Int 10 Fn 6F02  - Hp Vectra Ex-bios - Set Monitor Info                     [V]

   AX = 6F02h
   BL = new value for extended control register (see #0122)

Return: AX,BL destroyed

Notes: this function is only valid when an HP MultiMode Video Display Adapter
     is installed
   the Extended Control register is at I/O address 3DDh

See Also: AX=6F01h,AX=6F03h

Bitfields for HP Vectra extended control register:
Bit(s) Description (Table 0122)
 0 screen resolution (0 = 200 lines, 1 = 400 lines)
 1 underline enable (if set, 'blue' of fg color = underline)
 2 font (0 = Standard-8, 1 = HP-Roman-8)
 3 memory disabled for CPU access
 4 allow access to full 32K memory instead of wrapping at 16K
 5 select second 16K page instead of first
 6,7   unused