Messages in this thread | | | From | (Alan Cox) | Subject | Re: I/O permissions for V86 tasks (Enhanced V86 Mode)? | Date | Fri, 17 Jul 1998 16:40:39 +0100 (BST) |
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> bitmap having a fixed size. Not having the Intel docs in front of me > at the moment I can't remember whether that is enforced by the processor > but I suspect that it is. All the stuff after the IO bitmap is purely
It is but....
> for Linux's benefit and not used by the processor. Now fortunately if > you can fix that then that's basically all there is to be fixed, but it > seems like a biggie.
That depends - why not put the task structure at the other end, after all the Linux bits. Now you can just extend it ?
> Besides, that will only work on Intel Pentiums and I guess you want to > support 486 too, not to mention other manufacturers who may or may not > have an EVM86 mode.
Later 486's have it
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