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From: zazula@uazhe0.physics.arizona.edu (RALPH ZAZULA)
Newsgroups: comp.sys.next
Subject: DSP info needed for A/D project
Message-ID: <5FEB91105638@uazhe0.physics.arizona.edu>
Date: 5 Feb 91 18:56:38 GMT
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I expect to get my '030 cube from Bland within the next 2 weeks 
and the first project I am gearing up for (besides installing
my HD) is building a 16-bit, dual-channel, 50KHz bandwidth,
A/D converter for use with the DSP chip (primarily - audio
recording).  What I need to know is : is the 
basic documentation that comes with the NeXT enough to tell me
how to interface with the DSP "C" port?  I need to know what 
signals are required to send data to the DSP.  I thought I saw
somewhere that the DSP port has a similar protocoll as RS-232
or something?  Is that right?  

I saw postings saying that the NeXT Technical Docs. weren't being
shipped yet.  Is there any other source for info on the 56001?

Thanks,
Ralph Zazula

P.S. if anyone is intersted, I'm using a 100KHz f_s(max) dual 18-bit
     A/D chip with SNR 90dB, on-chip S/H, automatic linearity error
     correction, guaranteed linearity accuracy of 15 bits...... 
     (quite a slick chip, if you ask me!)
   |----------------------------------------------------------------------|
   | Ralph Zazula                               "Computer Addict!"        |
   | University of Arizona                 ---  Department of Physics     |
   |   UAZHEP::ZAZULA                            (DecNet/HEPNet)          |
   |   zazula@uazhe0.physics.arizona.edu         (Internet)               |
   |----------------------------------------------------------------------|
   |   "You can twist perceptions, reality won't budge."  - Neil Peart    |
   |----------------------------------------------------------------------|