Re: Memory being incorrected sized at boot-up

H. Peter Anvin (hpa@transmeta.com)
11 Jul 1997 22:02:31 GMT

Followup to: <19970711222654.18698@atrey.karlin.mff.cuni.cz>
By author: Martin Mares <mj@atrey.karlin.mff.cuni.cz>
In newsgroup: linux.dev.kernel
>
> > Please talk to me about this offline. I'm the author of the 2.0.30
> > memory detection code. I think what's happening is the that Compaq
> > BIOS reports only 16MB of RAM for the int 15h, ah=0x88 BIOS call on
> > the Compaq. The fix for this is to change the BIOS detection code to
> > use the 0xe801 call first, and then fallback if this fails.
>
> Are you sure 0xe801 won't crash on bioses that don't implement
> it? I.e., mostly on ancient 386's ? ... but probably the best thing
> will be to test it in the 2.1 kernels before putting it to the
> mainstream ones.
>

This has been in 2.1 for quite a while. In fact, there are also two
new BIOS calls (one being int 0x15:0xe820) that may be considered...

-hpa

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