ROM and RAM Module for RC2014 Z80 computer with RomWBW CP/M style operating systemDesigned by RFC2795 Ltd in United Kingdom
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…Read More…
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.
This module is a combined 512k RAM and 512k ROM module that has been designed to run RomWBW operating system on the RC2014 with a Z80 CPU. Due to the 64k of addressable memory limitation of the Z80, the memory in this module is divided up in to multiple 32k pages.
It is designed to replace both the ROM and RAM modules in the RC2014 Classic, RC2014 Plus or RC2014 Pro, and can also be used with the RC2014 Mini if the ROM and RAM chips are removed.
The circuit is largely a reproduction of the ROM/RAM part of Sergey Kiselevs Zeta 2, with some modifications inspired by Dr Scott Bakers ROM/RAM Module
RomWBW is a ROM-based implementation of CP/M-80 2.2 and Z-System for all RetroBrew Computers Z80/Z180 hardware platforms including SBC 1/2, Zeta 1/2, N8, Mark IV, and RC2014. Virtually all RetroBrew hardware is supported including floppy, hard disk (IDE, CF Card, SD Card), Video, and keyboard. VT-100 terminal emulation is built-in.
The RomWBW ROM loads and runs the built-in operating systems directly from the ROM and includes a selection of standard/useful applications accessed via a ROM disk drive. A RAM disk drive is also provided to allow temporary file storage.
As the author of RomWBW, Wayne Warthen has ported this operating system to the RC2014, and it will auto-detect either the 68B50 ACIA or the SIO/2 UART, and will, if available, use the Compact Flash Module for storage. It can also support Ed Brindleys IDE Module and RTC Module, as well as Dr Scott Bakers WDC and FDC Floppy Disk Modules with a recompiled base image.
For detailed information on RomWBW see https://github.com/wwarthen/RomWBW
Standard Kit This includes all the components to build the 512k ROM 512k RAM Module, including PCB, RAM, pre-programmed ROM, Support chips and passive components.
PCB Only Go on, take a guess what this kit includes ;-)
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Bramcote, Nottingham, United Kingdom
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