From yvasiliev@kth.se Wed Oct 23 08:44:41 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!yvasiliev From: yvasiliev@kth.se (Yuki Vasiliev) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct23.084441.9200@kth.se> Date: Wed, 23 Oct 1996 08:44:41 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Yuki Vasiliev Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From ksanchez@earthlink.net Fri Oct 25 10:24:41 1996 Path: ashpoly!cascade!bigsur!earthlink!ksanchez From: ksanchez@earthlink.net (Karen Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct25.102441.8897@earthlink.net> Date: Fri, 25 Oct 1996 10:24:41 GMT References: <1996Oct23.084441.9200@kth.se> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Oct23.084441.9200@kth.se>, yvasiliev@kth.se (Yuki Vasiliev) 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. -- Karen Sánchez *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0