AST RESEARCH, INC.        TECHNICAL BULLETIN # 1551         8-13-96  
 
 
 
TITLE: Ascentia, CardWizard, A20/220 Conflict
 
 
SUMMARY 
 
   The multimedia Ascentia J may experience an address conflict with 
   the CardWizard add-in card.

   This issue affects all multimedia Ascentia J systems or other 
   multimedia computers using SystemSoft's CardWizard.


ISSUE 
 
   An address conflict may result if the sound chip in the Ascentia J
   multimedia computer is configured to use port address 220h, and 
   a PC card using CardWizard is configured for port address A20h. 


BACKGROUND 
 
   By default, CardWizard is configured to decode I/O (input/output) 
   by looking at the first 10 bits of a port address.  When the 
   hexadecimal numbers A20h and 220h are translated to binary form, 
   they look the same if only the first ten digits are read.

      A20h = 101000100000
      220h =   1000100000

   When reading from left to right, if only the first ten digits are 
   read, these two numbers look identical.
 
 
ACTION 
 
   To correct this problem the user must modify the CSALLOC.EXE file
   parameters.  To do so, follow the steps listed below:

   1.  In the Cardwiz directory, enter the following:
       config /all 
   2.  Press the  keys to open the utilities menu.
   3.  Press the down arrow key to Binary Adaptation and press the 
        key.
   4.  Press the  keys.
   5.  Press the down arrow key to CSALLOC.EXE and press the 
       key.
   6.  Press the down arrow key to /IODECODE and press the  
       keys to edit the file.  The Default value will be A.  Change
       this value to C.
   7.  Press the  key twice.
   8.  Press the  keys to save the changes and then press the 
       [esc] key.
   9.  Press the  keys to open the file menu.
   10. Press the  key to exit the configuration utility.
   11. Reboot the system.
 
 
NOTES 
 
   N/A
 
TAN 003400GW 
 
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