--- On Thu, 1/14/10, tortoise <[email protected]> wrote:

> From: tortoise <[email protected]>
> Subject: Re: ImageWriter... and fighting with Chooser
> To: "Vintage Macs" <[email protected]>
> Date: Thursday, January 14, 2010, 7:25 PM
> 
> 
> On Jan 12, 1:51 am, [email protected]
> wrote:
> > ADB DEFINITIVLY is hot pluggable - but the cdev
> settings have to be adjusted.
> > SCSI is not.
> >
> To hotplug SCSI you need scsi probe to access / mount a
> hard drive.  I
> did it last week.
> 
> When I have hotplug ADB (whoops the kb / mouse wasn't
> plugged in). I
> get a "slow mouse" but things do work.
> Tablets don't get loaded as tablet though they may work in
> mouse mode.
> 
> Supposed to be very careful to insert the plug straight on
> so all pins hit at the same instant.

Most hot-pluggable connections have the power connections longer than the data 
connections so the device gets powered up before making the data linkup.

USB, FireWire, Compact Flash, PCMCIA/CardBus, SD and most other memory cards 
are that way.

"Legacy" connectors like ADB, PS/2, serial, parallel, SCSI etc have all 
connectors the same length.

I suppose in theory that an ADB plug with the power and ground pins slightly 
longer than the other two pins might be hot-pluggable, but there'd still be the 
issue of the software side not being written to handle devices suddenly 
appearing and vanishing.



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