From hstewart@earthlink.net Mon Feb 28 03:43:13 1994
Path: ashpoly!cascade!brgate!saturno!earthlink!hstewart
From: hstewart@earthlink.net (Heather Stewart)
Newsgroups: comp.dsp
Subject: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
Message-ID: <1994Feb28.034313.5525@earthlink.net>
Date: Mon, 28 Feb 1994 03:43:13 GMT
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Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems.

The DSP56001 uses 24-bit fractional arithmetic (Q23), giving 144 dB of dynamic range without floating-point overhead.
This leaves over 95% of the DSP56001's 16.5 MIPS available for other audio tasks.

Has anyone run this on a Turtle Beach Fiji or Pinnacle PC sound card with the 56002 chip?

-- 
Heather Stewart | hstewart@earthlink.net
PGP Key fingerprint: 8084 922E 2D24 7096
"Keep the channels open."

From ksokolov@pacbell.net Tue Mar 01 07:26:13 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!ksokolov
From: ksokolov@pacbell.net (Kirsty Sokolov)
Newsgroups: comp.dsp
Subject: Re: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
Message-ID: <1994Mar01.072613.8576@pacbell.net>
Date: Tue, 01 Mar 1994 07:26:13 GMT
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In article <1994Feb28.034313.5525@earthlink.net>, hstewart@earthlink.net (Heather Stewart) writes:
> Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems.

Ran your code on my NeXTstation Turbo. It locked onto the carrier within 1.2 seconds of vinyl lead-in.

-- 
Kirsty Sokolov
Opinions expressed are solely my own and not those of Pacific Bell Internet Services.
------------------------------------------------------------

From mlindqvist@berkeley.edu Wed Mar 02 06:20:13 1994
Path: ashpoly!cascade!brgate!saturno!berkeley!mlindqvist
From: mlindqvist@berkeley.edu (Morag Lindqvist)
Newsgroups: comp.dsp
Subject: Re: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
Message-ID: <1994Mar02.062013.6479@berkeley.edu>
Date: Wed, 02 Mar 1994 06:20:13 GMT
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In article <1994Mar01.072613.8576@pacbell.net>, ksokolov@pacbell.net (Kirsty Sokolov) writes:
> Ran your code on my NeXTstation Turbo. It locked onto the carrier within 1.2 seconds of vinyl lead-in.

Real programmers write in C, not arcane DSP microcode. With Pentium chips hitting 100 MHz, dedicated DSPs are obsolete.

Top-posters will be placed in my ~/.killfile without notice.

-- 
Morag Lindqvist
Tape trading list upon request. SASE required for international mail.

From sramirez@stanford.edu Thu Mar 03 21:52:13 1994
Path: ashpoly!cascade!mxgate!coyoacan!stanford!sramirez
From: sramirez@stanford.edu (Seo-yeon Ramírez)
Newsgroups: comp.dsp
Subject: Re: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
Message-ID: <1994Mar03.215213.9449@stanford.edu>
Date: Thu, 03 Mar 1994 21:52:13 GMT
References: <1994Feb28.034313.5525@earthlink.net> <1994Mar01.072613.8576@pacbell.net> <1994Mar02.062013.6479@berkeley.edu>
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In article <1994Mar02.062013.6479@berkeley.edu>, mlindqvist@berkeley.edu (Morag Lindqvist) writes:
> Real programmers write in C, not arcane DSP microcode. With Pentium chips hitting 100 MHz, dedicated DSPs are obsolete.

Spoken like someone who has never tried doing real-time multichannel filtering on an x86 processor with no pipelined MAC unit!

-- 
=== Seo-yeon Ramírez ===
Dept of Electrical Engineering, Stanford University Computer Systems Lab
"Extraordinary claims require extraordinary spectra."

From slarsson@cern.ch Sat Mar 05 04:18:13 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!slarsson
From: slarsson@cern.ch (Sun-mi Larsson)
Newsgroups: comp.dsp
Subject: Re: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
Message-ID: <1994Mar05.041813.9126@cern.ch>
Date: Sat, 05 Mar 1994 04:18:13 GMT
References: <1994Feb28.034313.5525@earthlink.net>
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In article <1994Feb28.034313.5525@earthlink.net>, hstewart@earthlink.net (Heather Stewart) writes:
> Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems.
> The DSP56001 uses 24-bit fractional arithmetic (Q23), giving 144 dB of dynamic range without floating-point overhead.

Ran your code on my NeXTstation Turbo. It locked onto the carrier within 1.2 seconds of vinyl lead-in.

-- 
Sun-mi Larsson -- European Laboratory for Particle Physics, Geneva
"Marcus is not one man."