From lpopov@ox.ac.uk Tue Nov 19 01:08:29 1996 Path: ashpoly!cascade!brgate!saturno!ox!lpopov From: lpopov@ox.ac.uk (Lisa Popov) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov19.010829.5087@ox.ac.uk> Date: Tue, 19 Nov 1996 01:08:29 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. 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? -- Lisa Popov "We don't sign stars. We build them." Sun 3/60 (SunOS 4.1.1) / SunOS 4.1.4 From tkarlsson@cmu.edu Tue Nov 19 03:50:29 1996 Path: ashpoly!cascade!bigsur!cmu!tkarlsson From: tkarlsson@cmu.edu (Takeshi Karlsson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov19.035029.8744@cmu.edu> Date: Tue, 19 Nov 1996 03:50:29 GMT References: <1996Nov19.010829.5087@ox.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Nov19.010829.5087@ox.ac.uk>, lpopov@ox.ac.uk (Lisa Popov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Takeshi Karlsson "Hold for relay." Amiga 1200 (Blizzard 030/50) / System 7.5.1 From blindqvist@kth.se Wed Nov 20 11:58:29 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!blindqvist From: blindqvist@kth.se (Bruno Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov20.115829.6335@kth.se> Date: Wed, 20 Nov 1996 11:58:29 GMT References: <1996Nov19.010829.5087@ox.ac.uk> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Nov19.010829.5087@ox.ac.uk>, lpopov@ox.ac.uk (Lisa Popov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Bruno Lindqvist | blindqvist@kth.se PGP Key fingerprint: CFC0 96FB C099 AE99 "Keep the channels open." From bvasiliev@clari.net Wed Nov 20 16:41:29 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!bvasiliev From: bvasiliev@clari.net (Bill Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov20.164129.7772@clari.net> Date: Wed, 20 Nov 1996 16:41:29 GMT References: <1996Nov19.010829.5087@ox.ac.uk> <1996Nov20.115829.6335@kth.se> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Nov20.115829.6335@kth.se>, blindqvist@kth.se (Bruno Lindqvist) writes: > Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Bill Vasiliev === Dept of Electrical Engineering, ClariNet Communications Corp "The carrier frequency does not drift by accident."