Int 10 Fn 12  - Cirrus Logic BIOS - Inquire VGA Type                       [V]

   AH = 12h
   BL = 80h

Return: AX = controller type in bits 13-0 (see below)
       bit 14: ???
       bit 15: ???
   BL = silicon revision number (bit 7 set if not available)

See Also: AH=12h/BL=81h,AH=12h/BL=82h,AH=12h/BL=85h,AH=12h/BL=9Ah,AH=12h/BL=A1h

Values for controller type:
 0000h no extended alternate select support
 0002h 510/520
 0003h 610/620
 0004h 5320
 0005h 6410
 0006h 5410
 0007h 6420
 0008h 6412
 0010h 5401
 0011h 5402
 0012h 5420
 0013h 5422
 0014h 5424
 0015h 5426
 0016h 5420r1
 0017h 5402r1
 0018h 5428
 0020h 6205/15/25
 0030h 5432
 0031h 5434