4 Mar
2008
4 Mar
'08
9:10 p.m.
In LB stage, only PIC mode is applied, isn't it? However, I remember some people of LB community told me there was no ISR except the debug ISR during LB. So does this mean it totally unnecessary to setup PIC via C00h/C001h IO port in LB?
You need to set up the legacy PIC really early, since it doesn't initialise itself to any sane settings at bootup.
Segher