acct069@CARROLL1.CC.EDU (Ron) (05/01/91)
When ProDOS 8 boots there's a spurt of noise from the speaker. What is ProDOS doing to make it do this? Sometimes the noise is more of a short chirp than a spurt, does this have any significance? Doing a cold boot changes it from a chirp to a burst (the normal sound). -- Ron | Lightning Systems, INC. | Apple // Forever! acct069@carroll1.cc.edu | (414) 363-4282 60megs | I feel the need carroll1!acct069@uwm.edu | 14.4k HST/V.32bis | for more speed...
alfter@nevada.edu (SCOTT ALFTER) (05/01/91)
Here's a related question. We know that ProDOS 8 clicks the speaker when you boot it from a floppy. Why, then, does it click the speaker twice when I boot it from my HD? (40-meg Conner mechanism hooked up through an Apple DMA SCSI card, plugged into an enhanced IIe, if it matters.) Scott Alfter-----------------------------_/_---------------------------- Call the Skunk Works BBS (702) 896-2676 / v \ 6 PM-6 AM 300/1200/2400 Internet: alfter@uns-helios.nevada.edu ( ( Apple II: GEnie: S.ALFTER \_^_/ the power to be your best!
jdeitch@umiami.ir.miami.edu (Jonathan Deitch) (05/02/91)
alfter@nevada.edu (SCOTT ALFTER) writes: > Here's a related question. We know that ProDOS 8 clicks the speaker > when you boot it from a floppy. Why, then, does it click the speaker > twice when I boot it from my HD? (40-meg Conner mechanism hooked up > through an Apple DMA SCSI card, plugged into an enhanced IIe, if it > matters.) > > Scott Alfter-----------------------------_/_---------------------------- > Call the Skunk Works BBS (702) 896-2676 / v \ 6 PM-6 AM 300/1200/2400 > Internet: alfter@uns-helios.nevada.edu ( ( Apple II: > GEnie: S.ALFTER \_^_/ the power to be your best! Assuming here that you are also booting ProDOS 8 from the HD, my speculation is this : the click is simply part of ProDOS's initialization proccess. On my //c it clicks on both 5.25" drives and both Unidisk 3.5" drives. I don't see why it wouldn't click on a hard drive. I guess it just likes to remind you that you're speaker is there. Support the II ! - Jonathan ------------------------------------------------------------------------------ Internet : jdeitch@umiami.miami.edu | "Good musicians execute ------------------------------------------------- | their music but bad ones "I'm a Time Lord. I walk in eternity !" - Dr Who | murder it !!! "
edwatkeys@pro-sol.cts.com (Ed Watkeys) (05/02/91)
In-Reply-To: message from acct069@CARROLL1.CC.EDU Unless something is strange about your copy of ProDOS, all you should hear is a speaker click. I once read that writing to the speaker clicks it twice (and that you're always supposed to LDA $c030), so perhaps your speaker gets in the other position (there are two if I remember) and it sounds a tad different. To sum up: ProDOS just toggles the speaker, perhaps for some effect that emulates a mainframe or something similarly impressive, but anything I said beyond that is just theorizing (and probably wrong...) Ed Watkeys III Internet: edwatkeys@pro-sol.cts.com ProLine: edwatkeys@pro-sol UUCP: crash!pro-sol!edwatkeys ARPA: crash!pro-sol!edwatkeys@nosc.mil BitNET: edwatkeys%pro-sol.cts.com@nosc.mil
parkern@jacobs.CS.ORST.EDU (Neil Parker) (05/02/91)
In article <9105010233.AA21470@carroll1.cc.edu> acct069@CARROLL1.CC.EDU (Ron) writes: >When ProDOS 8 boots there's a spurt of noise from the speaker. What is >ProDOS doing to make it do this? Sometimes the noise is more of a short >chirp than a spurt, does this have any significance? Doing a cold boot >changes it from a chirp to a burst (the normal sound). The reason ProDOS makes noise when it boots is simple. There is a LDA $C030 instruction at the beginning of the routine that clears the screen and displays the intro message ("PRODOS 8 V1.x, COPYRIGHT...", etc.), and another LDA $C030 instruction at the end of this routine. I have no idea why those LDA $C030 instructions are there, nor do I have any idea why the sound seems to vary. - Neil Parker -- Neil Parker No cute ASCII art...no cute quote...no cute parkern@jacobs.cs.orst.edu disclaimer...no deposit, no return... parker@corona.uoregon.edu (This space intentionally left blank: )