參數(shù)資料
型號: intel i387
廠商: Intel Corp.
英文描述: Military I387 Math Coprocessor(軍用I387數(shù)學協(xié)處理器)
中文描述: 軍事I387數(shù)學協(xié)處理器(軍用I387數(shù)學協(xié)處理器)
文件頁數(shù): 12/41頁
文件大?。?/td> 457K
代理商: INTEL I387
MILITARY i387
TM
MATH COPROCESSOR
32-BIT REAL-ADDRESS MODE FORMAT
15
31
23
7
0
RESERVED
CONTROL WORD
0
RESERVED
STATUS WORD
4
RESERVED
TAG WORD
8
RESERVED
INSTRUCTION POINTER 15..0
C
0 0 0 0
INSTRUCTION POINTER 31..16
0
OPCODE 10..0
10
RESERVED
OPERAND POINTER 15..0
14
0 0 0 0
OPERAND POINTER 31..16
0 0 0 0
0 0 0 0 0 0 0 0
18
Figure 2.4. Real Mode i387
TM
NPX Instruction and Data Pointer Image in Memory, 32-Bit Format
16-BIT PROTECTED MODE FORMAT
15
7
0
CONTROL WORD
0
STATUS WORD
2
TAG WORD
4
IP OFFSET
6
CS SELECTOR
8
OPERAND OFFSET
A
OPERAND SELECTOR
C
Figure 2.5. Protected Mode i387
TM
NPX
Instruction and Data Pointer
Image in Memory, 16-Bit Format
16-BIT REAL-ADDRESS MODE AND
VIRTUAL-M8086 MODE FORMAT
15
7
0
CONTROL WORD
0
STATUS WORD
2
TAG WORD
4
INSTRUCTION POINTER 15..0
6
IP19.16
0
OPCODE 10..0
8
OPERAND POINTER 15..0
A
DP 19.16 0 0 0 0 0 0 0 0 0 0 0 0
C
Figure 2.6. Real Mode i387
TM
NPX
Instruction and Data Pointer
Image in Memory, 16-Bit Format
12
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