INT 10 - VIDEO - Video7 VGA,VEGA VGA,HP Ext BIOS - GET MONITOR INFO
        AX = 6F01h
Return: AL = monitor type code (HP,VEGA VGA only) (see below)
        AH = status register information
             bit  0 = display enable
                        0 = display enabled
                        1 = vertical or horizontal retrace in progress
             bit  1 = light pen flip flop set
             bit  2 = light pen switch activated
             bit  3 = vertical sync
             bit  4 = monitor resolution
                        0 = high resolution (>200 lines)
                        1 = low resolution (<=200 lines)
             bit  5 = display type
                        0 = color
                        1 = monochrome
             bits6,7= diagnostic bits
        CL = current value of Extended Control register (HP Ext BIOS, and only
                if AL=41h)
Note:   bits 0-3 are the same as the EGA/VGA status register bits 0-3

Values for monitor type code (HP Extended BIOS):
 00h    non-HP card with ROM and possibly its own INT 10h driver
 41h    MultiMode video display adapter
 42h-44h reserved
 45h    industry standard monochrome display adapter
 46h    industry standard color display adapter
 51h    reserved

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