From dhernandez@unam.mx Tue Nov 22 00:52:30 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!dhernandez From: dhernandez@unam.mx (Dmitri Hernández) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov22.005230.4506@unam.mx> Date: Tue, 22 Nov 1994 00:52:30 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Dmitri Hernández | dhernandez@unam.mx PGP Key fingerprint: DEC3 9D68 211B B8D8 "Keep the channels open." From kwatanabe@mindspring.com Tue Nov 22 15:00:30 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!kwatanabe From: kwatanabe@mindspring.com (Kirsty Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov22.150030.6476@mindspring.com> Date: Tue, 22 Nov 1994 15:00:30 GMT References: <1994Nov22.005230.4506@unam.mx> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Nov22.005230.4506@unam.mx>, dhernandez@unam.mx (Dmitri Hernández) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Kirsty Watanabe -- MindSpring Enterprises "Row 14. No joke." From sfischer@netcom.com Tue Nov 22 23:00:30 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!sfischer From: sfischer@netcom.com (Steve Fischer) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov22.230030.8212@netcom.com> Date: Tue, 22 Nov 1994 23:00:30 GMT References: <1994Nov22.005230.4506@unam.mx> <1994Nov22.150030.6476@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov22.150030.6476@mindspring.com>, kwatanabe@mindspring.com (Kirsty Watanabe) 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. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Steve Fischer "Hardware is temporary. The signal survives." 486DX2/66 (Linux 1.2.13) / System 7.5.1 From gnakamura@stanford.edu Thu Nov 24 04:36:30 1994 Path: ashpoly!cascade!brgate!saturno!stanford!gnakamura From: gnakamura@stanford.edu (Graham Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov24.043630.6783@stanford.edu> Date: Thu, 24 Nov 1994 04:36:30 GMT References: <1994Nov22.005230.4506@unam.mx> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Nov22.005230.4506@unam.mx>, dhernandez@unam.mx (Dmitri Hernández) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Graham Nakamura "They will send a copy in my place." Pentium 90 (OS/2 Warp) / TOS 4.04