INT 10 - VIDEO - MSHERC.COM - INSTALLATION CHECK???
AH = EFh
Return: DL = video adapter type
00h original Hercules
01h ???  \ one is probably Hercules Plus, the other
02h ???  / Hercules InColor
FFh non-Hercules
DH = memory mode byte
01h "half" mode
03h "full" mode
Note:   MSHERC.COM is a support program for the Microsoft Quick languages which
makes their graphics libraries compatible with a Hercules card by
adding video modes 08h and 88h, and supporting text in the new
graphics modes.  While in mode 08h or 88h, INT 10 supports the
Hercules card much like a CGA.


10EF - VIDEO - MSHERC.COM - INSTALLATION CHECK???