Re: auto-probe memory size during boot

Michael Liao (michael_l@hotmail.com)
Sun, 19 Jul 1998 21:37:04 PDT

>Your code doesnt account for holes, or more importantly for machines
where
>the memory wraps. You should also be sure to always write a different
value
>somewhere else before reading back your test value so you dont get it
>left floating on the bus and seeming valid.

Well, my code really doesn't account for holes, but Linux kernel use
a single <memory_start, memory_end> to describe physical memory
geometry, more strict way is using set of <base,size> pairs. I have to
time to hack more.

I should write a more complex memory testing code to verify which
region of memory is available.

>
>2.1.x uses the extended bios info calls which seems to cover every
machine
>people are likely to put 64Mb in
>

Please can me some more information about extended BIOS info call.
Eventually, I think there should be a revolution of BIOS interfaces, the
old one can make us happy, it should be added more flexible, productive
interfaces. Nowadays, there are many functional duplication between OS
and BIOS.

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