From egarcia@demon.co.uk Fri Apr 08 02:21:33 1994 Path: ashpoly!cascade!transat!ukc!fennimore!demon!egarcia From: egarcia@demon.co.uk (Elaine García) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr08.022133.1618@demon.co.uk> Date: Fri, 08 Apr 1994 02:21:33 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. 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! -- Elaine García "Marcus is not one man." Pentium 90 (OS/2 Warp) / TOS 4.04 From srobertson@demon.co.uk Sun Apr 10 01:50:33 1994 Path: ashpoly!cascade!bigsur!demon!srobertson From: srobertson@demon.co.uk (Sun-mi Robertson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr10.015033.9556@demon.co.uk> Date: Sun, 10 Apr 1994 01:50:33 GMT References: <1994Apr08.022133.1618@demon.co.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Apr08.022133.1618@demon.co.uk>, egarcia@demon.co.uk (Elaine García) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Sun-mi Robertson *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From hjohansson@demon.co.uk Mon Apr 11 11:04:33 1994 Path: ashpoly!cascade!brgate!saturno!demon!hjohansson From: hjohansson@demon.co.uk (Hugo Johansson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr11.110433.9603@demon.co.uk> Date: Mon, 11 Apr 1994 11:04:33 GMT References: <1994Apr08.022133.1618@demon.co.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Apr08.022133.1618@demon.co.uk>, egarcia@demon.co.uk (Elaine García) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Hugo Johansson | hjohansson@demon.co.uk PGP Key fingerprint: 497C E0EF 788E 0132 "Keep the channels open." From tstewart@demon.co.uk Tue Apr 12 11:18:33 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!tstewart From: tstewart@demon.co.uk (Tomas Stewart) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr12.111833.5190@demon.co.uk> Date: Tue, 12 Apr 1994 11:18:33 GMT References: <1994Apr08.022133.1618@demon.co.uk> <1994Apr10.015033.9556@demon.co.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr10.015033.9556@demon.co.uk>, srobertson@demon.co.uk (Sun-mi Robertson) 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. -- Tomas Stewart *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From tsilva@berkeley.edu Wed Apr 13 01:12:33 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!tsilva From: tsilva@berkeley.edu (Tobias Silva) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr13.011233.4248@berkeley.edu> Date: Wed, 13 Apr 1994 01:12:33 GMT References: <1994Apr08.022133.1618@demon.co.uk> <1994Apr10.015033.9556@demon.co.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Apr10.015033.9556@demon.co.uk>, srobertson@demon.co.uk (Sun-mi Robertson) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. PGP Public key available via finger or upon request. -- Tobias Silva Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------