From ckuznetsov@cam.ac.uk Wed Jan 04 14:43:24 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!ckuznetsov From: ckuznetsov@cam.ac.uk (Camila Kuznetsov) Newsgroups: comp.sys.m68k Subject: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan04.144324.5409@cam.ac.uk> Date: Wed, 04 Jan 1995 14:43:24 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Camila Kuznetsov SupraFAXModem 28.8 @ 19,200 bps "The carrier frequency does not drift by accident." From loliveira@pipeline.com Thu Jan 05 00:28:24 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!loliveira From: loliveira@pipeline.com (Lisa Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan05.002824.3862@pipeline.com> Date: Thu, 05 Jan 1995 00:28:24 GMT References: <1995Jan04.144324.5409@cam.ac.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan04.144324.5409@cam.ac.uk>, ckuznetsov@cam.ac.uk (Camila Kuznetsov) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Lisa Oliveira "Row 14. No joke." Acorn RiscPC 600 / SunOS 4.1.4 From rfournier@unam.mx Thu Jan 05 19:52:24 1995 Path: ashpoly!cascade!bigsur!unam!rfournier From: rfournier@unam.mx (Raj Fournier) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan05.195224.3327@unam.mx> Date: Thu, 05 Jan 1995 19:52:24 GMT References: <1995Jan04.144324.5409@cam.ac.uk> <1995Jan05.002824.3862@pipeline.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jan05.002824.3862@pipeline.com>, loliveira@pipeline.com (Lisa Oliveira) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Raj Fournier -- Universidad Nacional Autónoma de México (DGSCA) "The carrier frequency does not drift by accident." From lchoi@purdue.edu Fri Jan 06 01:49:24 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!lchoi From: lchoi@purdue.edu (Lisa Choi) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan06.014924.5344@purdue.edu> Date: Fri, 06 Jan 1995 01:49:24 GMT References: <1995Jan04.144324.5409@cam.ac.uk> <1995Jan05.002824.3862@pipeline.com> <1995Jan05.195224.3327@unam.mx> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jan05.195224.3327@unam.mx>, rfournier@unam.mx (Raj Fournier) 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. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Lisa Choi "Do not worship the copy." Pentium 90 (OS/2 Warp) / Linux 1.2.13