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  Interrupt:   10h     Function:   10h     Subfunction:   17h
 
  Title:       Get Block of Color Registers
 
  See also:    Set Block of Color Registers, Get Color Register
 
  Description:                                              [MCGA] [VGA]
 
     Allows the red, green, and blue components associated with each of
     a set of color registers to be read in one operation. The color
     list returned in the caller's buffer consists of a series of
     3-byte entries corresponding to the color registers. Each 3-byte
     entry contains the register's red, green, and blue components in
     that order.
 
     Input                                 Output
 
     AH = 10h                              ES:DX = segment:offset of buffer
     AL = 17h                              (Buffer contains color list)
     BX = First color register
     CX = Number of color registers
     ES:DX = segment:offset of buffer
             to receive color list
                                    -♦-