AMD-K6 Datasheet, PDF (64/346 Pages) Advanced Micro Devices – AMD-K6 Processor

AMD-K6^® Processor Data Sheet
Preliminary Information
20695H/0—March 1998
Reserved
Symbol
G
D
AVL
P
DPL
DT
Type
Description
Granularity
32-Bit/16-Bit
Available to Software
Present/Valid Bit
Descriptor Privilege Level
Descriptor Type
See Table 7
Bits
23
22
20
15
14-13
12
11-8
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Base Address 31–24
A
GD
V ^{Segment P DPL 1}
Type
L
Limit
Base Address 23–16
Base Address 15–0
Segment Limit 15–0
Figure 40. Application Segment Descriptor
Table 7. Application Segment Types
Type Data/Code
Description
0
Read-Only
1
Read-Only — Accessed
2
Read/Write
3
Read/Write — Accessed
Data
4
Read-Only — Expand-down
5
Read-Only—Expand-down, Accessed
6
Read/Write — Expand-down
7
Read/Write—Expand-down, Accessed
8
Execute-Only
9
Execute- Only — Accessed
A
Execute/Read
B
Execute/Read — Accessed
Code
C
Execute- Only — Conforming
D
Execute-Only—Conforming, Accessed
E
Execute/Read-Only — Conforming
F
Execute/Read-Only—Conforming, Accessed
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Software Environment
Chapter 3