INT 10 - Microsoft Mouse driver EGA support - READ ONE REGISTER        
  
    | 
       Input  | 
    
       Output  | 
   
  
    | 
       AX 
     | 
    F0h | 
      | 
      | 
      | 
    AX | 
   
  
    | 
       BX 
     | 
      | 
    Register Number | 
      | 
    Data | 
    BX | 
   
  
    | 
       CX 
     | 
      | 
      | 
      | 
      | 
    CX | 
   
  
    | 
       DX 
     | 
     Group
      Index | 
      | 
      | 
    DX | 
   
  
    | ES:DI | 
      | 
      | 
    ES:DI | 
   
 Pointer/data chips:
        00h = CRT Controller (25 reg) 3B4h mono modes, 3D4h color modes
        08h = Sequencer (5 registers) 3C4h
        10h = Graphics Controller (9 registers) 3CEh
        18h = Attribute Controller (20 registers) 3C0h
Single registers:
        20h = Miscellaneous Output register 3C2h
        28h = Feature Control register (3BAh mono modes, 3DAh color modes)
        30h = Graphics 1 Position register 3CCh
        38h = Graphics 2 Position register 3CAh |