Int E0  - Dr Multiuser DOS - "a_writeblk" - Write String To Aux Device     [O]

   CL = ADh
   DS:DX -> character control block (see INT E0/CL=ACh)

Return: AX = number of characters written

Note:  does not return until at least one character has been written

See Also: INT E0/CL=04h,INT E0/CL=A5h,INT E0/CL=ACh