Write 8086 initialisation routine required to program 8255, Computer Engineering

Assignment Help:

Write 8086 initialisation routine required to program 8255 for mode 1 with Port A and Port B as output Ports and Port C as an input port. Indicate all the relevant signals.

A, B can only change 1 byte at a time
C has individual bit set/reset capability
The Advantage is that non-dedicated circuit can change port configuration with software and no 'glue logic'.
Ports A, B, and C are used for I/O data.
Control register is programmed to select the operation mode of the three ports A, B, and C.
Mode0: simple I/O mode
Any of the ports A, B, CL and CU can be programmed as input or output.
No control of individual bits (all bits are out or all bits are in)

Related Discussions:- Write 8086 initialisation routine required to program 8255

Produce an analysis model of the proposed system, Question: Read the fo...

Question: Read the following case study and answer the questions based on it. The local airline company needs to develop a system for controlling air traffic at the airport

Input-output-processor interconnection network (iopin), Input-Output-Proces...

Input-Output-Processor Interconnection Network (IOPIN) This interconnection network is used for communication between I/O channels and processors. All processors commune with a

Instruction set of risc, how to reduce risc pipelining structure

how to reduce risc pipelining structure

Ending transactions - data phase, Ending transactions: Either side may...

Ending transactions: Either side may request that a burst end after the present data phase. Simple PCI component that do not support multi-word bursts will always request this

Give the solutions for critical section problem, Give the solutions for cri...

Give the solutions for critical section problem? A solution to the critical section problem must specify the subsequent requirements. (a) Mutual exclusion (b) Progress (c)

Interrupts - computer architecture, Interrupts Interrupt-request lin...

Interrupts Interrupt-request line o Interrupt-acknowledge signal o Interrupt-request signal Interrupt-service routine o May have no relationship t

Memory, #all type of memory

#all type of memory

What is bus arbitration, What is bus arbitration? It is method by which...

What is bus arbitration? It is method by which the next device to become the bus master is selected and bus mastership is transferred to it. There are two ways for doing this:

Average waiting time, Customer arrivals at a gas station can be characteriz...

Customer arrivals at a gas station can be characterized by exponential distribution with mean of 10 minutes. The amount of time they take to pump gas can be characterized by an ex

What are the main features of uml, What are the main features of UML ...

What are the main features of UML Defined system structure for the object modelling Support for all different model organization Strong modelling for behaviour an

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages