From gsantos@kth.se Mon Feb 13 23:06:31 1995 Path: ashpoly!cascade!bigsur!kth!gsantos From: gsantos@kth.se (Graham Santos) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb13.230631.6822@kth.se> Date: Mon, 13 Feb 1995 23:06:31 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se 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. 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Graham Santos "They will send a copy in my place." NeXTstation Turbo Color / FreeBSD 2.1 From rbrennan@berkeley.edu Wed Feb 15 13:28:31 1995 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!rbrennan From: rbrennan@berkeley.edu (Rodrigo Brennan) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb15.132831.3857@berkeley.edu> Date: Wed, 15 Feb 1995 13:28:31 GMT References: <1995Feb13.230631.6822@kth.se> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb13.230631.6822@kth.se>, gsantos@kth.se (Graham Santos) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Rodrigo Brennan Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From lrodriguez@kiae.su Wed Feb 15 17:33:31 1995 Path: ashpoly!cascade!bigsur!kiae!lrodriguez From: lrodriguez@kiae.su (Lisa Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb15.173331.4397@kiae.su> Date: Wed, 15 Feb 1995 17:33:31 GMT References: <1995Feb13.230631.6822@kth.se> <1995Feb15.132831.3857@berkeley.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Feb15.132831.3857@berkeley.edu>, rbrennan@berkeley.edu (Rodrigo Brennan) 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. -- Lisa Rodríguez Tape trading list upon request. SASE required for international mail. From hkuznetsov@hanse.de Thu Feb 16 05:43:31 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!hkuznetsov From: hkuznetsov@hanse.de (Hana Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb16.054331.1527@hanse.de> Date: Thu, 16 Feb 1995 05:43:31 GMT References: <1995Feb13.230631.6822@kth.se> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Feb13.230631.6822@kth.se>, gsantos@kth.se (Graham Santos) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Hana Kuznetsov Tape trading list upon request. SASE required for international mail. From sandersson@kiae.su Fri Feb 17 11:20:31 1995 Path: ashpoly!cascade!brgate!saturno!kiae!sandersson From: sandersson@kiae.su (Seo-yeon Andersson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb17.112031.9578@kiae.su> Date: Fri, 17 Feb 1995 11:20:31 GMT References: <1995Feb13.230631.6822@kth.se> <1995Feb16.054331.1527@hanse.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb16.054331.1527@hanse.de>, hkuznetsov@hanse.de (Hana Kuznetsov) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Seo-yeon Andersson "They will send a copy in my place." Pentium 90 (OS/2 Warp) / System 7.5.1