Int 10 Fn 4A  - Video - Block Fill (hercules Grafix)                       [V]

   AH = 4Ah
   DI = x coordinate of lower left corner
   BP = y coordinate of lower left corner
   BX = height in pixels
   CX = width in pixels
Desc:  draw a solid rectangle of the specified size at the given location

See Also: AH=4Eh