Level -2 Halsall Fred creator ELBS Hutchinson 1982 190 p illus 24 cm Digital Computer Principles (Page-9), Microcomputers (Page-28), Microcomputer architecture (Page-28), Microprocessor (Page-41), Arithmetic and Logic Instrumentations (Page-61), Transfer and Control (Page-89), I/O instruction and associated programming (Page-111), Microcomputer hardware (Page-141). Fred Halsall Halsall Fred Microelectronic systems Level -2 621.381,HAC 0091654114 20221118104248.0