INT 2F U - Windows95 - FIND SFTsee System File Table ENTRY IN INTERNAL FILE TABLES
	AX = 1230h
	ES:DI -> SFTsee System File Table entry
Return: CF clear if SFTsee System File Table found in internal table
	CF set if SFTsee System File Table not in any internal file table
	    AX = 0000h
	    SI:CX = 32-bit starting cluster number for directory
	    DX = directory entry number
	    BX = index into new file system table
Notes:	the new file system table from which the return values are taken is
	  reported to be statically allocated with 20 entries, and used only
	  for FCBsee File Control Block calls
	this function is not supported by DR-DOS 7.03 or earlier, by S/DOS 1.0,
	  or by PTS-DOS 6.51
BUG:	Win95-OSR2 is reported to have a bug that can potentially corrupt
	  memory if SFTsee System File Table tables are "arranged poorly"
SeeAlso: AX=1231h,AX=1200h