Intel 80286 User Manual

PROGRAMMING NUMERIC APPLICATIONS
Table 2-14. Instruction Set Reference Data (Cont'd.)
FDECSTP
FDECSTP (no operands)
Exceptions: None
Decrement stack pointer
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical Range
Transfers
Bytes
(no operands)
9
6-12
0 2
FDECSTP
FDIV
FDIV //source/destination,source
Exceptions:
I, D, Z, 0, U, P
Divide real
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical Range
Transfers
Bytes
//ST(i),ST
198 193-203
0
2
FDIV
short·real 220 215-225 2 2-4 FDIV DISTANCE
long-real
225
220-230
4 2-4 FDIV
ARC [DI]
FDIVP FDIVP destination, source
Exceptions:
I, D, Z, 0, U, P
Divide real
and pop
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers Bytes
ST(i),ST 202 197-207
0 2
FDIVP ST(4),ST
FDIVR FDIVR //source/destination, source
Exceptions:
I, D, Z, 0, U, P
Divide real reversed
Execution Clocks
Operands
Operand Word
Code
Transfers
Bytes
Coding Example
Typical Range
//ST,ST(i)/ST(i),ST 199 194-204
0
2 FDIVR ST(2),ST
short-real
221
216-226
2
2·4
FDIVR [8X].PULSE_RATE
long-real
226
221-231
4 2-4 FDIVR RECORDER.FREQUENCY
FDiVnF i=iirv"nr uestiiiCitiCiii, SvuiGo
Exceptions: I, D, Z, 0, U, P
Divide real reversed and pop
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical
Range
Transfers Bytes
ST(i),ST
203 198-208
0
2 FDIVRP
ST(1 ),ST
2-26
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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