Execute Direct Access Program and Start Input/Output

Shortcuts: Differences, Similarities, Jaccard Similarity Coefficient, References.

Difference between Execute Direct Access Program and Start Input/Output

Execute Direct Access Program vs. Start Input/Output

In IBM mainframe operating systems, Execute Direct Access Program (XDAP) is a pseudo access method for accessing direct access datasets on a block by block basis. In MVS/370 and successor versions of IBM mainframe operating systems, Start Input/Output (STARTIO) is a macro instruction and a "branch entry" for low-level device access, where the programmer is responsible for providing a list of device-specific CCWs, that is, a channel program, to be executed by I/O channels, control units and devices and a number of "exits", several of which may be immediate returns to the Input/Output Supervisor (IOS).

Similarities between Execute Direct Access Program and Start Input/Output

Execute Direct Access Program and Start Input/Output have 3 things in common (in Unionpedia): Execute Channel Program, IBM mainframe, Operating system.

Execute Channel Program

In IBM mainframe operating systems, Execute Channel Program (EXCP) is a macro generating a system call, implemented as a Supervisor Call instruction, for low-level device access, where the programmer is responsible for providing a channel program—a list of device-specific commands (CCWs)—to be executed by I/O channels, control units and devices.

Execute Channel Program and Execute Direct Access Program · Execute Channel Program and Start Input/Output · See more »

IBM mainframe

IBM mainframes are large computer systems produced by IBM since 1952.

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs.

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The list above answers the following questions

What Execute Direct Access Program and Start Input/Output have in common
What are the similarities between Execute Direct Access Program and Start Input/Output

Execute Direct Access Program and Start Input/Output Comparison

Execute Direct Access Program has 3 relations, while Start Input/Output has 16. As they have in common 3, the Jaccard index is 15.79% = 3 / (3 + 16).

References

This article shows the relationship between Execute Direct Access Program and Start Input/Output. To access each article from which the information was extracted, please visit:

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