The little broadband engine that could, Mailboxes and interrupts

Uncover two means of communication between the SPE and the PPE -- mailboxes and signal notification.

From the developerWorks archives

Peter Seebach

Date archived: December 19, 2016 | First published: July 03, 2007

Meet two more means of communication between the SPE and the PPE -- mailboxes and signal notification. Mailboxes are special-purpose registers, similar to the I/O registers used to communicate with peripheral devices on some systems, available on the SPEs and the PPE. Signal notification registers are registers which can be read or written to by the PPE, but which the SPE can only read.

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