From msato@panix.com Sun Feb 27 15:04:19 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!msato From: msato@panix.com (Min-jun Sato) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb27.150419.1179@panix.com> Date: Sun, 27 Feb 1994 15:04:19 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. 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. 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? -- Min-jun Sato Tape trading list upon request. SASE required for international mail. From kweber@ox.ac.uk Tue Mar 01 10:05:19 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!kweber From: kweber@ox.ac.uk (Katrin Weber) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar01.100519.6129@ox.ac.uk> Date: Tue, 01 Mar 1994 10:05:19 GMT References: <1994Feb27.150419.1179@panix.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Feb27.150419.1179@panix.com>, msato@panix.com (Min-jun Sato) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Katrin Weber Tape trading list upon request. SASE required for international mail. From thernandez@purdue.edu Wed Mar 02 12:59:19 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!purdue!thernandez From: thernandez@purdue.edu (Thiago Hernández) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar02.125919.5717@purdue.edu> Date: Wed, 02 Mar 1994 12:59:19 GMT References: <1994Feb27.150419.1179@panix.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Feb27.150419.1179@panix.com>, msato@panix.com (Min-jun Sato) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Thiago Hernández "When every node is whole, the channel opens." PC-9821Ap2 (NEC) / FreeBSD 2.1 From cnakamura@hanse.de Thu Mar 03 11:59:19 1994 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!cnakamura From: cnakamura@hanse.de (Camila Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar03.115919.5206@hanse.de> Date: Thu, 03 Mar 1994 11:59:19 GMT References: <1994Feb27.150419.1179@panix.com> <1994Mar02.125919.5717@purdue.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Mar02.125919.5717@purdue.edu>, thernandez@purdue.edu (Thiago Hernández) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Camila Nakamura -- Hanse-Netzwerk Hamburg "The hatch is open. Is anyone listening?" From lsilva@berkeley.edu Thu Mar 03 19:04:19 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!lsilva From: lsilva@berkeley.edu (Liam Silva) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar03.190419.1421@berkeley.edu> Date: Thu, 03 Mar 1994 19:04:19 GMT References: <1994Feb27.150419.1179@panix.com> <1994Mar01.100519.6129@ox.ac.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Mar01.100519.6129@ox.ac.uk>, kweber@ox.ac.uk (Katrin Weber) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Liam Silva *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0