Intel 80286 User Manual

PROGRAMMING NUMERIC APPLICATIONS
Table 2-14. Instruction Set Reference Data (Cont'd.)
FSETPM FSETPM (no operands)
Exceptions: None
Set protected mode
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical Range
Transfers
Bytes
(no operands) 2-8
0 2
FSETPM
FSQRT FSQRT (no operands)
Exceptions:
I, 0, P
Square root
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers Bytes
(no operands) 183
180-186
0
2 FSQRT
FST
FST destination
Exceptions:
1,0, U, P
Store real
Execution Clocks
Operands
Operand Word
Code
Transfers
Bytes
Coding Example
Typical Range
ST(i)
18
15·22 0
2 FST ST(3)
short-real
87
84-90 2 2-4 FST CORRELATION [01]
long-real 100 96-104 4 2-4
FST MEAN_READING
FSTCW/ FSTCW destination
Exceptions: None
FNSTCW Store control word
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical Range
Transfers
Bytes
2-bytes
15 12-18 1 2-4
FSTCW SAVE_CONTROL
FSTENV/ FSTENV destination
Exceptions: None
FNSTENV Store environment
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers
Bytes
14-bytes 45 40-50 7
2-4 FSTENV [SP]
2-34
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Intel 80286 Specifications

General

Processor Type	Microprocessor
Clock Speed	6 MHz to 25 MHz
Transistor Count	134, 000
Addressable Memory	16 MB
Instruction Set	x86
Architecture	x86
Data Bus Width	16-bit
Address Bus Width	24-bit
Operating Modes	Real mode, Protected mode
Process Technology	1.5 µm
Voltage	5V
Introduced	1982
Package	68-pin PGA