Last Revised
AST RESEARCH, INC.        TECHNICAL BULLETIN # 1788          01/06/98 
 
 
 
TITLE:  Ascentia M Hangs w/CardBus &16-bit Card
 
 
ISSUE 
 
   When booting the Ascentia M with both a CardBus  card (such as 
   the 3Com 3C575) and a legacy 16-bit PCMCIA card inserted, the 
   system will hang at the Windows 95 logo or login screen. If 
   either card is removed before booting, the system boots 
   correctly.
   
   This issue applies to all Ascentia M systems and may apply to all 
   systems using CardBus technology.    

 
BACKGROUND 
 
   Windows 95 arbitrates resources for the cards. Some conflicts can 
   occur if the user does not follow the settings listed in the 
   ACTION section. Per Microsoft's  suggestion, these setting allow 
   for a free interrupt. 
   
   For further information on this issue, see the following 
   Microsoft Knowledge Base articles: Q171284, Q169652, Q164222, and 
   Q164223, or search the Microsoft Support Web site for "CardBus". 
   These articles are posted on Microsoft's support Web site as of 
   this printing.    

 
ACTION 
 
   Move the 16-bit card to IRQ 3.  
   
   Move the CardBus card to IRQ 11. This will leave IRQ 10 free.
   
   For IRQ settings, refer to the card's user's manual.
   
   
   See the Notes section for information about conflicts.    

 
NOTES 
 
   Setting the 16-bit card to IRQ3 set it in conflict with the Infra 
   Red (IR) port built into the system. This did not interfere with 
   the operation of the system, and both devices were used 
   separately in all the cards tested by AST. If other cards do not 
   seem to work with the IR port conflict, disable the port.  
   
   
   To DISABLE the IR port, perform the following: 
   
   1. Set up the cards as described in the ACTION section. 
   
   2. Remove the IR port from this configuration by checking
      the "Disable in this hardware profile" box for the 
      "Built-in Infrared Port on laptop or desktop" under 
      Ports in Device Manager.    

 
TAN TPR 19451JB 
 
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