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Intel 80286 User Manual

Intel 80286
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OVERVIEW
OF
NUMERIC PROCESSING
Table 1-12.
Infinity
Operands and Results
Operation Projective Result Affine Result
Addition
+00
plus
+00
Invalid operation
+00
-00
plus-oo
Invalid operation
-00
+00
plus-oo
Invalid operation Invalid operation
-00
plus
+00
Invalid operation Invalid operation
±oo
plus
±X
'00 '00
±X
plus
±oo
'00
'00
Subtraction
+00
minus
-00
Invalid operation
+00
-00
minus
+00
Invalid operation
-00
+00
minus
+00
Invalid operation Invalid operation
-00
minus
-00
Invalid operation
Invalid operation
±oo
minus
±X
'00 '00
±X
minus
±oo
too
too
Multiplication
±oo·±oo
E9
E9
±oo·
±y
E9
E9
±O·
±oo,
±oo'
±O Invalid operation Invalid operation
Division
±oo
-+-
±oo
Invalid operation Invalid operation
±oo
-+-
±X
E9 E9
±X
-+-
±oo
E9
E9
FSQRT
-00
Invalid operation Invalid operation
+00
Invalid operation
+00
FPREM
±oo rem
±oo
Invalid operation Invalid operation
±oo rem
±X
Invalid operation Invalid operation
±Y
rem
±oo
'Y 'Y
±O rem
±oo
'0
'0
FRNDINT
±oo
'00
'00
FSCp..LE
±
00
scaled by ±
00
Invalid operation Invalid operation
±
00
scaled by ± X
'00
'00
± 0 scaled by ±
00
'0
'0
± Y scaled by ±
00
Invalid operation Invalid operation
FXTRACT
±oo
Invalid operation Invalid operation
Compare
±oo:
±oo
A=B
-00
<
+00
±oo:
±Y
A ? B (and) invalid operation
-00
<Y
<
+00
±oo: ±O A
'?
8 (andi invaiiu
UI-'tll
i:liiu;-I
___
n
__
v.J_V_I.......,
FTST
±oo
A ? B (and) invalid operation
'00
NOTES:
X zero or nonzero operand
Y nonzero operand
sign of original operand
1-28
pcjs.org

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Intel 80286 Specifications

General IconGeneral
Processor TypeMicroprocessor
Clock Speed6 MHz to 25 MHz
Transistor Count134, 000
Addressable Memory16 MB
Instruction Setx86
Architecturex86
Data Bus Width16-bit
Address Bus Width24-bit
Operating ModesReal mode, Protected mode
Process Technology1.5 µm
Voltage5V
Introduced1982
Package68-pin PGA

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