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Message-ID: <47E68423.2010507@zytor.com>
Date: Sun, 23 Mar 2008 09:24:03 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Boaz Harrosh <bharrosh@...asas.com>
CC: Matthew Wilcox <matthew@....cx>,
James Bottomley <James.Bottomley@...senPartnership.com>,
linux-scsi <linux-scsi@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: ultrastor.c is a bit-rot
Boaz Harrosh wrote:
> On Fri, Mar 21 2008 at 22:41 +0200, "H. Peter Anvin" <hpa@...or.com> wrote:
>> Matthew Wilcox wrote:
>>> VESA Local Bus. It was (in some sense) the predecessor of AGP. We
>>> treat it like ISA inside the kernel. On x86, EISA depends on ISA, so
>>> the dependency, while wrong, does not affect any x86 users who have an
>>> EISA card.
>>>
>> Well, one can say VLB was to ISA (a souped-up ISA bus with some of the
>> worst limitations removed) what AGP is to PCI...
>>
>> -hpa
>
> Hmm interesting, so someone took the VGA thing and made a storage device
> for it. Did that ever happen with AGP? Any AGP scsi cards. I guess I can
> Google for it.
A lot less likely, IMO. Unlike AGP-PCI, VLB slots were compatible with
ISA cards, and the electricals were less complex, so several motherboard
manufacturers built boards with 3 or more VESA slots (I think I saw a
board with 6 at one point.)
AGP electricals pretty much require that it be point to point.
-hpa
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