About

The Ohio Scientific Superboard II (Model 600) was a single-board computer from the late 1970s featuring a MOS 6502 CPU running at ~1 MHz, 8KB BASIC in ROM, and a 32×32 character-mapped video display.

Getting Started

1. Upload your legally-obtained ROM files: BASIC.ROM, SYN600.ROM, and CHARGEN.ROM
2. Click POWER to boot the machine
3. The Monitor ROM will display D/C/W/M? — press D for cold start or W for warm start

Keyboard Mapping

Your physical keyboard maps directly. Special keys:

• Escape → ESC
• Enter → RETURN
• Backspace → RUB OUT
• Ctrl → CTRL
• CapsLock → SHIFT LOCK
• F5 → LINE FEED
• F9 → BREAK (Reset)

Cassette Interface

Load any file as cassette data. Click PLAY to feed bytes through the 6850 ACIA at $FC00. Use REC to capture output.

Legal Note

⚠ Please provide your own legally obtained ROM files. This emulator does not include any copyrighted ROM data.