The N8VEM Home Brew Computer Project

N8VEM-Wikipedia-Page

Page history last edited by Andrew Lynch 11 mos ago

Unfortunately there is no N8VEM Wikipedia page because

"This request has been declined. The reviewer left the following comment:

We cannot accept unsourced suggestions or sources that are not reliable per the verifiability policy. Please provide reputable, third-party sources with your suggestions. Third party sources are needed both to establish the verifiability of the submission as well as its notability.

Please do not take it personally, but use the advice given to submit an article which meets the criteria.

Please note: You are encouraged to address the reasons for the decline and to resubmit this article after making improvements. When ready, please add the text {{AFC submission|P}} at the top of the article to request a new review."

However a draft exists in the submitted but not accepted queue:

http://en.wikipedia.org/wiki/Wikipedia_talk:Articles_for_creation/Submissions/N8VEM

The following is a draft in case Wikipedia ever deletes the submitted article or changes their minds.

N8VEM is a Z80 CP/M home brew computer project.

The N8VEM Single Board Computer is a home brew Z80 small computer project. It is made in the style of vintage computers of the mid to late 1970's and early 1980's using a mix of classic and modern technologies.

Designed with the free KiCad Electronic design automation (EDA) toolset. Printed Circuit Board routing provided by [FreeRouting.net] All software is developed in Z80/8085 assembly language using the following toolset for MSDOS called [Telemark Cross Assembler] (a.k.a. TASM) A major design goal is to use freely available tools to the maximum extent possible. You can help out too! The Printed Circuit Board design is supplemented using component libraries available here [KiCad Libraries], specifically the Zilog Z80 CPU and Intel 8255 PPI chips.

Encourages low cost development and assembly by hobbyist amateurs using common tools such as 25 watt soldering iron, multimeter, logic probe (optional), and common hand tools. An oscilloscope is recommended but not required. Some basic electronic skills are good but the Printed Circuit Board is designed for relative beginners.

Design principles include using low cost commonly available standard Transistor–transistor logic Dual In-line Package components such as 74LS using 0.1" spaced through hole technology. Design avoids usage of advanced printed circuit board construction techniques such as Surface-Mount Technology and custom and/or hard to obtain components. Also avoids usage of programmable devices such as Programmable Array Logic, Generic Array Logic, CPLD, and FPGA except for standard EPROM components.

Computer is designed to be a low cost Single Board Computer with simple IO. The current design supports a UART for serial IO and PPI for parallel IO. Includes Real-time clock for time keeping with battery back up and a small amount of NVRAM storage. While low cost is a key goal, the Single Board Computer is also designed to be a component in a larger bus based system. The Single Board Computer includes an [EuroCard Bus] connector.

The N8VEM Single Board Computer is supported by the SIMH simulator. The SIMH simulator allows for off target software development using a conventional personal computer.