prodos-drivers/README.md

The Cricket - ProDOS Clock Driver

I acquired a Cricket sound/clock peripheral on eBay. Therefore it is now critical that we have a conforming ProDOS clock driver for it.

STATUS: Works on my machine!

Background

"The Cricket" by Street Electronics Corporation, released in 1984, is a hardware peripheral for the Apple //c computer. It plugs into the serial port and offers a multi-voice sound synthesizer, a speech synthesizer, and a real-time clock.

The included disks include:

• /CRICKET/PRODOS.MOD which can be BRUN to patch ProDOS in memory with a clock driver.
• A modified version of ProDOS
• A utility to patch ProDOS on disk

Goals

Like the NS.CLOCK.SYSTEM (by "CAP") ideally we would have:

• A ProDOS .SYSTEM file
• Detects the presence of a Cricket
• Installs a driver in memory following the ProDOS clock driver protocol
• Chains to the next .SYSTEM file (e.g. BASIC.SYSTEM)

Successfully tested on real hardware. (Laser 128EX, including at 3x speed.)