6502 Microprocessor Based Homemade Single Board Computer

by Samartist in Circuits > Computers

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6502 Microprocessor Based Homemade Single Board Computer

samarth retco 100 1.jpg

Homemade 6502-based single board computer

This is a 6502 microprocessor based homemade single board computer. The video shows the working of the board. Better quality video can be downloaded from this link: https://drive.google.com/file/d/1bJ89bsxlCCqAhRXRMoDq75HlySIBsq2r/view?usp=sharing

Supplies

RETCO-100 Schematic.jpg

Address Bus LED Module.png

Address Line Swtich Module.png

Clock Module.png

Data Bus LED Module.png

Data Line Swtich Module.png

Microprocessor Module.png

Not Gate Module.png

RUN LOAD Buttons.png

SRAM Module.png

This is the circuit diagram of the whole computer, divided into multiple modules.

Buttons and IC-base Placement

In the first step, solder the buttons (flip flop switches) and the IC bases on the dotted PCB. Size of the PCB board is 19 cm x 22 cm.

Add 555 IC Based Clock Module

Make the Connections Between the Microprocessor and SDRAM

Make Connections Between the Data and Address Bus Flip-flops Buttons and the Buffer IC

Make Connections Between the Buffer ICs and the Data and Address Bus

Making the Extension Boards

LED board.png

Downloads

LED chaser demo.mp4

LED chaser wo lights.mp4

Programming the Computer

Homemade 6502-based single board computer

The tutorial for programming the board is shown in this youtube video: https://youtu.be/vbl0bdB9x98