Category: 8085 INTERRUPTS

Types of 8085 Interrupts

Types of 8085 Interrupts: The 8085 has multilevel interrupt system. It supports two Types of 8085 Interrupts: Hardware     Software Hardware : Some pins on the 8085 allow, peripheral device to interrupt the main program for I/O operations. When an interrupt occurs, the 8085 completes the instruction it is currently executing and transfers the program control […]

Polling and Interrupts

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. 5.1 shows the flow chart for polling subroutine. This is a simple program which services I/O ports A, B, and […]