EPSON AMERICA, INC.                                         
      
SERVICE      PRODUCT SUPPORT BULLETIN   

PSB NO.: S-0017A     DATE: 6/29/88             PAGE: 1 of 1      
   
SUBJECT:  EQUITY COMPUTERS AND FLOPPY DISK DRIVES               
      
                                                                 
    There is still some  confusion regarding which  FDDs will work 
    with which Equity. Here is a quick reference for FDD selection 
    (for detailed information, refer to PSB Number S-0001).       

      Equity I            Epson Q520A-AA (360 KB)1               
                                               
      Equity I+           Epson Q213A-AA (360 KB)                
                          Epson A112A-AA (720 KB, 3.5")          
  
      Equity II           Epson Q213A-AA (360 KB)                
                          Epson Q911A-AA (1.2 MB)2               
  
      Equity II+          Epson Q213A-AA (360 KB)                
                          Epson Q212A-AA (1.2 MB)                
                          Epson A112A-AA (720 KB, 3.5")          
  
      Equity III          Epson Q213A-AA (360 KB)                
                          Epson Q212A-AA (1.2 MB)                
  
      Equity III+         Epson Q213A-AA (360 KB)                
                          Epson Q212A-AA (1.2 MB)                
                          Epson A112A-AA (720 KB, 3.5")          
  
                                                                 
    1 - This is the only FDD compatible with the Equity I.       
    
    2 - This is the only 1.2 MB FDD compatible with the Equity II. 
  
                                                                 
    One of the key issues is: NEVER USE ANY 1.2 MB FDD OTHER THAN 
    THE  Q911A-AA  IN THE  EQUITY II!  The interface  is slightly 
    different  from the AT  "standard".  As a result,  an AT-type 
    drive will work erratically (if at all).  One of the problems 
    is a  disk change error,  or continuing to use  the directory 
    from a previous disk.                                        
    
    Also on the Equity II,  MS-DOS 3.2  does not allow sufficient 
    retries on diskette read/write with the Q911A-AA.  Consistent 
    "Abort, retry, ignore?"  messages  result  when attempting to 
    log a new disk.  Typically, "r" for  retry will overcome this 
    situation. MS-DOS 3.2 operation with the Q213A-AA is correct. 
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