🚀 go-pugleaf

In article <1992Dec15.074916.5208@csus.edu> eps@cs.sfsu.edu writes:
>Whoa.  NeXT's serial ports wheeze at 38.4Kb.  You might have
>better luck with the DSP.  Note that Yrrid's TTYDSP product
>supposedly tops out at 128Kb, however.

A raw data stream driver for the DSP should be able to easily handle
the speeds the DSP maxes out at (~400kbit/sec async and ~3Mbit/sec sync).
TTYDSP does all the tty processing on the DSP (line mode editing even)
so we only advertise what it's been tested at, when someone needs higher
rates it'll be something to look into...

The main problem is the sound driver really, TTYDSP 1.0 uses the sound
driver to talk to the DSP, and this was a bitch to do, I wouldn't recommend
the sound driver for these types of applications at all.  1.1 talks directly
to the hardware, which is really nice and clean even tho it requires hacks
so the sound driver doesn't blow you away.  At least with the serial ports
you have things like zsacquire/release for writing custom drivers...

The DSP still has a lot of potential, the main problem (speaking from 
experience) is the sound driver.  Until NeXT puts stuff in the kernel
to legitamately write new drivers (two routines: one to allocate the DSP
hardware and one to release it) for it you're really gonna struggle
with what they give you..

<shrug>,
-- 
::   Christopher Lloyd  ::  a74k110@titan.ucc.umass.edu  ::  Yrrid, Inc.    ::