IBM System/370 145 Reference Summary page 87

ADDRESS TRANSLATE PROCESS
Table Lookaside Buffer (TLB) Operation
Table Lookas1de Buffer Layout
Matched Against
PAA
W-Reg
Exp LS /
52 /
~
Virtual Address
VA from PAA"'
Real Address
RA from EBI
Reg No selected
by LAU
Dest Table
Active with
t
ROW DK WK, NOP
*See Routine or
in
Emul Mode
with ROH DK DC, 08
Virtual Address
8 9 10 11 12 13 14 15
I \;(_
~K
Page
Table Lookas1de Buffer
Match PAA/Table
Ext 2E
Select Reg
No with Sw H
Ext 08
Byte 3
Real Address ..,..__
~~~=d=~~~~. 1
8 9 10 11 12 13 14 15 SwH-0-7
I
I
If
\.:. 2K Page
~---------------------.•~
Gated to M-Reg
Upper Roll Bar
Pri-Key/Bytl' 0
Active Line
Set Horz
Ast Vert
11!
3
S1
R 2 A -
~
1 R13
Storage
D X/Y Storage
E Pri-Stack
C Read-out key
0 Set Ref Bit
D 7 3 If Store Cycle
E X/Y Set Change Bit
without Relocate
No Match Trap
D80C
Table Lo,ik Up
No Match MCKB
Byte 1 -
81t
4
"One Only"
Check
Cycle LAU
7.4
Display
A line 1s active 1f
1 Horz
=all
Os
2 Vert= all 1s
MCKB
Byte 1-Bit 6