Associate DesignWorks with the PCB file extension. If the user already has one of the applications installed, the next step will be to associate it with the file extension PCB.This can be done. How to open a.PCB file? Execute.PCB file by double-clicking on it. If you have already installed the software to open it and the files associations are set up correctly,.PCB file will be opened. If Windows keeps asking you what program should be used to open the file, the problem is most possibly caused by broken files associations. Damaged file associations occur as a result of Windows registry errors. To fix these issues, please follow the steps below. Fix.PCB file association errors.

A process control block (PCB) is a data structure used by computer operating systems to store all the information about a process. It is also known as a process descriptor.

• When a process is created (initialized or installed), the operating system creates a corresponding process control block.
• Information in a process control block is updated during the transition of process states.
• When the process terminates, its PCB is returned to the pool from which new PCBs are drawn.
• Each process has a single PCB.

Role[edit]

The role of the PCBs is central in process management: they are accessed and/or modified by most utilities, particularly those involved with scheduling and resource management.

Structure[edit]

In multitasking operating systems, the PCB stores data needed for correct and efficient process management.^[1] Though the details of these structures are system-dependent, common elements fall in three main categories:

• Process identification
• Process state
• Process control

Status tables exist for each relevant entity, like describing memory, I/O devices, files and processes.

Memory tables, for example, contain information about the allocation of main and secondary (virtual) memory for each process, authorization attributes for accessing memory areas shared among different processes, etc. I/O tables may have entries stating the availability of a device or its assignment to a process, the status of I/O operations, the location of memory buffers used for them, etc.

Process identification data include a unique identifier for the process (almost invariably an integer) and, in a multiuser-multitasking system, data such as the identifier of the parent process, user identifier, user group identifier, etc. The process id is particularly relevant since it is often used to cross-reference the tables defined above, e.g. showing which process is using which I/O devices, or memory areas.

Process state data define the status of a process when it is suspended, allowing the OS to restart it later. This always includes the content of general-purpose CPU registers, the CPU process status word, stack and frame pointers, etc. During context switch, the running process is stopped and another process runs. The kernel must stop the execution of the running process, copy out the values in hardware registers to its PCB, and update the hardware registers with the values from the PCB of the new process.

Process control information is used by the OS to manage the process itself. This includes:

• Process scheduling state–The state of the process in terms of 'ready', 'suspended', etc., and other scheduling information as well, such as priority value, the amount of time elapsed since the process gained control of the CPU or since it was suspended. Also, in case of a suspended process, event identification data must be recorded for the event the process is waiting for.
• Process structuring information–the process's children id's, or the id's of other processes related to the current one in some functional way, which may be represented as a queue, a ring or other data structures
• Interprocess communication information–flags, signals and messages associated with the communication among independent processes
• Process Privileges–allowed/disallowed access to system resources
• Process State–new, ready, running, waiting, dead
• Process Number (PID)–unique identification number for each process (also known as Process ID)
• Program Counter (PC)–A pointer to the address of the next instruction to be executed for this process
• CPU Registers–Register set where process needs to be stored for execution for running state
• CPU Scheduling Information–information scheduling CPU time
• Memory Management Information–page table, memory limits, segment table
• Accounting Information–amount of CPU used for process execution, time limits, execution ID etc.
• I/O Status Information–list of I/O devices allocated to the process.

Location[edit]

PCB must be kept in an area of memory protected from normal process access. In some operating systems the PCB is placed at the beginning of the kernel stack of the process.^[2]

See also[edit]

• Thread control block (TCB)
• Program segment prefix (PSP)

Notes[edit]

1. ^Gagne, Abraham Silberschatz, Peter Baer Galvin, Greg (2013). Operating system concepts (9th ed.). Hoboken, N.J.: Wiley. pp. 107–108. ISBN9781118063330.
2. ^Yong, Zhang, 'Breaking through the Maximum Process Number', 'Linux Journal', 1 January 2004, [1].

Are you having difficulty opening a file that ends with .PCB? Such files can be executed only by certain programs. If you cannot open the .PCB file, it can be due to the following reasons: either you do not have an appropriate program to open it, or your file association is corrupted. For more information about this extension, please read the article below. To fix the problem, please use a special File Association Fix Tool (recommended): download here or click the green button Fix .PCB Errors located in the right block. You can also call the support service via the phone number you see on this page to get assisted help from the experts.

What is a .PCB file?

Open Pcb File In Powerpoint

.PCB file belongs to the category of Data Files used in operating systems such as Windows 10, Windows 7, Windows 8 / 8.1, Windows Vista, Windows XP.

How To Open Pcb File

.PCB file is associated with Printed Circuit Board Design File developed by N/A, has a N/A Format and belongs to Data Files category.

How to open a .PCB file?

Execute .PCB file by double-clicking on it. If you have already installed the software to open it and the files associations are set up correctly, .PCB file will be opened. If Windows keeps asking you what program should be used to open the file, the problem is most possibly caused by broken files associations.

Open Pcb

Damaged file associations occur as a result of Windows registry errors. To fix these issues, please follow the steps below.

Fix .PCB file association errors

To quickly and automatically fix the problem, please proceed as follows:

• Step 1: Click on Download Fix Tool to download the automatic repair tool
• Step 2: Click Start Scan to identify all potential issues.
• Step 3: Review scan results and click Fix Items.

File Size: 2.8 MB, Download time: < 1 min. on DSL/ADSL/Cable

This tool is compatible with: Windows XP, Windows Vista, Windows 7, Windows 8/8.1, Windows 10

Warning

We do not recommend trying to fix the problem manually if you do not have sufficient computer knowledge. It is recommended to use automatic tools or address field experts.