Exec loader error.  Exec aborted.$  Stack overflow during arg parsing
$Incompatible DOS version
$Invalid stack size
$Insufficient memory
$Corrupted environment
$Insufficient memory for specified heap size

Ultima I requires a Color Graphics Adapter.

Not enough memory.
Please insert the ULTIMA I disk...                                     
Ultima I The First Age of Darkness Copyright (C) 1987 Origin Systems, Inc.   
ULTIMA and LORD BRITISH are registered trademarks of Richard Garriott and Origin Systems, Inc. 
Conversion by: John Fachini 
gen.exe 
Insert ULTIMA I disk and press RETURN                                        
castle.4 rb castle.16             
...a new release of the best    
selling personal computer    
role-playing adventure... 
...Lord British's original    
fantasy masterpiece... 
Presents...