Lexmark Forms Printer 4227 Plus User Manual page 28

Feature
Code Pages
Software
Compatibility
Interface
Connection
AutoGap
Automatic
Interface
Switching
22
Chapter 2: Features and Functions
Function
Your printer supports the following code pages: 437, 437G, 813,
850, 851, 853T, 857, 858, 860, 861, 863, 865, 869, 920, 1004, and
1053.
Compatible with all IBM and IBM-compatible computers.
For Parallel, RS-422, and RS-232 cables
When AutoGap is set to On (default), the printer automatically
adjusts to the thickness of the paper you are using.
When the interface option is set to "Auto," the printer knows
which interface is active, parallel or serial. You do not need to
change menu items from the operator panel, and you can
effortlessly share your printer among multiple environments.