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Date:      Fri, 21 Aug 1998 11:47:29 -0500
From:      Edwin Culp <eculp@webwizard.org.mx>
To:        Bill Paul <wpaul@skynet.ctr.columbia.edu>
Cc:        vallo@matti.ee, current@FreeBSD.ORG
Subject:   Re: Problems with vx0 (3Com)
Message-ID:  <35DDA4A1.CDD4D346@webwizard.org.mx>
References:  <199808211624.MAA14366@skynet.ctr.columbia.edu>

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Bill Paul wrote:

> Of all the gin joints in all the towns in all the world, Vallo Kallaste
> had to walk into mine and say:
>
> > Edwin Culp <eculp@webwizard.org.mx> wrote:
> >
> > > Anybody tried it with the 3c595, that poor folks like us might still have?
> > >
> > > Thanks
> >
> > ***
> >
> > I can try. About what are you interested ?
>
> The xl driver is for 3c90x cards only: this includes the 3c900 and 3c905
> "boomerang" adapters and the 3c905B "cyclone" adapters. The 3c59x cards
> are based on the "vortex" chipset, which actually does have a DMA mechanism
> but not the same as the "boomerang" and "cyclone" chips. The "boomerang"
> chips happened to work with the vx driver because 3Com maintained support
> for the old PIO packet transfer mechanism that the vx driver uses. But
> starting with the 3c905B, the PIO mechanism was dropped and now bus-master
> DMA is required. Since all 3c90x cards support the same DMA interface, I
> decided to split out all of the 3c90x support from the vx driver.
>
> The vx driver is still used for the 3c59x PCI cards; I only turned
> off support in the vx driver for the Etherlink XL PCI cards, not the
> Etherlink III PCI cards.
>
> -Bill

Thanks a lot.  You had me worried for a bit :-)

ed



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