Re: Firewire/USB Card for Qube 2

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

attroppa%yahoo.com@localhost wrote:

> My guess would be also from performance point of view
> with no DMA the USB will not take up to the desired
> speeds, but also the CPU will be screwed, because on
> large transfers it has to work hard, but after all it
> is just a MIPS old workhorse.

All ehci/uhci/ohci use DMA properly, but they don't
handle cache invalidate/writeback on their DMA ops,
which is required by most MIPS based machines
but not necessary for x86 PCs.
---
Izumi Tsutsui