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Values DOS 3.30+ FASTOPEN entry point is called with

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AX =
01h Lookup


CX = ??? seems to be offset
DI = ??? seems to be offset
SI = offset in DOS DS of filename
02h insert file into FASTOPEN cache
03h delete file from FASTOPEN cache
Data: SI = offset in DOS DS of filename
04h purge FASTOPEN cache


AH = subfunction (00h,01h,02h)
ES:DI ???
CX = ??? (subfunctions 01h and 02h only)
CF - set on error or not installed
Notes: Function 03h calls function 01h first.
See Also:  #02612,#02613