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 modem?, A device, usually linked to a serial port of a computer, th...

A device, usually linked to a serial port of a computer, that transfer data over regular phone lines. Modem stands modulator demodulator; it changes a digital stream of data into s

Define the analysis that determines the meaning of statement, Analysis whic...

Analysis which determines the meaning of a statement once its grammatical structure becomes known is termed as? Ans. The meaning of a statement when its grammatical structure b

Explain the term thread scheduling, Problem: a) Most RMI and RPC system...

Problem: a) Most RMI and RPC systems expect to be supported by the "Request-Reply Protocol". Describe what "Request-Reply Protocol" is. b) Describe the invocation semantics

Computer graphics, source code for IMPLEMENTATION FOR ELECTROMAGNETIC INDUC...

source code for IMPLEMENTATION FOR ELECTROMAGNETIC INDUCTION

Single instruction and single data stream (sisd), Single Instruction and Si...

Single Instruction and Single Data stream (SISD) In this organisation, sequential implementation of instructions is executed by one CPU having a single processing element (PE

Pushbutton switches, Use the input capture to control the digital clock.  I...

Use the input capture to control the digital clock.  In this part, there will be two switches to control the clock, one is for starting the clock and one is for stopping the clock.

Can we run dot.net in unix platform, Can we run DOT.NET in UNIX platform? ...

Can we run DOT.NET in UNIX platform? One of the drawbacks of using Visual Studio.NET and the .NET framework to develop applications has been the lack of cross-platform support

How swapping increase overheads of the operating systems, Does swapping inc...

Does swapping increase the Operating Systems' overheads? Justify your answer. A process can be swapped out temporarily of memory to a backing store and after that brought back

Challenges facing operations managers - information systems, Challenges Fac...

Challenges Facing Operations Managers - Information Systems While information systems should be seen as tools that enable better performance their implementation also brings a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd