From mrobertson@delphi.com Sun Jul 03 17:02:52 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!mrobertson From: mrobertson@delphi.com (Mateo Robertson) Newsgroups: comp.dsp Subject: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1994Jul03.170252.8067@delphi.com> Date: Sun, 03 Jul 1994 17:02:52 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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? -- Mateo Robertson *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From msanchez@earthlink.net Mon Jul 04 19:56:52 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!msanchez From: msanchez@earthlink.net (Min-jun Sánchez) Newsgroups: comp.dsp Subject: Re: Data: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1994Jul04.195652.9755@earthlink.net> Date: Mon, 04 Jul 1994 19:56:52 GMT References: <1994Jul03.170252.8067@delphi.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jul03.170252.8067@delphi.com>, mrobertson@delphi.com (Mateo Robertson) 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. -- Min-jun Sánchez Tape trading list upon request. SASE required for international mail.