Illustrate header section of a device driver, Computer Engineering

Assignment Help:

Q. Illustrate Header section of a device driver?

Header comprises information which allows DOS to identify the driver. It also comprises pointers which allow it to chain to other drivers loaded into the system.

Header section of a device driver is 18 bytes in length and comprises pointers and name of the driver.

Following structure of the header:

CHAIN DD -1    : link to next driver

ATTR DW 0    : driver attribute

STRT DW START: address of strategy

INTER DW INT: address if interrupt

DNAME DB 'MYDRIVER': driver name.

The first double word comprises a -1 which informs DOS this is the last driver in chain. If extra drivers are added DOS inserts a chain address in this double word as the segment and offset address. Chain address points to the subsequent driver in the chain. This enables additional drivers installed at any time.

The attribute word signifies the type of headers included for driver and the type of device the driver installs. It also signifies whether the driver control a character driver or a block device.


Related Discussions:- Illustrate header section of a device driver

To show - hide the ssi document in the page, Step 1: Click on Edit Step ...

Step 1: Click on Edit Step 2: Select reference Step 3: Select Translation Step 4: Click on SSI Step 5: For showing the SSI file; choose one of the following options:

What is the semiconductor memory chip, What is the Semiconductor memory chi...

What is the Semiconductor memory chip A semiconductor memory chip comprises a large number of cells organized into an array and the logic necessary to access any array in the c

Determine the statement for array, Q. Determine the statement for array? ...

Q. Determine the statement for array? Determine the statement ALIGN A[i] WITH B[i] This statement aligns every A[i] with B[i] as displayed in Figure below. Figure

What are the limitations of a cyclotron, Q. What are the limitations of a c...

Q. What are the limitations of a cyclotron? Limitations (i) Maintaining a consistent magnetic field over a large area of the Dees is difficult. (ii) At high rapidity

Uneven load distribution in parallel computers, Q. Uneven Load Distribution...

Q. Uneven Load Distribution in parallel computers? In parallel computers the problem is split in sub-problems in addition is assigned for computation to several processors howe

Layered architecture of edi, Layered Architecture of EDI: EDI is most c...

Layered Architecture of EDI: EDI is most commonly applied in the implementation and settlement phases of the trade cycle. In implementation of a simple trade exchange, the cust

Define virtual memory, Normal 0 false false false EN-IN...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Electronic brokerage facilitate search and retrieval, How does electronic b...

How does electronic brokerage facilitate search and retrieval of information? E Brokerage facilitates search and retrieval of Information: The success aspect of a brokera

Explain the processor-memory interconnection network (pmin), Processor-Memo...

Processor-Memory Interconnection Network (PMIN): It's a switch which attaches several processors to distinct memory modules. Connecting each processor to every memory module in

Example multi-layer ann with sigmoid units, Example Multi-layer ANN with Si...

Example Multi-layer ANN with Sigmoid Units - Artificial intelligence: We will discuss ourselves here with ANNs containing only 1 hidden layer, as this makes describing the back

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