>Hi:
>
>I am taking a big step, and programming a 486 board, with an embedded
>application (i.e., no OS). Where I want to start is by testing out the
>start up code and some very simple code.
>
>What I am looking for, is a some rom monitor code which would work on a
>486 PC board, in place of the BIOS.
>
>Anybody have any ideas ?
Yes, make an extension BIOS. Replacing the main BIOS is generally not
feasible because you don't know what hardware specific initialisations
are required by the CPU support chipset. Go to members.xoom.com/ken_yap
and search down the page for the article I was invited to submit to TCJ
(but TCJ seemed to have stopped publishing just after I submitted) on
a ROMable terminal emulator. The technique works with anything from an
XT upwards.
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