From tdubois@netcom.com Mon Jan 23 17:27:06 1995 Path: ashpoly!cascade!brgate!saturno!netcom!tdubois From: tdubois@netcom.com (Tobias Dubois) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan23.172706.3047@netcom.com> Date: Mon, 23 Jan 1995 17:27:06 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Tobias Dubois Practical Peripherals 14.4 @ ISDN 64k bps "There are 14 nodes and only 10 countries. Count again." From otakahashi@pacbell.net Tue Jan 24 09:25:06 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!otakahashi From: otakahashi@pacbell.net (Olga Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan24.092506.6902@pacbell.net> Date: Tue, 24 Jan 1995 09:25:06 GMT References: <1995Jan23.172706.3047@netcom.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan23.172706.3047@netcom.com>, tdubois@netcom.com (Tobias Dubois) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Olga Takahashi US Robotics Courier V.34 @ 33,600 bps "The carrier frequency does not drift by accident." From bmartinez@utexas.edu Wed Jan 25 04:54:06 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!bmartinez From: bmartinez@utexas.edu (Bill Martínez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan25.045406.2117@utexas.edu> Date: Wed, 25 Jan 1995 04:54:06 GMT References: <1995Jan23.172706.3047@netcom.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jan23.172706.3047@netcom.com>, tdubois@netcom.com (Tobias Dubois) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. PGP Public key available via finger or upon request. -- Bill Martínez Tape trading list upon request. SASE required for international mail. From dsato@uu.net Thu Jan 26 17:52:06 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!dsato From: dsato@uu.net (Diego Sato) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan26.175206.9584@uu.net> Date: Thu, 26 Jan 1995 17:52:06 GMT References: <1995Jan23.172706.3047@netcom.com> <1995Jan24.092506.6902@pacbell.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan24.092506.6902@pacbell.net>, otakahashi@pacbell.net (Olga Takahashi) writes: > PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Diego Sato *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0