Emulated Woz Machine

Introduction

Two years ago between christmas and new year I wrote a tiny and incomplete 6502 emulator and turned it into an original Apple 1 emulator. It was a fun and nostalgic project to work on. I grew up with the Apple II and never had a change to see an Apple 1 in action.

A few weeks ago I decided to pick this project up again. I am extremely motivated to turn this into a high quality emulator that supports the Apple 1, Replica 1, Apple ][+ and Apple IIe. Some of that work is really close to being finished, other work will take many months of spare time hacking.

Goals & Status

Here are some of the things I want to accomplish for each emulated machine:

CPU Emulator

• ~~6502 support~~
• ~~65C02 support~~
• ~~Tracing facility~~
• Debugger
• Speed throttling

Apple 1

8K / 6502 / Classic ROM

• ~~Terminal based emulation~~
• ~~Classic display emulation (SDL based)~~
• Cassette interface

Replica 1

32K / 65C02 / KRUSADER ROM

• ~~Terminal based emulation~~
• ~~Classic display emulation (SDL based)~~
• Cassette interface
• CFFA1 Support

Apple ][+

48K / 6502

• ~~Basic Apple ][+ architecture implementation - In progress~~
• ~~Disk II emulation - In progress~~
• ~~Display Emulation - 40 Column mode~~
• ~~Display Emulation - Low resolution graphics~~
• ~~Apple Language Card~~
• ~~Joystick Support~~
• Audio Support
• Display Emulation - High resolution graphics - Mostly works.

Building the emulator

cd src
make

Running the emulator

From the command line:

./src/ewm two --color --drive1 disks/DOS33-SamplePrograms.dsk