8086 Addressing Modes: We have seen how the 8086 fetches code bytes from memory by generating 20-bit physical address with the help of IP and CS. We have also seen how the 8086 accesses the…
Internal Architecture of 8086: Fig. 6.2 shows a block diagram of Internal Architecture of 8086. It is internally divided into two separate functional units. These are the Bus Interface Unit (BIU) and the Execution Unit…
Features of 8086 Microprocessor: The features of 8086 Microprocessor are : 1.The 8086 is a 16-bit microprocessor. The term "16-bit" means that its arithmetic logic unit, internal registers and most of its instructions are designed…
Types of Interrupts in 8085: The 8085 has multilevel interrupt system. It supports two Types of Interrupts in 8085: Hardware    Software Hardware : Some pins on the 8085 allow, peripheral device to interrupt the main…
Polling and Interrupts: In Polling and Interrupts of the microprocessor's software simply checks each of the I/O devices every so often. During this check, the microprocessor tests to see if any device needs servicing. Fig.…
Input Output Transfer Techniques: In Input Output Transfer Techniques, the system requires the transfer of data between external circuitry and the microprocessor. In this section, we will discuss different ways of I/O transfer. Program controlled…
Input Output Interfacing Techniques: The most of the microprocessors support isolated I/O system. It partitions memory from I/O, via software, by having instructions that specifically access (address) memory, and others that specifically access I/O. When…
Input Output Interfacing 8085 Microprocessor: Any application of a microprocessor based system requires the transfer of data between external circuitry to the microprocessor and microprocessor to the external circuitry. User can give information to the…
Memory Interfacing in 8085: Memory is an integral part of a microprocessor system, and in this section, we will discuss how to interface a memory device with the microprocessor. The Memory Interfacing in 8085 is…
8085 Clock Circuit: The 8085 has on chip clock generator. Fig. 4.1 shows the internal block diagram of the on chip clock generator. The internal clock generator requires tuned circuit like LC, RC or crystal,…
