🚀 go-pugleaf

noziska@qiclab.scn.rain.com (Pat Noziska) writes:

>Does ANYONE out there sell a general-purpose DSP card for the PC/AT bus?
>By general-purpose, I mean: 
>
>	1. Has an Open architecture (i.e. one which will allow me to 
>		write ANY kind of DSP code I want and make it work on the board)
>	2. Not originally designed for a specific purpose (such as voice or fax)
>	3. Has an RJ-xx interface (which sorta violates my second criterion,
>	but it's what I would prefer). Telephony interface is a plus.

I'd also like to find such a board, but I don't need the RJ-xx interface.

Nice features I'd like to see:

    1.  A/D and D/A on board (plug in option is ok).
    2.  A/D and D/A that go up to 16 bits and 44.1 kHz would be nice
        but I don't need it for all purposes.
    3.  Buffered A/D and D/A so I don't have to code the pace.
    4.  2 each of A/D and D/A (stereo, other effects, etc.)
    5.  If RJ-xx interface, voltage level, ring detect and such would
        also be nice, but that sounds like a telephone line interface

>I'm hoping I can find a prefab, plug-and-program board, but if no such board
>exists, I will entertain comments on the merits of, and recommendations of,
>the available  DSP board prototyping and development kits out there for the
>AT bus.

On the one extreme, there are lots of experimenters out there to which some
of the electronics industry caters.  On the other extreme most people just
want everything to be turnkey.  THERE IS A MIDDLE point which is not being
very well addressed: people who do NOT want to mess with the hardware too
much, but *DO* want to do the software experimenting to the extreme detail.
Too often "just the right hardware" comes without any ability to program
it at all, because the vendor provides "all you would ever need", which
almost always turns out to be junk.

Sorry, I'll get off my soapbox now :-)
-- 
/***********************************************************************\
| Phil Howard  ---  KA9WGN  ---  pdh@netcom.com   |   "The problem with |
| depending on government is that you cannot depend on it" - Tony Brown |
\***********************************************************************/

Loughborough Sound Images Ltd
The Technology Centre
Epinal Way
Loughborough
Leicestershire LE11 0QE
England

tel + 44 509 231843
fax +44 509 262433


They provide a range of DSP boards that fit inside the IBM expansion slot.
The one I use based on the TMS320c25 with 1 channel 16 bit ADC and DAC.
It is really old hat technology now.  The rest of the group use the AT&T
DSP32, with dual channel 16 bit ADC and DACs.  Both boards are supported
by hyperception's hypersignal software.

Note because of noise the ADC's are only rated at 12 bits and 14 bits d
dynamic range.

We program the boards in assembly language but I believe cross compliers
are available (for a price).

The catch is the boards are quite expensive, my TMS cost 1300 pounds, while
the DSP32 cost about 2000 pounds (without the Debugger).  Considering
a pound to dollar conversion rate of 1.90, plus your Value Added Tax
makes them very expensive.


note the boards have the usual external ram, interrupt timers, (and some-
times dma).

The guy next door has justed prototyped his own DSP32 development card
with dual channel sigma delta converters.  He claims a dynamic range
of 15.5 bits from his 16bit converters.  Also the sigma delta have an
internal aliasing filter at half the sampling rate.  His timer is also
a programable interger of 1 Hz (70 - 50k) I think. And uses zero wait
state (20ns) sram upto 256 k external.  He says its a better board and
is trying to get a supplier to stock it.



anyway the IEEE spectrum is full of advertisements for dsp boards.  ie the
Tiger boards ...


Kamlesh Masrani

direct email - kam@uk.ac.hull.ee.comms.

In article <_4dmzlb.pdh@netcom.com>, pdh@netcom.com (Phil Howard ) writes:
  noziska@qiclab.scn.rain.com (Pat Noziska) writes:
  
  >Does ANYONE out there sell a general-purpose DSP card for the PC/AT bus?
  >By general-purpose, I mean: 
  >
  >	1. Has an Open architecture (i.e. one which will allow me to 
  >		write ANY kind of DSP code I want and make it work on the board)
  >	2. Not originally designed for a specific purpose (such as voice or fax)
  >	3. Has an RJ-xx interface (which sorta violates my second criterion,
  >	but it's what I would prefer). Telephony interface is a plus.
  
  I'd also like to find such a board, but I don't need the RJ-xx interface.
  
  Nice features I'd like to see:
  
      1.  A/D and D/A on board (plug in option is ok).
      2.  A/D and D/A that go up to 16 bits and 44.1 kHz would be nice
          but I don't need it for all purposes.
      3.  Buffered A/D and D/A so I don't have to code the pace.
      4.  2 each of A/D and D/A (stereo, other effects, etc.)
      5.  If RJ-xx interface, voltage level, ring detect and such would
          also be nice, but that sounds like a telephone line interface

There's a neat general purpose TMS320C31 DSP board made by ASPI, called
the Elf-31. The hardware is $1000, TI software development software is
extra. It has:

	33MHz C31
	128k x 32 fast DRAM
	stereo 16 bit A/D and D/A, up to 48kHz sampling rate
	stereo 1/8" in/out sockets
	RJ-11 telephone interface
	MIDI/serial interface
	16 bit AT 2/3 card
	daughter board socket

ASPI's address is:

	Atlanta Signal Processors. Inc.
	770 Spring St
	Atlanta, GA 30308
	USA
	phone: (404) 892-7265
	fax: (404) 892-2512

Not an ad, just a word from a satisfied customer...
-- 
Jon Rowlands			email: rowlands@csc.ti.com
Texas Instruments		phone: 1-214-995-3436
SPDC, DSP Technology Branch	  fax: 1-214-995-0304
Dallas, Texas, USA

You might also check out Ariel Corp, which makes a variety of PC bus
(and other) DSP boards:

	Ariel Corp.
	433 River Rd.
	Highland Park, NJ 08904
	(908) 249-2900
	email: ariel@ariel.com

Phil Lapsley		phil@ohm.Berkeley.EDU		...!ucbvax!ohm!phil