Changeset 699

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Timestamp:
01/15/00 20:10:07 (9 years ago)
Author:
mds
Message:

(mds) add Banshee and DDC information.

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  • lm-sensors/trunk/doc/busses/i2c-voodoo3

    r461 r699  
    55Supported adapters: 
    66  * 3dfx Voodoo3 based cards 
    7   * Voodoo Banshee based cards? 
     7  * Voodoo Banshee based cards 
    88 
    99Author: Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock 
    10         <phil@netroedge.com>, and Ralph Metzler  
    11         <rjkm@thp.uni-koeln.de> 
     10        <phil@netroedge.com>, Ralph Metzler <rjkm@thp.uni-koeln.de>, 
     11        and Mark D. Studebaker <mdsxyz123@yahoo.com> 
    1212 
    1313Main contact: Philip Edelbrock <phil@netroedge.com> 
    …… 
    2525----------- 
    2626 
    27 The 3dfx Voodoo3 chip contains an I2C interface/driver (aka a I2C 'master' 
    28 or 'host').  The intent by 3dfx was to allow manufacturers to add extra 
     27The 3dfx Voodoo3 chip contains two I2C interfaces (aka a I2C 'master' 
     28or 'host').  
     29 
     30The first interface is used for DDC (Data Display Channel) 
     31which is a serial channel through the VGA monitor connector 
     32to a DDC-compliant monitor. This interface is defined by the 
     33Video Electronics Standards Association (VESA). The standards 
     34are available for purchase at http://www.vesa.org . 
     35 
     36The second interface is a general-purpose I2C bus. 
     37The intent by 3dfx was to allow manufacturers to add extra 
    2938chips to the video card such as a TV-out chip such as the BT869 or possibly 
    3039even I2C based temperature sensors like the ADM1021 or LM75. 
    …… 
    4150machines. 
    4251 
     52Simultaneous accesses of the DDC and I2C busses may cause errors. 
     53 
    4354 
    4455Supported Devices 
    …… 
    47583000' which has a tv-out feature (s-video or composite).  According to the 
    4859docs and discussions, this code should work for any Voodoo3 based cards as 
    49 well as Voodoo Banshee based cards.  Voodoo Banshee cards, however, are not 
    50 probed or detected until I can find a test user to help out in the testing, 
    51 so please contact me (phil@netroedge.com) if you have a Banshee and want  
    52 to help. 
     60well as Voodoo Banshee based cards.  The DDC interface has been tested 
     61on a Voodoo Banshee card. 
    5362         
    5463Features