INT E0 - REAL/32 - "DEV_TWAITFLAG" - TIMED WAIT ON SYSTEM FLAG CL = B7h DS:DX -> Flag Parameter Block (FPB) (see #04058) Return: AX = status may destroy SI,DI,DS Note: if the flag was already set, this function returns immediately SeeAlso: INT E0/CL=84h,INT E0/CL=85h Format of REAL/32 Flag Parameter Block (FPB): Offset Size Description (Table 04058) 00h WORD number of system flag on which to wait 02h WORD maximum number of system ticks (see INT E0/CL=9Ah) to wait