A microprocessor-based system is used to transfer 8-bytes of data beginning from memory location 1070011 to port B of 8255 PPI each time an interrupt requests signal transition from 0 to 1. The interrupt type 50H is generated by using 74244 tri state buffer. (a) Design the circuit with the following addresses: control register of 8255-93H and port B-91H. (b) Write an 8088 program to drive the circuit assuming that CS-DS-1000H, SS-4000H, Main program offset is 200H, Interrupt service routine code segment is 2000H, Interrupt-service routine offset is 1000H, and the stack has an offset of 500H from the current stack segment.

A microprocessor-based system is used to transfer 8-bytes of data beginning from memory location 1070011 to port B of 8255 PPI each time an interrupt requests signal transition from 0 to 1. The interrupt type 50H is generated by using 74244 tri state buffer. (a) Design the circuit with the following addresses: control register of 8255-93H and port B-91H. (b) Write an 8088 program to drive the circuit assuming that CS-DS-1000H, SS-4000H, Main program offset is 200H, Interrupt service routine code segment is 2000H, Interrupt-service routine offset is 1000H, and the stack has an offset of 500H from the current stack segment.

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...

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