Compaq Evo 510 PC & DMA
vdemart1 at tin.it
Thu Nov 3 17:03:47 GMT 2005
Some time ago I had posted a problem I was suffering trying to install
freebsd 5.4 on a Compaq evo 510 PC. The boot immediatedly stopped with
weird indications on the causes. Freesbie also failed. Surfing the net
I understood that the problem with that specific PC was already known
and no real solution was proposed.
Today I came across http://www.
czaplinski.net/FreeBSD/hpi386.html in which it was suggested that
CPU: 2.8 GHz P4; 1024MB RAM; i810 Intel integrated NIC (recognized
as EEPro100); i845 Intel integrated video...FreeBSD 5.1 loads, but only
after DMA is disabled in BIOS.
In fact, disabling the bios dma I was
able to start both freesbie and the 5.4 installation CD!
Not being a
PC expert but knowing that dma is useful to significantly reduce the
load of the CPU when I/O operations are in progress and my question is:
Having disabled the bios dma, Is dma (re-)enabled all the same in some
way by freebsd 5.4 when it boots OR will I have a "crippled" system
at my disposal?
Take into account that the pc will work as a
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