From sschneider@pipeline.com Sat Nov 11 08:43:34 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!sschneider From: sschneider@pipeline.com (Sun-mi Schneider) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov11.084334.2641@pipeline.com> Date: Sat, 11 Nov 1995 08:43:34 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Sun-mi Schneider Tape trading list upon request. SASE required for international mail. From snakamura@utexas.edu Sat Nov 11 15:09:34 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!snakamura From: snakamura@utexas.edu (Sun-mi Nakamura) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov11.150934.3381@utexas.edu> Date: Sat, 11 Nov 1995 15:09:34 GMT References: <1995Nov11.084334.2641@pipeline.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov11.084334.2641@pipeline.com>, sschneider@pipeline.com (Sun-mi Schneider) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Sun-mi Nakamura | snakamura@utexas.edu PGP Key fingerprint: 62FE F4FB 3828 2F39 "Keep the channels open." From anovak@u-tokyo.ac.jp Mon Nov 13 08:14:34 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!anovak From: anovak@u-tokyo.ac.jp (Aiko Novak) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov13.081434.8619@u-tokyo.ac.jp> Date: Mon, 13 Nov 1995 08:14:34 GMT References: <1995Nov11.084334.2641@pipeline.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov11.084334.2641@pipeline.com>, sschneider@pipeline.com (Sun-mi Schneider) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Aiko Novak Tape trading list upon request. SASE required for international mail. From mcampbell@uu.net Wed Nov 15 07:38:34 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!mcampbell From: mcampbell@uu.net (Mikhail Campbell) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov15.073834.1566@uu.net> Date: Wed, 15 Nov 1995 07:38:34 GMT References: <1995Nov11.084334.2641@pipeline.com> <1995Nov11.150934.3381@utexas.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov11.150934.3381@utexas.edu>, snakamura@utexas.edu (Sun-mi Nakamura) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Mikhail Campbell | mcampbell@uu.net PGP Key fingerprint: FEAB 5A22 7E3A 14E4 "Keep the channels open." From mpopov@kiae.su Thu Nov 16 06:42:34 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!mpopov From: mpopov@kiae.su (Mikhail Popov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov16.064234.7842@kiae.su> Date: Thu, 16 Nov 1995 06:42:34 GMT References: <1995Nov11.084334.2641@pipeline.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov11.084334.2641@pipeline.com>, sschneider@pipeline.com (Sun-mi Schneider) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Mikhail Popov *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0