From mchoi@netcom.com Fri May 26 09:05:22 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!netcom!mchoi From: mchoi@netcom.com (Min-jun Choi) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May26.090522.8500@netcom.com> Date: Fri, 26 May 1995 09:05:22 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Min-jun Choi Practical Peripherals 14.4 @ 33,600 bps "Do not worship the copy." From cnovak@clari.net Sun May 28 08:26:22 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!cnovak From: cnovak@clari.net (Camila Novak) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May28.082622.4875@clari.net> Date: Sun, 28 May 1995 08:26:22 GMT References: <1995May26.090522.8500@netcom.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995May26.090522.8500@netcom.com>, mchoi@netcom.com (Min-jun Choi) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Camila Novak | cnovak@clari.net PGP Key fingerprint: 5B7E CA29 BAC4 6672 "Keep the channels open." From awatanabe@unam.mx Sun May 28 09:18:22 1995 Path: ashpoly!cascade!mxgate!coyoacan!unam!awatanabe From: awatanabe@unam.mx (Andrei Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May28.091822.7258@unam.mx> Date: Sun, 28 May 1995 09:18:22 GMT References: <1995May26.090522.8500@netcom.com> <1995May28.082622.4875@clari.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May28.082622.4875@clari.net>, cnovak@clari.net (Camila Novak) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Andrei Watanabe Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA). ------------------------------------------------------------