SMSW
Usage: SMSW dest Modifies flags: none
Store Machine Status Word (MSW) into 'dest'.
Store Machine Status Word
SMSW r/m16 ; 0F 01 /4 [286,PRIV]
SMSW stores the bottom half of the CR0 control register (or the Machine Status Word, on 286 processors) into the destination operand. See also LMSW.
For 32-bit code, this would use the low 16-bits of the specified register (or a 16bit memory location), without needing an operand size override byte.
Example:
smsw Label