Arduino6502

This is my Retrochallenge 2017/04 entry, a software only 6502 microprocessor system emulator for Arduino platforms.

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Installation

Assuming you have compatible hardware (see below). Installation and setup instructions are

1. Check out this repository and open arduino6502.ino in the Arduino IDE.
2. Upload the sketch to your Arduino.

That's it. Read on for usage instructions.

Usage

This simulator runs over the Arduino serial port at 9600 baud. You will need to use a terminal emulator to access the simulator. Once you've made a serial connection the simulator will restart and issue the prompt

\

Which is the sign that you are in the Woz monitor.

The sketch includes ROM images for AppleSoft Lite and Krusader symbolic assembler.

To run AppleSoft BASIC, enter

E000R

And you will be dropped into the BASIC prompt

>

Remember that the Apple 1 was an upper case only machine, so you should enter all letters in upper case.

Krusader is available at, $F000.

F000R

Linux instructions

I recommend screen(1) as the terminal emulator, sample usage:

screen /dev/tty.ACM0 9600

To exit the screen, press Ctrl-a k.

OS X instructions

I recommend screen(1) as the terminal emulator, sample usage:

screen /dev/tty.usbmodem1421 9600

To exit the screen, press Ctrl-a k.

note: the exact device name may be different on your system.

Windows instructions

TODO: Tera Term or PuTTY I guess. Anyone want to send a PR for Windows users.

Supported hardware

Currently only the Arduino Mega 2560 is supported. Support for Arduino Uno boards is planned,

Speed

On 8 bit Atmel platforms the performance is roughly 1/4 of the speed of a real 1Mhz 6502 system.

License

This project is licensed under a BSD "simplified" 2 clause licence.

Portions of this project (common.hpp, cpu.hpp, cpu.cpp) are copywrite Andrea Orru, see LICENSE.LaiNES.

This project contains ROM images from Vince Briel's Replica 1 project, including Applesoft lite BASIC and the original Woz monitor.