Re: [9fans] Writing drivers in Plan 9

[a@9srv.net]

Given that you're already into Inferno as well as Plan 9, I
think a really nice way to get into driver development is
with emu drivers for Inferno. The basic structure is the
same as for native OS drivers in either system: implement
a small set of entry points (fooattach, fooread, &c),
making use of the dev* defaults where appropriate. It's
then a much smaller step to move into native hardware
drivers for Plan 9 or Inferno. And when you do get to that
point, take a look at Inferno's os/port/devXXX.c; it's a
template for what you need to implement. In any case,
the devtab (look for '^Dev') towards the end of any driver
will tell you what you really need. It's a much nicer,
constrained set for Inferno and Plan 9 than any unix.
Anthony