Int 10/AX=4F0Bh

AX = 4F0Bh
ECX = ???
???

Return:
AL = 4Fh if function supported
AH = status
00h successful
ECX = ???
???
01h failed

Note: In BIOS v1.62, ECX is in multiples of 10000 (decimal) for both input and output, and this function never fails

Category: Video - Int 10h - D