Texas Instruments MSP430x4xx - Manual (Page 160)

Hardware Multiplier Registers
7-7 Hardware Multiplier
7.3 Hardware Multiplier Registers
The hardware multiplier registers are listed in Table 7−4.
Table 7−4. Hardware Multiplier Registers
Register Short Form Register Type Address Initial State
Operand one - multiply MPY Read/write 0130h Unchanged
Operand one - signed multiply MPYS Read/write 0132h Unchanged
Operand one - multiply accumulate MAC Read/write 0134h Unchanged
Operand one - signed multiply accumulate MACS Read/write 0136h Unchanged
Operand two OP2 Read/write 0138h Unchanged
Result low word RESLO Read/write 013Ah Undefined
Result high word RESHI Read/write 013Ch Undefined
Sum Extension register SUMEXT Read 013Eh Undefined