VideoID v/1.3: written by Bob Berry, Canyon State Systems -> Public Domain  
Step/function______ method__________________ ah al bh bl ch cl dh dl  result
1. Look for VGA     video int ax=1A00h       1A 1A 00 08 00 00 00 00  FOUND 
2. Look for EGA     video int ah=12h bl=10h                           skip  
3. Look for CGA     find 6845 CRTC at 3D4h                            skip  
4. Look for MDA     find 6845 CRTC at 3B4h                            skip  
5. Look for HERC    check MDA status bit 7                            skip  
6. Identify active  single display is active                          skip  
       Active Video=VGA adapter, PS/2 color monitor.                        
     Inactive Video=(none).                                                 
7. Peek at EGA/VGA video RAM at C000:0000                                   
  |U.0..740010/13/89-14:00:00....IBM COMPATIBLE.........003145-104COPYRIGHT|
  | WESTERN DIGITAL INC. 1987,1989, ALL RIGHTS RESERVED.VGA=E...8(-........|
  |.....qPZ.............8(-...dp........aPR...............=..u......U3.....|
8. Identify VGA (and video memory, if possible).                            
     IBM 8514/a............no          Hercules Graphics Station..no        
     Ahead Systems type A..no          Ahead Systems type B.......no        
     Tseng 3000............no          Tseng 4000.................no        
     Everex................no          Trident....................no        
     ATI...................no          Video7.....................no        
     Paradise..............FOUND 512k  Chips & Technologies.......no        
     Oak Technologies......no