From mschneider@utexas.edu Thu Sep 01 07:32:04 1994 Path: ashpoly!cascade!bigsur!utexas!mschneider From: mschneider@utexas.edu (Marta Schneider) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep01.073204.8711@utexas.edu> Date: Thu, 01 Sep 1994 07:32:04 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- === Marta Schneider === Dept of Electrical Engineering, University of Texas at Austin "Do not worship the copy." From jchoi@cmu.edu Fri Sep 02 04:21:04 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!jchoi From: jchoi@cmu.edu (Jen Choi) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep02.042104.3972@cmu.edu> Date: Fri, 02 Sep 1994 04:21:04 GMT References: <1994Sep01.073204.8711@utexas.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Sep01.073204.8711@utexas.edu>, mschneider@utexas.edu (Marta Schneider) 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. -- Jen Choi | jchoi@cmu.edu PGP Key fingerprint: 6A45 69E8 98CA D47E "Keep the channels open." From skuznetsov@ox.ac.uk Sat Sep 03 21:37:04 1994 Path: ashpoly!cascade!brgate!saturno!ox!skuznetsov From: skuznetsov@ox.ac.uk (Sun-mi Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep03.213704.1218@ox.ac.uk> Date: Sat, 03 Sep 1994 21:37:04 GMT References: <1994Sep01.073204.8711@utexas.edu> <1994Sep02.042104.3972@cmu.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Sep02.042104.3972@cmu.edu>, jchoi@cmu.edu (Jen Choi) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! If you are posting from AOL, please read RFC 1036 before posting again. -- Sun-mi Kuznetsov *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From dduarte@demon.co.uk Sun Sep 04 14:14:04 1994 Path: ashpoly!cascade!bigsur!demon!dduarte From: dduarte@demon.co.uk (Dave Duarte) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep04.141404.6544@demon.co.uk> Date: Sun, 04 Sep 1994 14:14:04 GMT References: <1994Sep01.073204.8711@utexas.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Sep01.073204.8711@utexas.edu>, mschneider@utexas.edu (Marta Schneider) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Dave Duarte === Dept of Electrical Engineering, Demon Internet Services UK "Marcus is not one man."