=> R0 = file handle, or 0 to suspend current job
R1 = pointer to title string for job, or 0 if none
<= R0 = file handle of previously active job
This SWI starts a new print job, resumes a suspended one, or suspends the current one. The title must only contain characters in the range 32-126, and is terminated by the first out of range character.
If an error occurs the previously selected job will automatically be restored as current job.
See PRM 3, page 613.
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