Nintendo Ultra64 Programmer's Manual page 184

LHU
31
LHU
1 0 0 1 0 1
Format:
lhu rt, offset(base)
Description:
The 16-bit
DMEM address. The contents of the halfword at the DMEM location specified by the effective
address are zero-extended and loaded into general register
Since DMEM is only 4K bytes, only the lower 12 bits of the effective address are used.
Operation:

T:
Addr ((offset
GPR[rt]
Exceptions:
None
184
Load Halfword Unsigned
26 25 21
base
6 5
offset
is sign-extended and added to the contents of general register
16
) || offset
15
 (0
16
|| dmem[Addr
31...0
20 16 15
rt
5
) + GPR[base]
15...0
] )
11...0 15..0
LHU
offset
16
base
rt
.
0
to form a