G1-300B-85-2.0
| Model | G1-300B-85-2.0 |
| Description | Processor Series Low Power Integrated x86 Solution |
| PDF file | Total 247 pages (File size: 4M) |
| Chip Manufacturer | NSC |
Geode™ GX1 Processor Series
Processor Programming
(Continued)
Table 3-23. Application and System Segment Descriptors TYPE Bit Definitions
TYPE
Bits [11:8]
Num
0
1
2
3
4
5
6
7
Num
8
9
A
B
C
D
E
F
SEWA
0000
0001
0010
0011
0100
0101
0110
0111
SCRA
1000
1001
1010
1011
1100
1101
1110
1111
Reserved
Available 32-Bit TSS
Reserved
Busy 32-Bit TSS
32-Bit Call Gate
Reserved
32-Bit Interrupt Gate
32-Bit Trap Gate
S = Code Segment (not Data Segment)
E = Expand Down
W = Write Enable
A = Accessed
C = Conforming Code Segment
R = Read Enable
Reserved
Available 16-Bit TSS
LDT
Busy 16-Bit TSS
16-Bit Call Gate
Task Gate
16-Bit Interrupt Gate
16-Bit Trap Gate
System Segment and Gate Types
Bit 12 = 0
Application Segment Types
Bit 12 = 1
TYPE (Data Segments)
Data
Data
Data
Data
Data
Data
Data
Data
Read-Only
Read-Only, accessed
Read/Write
Read/Write accessed
Read-Only, expand down
Read-Only, expand down, accessed
Read/Write, expand down
Read/Write, expand down, accessed
TYPE (Code Segments)
Code
Code
Code
Code
Code
Code
Code
Code
Execute-Only
Execute-Only, accessed
Execute/Read
Execute/Read, accessed
Execute/Read, conforming
Execute/Read, conforming, accessed
Execute/Read-Only, conforming
Execute/Read-Only, conforming accessed
SEWA/SCRA:
Revision 1.0
73
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