INTEL387TMDX Ver la hoja de datos (PDF) - Intel
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INTEL387TMDX Datasheet PDF : 41 Pages
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Intel387TM DX MATH COPROCESSOR
31
0000
0000
32-BIT REAL-ADDRESS MODE FORMAT
23
15
7
0
RESERVED
CONTROL WORD
0
RESERVED
STATUS WORD
4
RESERVED
TAG WORD
8
RESERVED
INSTRUCTION POINTER 15 0
C
INSTRUCTION POINTER 31 16
0 OPCODE 10 0
10
RESERVED
OPERAND POINTER 15 0
14
OPERAND POINTER 31 16
0000
00000000
18
Figure 2 4 Real Mode Intel387TM DX MCP 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 Intel387TM DX MCP
Instruction and Data Pointer
Image in Memory 16-Bit Format
16-BIT REAL-ADDRESS MODE AND
VIRTUAL-8086 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 Intel387TM DX MCP
Instruction and Data Pointer
Image in Memory 16-Bit Format
13
13
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