4b00H load and execute program 26H Build PSP ◄superseded► 4b01H load program 4b03H load overlay 4b05H set execution state (SetVer version info) 4cH terminate 00H and INT 20H ◄superseded► 4dH get exit code of child process 31H terminate and keep memory (TSR) INT 27H ◄superseded► 51H get PSP of current process See also: TSR/Popup Functions 50H set current PSP Program Segment Prefix 34H get InDOS and ErrorMode addresses INT 23H Ctrl+Break handler vector (default handler terminates program) INT 24H Critical Error handler vector (default handler may terminate you) INT 2fH aexxH Control execution of DOS commands Program Startup & Exit conditions when a program starts DPMI Services EXE File Header DOS Environment CONFIG.SYS ────────────────────────────────────────────────────────────────────────────── TSR/Popup Functions Memory Functions Service Groups DOS Functions