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Citon X600
Junior Member


Canada
206 Posts
Posted - 05 Jun 2003 :  13:29:44
Well I am really curious if anyone can explain the technical reason why when a Mac reads a floppy disk why sometimes the cursor suddenly gets sluggish and "jumps" around the screen instead of glides.

I notice it especially when you boot from floppies or if you are install software. Nothing that can't be fixed with making disk images.

I also notice on some Macs that CD's do the same thing, but by installing CD ROM Speedtools it goes away. Would the same solution work for floppies? (I assume the CD uses a different driver with unique cache settings)

Just another oddity I have always wondered about.

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emaq123
Junior Member


USA
258 Posts
Posted - 05 Jun 2003 :  14:21:54
MacOS (not Mac OS X) uses co-operative multitasking. This means the computer switches from one job to another when the process running gives up control. This means that if a program decides to hog the cpu, everything will freeze up. So what you are seeing is the disk driver eating up to much cpu for the mouse pointer to update.

emaq123

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stonent
Junior Member


USA
155 Posts
Posted - 07 Jun 2003 :  15:46:13
MacOS up to 9.x's had the same basic style multitasking system as Windows 3.1. Win95 introducted a more NT like preemptive system.

OSX has been needed since the mid 90's. I wonder what it had been like if it came out that far back? Maybe as Rhapsody?

That's always been my gripe about Classic MacOS, all crashed were pretty much deadly.

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