This document contains known considerations for running Microsoft Windows NT 4.0 on your ThinkPad A21e system (Type 2655).

• Multifunction PC cards, boot from PC card HDDs, and ZV cards are not supported with Windows NT 4.0.
• ZV cards are not supported.
• When using an IBM PC token-ring card, use the token-ring device driver IBM provides, not the Microsoft PC Card token-ring driver.
• SDLC modem PC Card is not supported on Windows NT 4.0 but is supported on Windows 2000 with PCOMM Version 5. (Japan only)