world at a GlanCE

1.System Software and Machine Architecture The Simplified Instructional Computer (SIC) Traditional (CISC) Machines Complex Instruction Set Computers RISC Machines Reduced Instruction Set Computers 2.System Software vs. Machine Architecture Machine dependent The most important characteristic in which most system software differ from application software e.g. assembler translate mnemonic instructions into machine code e.g. compilers must generate machine language code Machine independent There are aspects of system software that do not directly depend upon the type of computing system e.g. general design and logic of an assembler e.g. code optimization techniques 3.The Simplified Instructional Computer (SIC) SIC is a hypothetical computer that includes the hardware features most often found on real machines Two versions of SIC standard model extension version 4.SIC Machine Architecture (1/5) Memory 215 bytes in the computer memory 3 consecutive bytes form a word 8-bit bytes Registers mn...

Unit – I Introduction Objective To Understand the definition and importance of User Interface Design To know about the concept, advantages and applications of GUI and Web interface User Interface Design Definition • User interface design is a subset of a field of study called human-computer interaction (HCI). Human-computer interaction is the study, planning, and design of how people and computers work together so that a person’s needs are satisfied in the most effective way. • The user interface is the part of a computer and its software that people can see, hear, touch, talk to, or otherwise understand or direct. The user interface has essentially two components: input and output. • Input is how people communicate his needs to the system using keyboard or any pointing device and output is how the system returns processing result to user through screen or sound. • The best interface is one which has proper design with combination of effective input and output mechanisms. Importance of...