An introduction to microprocessors, updated to cover recent models. Designed as a first course in microcomputers, this new edition covers the hardware and machine language software of the 8080/8085 and Z-80 8-bit microprocessors. It explores various aspects of microcomputer technology using examples of 8080/8085 and Z-80 applications.

Lynley Dodd's iconic first Hairy Maclary book, which introduces the famous Hairy Maclary from Donaldson's Dairy and his canine gang. Out of the gate and off for a walk went Hairy Maclary from Donaldson's Dairy Hairy Maclary's friends join him for a walk until, with a sudden yowl, a wail and a howl, they all run off. What could have caused such a scatter of paws? Read all the Hairy Maclary and Friends books by Lynley Dodd! www.hairymaclary.com

Drawing on recent research in the Sudan, Ivory Coast, Kenya and Tanzania, the contributing authors analyze broad patterns of social and political change brought about by the rapidly increasingly use of microcomputer technology in Africa.

Work practices and organizational processes vary widely and evolve constantly. The technological infrastructure has to follow, allowing or even supporting these changes. Traditional approaches to software engineering reach their limits whenever the full spectrum of user requirements cannot be anticipated or the frequency of changes makes software reengineering cycles too clumsy to address all the needs of a specific field of application. Moreover, the increasing importance of ‘infrastructural’ aspects, particularly the mutual dependencies between technologies, usages, and domain competencies, calls for a differentiation of roles beyond the classical user–designer dichotomy. End user development (EUD) addresses these issues by offering lightweight, use-time support which allows users to configure, adapt, and evolve their software by themselves. EUD is understood as a set of methods, techniques, and tools that allow users of software systems who are acting as non-professional software developers to 1 create, modify, or extend a software artifact. While programming activities by non-professional actors are an essential focus, EUD also investigates related activities such as collective understanding and sense-making of use problems and solutions, the interaction among end users with regard to the introduction and diffusion of new configurations, or delegation patterns that may also partly involve professional designers.

Principles and Applications of Microcomputers is a comprehensive textbook, which exemplifies the fundamental principles and applications of microcomputers with the most popular 8051 microcontroller and the Keil C51-MDK (microcomputer development kit). After reading this book, you will be able to design various microprocessor- or microcomputer-based application systems. The main features of this book are as follows: -- Partition the MCS-51 instruction set into many pedagogic groups suitable for entry-level readers and then illustrate them with an abundant number of examples. -- Introduce MCS-51 C programming with most popular topics and then balance the programming of assembly-language and C programs in the design of MCS-51 microcontroller applications. -- Divide the MCS-51 system into the software model and the hardware model. The software model is first introduced and then the hardware model follows. This way greatly facilitates the reader to study a microcomputer system. -- Discuss in detail features and applications of SRAM and Flash. The design of memory modules and the timing consideration related to the MCS-51 are also involved. -- Deal with the interrupt handling, system reset, and watchdog, as well as power control and management of the MCS-51 system. -- Detail I/O concepts and structures, serial/parallel data transfer and control, and ADC/DAC circuits, as well the structures and features of MCS-51 I/O ports, including serial port, SPI, and I2C. Besides, various timers/counters are dealt with in depth. -- Address the structures, functions, and applications of various timers/counters and programmable timers. -- Involve design principles of keyboards circuits, including both polling and interrupt methods, as well as circuit modules and applications of LED and LCD displays. -- Provide an abundance of review questions to each section to help readers evaluate their understandings about the topics introduced in the section. This book can be used as the textbook for the following courses and others: Assembly-Language Programming, Fundamental Principles of Microcomputers, or Principles and Applications of Microcomputers.

Originally published in 1989, this book differed from others on the topic of microcomputers and education at the time, in that it focuses on the influence that microcomputer technology has on children in their early years, specially pre-school and elementary ages. Microcomputers have the capacity to do great harm as well as good and a full explanation of the technical and philosophical issues involved will be of interest to a number of disciplines. Other topics explored are – the potential uses of microcomputer-technology in early childhood education and current research and theory building on microcomputers and early education. This book should be read by teachers, sociologists, psychologists and researchers in education.