.I /mbox
The first SPU-to-CPU communication mailbox.
This file is read-only and can be read in units of 4 bytes.
-The file can only be used in nonblocking mode \- even
+The file can be used only in nonblocking mode \- even
.BR poll (2)
cannot be used to block on this file.
The only possible operation on an open
.RS
.TP 16
.I npc
-Next Program Counter \- only valid when the SPU is in a stopped state.
+Next Program Counter \- valid only when the SPU is in a stopped state.
.TP
.I decr
SPU Decrementer