Apple 1 Emulator

Introduction

This is an Apple 1 emulator for the SAM Coupé. It emulates the first Apple home computer, a 6502-based machine developed by Steve Wozniak and released in 1976.

Features

• Full 65C02 emulation.
• 56K free for RAM and ROMs.
• 50Hz/100Hz terminal I/O.
• Type-in feature for text code listings (SimCoupe only).

The emulator runs at 100% speed during the interactive portions of programs, and up to 20% during CPU-intensive processing, depending on the mix of 6502 instructions used.

Download

Version 1.4, last updated 1st March 2014 [view ChangeLog].

Apple 1 Emulator (18K)
Source Code (GitHub)
Apple 1 monitor manual (2.8MB)

Software

For convenience, the emulator is pre-loaded with the following software:

• Tom Greene’s port of Applesoft BASIC at address 6000.
• Ken Wessen’s custom BASIC at E000.
• Ken Wessen’s Krusader assembler at F000.

Enter 6000R at the monitor prompt to launch Applesoft BASIC, etc.

Type-ins

A type-in feature is also available, allowing text listings to be entered as though typed manually. This feature is available to SimCoupe users only, and can be used as follows:

• Press F4 for data import.
• Change Import Type to Main Memory.
• Select Page 6 and Offset 0.
• Click OK and select the file to import.

Ensure you’re already in the correct mode/program for the input. Press Esc to cancel an active listing.

Controls

In SimCoupe, use Ctrl for Symbol key modifier.

Screenshots