Messages in this thread | | | Date | Thu, 27 Aug 1998 22:48:36 +0200 | From | Martin Mares <> | Subject | Re: IDE-Driver Update :: Testing Requested (Ultra33 as RAID?? (fwd)) |
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Hello,
> I have one. > > The board uses a single PCI interrupt when in "native" mode, > and a pair of interrupts when in "compatibility" mode (IRQ14/15), > as do *all* compliant PCI IDE controllers. > > Note the confusion may simply be that a *single* "IDE controller" > these days always supports *two* hwif's (interfaces). > > The Promise RAID card is identical to the Promise Ultra33 IDE card, > except for a different on-board BIOS.
I'm not sure about how does the IRQ compatibility mode work. The PCI bus itself has no chance how to transmit any IRQ different from the standard IRQ A/B/C/D pins. It must be either a planar device connected to non-PCI IRQ pins or the BIOS must have routed the standard IRQ pins of that card to IRQ 14/15. Anyway, if it's a real PCI card and it uses only IRQ A, there is no chance to have it generate two different IRQ numbers.
Have a nice fortnight -- Martin `MJ' Mares <mj@ucw.cz> http://atrey.karlin.mff.cuni.cz/~mj/ Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth "Linux hackers are funny people -- they count the time in patchlevels."
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