INT 14 - FOSSIL - REMOVE AN EXTERNAL APPLICATION FUNCTION
AH = 7Fh
AL = code assigned to external application
ES:DX -> entry point
Return: AX = 1954h
BL = code assigned to application (same as input AL)
DH = 00h failed
01h successful

See also: 147E

147F - FOSSIL - REMOVE AN EXTERNAL APPLICATION FUNCTION