half-word I/O buffer

half-word I/O buffer

[′haf ‚wərd ¦ī ¦ō ‚bəf·ər]
(computer science)
A buffer, the upper half being used to store the upper half of a word for both input and output characters, the lower half of the buffer being used for purposes such as the storage of constants.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.