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INT 14h, 7Fh Remove an "external application" function
Entry: AL Code assigned to external application
DX Offset of application entry point
ES Segment of application entry point
Exit: AX 1954h
BL Code assigned to application (same as input AL)
BH 01h - Removal was successful
00h - Removal failed
Removes an application's entry into the table. Usually so it can remove
itself from memory. Error return means ES:DX did not match or that there
is no entry at the slot described by AL.
An application that wants to remove itself from memory can issue the 7F
function to remove itself from the table, then, if it is successful, get
out of memory. If it had to install itself with an INT 14h dispatcher it
may back itself out, provided no other applications have been installed
on top of it (using its dispatcher).