From veriksson@mindspring.com Sat Jun 24 16:35:30 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!veriksson From: veriksson@mindspring.com (Valeria Eriksson) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun24.163530.5301@mindspring.com> Date: Sat, 24 Jun 1995 16:35:30 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 10 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Valeria Eriksson -- MindSpring Enterprises "In theory there is no difference between theory and practice." From flaurent@unam.mx Sun Jun 25 01:50:30 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!flaurent From: flaurent@unam.mx (Freya Laurent) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun25.015030.4104@unam.mx> Date: Sun, 25 Jun 1995 01:50:30 GMT References: <1995Jun24.163530.5301@mindspring.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jun24.163530.5301@mindspring.com>, veriksson@mindspring.com (Valeria Eriksson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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? -- === Freya Laurent === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "Row 14. No joke." From yrobertson@titech.ac.jp Mon Jun 26 16:11:30 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!yrobertson From: yrobertson@titech.ac.jp (Yuki Robertson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun26.161130.2374@titech.ac.jp> Date: Mon, 26 Jun 1995 16:11:30 GMT References: <1995Jun24.163530.5301@mindspring.com> <1995Jun25.015030.4104@unam.mx> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jun25.015030.4104@unam.mx>, flaurent@unam.mx (Freya Laurent) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Yuki Robertson -- Tokyo Institute of Technology Computer Centre "Tape doesn't lie at 02:14. Ears do." From jkarlsson@kth.se Tue Jun 27 14:09:30 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!jkarlsson From: jkarlsson@kth.se (Jens Karlsson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun27.140930.1497@kth.se> Date: Tue, 27 Jun 1995 14:09:30 GMT References: <1995Jun24.163530.5301@mindspring.com> <1995Jun25.015030.4104@unam.mx> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun25.015030.4104@unam.mx>, flaurent@unam.mx (Freya Laurent) 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? -- Jens Karlsson "The hatch is open. Is anyone listening?" Mac IIci / 68882 FPU / FreeBSD 2.1