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Re: usb at pcmcia?
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On Jun 7, 2008, at 23:15, der Mouse wrote:
Does the WorkPad really have cardbus? I recall all hpcmips machines
I've seen being pcmcia only.
I'm actually not sure enough of the difference to be certain.
Cardbus is kind of PCI on crack - it supports stuff like DMA, 32bit
transfers and whatnot while PCMCIA ( or rather '16bit PC-Card'
formerly known as PCMCIA ) is 16bit and doesn't support any kind of
DMA. 16bit cards will fit into a cardbus slot but (usually) not the
other way around. If your card slot is 16bit only and lets you insert
a cardbus card you won't get anything useful ( so that's probably
what happened )
But a couple of the cards I've tried have been marked cardbus and
mechanically, just produced nothing at all by way of kernel messages.
I thought cardbus cards were mechanically icnompatible with older
slots, which is where I got the idea that it did cardbus.
Look at the row of connectors on the card ( as in - stare into the
holes ). There are small plastic bumps on each side. On the right
16bit cards have a thin bump ( about 1/4 of the connector's height,
at the bottom ) while cardbus cards have a much bigger one ( looks
like a little more than half the connector's height ). There are
cards out there though which are wrongly coded as 16bit while in
reality being cardbus.
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