Sorry. I make a mistake. I mix up the PCMCIA and Card bus. They share the same slot and have the same pcmcia-cs pakcage.
The problem is that "PCMCIA" is really a form factor, one that supports several different kinds of electrical signaling:
- ISA ... the original version, called "PCMCIA" from day one - PCI ... "CardBus", started the confusion - USB ... "CardBay", USB 2.0 (may not be "real" yet)
And then there's the CF format, using ISA/PCMCIA signals for things like memory and, for PDAs, network adapters, also handled by "pcmca-cs".
Blame the confusion on the folk who just market "PCMCIA" instead "PC-Card" form factor. The "pcmcia-cs" package avoids the PCI (and USB!) drivers, though it does need to handle some of the "PC-Card" logic (to let normal PCI drivers handle CardBus devices, and so forth).
In regards to Ian's original question, there can be USB host controllers on ISA but they'd likely use PIO not DMA ... OHCI, UHCI, and EHCI are bad choices. Maybe the SL811HS can be packaged that way; it already has a Linux driver. Folk doing embedded products will have a better handle on the available silicon, since they often want simpler busses than PCI.
- Dave
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