AMD-K6-2E Datasheet, PDF (72/332 Pages) Advanced Micro Devices – AMD-K6™-2E Embedded Processor

AMD-K6™-2E Processor Data Sheet
Preliminary Information
22529B/0—January 2000
Reserved
Symbol
G
X
AVL
P
DPL
DT
Type
Description
Granularity
Not Needed
Availability to Software
Present/Valid Bit
Descriptor Privilege Level
Descriptor Type
See Table 10
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
GX
V ^{Segment P DPL 0}
Type
L
Limit
Base Address 23–16
Base Address 15–0
Segment Limit 15–0
Figure 48. System Segment Descriptor
Table 10. System Segment and Gate Types
Type Description
0 Reserved
1 Available 16-bit TSS
2 LDT
3 Busy 16-bit TSS
4 16-bit Call Gate
5 Task Gate
6 16-bit Interrupt Gate
7 16-bit Trap Gate
8 Reserved
9 Available 32-bit TSS
A Reserved
B Busy 32-bit TSS
C 32-bit Call Gate
D Reserved
E 32-bit Interrupt Gate
F 32-bit Trap Gate
54
Software Environment
Chapter 3