INT 30 - (NOT A VECTOR!) - DOS 1+ - FAR JMP instruction for CP/M-style calls
the CALL 5 entry point does a FAR jump to here
Note:   under DOS 2+, the instruction at PSP:0005 points two bytes too low in
memory

See also: 2126

30 - (NOT A VECTOR!) - DOS 1+ - FAR JMP instruction for CP/M-style calls