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Re: On I/O and memory address space
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: On I/O and memory address space
- From: Ali Najafi <alinajafi@simei.aztech.com.sg>
- Date: Tue, 11 Feb 1997 20:55:41 +0800
- Resent-Date: Tue, 11 Feb 1997 20:55:41 +0800
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"cNONG.0.m_1.xj60p"@dart>
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>as long as you keep them to 256B apiece, I see no reason why BIOSes
>should have any trouble with them. If it's the resource consumption
>issue that you're worried about (the fact that one of your cards will
>eat three times the amount of I/O space used by a typical LAN or SCSI
>device), then you need to take the larger issues of system
>configuration into account. How much total I/O space will be
>available for *all* PCI devices on the platforms you're targeting?
As for now, I am targetting for x86 platform. PCI spec does not specifically
put any limit on the total amount of I/O address space on a system except
that an I/O address is 32 bits, but I do not know how much BIOS (or
different BIOS's) really allocate. It also depends on the CPU limitations.
>----------------------------------------------------------------------
>Bob Goudreau Data General Corporation
>goudreau@dg-rtp.dg.com 62 Alexander Drive
>+1 919 248 6231 Research Triangle Park, NC 27709, USA
>
>
~ ¬ ™