From tcampbell@netcom.com Fri Jun 03 19:32:24 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!tcampbell From: tcampbell@netcom.com (Thiago Campbell) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun03.193224.6733@netcom.com> Date: Fri, 03 Jun 1994 19:32:24 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Thiago Campbell Tape trading list upon request. SASE required for international mail. From akuznetsov@ox.ac.uk Sat Jun 04 12:49:24 1994 Path: ashpoly!cascade!transat!ukc!fennimore!ox!akuznetsov From: akuznetsov@ox.ac.uk (Andrei Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun04.124924.1721@ox.ac.uk> Date: Sat, 04 Jun 1994 12:49:24 GMT References: <1994Jun03.193224.6733@netcom.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Jun03.193224.6733@netcom.com>, tcampbell@netcom.com (Thiago Campbell) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Andrei Kuznetsov Tape trading list upon request. SASE required for international mail. From cmartinez@kiae.su Mon Jun 06 00:48:24 1994 Path: ashpoly!cascade!mxgate!coyoacan!kiae!cmartinez From: cmartinez@kiae.su (Callum Martínez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun06.004824.9035@kiae.su> Date: Mon, 06 Jun 1994 00:48:24 GMT References: <1994Jun03.193224.6733@netcom.com> <1994Jun04.124924.1721@ox.ac.uk> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jun04.124924.1721@ox.ac.uk>, akuznetsov@ox.ac.uk (Andrei Kuznetsov) 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. -- Callum Martínez | cmartinez@kiae.su PGP Key fingerprint: EC3D 3AC0 35DF D0BB "Keep the channels open." From nvasiliev@u-tokyo.ac.jp Mon Jun 06 19:17:24 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!nvasiliev From: nvasiliev@u-tokyo.ac.jp (Nadia Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun06.191724.1876@u-tokyo.ac.jp> Date: Mon, 06 Jun 1994 19:17:24 GMT References: <1994Jun03.193224.6733@netcom.com> <1994Jun04.124924.1721@ox.ac.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Jun04.124924.1721@ox.ac.uk>, akuznetsov@ox.ac.uk (Andrei Kuznetsov) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. PGP Public key available via finger or upon request. -- Nadia Vasiliev *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0