Re: Interesting occurance with my IIc

["Roger Johnstone" <rojaws@mac.com>]

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In article <26681-3A567D7E-150@storefull-152.iap.bryant.webtv.net>,
Seedbat@webtv.net wrote:


> I just hooked up a third UniDisk 3.5 to my IIc smartport (I also have a
> Disk IIc 5.25 in the end of the chain). Before I turned the computer on,
> I inserted disks in each of the UniDisks so I could test them together.
>
> When I turned the IIc on, the built-in 5.25 drive didn't make its usual
> chatter, and an assortment of characters appeared on the screen. When I
> did a three-finger reboot everything was fine.

It sounds like you were overloading the power supply. You had a total of 5
disk drives connected! They don't use much power when they're just sitting
there, and normally only one is ever being used at a time. But when you
start up the computer, and the UniDisk has a disk in it, I think it briefly
turns on the motor? I don't have any set up at the moment. If too much
current is drawn from the supply the voltage will drop, which could easily
cause the computer to crash.


> When I ran Beaglewrite (the only program I have on a 3.5 disk at the
> moment), it read the disk in the third UniDisk 3.5, which it considered
> a slot 2-1 device.

> Anyway, out of curiosity, why did my IIc react as it did when I turned
> it on? (It only happens when all three UniDisks are loaded.) Would this
> same problem occur if I had a IIc-compatable hard disk, 2 UniDisk 3.5s,
> and the Disk IIc 5.25 in the chain?
>
> Thanks.
>
> -RPM

It's not as likely to occur, since a hard drive would have it's own power
supply, rather than running from the IIc.

--
Roger Johnstone, Invercargill, New Zealand

Apple II - Future Cop:LAPD - Warcraft II
http://homepages.ihug.co.nz/~rojaws
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