q650 Rom Tuning Fork

File	q650-rom-tuning-fork.hqx
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--========================_13662222==_ Content-Type: text/plain; charset="us-ascii" Hi everyone, Apple's ROM crew has done it again: I own a Centris 650. The other day, I powered up my Mac, and decided that I should immediatley turn off my Mac so the DAT drive could power up first. Instead of just turning the power off, I hit the interrupt button. I heard this interesting =-D tune come from my Mac. I'm not sure, but I think it's a hidden ROM thing that patches the interrupt key. In the past, I've heard that Quadra 840av's exhibit a wierd quality like this too when the power key is held down... except it drops you into a monitor type thing instead of a tune. Here are steps to reprodue this: 1) Hit the Power Key on the keyboard. (I dont think it matters, as long as your Mac is _off_ initially. It would be cool if someone or I could figure out a way to make it do this on every restart. :-) 2) Listen for the "Bzzzzzzzzt" of the power supply getting power. 3) While listening, within 2 seconds of turning it on, hit the interrupt key. 4) Enjoy the short tune it plays. I checked; pressing some keys on the keyboard does not make the Mac act like a MIDI keyboard based on which key was pressed. :-( For the rest of you who might not have a chance to hear the tune, I tape recorded and then digitized what the C650 plays. 22KHz so that you can analyze it if you like--sorry about the background noise. In the C650 ROM also is a "Brass Horn" beep. It sounds like a little horn that squeaks on a kid's bike. I wont include that, probably because of pattent/copyright violations. :-) (Hint: Use ROMmie to get your Mac's ROM resource and look for sounds using ResEdit. I believe it's on info-mac in /dev.) One thing I would like to pose is this: could something, even more special, happen if the music's note-representation were typed in? =-D