INT 16 U - PCIBM PC Tools v8+ VSAFE, VWATCH - SET NETWORK DRIVES TEST FLAG
AX = FA07h
DX = 5945h
BL = new state
00h don't monitor
01h monitor network drives
Return: CF clear
DI = 4559h
Note: VWATCH v2.1 (from PCIBM PC Tools 9.0) returns CF set instead
SeeAlso: AX=FA00h,AX=FA06h