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

What is a cooperation model, What is A cooperation model A cooperation ...

What is A cooperation model A cooperation model defines the way interdependencies are established by cooperative interactions. We recognize two basic roles services can play: c

Array user interface, You were offered bonus marks for separating the user ...

You were offered bonus marks for separating the user interface code from the main logic of your program. This design choice makes it very easy to replace the user interface without

Explain the advantages of object oriented analysis design, Advantages of Ob...

Advantages of Object oriented analysis design The OO approach inherently makes every object a standalone component which can be reused within specific stat problem domains we

Computer graphics, what is boundary filling explain with example

what is boundary filling explain with example

What is macro, A series of keystrokes and mouse clicks that can be abbrevia...

A series of keystrokes and mouse clicks that can be abbreviated into a one keystroke or mouse click.

Qwerty - keyboard layout, Q. QWERTY - Keyboard Layout ? A keyboard layo...

Q. QWERTY - Keyboard Layout ? A keyboard layout is arrangement of keys across the keyboard. There is one keyboard layout which anybody who has worked on a standard keyboard or

What are the standard types of files produced, What are the standard types ...

What are the standard types of files produced? A PDF file is universally recognized by the internet and is also a secure image, given that an electronic footprint remains when

Illustrate working of t flip-flop, Q. Illustrate working of T Flip-Flop? ...

Q. Illustrate working of T Flip-Flop? T (Toggle) flip-flop is attained from JK flip-flop by combining inputs J and K together. The implementation of T flip-flop is displayed in

Arrays, how to calculate students''s averange test scores

how to calculate students''s averange test scores

Non-uniform memory access model (numa), Non-Uniform Memory Access Model (NU...

Non-Uniform Memory Access Model (NUMA) In shared memory multiprocessor systems, local memories can be joined with every processor. The group of every local memories form the gl

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages