From sokonkwo@purdue.edu Sun Apr 02 22:30:50 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!sokonkwo From: sokonkwo@purdue.edu (Sven Okonkwo) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr02.223050.4903@purdue.edu> Date: Sun, 02 Apr 1995 22:30:50 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu 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. 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Sven Okonkwo *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From loliveira@uni-hamburg.de Tue Apr 04 06:17:50 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!loliveira From: loliveira@uni-hamburg.de (Lucia Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr04.061750.3902@uni-hamburg.de> Date: Tue, 04 Apr 1995 06:17:50 GMT References: <1995Apr02.223050.4903@purdue.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Apr02.223050.4903@purdue.edu>, sokonkwo@purdue.edu (Sven Okonkwo) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Lucia Oliveira Tape trading list upon request. SASE required for international mail.