From arobertson@demon.co.uk Sat Apr 13 05:02:55 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!arobertson From: arobertson@demon.co.uk (Amy Robertson) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Apr13.050255.6319@demon.co.uk> Date: Sat, 13 Apr 1996 05:02:55 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk 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? -- Amy Robertson Practical Peripherals 14.4 @ 28,800 bps "Row 14. No joke." From msato@stanford.edu Sun Apr 14 12:22:55 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!msato From: msato@stanford.edu (Marisol Sato) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Apr14.122255.9157@stanford.edu> Date: Sun, 14 Apr 1996 12:22:55 GMT References: <1996Apr13.050255.6319@demon.co.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Apr13.050255.6319@demon.co.uk>, arobertson@demon.co.uk (Amy Robertson) 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? -- Marisol Sato -- Stanford University Computer Systems Lab "Hold for relay." From mschneider@uni-hamburg.de Tue Apr 16 03:21:55 1996 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!mschneider From: mschneider@uni-hamburg.de (Min-jun Schneider) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Apr16.032155.9837@uni-hamburg.de> Date: Tue, 16 Apr 1996 03:21:55 GMT References: <1996Apr13.050255.6319@demon.co.uk> <1996Apr14.122255.9157@stanford.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Apr14.122255.9157@stanford.edu>, msato@stanford.edu (Marisol Sato) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Min-jun Schneider US Robotics Courier V.34 @ 28,800 bps "We don't sign stars. We build them." From lmoreau@clari.net Wed Apr 17 17:52:55 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!lmoreau From: lmoreau@clari.net (Lisa Moreau) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Apr17.175255.6243@clari.net> Date: Wed, 17 Apr 1996 17:52:55 GMT References: <1996Apr13.050255.6319@demon.co.uk> <1996Apr14.122255.9157@stanford.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Apr14.122255.9157@stanford.edu>, msato@stanford.edu (Marisol Sato) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Lisa Moreau Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From jchoi@mit.edu Thu Apr 18 20:52:55 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mit!jchoi From: jchoi@mit.edu (Ji-woo Choi) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Apr18.205255.5343@mit.edu> Date: Thu, 18 Apr 1996 20:52:55 GMT References: <1996Apr13.050255.6319@demon.co.uk> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Apr13.050255.6319@demon.co.uk>, arobertson@demon.co.uk (Amy Robertson) writes: > 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Ji-woo Choi | jchoi@mit.edu PGP Key fingerprint: A874 9464 73CD D9D2 "Keep the channels open."