Aak Media Keys.Md

# Apple Adjustable Keyboard Media Keys The Apple Adjustable Keyboard appears as two devices: | Original Address | Handler ID | Function | | ---------------- | ---------- | ---------------- | | 0x2 | 0x10 | Keyboard | | 0x7 | 0x02 | Media Key Device | ## Media Key Device ### Talk 0 Talk 0 behaves the same way as on a standard keyboard: it reports key events as bytes with the MSB set for a key release and clear for a key press, and scan codes in the lower seven bits. It reports a maximum of two such event bytes per Talk 0 request. If it has only one event to report, the event byte is followed by an 0xFF byte; if it has no events to report, no reply is given. The scan codes used by the media key device are as follows: | Key | Code | | -------- | ---- | | Volume ↑ | 0x03 | | Volume ↓ | 0x02 | | Mute | 0x01 | | Mic | 0x00 | ### Talk 1 Talk 1 appears to always return 0xFF02. ### Talk 2 Talk 2 appears to always return 0xFFFF. ### System Software Support Native support for the Volume Up/Down and Mute keys (but not the Mic key) was added with System 7.1 System Update 3.0[^1]. An extension called Record Button[^2] exists to provide support for the Mic key. ## Thanks *Thanks to Velociraptors and treellama on #68kmla for their help in compiling and verifying this information!* [^1]: <https://obsolete.macfixer.com/vintage-software/notes/System_Update_3.0_1.4MB.html> [^2]: <http://www.geocities.ws/ddurant/ext.html>