Dma hardware (8237 dmac)-microprocessor, Assembly Language

Assignment Help:

DMA Hardware (8237 DMAC) :

1263_8237.jpg

 

1)Processor contain HOLD/HOLD Acknowledge lines to interact with 8237

o   DMAC can achieve control of ISA bus by asserting HOLD

o   Processor acknowledges with HLDA

 

2)DRQ4 services slave controller Priorities are set as fixed

o   DRQ0 highest and DRQ7 lowest

o   It set at POST

o   It can be reprogrammed for rotating priority

 

3)ISA address/data/control  lines are also linked (not shown)

o   It can access control registers through ports

o   Each channel has a page register associated with   

 


Related Discussions:- Dma hardware (8237 dmac)-microprocessor

PIC MCU, CAN U GIVE BRIEF THEORY

CAN U GIVE BRIEF THEORY

Arithmetic instruction-microprocessor , Arithmetic Instruction :           ...

Arithmetic Instruction :               These instructions are usually perform the arithmetic operations, like subtraction ,multiplication, addition, and division along with th

Instruction formats-microprocessor, Instruction Formats A machine langu...

Instruction Formats A machine language instruction format has 1 or more number of fields linked with it. The first field is known as operation code field or op code field, whic

Program which allows the user to select from menu, Write a 32-bit program w...

Write a 32-bit program which when run, allows the user to select from a menu: (1)    Enter a Binary Number (2)    Enter a Decimal Number (3)    Enter a Hexadecimal Number

Cache memory-microprocessor, Cache Memory Caching is a technology based...

Cache Memory Caching is a technology based on the memory subsystem of any computer. The majoraim of a cache is to accelerate the computer while keeping the cost of the computer

8251 programmable/communication interface-microprocessor, 8251 Programmable...

8251 Programmable/Communication Interface As an instance of a serial interface device let us suppose Intel's 8251 A programmable communication interfaces. The 8251A is diagram

Xml, Write the structure of For…Next loop in VB.Net and also write a progra...

Write the structure of For…Next loop in VB.Net and also write a program to print integers from 1 to 10 on the console.

MIPS Assembly, Need help with 2 homework assignments

Need help with 2 homework assignments

The real time system (rts)-microprocessor, The real time System (RTS) : ...

The real time System (RTS) : Calling the clock real-time is somewhat of a misnomer because it only shows the time setting it has been given. The RTC is the other half of chip

Hi, i have a question.

i have a question.

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