Tony, Allison, Roger: Thanks for the quick tutorial on microcode. I knew that it was an involved topic worthy of many hundreds of pages of text, but you did a great job of giving me a thumbnail of the topic. Tony, thanks for the book refs. I'll try to track some of them down. Rich Cini/WUGNET <nospam_rcini(a)msn.com> (remove nospam_ to use) ClubWin! Charter Member (6) MCP Windows 95/Windows Networking ============================================