Int 10 Fn 5F00  - Video - Realtek Rtvga - Return Chip Version              [V]

   AX = 5F00h

Return: AH = 00h, if successful
   AL = chip version (the same value that VTEST.EXE reads)
       00h RTG3103???
       01h RTG31030/RTG3105
       02h RTG3106???
       3Fh non-Realtek chip
BUG:   in v3.C10, AX=5F00h on return due to improper stack restoration code

See Also: AX=5F01h"RTVGA"