Int 1A Fn E302 - Disk Spool Ii V4.0x - Update Spool File [c]
AX = E302h
ES:BX -> ASCIZ filename (max 32 chars)
ES:SI -> spool file status record (see #0958)
Return: AH = status
00h successful
F0h not a spool file
FFh failed
Note: this function is also supported by Vertisoft's Emulaser utility ELSPL,
as that is a licensed version of Disk Spool II
See Also: AH=E0h,AX=E301h,AX=E401h