Quick one,
The bios32 sd (found with '_32_') only provides 32bit interface, no 64bit correct... so in which case is there anything I would need from it specifically in a 64bit kernel? or would this be 100% superseded by ACPI?
Same goes for PnP bios ('$PnP' lookup) ... this can at least be used in real mode for a while before switching to the kernel, but once again would this be obsolete with acpi/pci mmio etc?
John
bios32 and pnpbios obsolete?
Re: bios32 and pnpbios obsolete?
while on the subject.. what about the apm bios?
My boot code locates it under all the emulators, bochs/qemu etc.. and connects it's 32bit interface and all the rest.. but once again this is no use from a 64bit kernel.. and in fact on testing on real h/w.. the 4 machines I've tested (fairly new'ish pcs) don't even find an apm bios.. once again supercede by acpi ?
My boot code locates it under all the emulators, bochs/qemu etc.. and connects it's 32bit interface and all the rest.. but once again this is no use from a 64bit kernel.. and in fact on testing on real h/w.. the 4 machines I've tested (fairly new'ish pcs) don't even find an apm bios.. once again supercede by acpi ?
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JohnnyTheDon
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Re: bios32 and pnpbios obsolete?
AFAIK they are pretty much obsolete in newer computers. You may want to support APM, PNP, and BIOS32 if you're worried about older computers, but thats not really useful for a 64-bit operating system because all x86-64 systems have ACPI because Windows requires it.
So start working on an AML interpreter
So start working on an AML interpreter
Re: bios32 and pnpbios obsolete?
Or better yet, use Intel's ACPICA.JohnnyTheDon wrote:So start working on an AML interpreter :)
JAL