INT 10 - Chips & Technologies Extended BIOS - SET POWER-ON VIDEO CONDITIONS
        AX = 5F03h
        BL = configuration
            00h power-up display mode
                CL = display mode
                CH = mode
                    bits 1-0 scanlines
                        00: 200
                        01: 350
                        10: 400
                    bit 7 persistence (0 reset on next boot, 1 until changed)
            01h power-up emulation mode
                CL = emulation mode (see AX=5F01h"Chips")
                CH = permanence (00h reset after next boot, 01h until changed)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F02h,AX=5F03h/BL=01h,AX=5F90h

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