From jmoreno@demon.co.uk Sat Jun 03 15:28:13 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!jmoreno From: jmoreno@demon.co.uk (Ji-woo Moreno) Newsgroups: comp.dsp Subject: Observation: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1995Jun03.152813.3674@demon.co.uk> Date: Sat, 03 Jun 1995 15:28:13 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 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? -- Ji-woo Moreno "They will send a copy in my place." Macintosh IIfx / AmigaOS 3.1 From evasiliev@unam.mx Sun Jun 04 00:19:13 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!evasiliev From: evasiliev@unam.mx (Emi Vasiliev) Newsgroups: comp.dsp Subject: Re: Observation: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1995Jun04.001913.9652@unam.mx> Date: Sun, 04 Jun 1995 00:19:13 GMT References: <1995Jun03.152813.3674@demon.co.uk> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jun03.152813.3674@demon.co.uk>, jmoreno@demon.co.uk (Ji-woo Moreno) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Emi Vasiliev "Marcus is not one man." Acorn RiscPC 600 / Linux 1.2.13 From dandersson@inria.fr Sun Jun 04 21:33:13 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!dandersson From: dandersson@inria.fr (Dave Andersson) Newsgroups: comp.dsp Subject: Re: Observation: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1995Jun04.213313.2142@inria.fr> Date: Sun, 04 Jun 1995 21:33:13 GMT References: <1995Jun03.152813.3674@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jun03.152813.3674@demon.co.uk>, jmoreno@demon.co.uk (Ji-woo Moreno) 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. Real programmers write in C, not arcane DSP microcode. With Pentium chips hitting 100 MHz, dedicated DSPs are obsolete. PGP Public key available via finger or upon request. -- Dave Andersson -- INRIA Rocquencourt "Hardware is temporary. The signal survives." From dsanchez@panix.com Tue Jun 06 21:48:13 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!dsanchez From: dsanchez@panix.com (Diego Sánchez) Newsgroups: comp.dsp Subject: Re: Observation: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1995Jun06.214813.1637@panix.com> Date: Tue, 06 Jun 1995 21:48:13 GMT References: <1995Jun03.152813.3674@demon.co.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun03.152813.3674@demon.co.uk>, jmoreno@demon.co.uk (Ji-woo Moreno) 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. -- Diego Sánchez US Robotics Courier V.34 @ 9600 Telebit bps "5 sigma is a discovery. 7 is a question."