Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ukma!gatech!rutgers!bpa!cbmvax!grr
From: grr@cbmvax.UUCP (George Robbins)
Newsgroups: comp.arch
Subject: Re: DSP56001 query
Message-ID: <7151@cbmvax.UUCP>
Date: 28 Jun 89 07:59:12 GMT
References: <8765@chinet.chi.il.us>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Distribution: usa
Organization: Commodore Technology, West Chester, PA
Lines: 26

In article <8765@chinet.chi.il.us> edlee@chinet.chi.il.us (Edward Lee) writes:
> 
> I saved the following message from Fidonet or Internet last year.  Is there
> any truth to the second paragraph about the Motorola DSP56001 being capable
> of acting as a V.32 modem at the price Eric Larson mentions?

Perhaps,, however a DSP chip is not a modem, just a piece that handles
the signal processing side.  You also need d/a-a/d stuff and a "network
interface" to cope with phone line nasties.  Casework, power supplies,
and *yes* RAM, fast RAM to make the dsp work.  You may also need/want a
normal micro-processor of some sort to handle bits and hayes type command
sequences, which may need it's own ram/rom.  Some EEPROM/EAROM has become
standard for storeing setup...  and so on.

Telebit does it's "analog" processing largely with a TI DSP, however the
cheapest implemementation, the T1000 lists for well over $500...

The current Rockwell V.32 modem chipset seems to have 5 custom chips,
presumably to process a normal synchronous data stream - turning it
into a hayes compatible Async modem would seem to require a microprocessor
plus some unknown amount of Analog preprocessing/line interface, etc...

-- 
George Robbins - now working for,	uucp: {uunet|pyramid|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@uunet.uu.net
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)