From lkang@uni-hamburg.de Mon Jul 04 02:46:42 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!lkang From: lkang@uni-hamburg.de (Lucia Kang) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul04.024642.9779@uni-hamburg.de> Date: Mon, 04 Jul 1994 02:46:42 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de 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. 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? -- Lucia Kang Zyxel U-1496E @ 9600 Telebit bps "In theory there is no difference between theory and practice." From dlarsson@purdue.edu Tue Jul 05 20:27:42 1994 Path: ashpoly!cascade!brgate!saturno!purdue!dlarsson From: dlarsson@purdue.edu (Dmitri Larsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul05.202742.8549@purdue.edu> Date: Tue, 05 Jul 1994 20:27:42 GMT References: <1994Jul04.024642.9779@uni-hamburg.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Jul04.024642.9779@uni-hamburg.de>, lkang@uni-hamburg.de (Lucia Kang) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. If you are posting from AOL, please read RFC 1036 before posting again. -- Dmitri Larsson Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------ From tokonkwo@demon.co.uk Wed Jul 06 22:22:42 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!tokonkwo From: tokonkwo@demon.co.uk (Tyler Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul06.222242.9634@demon.co.uk> Date: Wed, 06 Jul 1994 22:22:42 GMT References: <1994Jul04.024642.9779@uni-hamburg.de> <1994Jul05.202742.8549@purdue.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jul05.202742.8549@purdue.edu>, dlarsson@purdue.edu (Dmitri 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- === Tyler Okonkwo === Dept of Electrical Engineering, Demon Internet Services UK "Row 14. No joke." From kpopov@unam.mx Thu Jul 07 10:15:42 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!kpopov From: kpopov@unam.mx (Kenji Popov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul07.101542.2405@unam.mx> Date: Thu, 07 Jul 1994 10:15:42 GMT References: <1994Jul04.024642.9779@uni-hamburg.de> <1994Jul05.202742.8549@purdue.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Jul05.202742.8549@purdue.edu>, dlarsson@purdue.edu (Dmitri 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. > If you are posting from AOL, please read RFC 1036 before posting again. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Kenji Popov *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From dsato@uni-hamburg.de Fri Jul 08 06:47:42 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!dsato From: dsato@uni-hamburg.de (Diego Sato) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul08.064742.4805@uni-hamburg.de> Date: Fri, 08 Jul 1994 06:47:42 GMT References: <1994Jul04.024642.9779@uni-hamburg.de> <1994Jul05.202742.8549@purdue.edu> <1994Jul06.222242.9634@demon.co.uk> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Jul06.222242.9634@demon.co.uk>, tokonkwo@demon.co.uk (Tyler Okonkwo) 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? Top-posters will be placed in my ~/.killfile without notice. -- Diego Sato *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0