[rescue] Compaq Proliant 8000
jdboyd at jdboyd.net
Thu Apr 29 09:18:17 CDT 2004
On Thu, Apr 29, 2004 at 09:09:44AM -0500, Jonathan C. Patschke wrote:
> IMO, a machine's degree of x86ness is determined by:
> 1) It has a CPU that implements the IA32 instruction set.
> 2) It has a "BIOS" with a "setup" program and not interactive firmware
> that lets you run diagnostics and such.
> 3) It gets its device tree by either peeking and poking "known
> locations" in the memory map or just assuming that certain non-core
> devices (like serial ports, video, disk controllers) will just
> happen to be mapped to certain addresses in I/O space. This is, of
> course, opposed to a proper FULL PCI probe.
> 4) It expects the boot sector of the boot device (which must be a
> disk) to follow the old broken PC-DOS INT 13h semantics.
> 5) Component quality (obviously a nebulous qualification).
> It's entirely possible to build non-PCs with 80386 processors. It's
> also possible to build near-PCs with other processors. I think it's
> fair to say that we all know what each other is talking about, though,
> and there's no need to be difficult.
I'd like to add a 6th qualification:
6) It doesn't boot a 32bit or 64bit CPU in 16bit mode until the
operating system takes over.
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