From kgirard@cam.ac.uk Sat Sep 09 10:47:56 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!kgirard From: kgirard@cam.ac.uk (Karen Girard) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep09.104756.6205@cam.ac.uk> Date: Sat, 09 Sep 1995 10:47:56 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 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. 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Karen Girard | kgirard@cam.ac.uk PGP Key fingerprint: F98C 8AAB 3950 0546 "Keep the channels open." From tkang@purdue.edu Sun Sep 10 22:22:56 1995 Path: ashpoly!cascade!brgate!saturno!purdue!tkang From: tkang@purdue.edu (Tomas Kang) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep10.222256.4417@purdue.edu> Date: Sun, 10 Sep 1995 22:22:56 GMT References: <1995Sep09.104756.6205@cam.ac.uk> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Sep09.104756.6205@cam.ac.uk>, kgirard@cam.ac.uk (Karen Girard) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Tomas Kang *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From toliveira@earthlink.net Mon Sep 11 09:41:56 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!toliveira From: toliveira@earthlink.net (Takeshi Oliveira) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep11.094156.1754@earthlink.net> Date: Mon, 11 Sep 1995 09:41:56 GMT References: <1995Sep09.104756.6205@cam.ac.uk> <1995Sep10.222256.4417@purdue.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep10.222256.4417@purdue.edu>, tkang@purdue.edu (Tomas Kang) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. > Unsubscribe me from this list! (Wait, this is Usenet, never mind). Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- === Takeshi Oliveira === Dept of Electrical Engineering, EarthLink Network "Measuring a record you own is listening, not piracy." From jito@stanford.edu Tue Sep 12 14:33:56 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!jito From: jito@stanford.edu (Joachim Ito) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep12.143356.8634@stanford.edu> Date: Tue, 12 Sep 1995 14:33:56 GMT References: <1995Sep09.104756.6205@cam.ac.uk> <1995Sep10.222256.4417@purdue.edu> <1995Sep11.094156.1754@earthlink.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Sep11.094156.1754@earthlink.net>, toliveira@earthlink.net (Takeshi Oliveira) 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? Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Joachim Ito Tape trading list upon request. SASE required for international mail. From bgirard@titech.ac.jp Thu Sep 14 05:44:56 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!titech!bgirard From: bgirard@titech.ac.jp (Brian Girard) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep14.054456.1615@titech.ac.jp> Date: Thu, 14 Sep 1995 05:44:56 GMT References: <1995Sep09.104756.6205@cam.ac.uk> <1995Sep10.222256.4417@purdue.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Sep10.222256.4417@purdue.edu>, tkang@purdue.edu (Tomas Kang) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. If you are posting from AOL, please read RFC 1036 before posting again. -- Brian Girard | bgirard@titech.ac.jp PGP Key fingerprint: 73D7 39B2 D6F1 E0AE "Keep the channels open."