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From: ray@nmtsun.nmt.edu (Ray Piworunas)
Newsgroups: comp.sys.dec.micro
Subject: BIOS calls for Rainbow, for DS floppy driver.
Keywords: BIOS MS-DOS Interrupts TEAC
Message-ID: <3670@nmtsun.nmt.edu>
Date: 19 Dec 89 18:02:06 GMT
Organization: New Mexico Tech, Socorro NM
Lines: 34


I'm wondering if anyone has a list of BIOS calls for the Rainbow under
MS-DOS.  I am going to try to write a device driver to handle TEAC
FD-55F floppy drives (double-sided, 96-TPI -- replacements for an RX50).
Having access to the BIOS should make some parts of the process easier.
Otherwise I'll probably need to duplicate the functionality of some of
the BIOS routines, and that seems inefficient.  If I get this device
driver going (no telling when, several months at best I suspect, since
I've never tried anything of this nature before) I would probably write
an article on it so that others could use it.  It seems easier to install
a device driver in CONFIG.SYS than to rewrite the BIOS.

If anyone has a list of the MS-DOS interrupts for the Rainbow I would
appreciate getting a copy of it.  I know some of the Rainbow's interrupts
are different than the IBM's, but I don't know which ones.  I also
suspect all of the interrupts that are documented (unoffically and
offically) for the IBM won't work on the Rainbow since the BIOS is
different.

I'd like to spend time working on the device driver and not have to
sort out the BIOS calls, and MS-DOS interrupts on my own (I would think
there are at least several partial lists of each out there somewhere).
I will post what I find out about the Rainbow BIOS calls, and MS-DOS
interrupts.

If you have any words of warning about writing, or features that should
go into, a device driver for handling floppy drives I'd be glad to hear
from you.  Any help will be appreciated.

Please respond by email as I'm not sure that this group comes through
all the time.

Thanks for your help,
  Ray Piworunas -- ray@nmt.edu