Int 14 Fn 400D  - I1541 - Longwait                                         [t]

   AX = 400Dh
   DX:CX = number of 838ns microticks to wait
         (0000h:0000h means 4294967296, about one hour)
Example: To wait 1s you must set DX:CX=(1s/838ns)=1193180

See Also: AX=4000h,AX=400Ch