Tucker and Davis AP2 board (Pierre Divenyi )

Subject: Tucker and Davis AP2 board
From:    Pierre Divenyi  <pdivenyi(at)MARVA4.NCSC.MED.VA.GOV>
Date:    Fri, 24 Jul 1998 17:41:15 -0700

Dear Tucker and Davis Customer Members of the List, For quite some time now, we are trying to implement a very simple routine: take a waveform, break it into chunks (because it is longish, but definitely shorter than 1 MB), load it into the T&D AP2 board, and play it out. Well, folks, our two AP2 boards do the same thing: we can transfer correctly about 2K words (a little more but not corresponding to 4K octal, either), and then goes haywire -- we hear garbage and, when we dump the AP2 on-board memory buffer, we read garbage. The question is: is there anybody out there who has successfully done a similar operation? Although we get a sympathetic hearing at T&D, for well over a month we have been left struggling with something that smells as either a hardware or a firmware bug. The firmware idea may be only likely because both boards act the same way. Of course, it is also possible that we erred on the programming side although we have checked and tried everything humanly possible. Thank you for your help! Pierre **************************************************************************** Pierre Divenyi Experimental Audiology Research (151) V.A. Medical Center, Martinez, CA 94553, USA Phone: (925) 370-6745; Fax: (925) 228-5738 E-mail : PDivenyi(at)ucdavis.edu **************************************************************************** Email to AUDITORY should now be sent to AUDITORY(at)lists.mcgill.ca LISTSERV commands should be sent to listserv(at)lists.mcgill.ca Information is available on the WEB at http://www.mcgill.ca/cc/listserv

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DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University