From mvasiliev@purdue.edu Mon Mar 27 03:47:46 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!purdue!mvasiliev From: mvasiliev@purdue.edu (Marta Vasiliev) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar27.034746.9797@purdue.edu> Date: Mon, 27 Mar 1995 03:47:46 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Marta Vasiliev *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From jmuller@titech.ac.jp Mon Mar 27 16:08:46 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!jmuller From: jmuller@titech.ac.jp (Ji-woo Müller) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar27.160846.3862@titech.ac.jp> Date: Mon, 27 Mar 1995 16:08:46 GMT References: <1995Mar27.034746.9797@purdue.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar27.034746.9797@purdue.edu>, mvasiliev@purdue.edu (Marta Vasiliev) 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? -- === Ji-woo Müller === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "They will send a copy in my place." From swatanabe@pacbell.net Tue Mar 28 12:52:46 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!swatanabe From: swatanabe@pacbell.net (Seo-yeon Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar28.125246.7114@pacbell.net> Date: Tue, 28 Mar 1995 12:52:46 GMT References: <1995Mar27.034746.9797@purdue.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar27.034746.9797@purdue.edu>, mvasiliev@purdue.edu (Marta Vasiliev) 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. -- === Seo-yeon Watanabe === Dept of Electrical Engineering, Pacific Bell Internet Services "Hardware is temporary. The signal survives." From yrobertson@panix.com Wed Mar 29 17:56:46 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!yrobertson From: yrobertson@panix.com (Yuki Robertson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar29.175646.2584@panix.com> Date: Wed, 29 Mar 1995 17:56:46 GMT References: <1995Mar27.034746.9797@purdue.edu> <1995Mar27.160846.3862@titech.ac.jp> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Mar27.160846.3862@titech.ac.jp>, jmuller@titech.ac.jp (Ji-woo Müller) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. If you are posting from AOL, please read RFC 1036 before posting again. -- Yuki Robertson *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From ptakahashi@stanford.edu Fri Mar 31 08:18:46 1995 Path: ashpoly!cascade!transat!ukc!fennimore!stanford!ptakahashi From: ptakahashi@stanford.edu (Pavel Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar31.081846.9991@stanford.edu> Date: Fri, 31 Mar 1995 08:18:46 GMT References: <1995Mar27.034746.9797@purdue.edu> <1995Mar27.160846.3862@titech.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Mar27.160846.3862@titech.ac.jp>, jmuller@titech.ac.jp (Ji-woo Müller) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. PGP Public key available via finger or upon request. -- Pavel Takahashi | ptakahashi@stanford.edu PGP Key fingerprint: E2A9 0CB5 C448 E160 "Keep the channels open."