Folks,

        I just put in the ALPHA IN2000 SCSI driver into my Linux 0.99
pl12 kernel and I have a problem with interrupt request assignment.
According to the IN2000 documentation, I should set up the card for
no-interrupt if I wanted to use MSDOS 5.0+ for multiple (more than 2)
disk drives.  The IN2000 driver expects an interrupt to be assigned to
the card for use in Linux.  Since it is desirable to be able to access my
SCSI drive either from MSDOS or from Linux, I am at a loss.  I certainly
don't want to have to open up box to flip the DIP switch every time I
switch between MSDOS and Linux.

        Is this a problem altogether with SCSI drivers, in that MSDOS 5.0
requires the controllers for additional disk drives not to use
interrupts, whereas UNIX systems do want them to have separate
interrupts?  Does MSDOS (or BIOS SCSI drivers) use some kind of
timer-based polling mechanisms in its support for 2+ disk drives?  Is
there some kind of solution that would accomodate both mechanisms without
me having to open up the box to flip the switch?  Obviously, other SCSI
controllers may have software-programmable interrupt assignment so that
this manual switch may not be needed.  However, I am using the IN2000...

        All responses are appreciated.


                                                Peter Lu