Re: A89: How does a 68000 program get into supervisor mode ?
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Re: A89: How does a 68000 program get into supervisor mode ?
>How would I be able to switch into supervisor mode on a 68000 for a program
>that needs it ?
This is quite simple, I think: Have a look at, for example gray4lib!
move.w #$0700,d0
trap #1
This will set the highest interrupt mask, which will in fact disable all
interrupts. What it does is writing #$07 to the system byte. So now, by
using this you get the TI-89 in supervisor mode:
move.w #$2700,d0
trap #1
Now, you have access to some more instructions! If it doesn't work, mail me
at
mike_emk@hotmail.com
I haven't got my computer at home right now, it's getting serviced because I
had some minor hardware problems. However when I get it back I'll have a
look at one of my progs which uses supervisor mode (just experimented with
it...) because I'm not exactly sure if I used #$2700 or anything else
See ya,
Michael Kristiansen
mike_emk@hotmail.com
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