INT 16 - PC Tools v5.1-5.5 PCShell API - GET ???
AX = FFDDh
BX = 0002h
Return: AL =
00h ???
01h ???
Note:   PCShell v6.0+ displays the error message "Incorrect PCRUN version",
awaits a keystroke, and aborts the current process


16FFDDBX0002 - PC Tools v5.1-5.5 PCShell API - GET ???