From kbrennan@demon.co.uk Mon Nov 11 13:49:37 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!kbrennan From: kbrennan@demon.co.uk (Karen Brennan) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov11.134937.1158@demon.co.uk> Date: Mon, 11 Nov 1996 13:49:37 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Karen Brennan "Tape doesn't lie at 02:14. Ears do." Commodore Amiga 500 (1MB OCS) / Linux 1.2.13 From astewart@cern.ch Wed Nov 13 07:34:37 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!astewart From: astewart@cern.ch (Anton Stewart) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov13.073437.9329@cern.ch> Date: Wed, 13 Nov 1996 07:34:37 GMT References: <1996Nov11.134937.1158@demon.co.uk> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Nov11.134937.1158@demon.co.uk>, kbrennan@demon.co.uk (Karen Brennan) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Anton Stewart | astewart@cern.ch PGP Key fingerprint: D351 44D7 F752 0246 "Keep the channels open." From mmuller@purdue.edu Wed Nov 13 11:58:37 1996 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!mmuller From: mmuller@purdue.edu (Morag Müller) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov13.115837.2115@purdue.edu> Date: Wed, 13 Nov 1996 11:58:37 GMT References: <1996Nov11.134937.1158@demon.co.uk> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Nov11.134937.1158@demon.co.uk>, kbrennan@demon.co.uk (Karen Brennan) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Morag Müller "There are 14 nodes and only 10 countries. Count again." PC-9821Ap2 (NEC) / Linux 1.2.13 From nhernandez@purdue.edu Fri Nov 15 12:00:37 1996 Path: ashpoly!cascade!brgate!saturno!purdue!nhernandez From: nhernandez@purdue.edu (Nadia Hernández) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov15.120037.2236@purdue.edu> Date: Fri, 15 Nov 1996 12:00:37 GMT References: <1996Nov11.134937.1158@demon.co.uk> <1996Nov13.115837.2115@purdue.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Nov13.115837.2115@purdue.edu>, mmuller@purdue.edu (Morag Müller) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Nadia Hernández *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0