00475pamaa2200157 4500 0000000428 20091027090000.0 0130306851 004.16 BYR QA76.5 BYR 1993 BYRD Microcomputer systems : architecture and programming Joseph S. Byrd, Robert O. Pettus. Englewood Cliffs, N.J.: Prentice Hall, 1993. XVi, 448p.: ill.; 24cm. Microcomputers Pettus, Robert O.