit, although it can also be used as a replacement for the CPU module supplied with the RC2014 Classic ][, or if you are building your own custom RC2014 variant. It can be used with Standard Bus backplanes (Backplane 5 or Backplane 8) with single row header pins, or with Enhanced Bus backplanes (Backplane Pro) with double row header pins. If the Standard Bus option is chosen, then a 10 pin straight header is also supplied in case you need access to the /PAGE signals.

This listing is for a kit of parts to build the 64k RAM module only. For the rest of the modules, see my other products.

This module allows up to 64k of RAM to be used (The full addressable range of the Z80 CPU). To avoid overlapping with ROM, the start address (and therefore usable size) can be set via jumpers. So, for example, if you are using the MS BASIC ROM that ships with the RC2014, set the jumpers for the RAM to start at 0x2000 (8k) which will give you 56k of RAM.

In order to run CP/M, the lower 32k RAM can be enabled or disabled via a page pin driven by the Pageable ROM Module.

This module can be supplied as a 32k kit, in which case it will work exactly as the 32k RAM Module supplied with the RC2014 Classic ][ kit does. However, you can then use the RAM supplied with that kit to expand this one to the full 64k if required. (Additional IC sockets and jumpers/pins will be needed)

Full Kit - This includes all the components to build up the 64k RAM module including header pins, chip sockets, logic chips and 64k RAM.

32k Kit - As above, but with components to build the module with only 32k RAM

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

All components are new.

RC2014 is a trademark of RFC2795 Ltd.

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RFC2795 Ltd Shipping Policy:

Products are normally shipped next working day, however during busy periods this may extend slightly.

Tracked or Tracked & Signed options are available to most locations. This may not get your kit to you any quicker, but it adds peace of mind that you know where it has got to.

It is your responsibility to pay any import duty or other taxes where appropriate.

Important note for European Union customers Tindie is unable to comply with new EU tax regulations, so unfortunately I am no longer shipping to the EU via Tindie, but do sell them through a website which is does handle the VAT and tax payments.

Review Breakdown

Average Ratings

Product: (4.89)

Documentation: (4.56)

Shipping: (5.00)

Communication: (4.78)

Aleksandr Vladimirovich | Sept. 15, 2021

Nice kit.

Great kit! Packaged great. Сomprehensive documentation. Easy to assemble. The seller is a reliable person.

Marcin | Jan. 27, 2021

Excellent

Good quality PCB, easy to build, shipped out quickly. Tested together with z80ctrl board on RC2014 and works fine. Thanks!

Adrian | July 22, 2020

Get twice the RAM or slightly less!

This board gives your RC2014 a real upgrade! It gives you a new additional block of RAM with a variable size to match all your needs and ROM options. It even includes the option to map itself to ALL of the addressable space, giving you as an avid experimenter all the options for how to best make use of your RC2014 :)

Very happy with my new block of RAM and I'd highly recommend this to anyone with a RC2014 as it still works like the regular 32 kB board too.

Sean | June 22, 2020

Works great!

It got shipped out quickly, though it took a while to actually arrive with all the COVID-19 delays in the US. It only took about an hour to put together, though I am relatively experienced with assembly at this point. Worked perfectly once I figured out the right jumper settings to work with the z80ctrl board!

Tobias | Oct. 28, 2019

Nice upgrade

Very easy to assemble, the documentation for the jumper settings is simple, shipping to Germany was fast.

Dimitris | June 26, 2019

Very nice piece of kit

I really enjoyed building the kit. The quality of parts was great and all parts were carefully packed.

Mr C | Aug. 16, 2017

simple sensible design

This board allows you to max out the memory for your system while still allowing you to leave a hole at the start of the memory map for a rom

its a fairly straight forward build, with the usual good quality PCB

Eric | June 14, 2017

Great

The quality is top.
Worked on first power-up (once you remember to hit reset ! )
Modularity is maximum.
I'll be using it for learning hardware development, drawing schematics, routing PCBs, and such.

Dave | May 1, 2017

Never going to use it all!

What is there to say?.. Its perfect...

I am using it with
Back plane 8
Clock
Z80 CPU Board
Serial IO
and SD Card Dump Board.

It is good having all the memory available to use. So I can write the ROM routines.

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