Messages in this thread | | | Date | Sun, 23 Mar 2008 17:16:52 +0000 | From | Al Viro <> | Subject | Re: ultrastor.c is a bit-rot |
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On Sun, Mar 23, 2008 at 09:24:03AM -0700, H. Peter Anvin wrote:
> >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.
... not that VLB didn't suck badly with several devices attached at the same time. I would be rather surprised if that board would work if fully populated with VLB cards, all in active use. IOW, a likely explanation is that it had a warning along the lines of "use of more than <number> of VLB cards at the same time may use instability" buried in documentation and proud "6 VLB slots!!!" touted by marketing...
I can't find VLB specs online, but IIRC 3 had been the limit and anything past that had been very much out of spec and likely to screw you.
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