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MK1 8bit Computer
Schematics and code for my home-made 8-bit CPU and its companion boards.
Articles about this project:
Overview
During the past month, I designed and built a programmable 8-bit CPU from scratch, out of basic series 74LS logic ICs.
This repository contains pictures, schematics, and code for this project and its companion boards.
- V 1.0 assembled:
- V 2.0b assembled:
- Helix Display Interface in action:
- V 1.0 in action:
DEMO VIDEO (YouTube)
Architecture
The MK1 CPU is composed of several modules, all connected trough a common 8-bit BUS, the status of each module is shown by dedicated LEDs.
- The clock module is designed to allow step-by-step execution; in automatic mode the clock speed can be adjusted from 1Hz up to 32KHz.
- The computer programs are stored in RAM and the CPU can be programmed both manually, by inserting binary machine code through dip-switches, and automatically via a USB PC interface.
- The Programming interface is designed to be used in conjunction with an Arduino Nano or the Start9 programming board.
- The Start9 programming board allows the loading of multiple programs stored on an on-board flash memory without the aid of an external computer device.
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