INT 10H 4f03H - Query Current SuperVGA Video Mode
Expects: AX 4f03H
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Returns: AX VESA status: AH=0 means successful (else failed)
AL=4fH means function supported
BX VESA/SVGA Video Mode number currently active
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Info: Obtains the number of the current video mode.
Notes: ■ Unlike INT 10H 0fH, this does NOT return the state of "clear
video memory bit" that was used when the mode was initialized;
that is, only the high bit of BX always comes back as 0.
See Also: SVGA
VESA/SVGA BIOS Services
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