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 AT&T PC6300 SUPPORT BBS - Bulletin Service                         
                                                                    
 SUBJECT:  AT&T PC6300 Mini Floppy Drive Units                      
 PROVIDED BY:  AT&T PC-Hotline                                      
                                                                    
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    USING TWO FLOPPIES OF DIFFERENT MAKES                           
        We currently have three different types of disk drives      
                                                                    
        Toshiba - door that flips down and can be ordered,          
                                                                    
        Toshiba - latch that turns clockwise (centered) (is a       
                  production model) and can't be ordered. If        
                  found defective replace with an Olivetti          
                  drive for cosmetic reasons.                       
                                                                    
        Olivetti - latch that turns clockwise (offset to left).     
                                                                    
        These drives have their data connector in different         
        places making it impossible to use the one MFD cable to     
        connect them unless the machine is equipped with the        
        100mm (new) cable as opposed to the standard 50mm (old)     
        cable. This change was in affect approximately 1/1/85.      
        You should determine which cable you have before            
        ordering a different drive replacement. Of course a         
        like replacement won't matter.                              
                                                                    
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    MAX NUMBER OF DRIVES                                            
        Our machine can support a maximum of TWO MFDUs.  Dip        
        Switches for three and four drives are only useful for      
        Ram Disks.                                                  
                                                                    
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    DIP SWITCHES - DPSW-1 Location 7W on motherboard                
                                                                    
        # of drives  |   SW-7  |  SW-8                              
        ------------------------------                              
              1      |     1   |   1                                
              2      |     0   |   1                                
              3      |     1   |   0                                
              4      |     0   |   0                                
                                                                    
        NOTE 3 AND 4 ARE ONLY FOR RAM DISKS                         
                                                                    
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    96-TPI FLOPPY DRIVES                                            
                                                                    
        MS-DOS does not have the power to use this feature even     
        though there is a dip switch for it.  That switch is        
        meant for future use and we do not support the 96-tpi       
        feature.                                                    
                                                                    
                                                                    

