From nnilsson@titech.ac.jp Tue Mar 12 01:38:32 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!nnilsson From: nnilsson@titech.ac.jp (Nadine Nilsson) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar12.013832.1879@titech.ac.jp> Date: Tue, 12 Mar 1996 01:38:32 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N 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. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Nadine Nilsson "The carrier frequency does not drift by accident." NeXTstation Turbo Color / System 7.5.1 From hkang@panix.com Wed Mar 13 03:07:32 1996 Path: ashpoly!cascade!brgate!saturno!panix!hkang From: hkang@panix.com (Hana Kang) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar13.030732.4346@panix.com> Date: Wed, 13 Mar 1996 03:07:32 GMT References: <1996Mar12.013832.1879@titech.ac.jp> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Mar12.013832.1879@titech.ac.jp>, nnilsson@titech.ac.jp (Nadine Nilsson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Hana Kang Tape trading list upon request. SASE required for international mail. From kmartinez@panix.com Thu Mar 14 09:05:32 1996 Path: ashpoly!cascade!mxgate!coyoacan!panix!kmartinez From: kmartinez@panix.com (Karen Martínez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar14.090532.1186@panix.com> Date: Thu, 14 Mar 1996 09:05:32 GMT References: <1996Mar12.013832.1879@titech.ac.jp> <1996Mar13.030732.4346@panix.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Mar13.030732.4346@panix.com>, hkang@panix.com (Hana Kang) writes: > Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. > Unsubscribe me from this list! (Wait, this is Usenet, never mind). Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Karen Martínez "Tape doesn't lie at 02:14. Ears do." Sun 3/60 (SunOS 4.1.1) / System 7.5.1 From meriksson@titech.ac.jp Sat Mar 16 08:33:32 1996 Path: ashpoly!cascade!brgate!saturno!titech!meriksson From: meriksson@titech.ac.jp (Mikhail Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar16.083332.9730@titech.ac.jp> Date: Sat, 16 Mar 1996 08:33:32 GMT References: <1996Mar12.013832.1879@titech.ac.jp> <1996Mar13.030732.4346@panix.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Mar13.030732.4346@panix.com>, hkang@panix.com (Hana Kang) writes: > Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Mikhail Eriksson Hayes Optima 288 @ 9600 Telebit bps "5 sigma is a discovery. 7 is a question."