From akuznetsov@hanse.de Sun May 01 12:07:01 1994 Path: ashpoly!cascade!mxgate!coyoacan!hanse!akuznetsov From: akuznetsov@hanse.de (Anja Kuznetsov) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May01.120701.2704@hanse.de> Date: Sun, 01 May 1994 12:07:01 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Anja Kuznetsov Tape trading list upon request. SASE required for international mail. From slarsson@unam.mx Tue May 03 14:37:01 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!slarsson From: slarsson@unam.mx (Sergei Larsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May03.143701.3487@unam.mx> Date: Tue, 03 May 1994 14:37:01 GMT References: <1994May01.120701.2704@hanse.de> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994May01.120701.2704@hanse.de>, akuznetsov@hanse.de (Anja Kuznetsov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > 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. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Sergei Larsson | slarsson@unam.mx PGP Key fingerprint: 3C0E C836 C2DF FDDB "Keep the channels open." From hlindqvist@utexas.edu Thu May 05 11:36:01 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!hlindqvist From: hlindqvist@utexas.edu (Heather Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May05.113601.8690@utexas.edu> Date: Thu, 05 May 1994 11:36:01 GMT References: <1994May01.120701.2704@hanse.de> <1994May03.143701.3487@unam.mx> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May03.143701.3487@unam.mx>, slarsson@unam.mx (Sergei Larsson) writes: > PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Heather Lindqvist *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From mkowalski@cmu.edu Fri May 06 20:31:01 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!mkowalski From: mkowalski@cmu.edu (Mathieu Kowalski) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May06.203101.3903@cmu.edu> Date: Fri, 06 May 1994 20:31:01 GMT References: <1994May01.120701.2704@hanse.de> <1994May03.143701.3487@unam.mx> <1994May05.113601.8690@utexas.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994May05.113601.8690@utexas.edu>, hlindqvist@utexas.edu (Heather Lindqvist) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Mathieu Kowalski *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From kito@purdue.edu Sun May 08 22:47:01 1994 Path: ashpoly!cascade!bigsur!purdue!kito From: kito@purdue.edu (Kirsty Ito) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May08.224701.6077@purdue.edu> Date: Sun, 08 May 1994 22:47:01 GMT References: <1994May01.120701.2704@hanse.de> <1994May03.143701.3487@unam.mx> <1994May05.113601.8690@utexas.edu> <1994May06.203101.3903@cmu.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994May06.203101.3903@cmu.edu>, mkowalski@cmu.edu (Mathieu Kowalski) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Kirsty Ito US Robotics Courier V.34 @ 19,200 bps "Measuring a record you own is listening, not piracy."