Int 10 Fn 09  - Video - Write Character And Attribute At Cursor Position   [V]

   AH = 09h
   AL = character to display
   BH = page number (00h to number of pages - 1) (see AH=00h)
   BL = attribute (text mode) or color (graphics mode)
        if bit 7 set in graphics mode, character is xor'ed onto screen
   CX = number of times to write character

Notes: all characters are displayed, including CR, LF, and BS
   replication count in CX may produce an unpredictable result in graphics
     modes if it is greater than the number of positions remaining in the
     current row

See Also: AH=08h,AH=0Ah,AH=4Bh"GRAFIX",INT 17/AH=60h,INT 1F,INT 43,INT 44