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OVERVIEW OF THE 80C186 FAMILY ARCHITECTURE
7
Signed Byte
Sign Bit
Magnitude
15 14
Signed Word
Sign Bit
31
Signed Double
Word*
Sign Bit
+7
63
Signed Quad
Word*
Sign Bit
7
Binary Coded
Decimal (BCD)
BCD Digit n
7
ASCII
ASCII Character n
7
Packed BCD
Most
Significant Digit
7
String
Byte Word n
31
Pointer
+9
79
Floating
Point*
Sign Bit
NOTE: *Directly supported if the system contains an 80C187.
Figure 2-23. 80C186 Modular Core Family Supported Data Types
2-38
0
+1
0
0
8 7
MSB
Magnitude
+3
+2
24
23
16
MSB
Magnitude
+6
+5
+4
48
47
32
MSB
Magnitude
+n
0
+n
0
+n
0
+n
0
+2
+3
24
23
16
Selector
+8
+7
+6
Exponent
7
Unsigned Byte
MSB
Magnitude
+1
15
Unsigned
Word
MSB
Magnitude
+1
0
15
8 7
+1
+3
+2
31
16
15
0
+1
7
0 7
BCD Digit 1
BCD Digit 0
+1
0
0 7
7
ASCII Character 1 ASCII Character 0
0
+1
0 7
7
Least
Significant Digit
0
+1
7
0 7
Byte Word 1
Byte Word 0
0
+1
15
8 7
Offset
+5
+4
+3
+2
Magnitude
0
0
8 7
0
0
0
0
0
0
0
0
0
+1
+0
0
A1027-0B
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