This is a simplified 6502 computer motherboard. It's designed to be simple, compact, and easy to use. The schematics are derived from the Ben Eater 6502 series.
This schematic is available for anyone to view, edit, and clone.
9.23.2020 - PCB REV 1.1: Now using only a 2-layer PCB for cheaper production costs.
Replaces TI99/4A power board to allow it to be powered with a 13v to 19v DC Power Supply
Make sure to check the pinout on your original power board, the pinout is the same as my (UK) model but i've heard there are different pinouts on other models, so you may need to make an adapter cable
The MK-6502 Computer is a custom, bare-bones 6502 Computer design based upon the Ben Eater 6502 series.
Intended for use with the W65C02S Microprocessor, W65C21 Versatile Interface Adapter, AS6C62256A Static RAM, AT28C256-15PU EEPROM, SN74HCT00N NAND Gates, and SG-531P 10.0000MC 10MHz Clock.
This is a CP/M 2.2 computer (pre-IBM). It is working.
It is unique in that it uses the the SIM/RIM instructions and SID/SOD/RST6.5 pins for Serial IO. It uses a 5V USB serial adapter for power and communication to your computer (using a serial terminal program).
There two problems with this approach in that the processing delays between Serial IO means that character can be missed if data is sen...
Arduino Mega ADK based project to allow remote control of computer's power state (IPMI style working with any computer).
GitHub Repository : [https://github.com/karnalta/KNPowerManager](https://github.com/karnalta/KNPowerManager)
This circuit uses the Buck/Boost Converter circuit for typically for use in a lab bench power supply. It features both adjustable voltage AND current using potentiometers.
Without a buck/boost converter,a computer power supply can only provide a 3.3V, 5V and 12 supply lines. With the buck/boost converter created with the aid of a 555 timer, adjustable voltage is allowed. A simple transistor is us...