Imem; Addressing; Explicitly Managed - Nintendo Ultra64 Programmer's Manual

Revision 1.0

IMEM

IMEM
The RSP has 4K bytes (1K instructions) of instruction memory (IMEM).

Addressing

The RSP PC is only 12-bits; only the lowest 12-bits of any address or branch
target are used. Other address bits are ignored.

Explicitly Managed

IMEM must be explicitly managed by the RSP program. IMEM contents can
only be loaded with a DMA operation (or programmed IO write from the
CPU).
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