IBM AT 5170 Technical Reference page 387

STR
=
Store Task Register to Register/Memory
I
00001111
I
00000000
I
modOOl
rim
LMSW
=
Load Machine Status Word from Register/Memory
I
00001111
I
00000001
I
modll0
rim
SMSW
=
Store Machine Status Word
I
00001111
I
00000001
I
modl00
rim
LAR
=
Load Access Rights from Register/Memory
I
00001111
I
00000010
I
mod reg
rim
LSL
=
Load Segment Limit from Register/Memory
I
00001111
I
00000011
I
mod reg
rim
ARPL
=
Adjust Requested Privilege Level from Register/Memory
I
01100011
I
mod reg
rim
VERR
=
Verify Read Access; Register/Memory
I
00001111
I
00000000
modl00
rim
VERR
=
Verify Write Access
00001111 00000000
modl0l
rim
Instruction Set 6-19