Int 21 Fn A2  - Attachmate Extra! - Set Host Window State                  [I]

   AH = A2h
   AL = new host window status byte (see #1486)

See Also: AH=A1h

Bitfields for Attachmate Extra! host window status:
Bit(s) Description (Table 1486)
 7 0=power off, 1=power on
 6 0=not installed, 1=installed
 5-3   reserved
 2-0   window number 1-4=host B-E