Re: ultrastor.c is a bit-rot

H. Peter Anvin
2008-03-23T16:29:16Z

Boaz Harrosh wrote:
> On Fri, Mar 21 2008 at 22:41 +0200, "H. Peter Anvin" <hpa@zytor.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