Protection Control - IBM 5170 Technical Reference

Processor Extension Escape
10011TTT
I
modLLLr/m
Protection Control
LGDT
=
Load Global Descriptor Table Register
00001111
SGDT
=
Store Global Descriptor Table Register
Store Global Descriptor Table Register
I
00001111
I
00000001
I
modOOO
rim
LIDT
=
Load Interrupt Descriptor Table Register
Load Interrupt Descriptor Table Register
I
00001111
I
00000001
I
mod011
rim
SIDT
=
Store Interrupt Descriptor Table Register
Store Interrupt Descriptor Table Register
I
00001111
I
00000001
I
mod001
rim
LLDT
=
Load Local Descriptor Table Register from Register
Memory
SLDT
=
Store Local Descriptor Table Register from Register
Memory
Store Local Descriptor Table Register from Register Memory
I
00001111
I
00000000
I
modOOO
rim
LTR
=
Load Task Register from Register Memory
Load Task Register from Register Memory
I
00001111
I
00000000
I
mod011
rim
Instruction Set 6-21