Screen formatting with VT100 is not readable for all FDISK options

[eyalabraham]

Opening screen for FDISK is ok, but selecting to display partition table (option 4) does not display a readable screen.
Have tty dump from INT10/02h and INT10/09h for that screen.

11/28/13,
Replay of tty dump shows a clear screen command sent to the console.
Clear screen can only be sent from INT10/06h when AL=0 so not clear why this combination is called in the middle of printing the screen out; will add a register trace in function 06h to see what the other registers contents is -- that said said, if AL=0 then we need to clear the screen ignoring all other registers, so not really clear on what other action to take when AL=0... after getting register values will try to run this in a virtual DOS to see what a regular BIOS does.

11/29/13, commit 4695324...
updated INT10/06h to be able to scroll entire window or just a sub-window with VT100 DECSTBM command.