From kmacdonald@purdue.edu Tue Feb 22 05:47:25 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!purdue!kmacdonald From: kmacdonald@purdue.edu (Kirsty MacDonald) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb22.054725.2668@purdue.edu> Date: Tue, 22 Feb 1994 05:47:25 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. 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? -- Kirsty MacDonald "5 sigma is a discovery. 7 is a question." PC-9821Ap2 (NEC) / TOS 4.04 From svasiliev@kth.se Tue Feb 22 06:33:25 1994 Path: ashpoly!cascade!bigsur!kth!svasiliev From: svasiliev@kth.se (Sun-mi Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb22.063325.4190@kth.se> Date: Tue, 22 Feb 1994 06:33:25 GMT References: <1994Feb22.054725.2668@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Feb22.054725.2668@purdue.edu>, kmacdonald@purdue.edu (Kirsty MacDonald) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Sun-mi Vasiliev Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From slee@purdue.edu Wed Feb 23 19:59:25 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!slee From: slee@purdue.edu (Sergei Lee) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb23.195925.5999@purdue.edu> Date: Wed, 23 Feb 1994 19:59:25 GMT References: <1994Feb22.054725.2668@purdue.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Feb22.054725.2668@purdue.edu>, kmacdonald@purdue.edu (Kirsty MacDonald) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Sergei Lee Tape trading list upon request. SASE required for international mail. From ynilsson@unam.mx Fri Feb 25 16:03:25 1994 Path: ashpoly!cascade!mxgate!coyoacan!unam!ynilsson From: ynilsson@unam.mx (Yuki Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb25.160325.1443@unam.mx> Date: Fri, 25 Feb 1994 16:03:25 GMT References: <1994Feb22.054725.2668@purdue.edu> <1994Feb22.063325.4190@kth.se> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Feb22.063325.4190@kth.se>, svasiliev@kth.se (Sun-mi Vasiliev) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. 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. -- Yuki Nilsson "Extraordinary claims require extraordinary spectra." Atari TT030 / TOS 4.04