Int 10 Fn 5F03  - Chips & Technologies Extended Bios - Set Power-on Displ  [V]

   AX = 5F03h
   BL = 00h
   CL = display mode
   CH = mode (see #0116)

Return: AL = 5Fh if function supported
       AH = status
       00h unsuccessful
       01h successful

See Also: AX=5F02h,AX=5F03h/BL=01h"Chips",AX=5F90h

Bitfields for Chips&Technologies display mode:
Bit(s) Description (Table 0116)
 1-0   scanlines (00 = 200, 01 = 350, 10 = 400)
 7 persistence (0 reset on next boot, 1 until changed)