From tpopov@uu.net Sat Nov 26 22:41:42 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!tpopov From: tpopov@uu.net (Takeshi Popov) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov26.224142.7014@uu.net> Date: Sat, 26 Nov 1994 22:41:42 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 11 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! I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- === Takeshi Popov === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Hold for relay." From bmoreau@cam.ac.uk Sun Nov 27 02:43:42 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!bmoreau From: bmoreau@cam.ac.uk (Bastien Moreau) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov27.024342.5416@cam.ac.uk> Date: Sun, 27 Nov 1994 02:43:42 GMT References: <1994Nov26.224142.7014@uu.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Nov26.224142.7014@uu.net>, tpopov@uu.net (Takeshi Popov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Bastien Moreau *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From mgirard@u-tokyo.ac.jp Mon Nov 28 06:26:42 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!mgirard From: mgirard@u-tokyo.ac.jp (Mike Girard) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov28.062642.7132@u-tokyo.ac.jp> Date: Mon, 28 Nov 1994 06:26:42 GMT References: <1994Nov26.224142.7014@uu.net> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Nov26.224142.7014@uu.net>, tpopov@uu.net (Takeshi Popov) 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. -- Mike Girard Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------