The xpat program tests the random number generator used by datagen in X Windows. The screen should look like it is changing evenly across the entire screen.
An alternate version of xpat is called xrealpat. xrealpat uses real numbers to calculate the address on the screen, whereas xpat uses integers. Although integers are faster to generate, both methods are included to demonstrate the random number generator. The discussion below applies equally well to both xpat and xrealpat.
The speed of xpat is limited by the speed of X Windows. xpat uses about 55 percent of the CPU, while it is waiting for responses from X Windows.
The syntax for xpat is:
xpat
Press r to reset the screen.
Press q to quit.
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Job and Record Level Definitions
Field Level Definitions
Datagen Syntax
Supporting Routines
FAQ
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