[Coco] Question about MPI behavior

[Darren A]

On Mon, Apr 16, 2012 at 2:02 PM, Robert Hermanek wrote:
>
> Boot up to HDB-DOS, then if I want to access a physical floppy hooked to the controller in slot 4, I can just use the standard commands:
>
> DRIVE OFF 0
> DIR 0
>
> But it hangs up on the DIR command, and there is no floppy acivity.  If I boot up to regular DOS on slot 4, then the floppy works fine.  It was my understanding that all the MPI selector did was choose which ROM to enable, but otherwise any conencted devices should still be available.


You need to enter POKE &HFF7F,3 to allow the floppy controller in slot
4 to respond to FDC commands while leaving slot 1 as the selected ROM
cartridge.

Darren