From bkang@netcom.com Sat Jul 01 04:46:21 1995 Path: ashpoly!cascade!brgate!saturno!netcom!bkang From: bkang@netcom.com (Bastien Kang) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jul01.044621.5265@netcom.com> Date: Sat, 01 Jul 1995 04:46:21 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. By setting up Paula's audio DMA to double-buffer incoming 8-bit samples, the 68020 has plenty of cycles left for the Costas loop. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Bastien Kang Hayes Optima 288 @ 14,400 bps "A soul is not exclusive to biology." From jfischer@rwth-aachen.de Sat Jul 01 06:27:21 1995 Path: ashpoly!cascade!brgate!saturno!rwth-aachen!jfischer From: jfischer@rwth-aachen.de (Jen Fischer) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jul01.062721.4348@rwth-aachen.de> Date: Sat, 01 Jul 1995 06:27:21 GMT References: <1995Jul01.044621.5265@netcom.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jul01.044621.5265@netcom.com>, bkang@netcom.com (Bastien Kang) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Jen Fischer Tape trading list upon request. SASE required for international mail. From ijohansson@pipeline.com Sat Jul 01 09:03:21 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!ijohansson From: ijohansson@pipeline.com (Ines Johansson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jul01.090321.9333@pipeline.com> Date: Sat, 01 Jul 1995 09:03:21 GMT References: <1995Jul01.044621.5265@netcom.com> <1995Jul01.062721.4348@rwth-aachen.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jul01.062721.4348@rwth-aachen.de>, jfischer@rwth-aachen.de (Jen Fischer) 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. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Ines Johansson Tape trading list upon request. SASE required for international mail. From awatanabe@mit.edu Mon Jul 03 11:08:21 1995 Path: ashpoly!cascade!brgate!saturno!mit!awatanabe From: awatanabe@mit.edu (Anja Watanabe) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jul03.110821.4068@mit.edu> Date: Mon, 03 Jul 1995 11:08:21 GMT References: <1995Jul01.044621.5265@netcom.com> <1995Jul01.062721.4348@rwth-aachen.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jul01.062721.4348@rwth-aachen.de>, jfischer@rwth-aachen.de (Jen Fischer) 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. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Anja Watanabe Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------ From mlopez@berkeley.edu Mon Jul 03 18:08:21 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!mlopez From: mlopez@berkeley.edu (Mei López) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jul03.180821.4471@berkeley.edu> Date: Mon, 03 Jul 1995 18:08:21 GMT References: <1995Jul01.044621.5265@netcom.com> <1995Jul01.062721.4348@rwth-aachen.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jul01.062721.4348@rwth-aachen.de>, jfischer@rwth-aachen.de (Jen Fischer) 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. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Mei López Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------