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April 25, 2012

Mainframe Computers – Current Developments

Filed under: System Programming — Tags: , , , — admin @ 10:35 pm

I am sure that you might have heard about mainframes and the career prospects they offer. Do you know about the specialty of mainframes? Mainframes are very large computers mainly used for running mission critical and complex applications involved in activities like bulk data processing, financial transactions etc.

The huge servers are capable of supporting immense number of applications and input/output devices to simultaneously serve any number of users by the partitioning of resources. That is, it serves as a centralized depository of data which is connected to the users through work stations or terminals.

The origin of the mainframe can be traced back to the 1950′s which saw the emergence of the IBM 700/7000 series. Since then there has been a series of products evolving to accommodate the user requirements. Some of the initial drawbacks of mainframe that had been pointed were the lack of flexibility and the high cost.

Thus the IBM came up with the highly flexible IBM system/360 which used microcode to implement the machine instructions. The last in the spectrum is the Z series, introduced in the 2000s, equipped with massive scalability, better security and resiliency, intelligent workload management and business integration on a virtualized platform.

So many speculations were made about the future of the mainframes so far. The truth is that they will not become obsolete for a reasonably long time. The markets see an ever-time improvement in the sale of mainframes and boom in the training. This is because mainframes are still unsurpassable in their reliability and stability in processing information. No technology might have undergone such a lot of evolutionary changes as mainframes had.

They win over their competitors by the continuous evolution of their architecture to meet the demands of the user network at the same time maintaining compatibility with the existing applications.

System Z9, the latest in the series, has double the processing power and capacity, memory, MIPS and number of partitions than its predecessor. Virtualization technology enables the Z servers to run mixed workloads. Z/OS uses multiprocessing and multiprogramming for large-scale data management and I/O operations.

Read more about mainframes, the latest developments and their features.

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April 18, 2012

BNSF Mainframe Emulator – General Usage Instructions

Filed under: System Programming — Tags: , , , , , — admin @ 3:36 pm

Logging In

Click the “Start Emulator” button on the main page

At the prompt, enter your user ID and password and click OK

If your ID and password are correct

- the BNSF Emulator Java applet will start

If your ID and Password are incorrect

- you will be requested to re-enter them and try again

Once Emulator Has Started

Proceed as though on a normal mainframe terminal or emulation

If you see a CICS logon screen instead of the standard BNSF VTAM greeting screen, click the Clear button and type “cesf logoff” and press the “Enter” key to return to the greeting screen.

To start additional Emulators, click the “New Default 3270 Session” button (visible in the browser screen) or select New from the Emulator File menu

To quit the Emulator, logoff the mainframe normally, then select Exit from the Emulator File menu

Printing

To print the content of the emulator screen, select Print Screen from the File menu.

The system Print Dialog will appear. From this dialog, start the print job as you normally would from any other application. (i.e. Click the OK button)

Alternate Printing Method

If the Print Screen menu item is disabled, you will have to print using another method.

First you must copy an image of the screen (ALT+Print Screen) and then Paste that image into an application that will print. This will be a true copy of what you see on the emulator. The image will have a black background which may be hard to read when printed

All Emulators for Mac

Pierre is addicted to computer games. He is working as a game tester and game analyzer. His company only produces game productions for mobile phones and PCs.

 

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