Chattanooga Software Center
Business Software Ready To Go

Business Software
made in America

Delivering Internet Based Systems Since 1996
Software Terms GlossaryX

Xmodem. An asynchronous file transfer protocol initially developed for CP/M personal computers. First versions used a checksum to detect errors. Later versions use the more effective CRC method. Programs typically include both methods and drop back to checksum if CRC is not present at the other end. Xmodem transmits 128 byte blocks. Xmodem-1K improves speed by transmitting 1024 byte blocks. Xmodem-1K-G transmits without acknowledgment [for error free channels or when modems are self correcting], but transmission is cancelled upon any error. Contrast with Kermit, Ymodem, Zmodem.



Back to Software Terms Glossary




 © 1996 -  Chattanooga Software Center. All Rights Reserved.
Privacy Policy | Terms Of Use | Contact Us | Home

Chattanooga Software Center, 3821 Saint Elmo Avenue, Chattanooga, Tennessee 37409, 423-821-3463