[net.micro.atari8] 850 interface hacking.

jrd@STONY-BROOK.SCRC.SYMBOLICS.COM (John R. Dunning) (08/25/86)

Has anybody out there done anything along the lines of replacing the
stock driver for the 850 interface?  What I'm after is info about what
frames one has to send to the thing to control it, and how to set up the
DCB etc to make it all happen.  The ulterior motive is that I'm looking
to invent a pseudo device that (transparently to the upper level
application) uses some file protocol (say Kermit) over a serial line to
something on the other end.  I've poked around in the supplied driver
but it's not obvious what's going on or why.  Any info, or pointers to
it will be appreciated.

jhs@mitre-bedford.ARPA (08/26/86)

The O/S manual, Atari Part Number CO16555, Section 9, has a detailed
discussion of how the Serial I/O bus works in general.  I haven't run across a
detailed manual on the 850 that describes the built-in driver.  I would be
interested if your inquiry leads you to such a manual.
-John Sangster
jhs@mitre-bedford.arpa