Fundamentals of Digital Logic and Microcomputer Design |
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Sayfa 388
Therefore , it has a main ( directly addressable ) memory of one megabyte ( 220
bytes ) . The memory of an 8086 - based microcomputer is organized as bytes .
Each byte is uniquely addressed with 20 - bit addresses of 0000016 , 0000116 , .
Therefore , it has a main ( directly addressable ) memory of one megabyte ( 220
bytes ) . The memory of an 8086 - based microcomputer is organized as bytes .
Each byte is uniquely addressed with 20 - bit addresses of 0000016 , 0000116 , .
Sayfa 403
Decimal numbers are stored in bytes ; two digits per byte for packed decimal and
one digit per byte for unpacked decimal with the high 4 bits filled with zeros .
TABLE 9 . 2 8086 Arithmetic Instructions Addition ADD a , b Add byte or word
ADC a ...
Decimal numbers are stored in bytes ; two digits per byte for packed decimal and
one digit per byte for unpacked decimal with the high 4 bits filled with zeros .
TABLE 9 . 2 8086 Arithmetic Instructions Addition ADD a , b Add byte or word
ADC a ...
Sayfa 407
3 8086 Bit Manipulation Instructions Logicals NOT mem / reg NOT byte or word
AND a , b AND byte or word OR a , b OR byte or word XOR a , b Exclusive OR
byte or word TEST a , b Test byte or word Shifts SHL / SAL mem / reg , CNT Shift
...
3 8086 Bit Manipulation Instructions Logicals NOT mem / reg NOT byte or word
AND a , b AND byte or word OR a , b OR byte or word XOR a , b Exclusive OR
byte or word TEST a , b Test byte or word Shifts SHL / SAL mem / reg , CNT Shift
...
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NUMBER SYSTEMS AND CODES | 31 |
BOOLEAN ALGEBRA AND DIGITAL LOGIC GATES | 67 |
SEQUENTIAL LOGIC DESIGN | 171 |
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addition address register addressing modes assembly asserted Assume base basic binary bits block branch byte cache called carry chip circuit clear clock combinational complement condition connected consider contains contents converter counter cycle decoder determine device diagram digits displacement effective enable example exception execution external field Figure flags flip-flop four function gate hardware HIGH immediate implemented indicates indirect Initialize input instruction interface interrupt K-map language lines loaded logic main memory means memory microcomputer microprocessor mode MOVE multiplication Note obtained offset operand operation output Pentium perform pins placed pointer port processing processor reset result segment sequence shift shown in Figure shows signal signed specified stack starting stored transfer typical unit vector Write zero