From kvasiliev@purdue.edu Tue May 28 09:21:25 1996 Path: ashpoly!cascade!bigsur!purdue!kvasiliev From: kvasiliev@purdue.edu (Kenji Vasiliev) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996May28.092125.5468@purdue.edu> Date: Tue, 28 May 1996 09:21:25 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. 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? -- === Kenji Vasiliev === Dept of Electrical Engineering, Purdue University Engineering Computer Network "When every node is whole, the channel opens." From rokonkwo@stanford.edu Wed May 29 14:04:25 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!rokonkwo From: rokonkwo@stanford.edu (Renata Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996May29.140425.9840@stanford.edu> Date: Wed, 29 May 1996 14:04:25 GMT References: <1996May28.092125.5468@purdue.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996May28.092125.5468@purdue.edu>, kvasiliev@purdue.edu (Kenji Vasiliev) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Top-posters will be placed in my ~/.killfile without notice. -- Renata Okonkwo -- Stanford University Computer Systems Lab "Row 14. No joke." From cmacdonald@kth.se Wed May 29 16:30:25 1996 Path: ashpoly!cascade!brgate!saturno!kth!cmacdonald From: cmacdonald@kth.se (Callum MacDonald) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996May29.163025.3272@kth.se> Date: Wed, 29 May 1996 16:30:25 GMT References: <1996May28.092125.5468@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996May28.092125.5468@purdue.edu>, kvasiliev@purdue.edu (Kenji Vasiliev) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Callum MacDonald *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0