Category: DOS kernel
INT 21 - European MS-DOS 4.0 - "FREEZE" - STOP A PROCESS AH = 81h BX = flag (00h freeze command subtree, 01h only specified process) CX = Process ID of head of command subtree Return: CF clear if successful CF set on error AX = error code (no such process) Desc: temporarily suspend a process or a process and all of its children Note: if BX=0001h, this call will not return until the process is actually frozen, which may not be until after it unblocks from an I/O operation SeeAlso: AH=82h,AH=89h,AX=8E00h,INT 15/AX=101Dh