Re: [MiNT] update:WRITE_BOOT,ALLOW_TRP_CHG

[Vincent Rivière <vincent.riviere@freesbee.fr>]

On 04/10/2012 15:33, Helmut Karlowski wrote:
> > No, VBR. Vector Base Register. It determines the location of the trap
> > vectors in memory. On 68000, it's implicitly zero since there is no
> > VBR, but on 010+ it can be changed.
>
> Where is it?

The VBR is a special register which can only be accessed with the movec 
supervisor instruction.

movec   vbr,d0
movec   d0,vbr

NB: The VBR and most other control registers are read-only on ColdFire, this 
is very annoying.

--
Vincent Rivière