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{{hwstub}}
{{hwstub}}
+{| border="1"
+! base !! function !! offset !! description !! contents/example
+|-
+||0x0D800000||IPC|||| reg 0: request pointer || To make an IOS request, the physical address of an IOS command struct is written here by the Broadway. Then, Broadway sets bit 0 of IPC reg 1 to indicate a request is ready.
+|-
+||0x0D800004||IPC|||| reg 1: semaphore flags || Broadway sets bits here as "doorbells" to indicate status; Starlet responds by setting flags here.
+|-
+||0x0D800008||IPC|||| reg 2: Reply pointer || When an IOS request has completed, IOS will modify the original command struct passed in IPC reg 0, copy that pointer to reg 2, then set reg 1 to 0x14 to indicate a reply is ready.
+|-
+|}