Because of the difficulties in emulating VT100 and VT52 on a PC
keyboard, users should be aware of the following information
which applies to the Scripta implementation.

Scripta ALWAYS takes over the Int 16H keyboard service on entry
and restores the vector again on normal exit.

The VT100/52 emulator also takes over Int 9H. It does so only whilst
online, reverting the interrupt to its normal state when offline.
This is necessary so that Scripta may distinguish more 'combination'
keys than are recognised by the standard PC BIOS. The term
'combination keys' refers to those occasions when the user has to
depress two or more keys simultaneously - Ctrl/U, Alt/F1,
Ctrl/Alt/Del, and so on.

When using VT100 emulation, NumLock should be switched OFF on your
keyboard.

Keys on the numeric keypad generate ANSI cursor key sequences in
Normal Mode and DEC alternate key sequences in Application Mode.

If you hold down the Shift key, the keypad may be used as a
numeric keypad.

If you hold down the Ctrl key, the keypad will produce numerics in
DEC Numeric Keypad Mode or DEC alternate sequences in Alternate
Keypad Mode.

The VT100 and VT52 emulation has been implemented largely using
third-party library functions and the above information has been
extrapolated from the documentation of the library. I would
therefore be pleased to hear of any problems in usage as users
other than Scripta users are also likely to be affected.
