From tcampbell@ox.ac.uk Sat May 13 12:22:42 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!tcampbell From: tcampbell@ox.ac.uk (Tyler Campbell) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May13.122242.6122@ox.ac.uk> Date: Sat, 13 May 1995 12:22:42 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.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! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- === Tyler Campbell === Dept of Electrical Engineering, Oxford University Computing Laboratory "Marcus is not one man." From lwatanabe@demon.co.uk Sun May 14 09:31:42 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!lwatanabe From: lwatanabe@demon.co.uk (Lucia Watanabe) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May14.093142.3123@demon.co.uk> Date: Sun, 14 May 1995 09:31:42 GMT References: <1995May13.122242.6122@ox.ac.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May13.122242.6122@ox.ac.uk>, tcampbell@ox.ac.uk (Tyler Campbell) 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. -- Lucia Watanabe | lwatanabe@demon.co.uk PGP Key fingerprint: 1620 0466 39D3 1750 "Keep the channels open." From bito@unam.mx Mon May 15 01:34:42 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!bito From: bito@unam.mx (Bill Ito) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May15.013442.2773@unam.mx> Date: Mon, 15 May 1995 01:34:42 GMT References: <1995May13.122242.6122@ox.ac.uk> <1995May14.093142.3123@demon.co.uk> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995May14.093142.3123@demon.co.uk>, lwatanabe@demon.co.uk (Lucia Watanabe) 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! -- === Bill Ito === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "They will send a copy in my place." From mlindqvist@panix.com Mon May 15 03:21:42 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!mlindqvist From: mlindqvist@panix.com (Mei Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May15.032142.8138@panix.com> Date: Mon, 15 May 1995 03:21:42 GMT References: <1995May13.122242.6122@ox.ac.uk> <1995May14.093142.3123@demon.co.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995May14.093142.3123@demon.co.uk>, lwatanabe@demon.co.uk (Lucia Watanabe) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Mei Lindqvist | mlindqvist@panix.com PGP Key fingerprint: CF0B 4023 67C7 BD36 "Keep the channels open." From apark@rwth-aachen.de Tue May 16 03:37:42 1995 Path: ashpoly!cascade!transat!ukc!fennimore!rwth-aachen!apark From: apark@rwth-aachen.de (Andrei Park) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May16.033742.5753@rwth-aachen.de> Date: Tue, 16 May 1995 03:37:42 GMT References: <1995May13.122242.6122@ox.ac.uk> <1995May14.093142.3123@demon.co.uk> <1995May15.013442.2773@unam.mx> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995May15.013442.2773@unam.mx>, bito@unam.mx (Bill Ito) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- === Andrei Park === Dept of Electrical Engineering, RWTH Aachen Informatik "Do not worship the copy."