Fundamentals of Digital Logic and Microcomputer Design |
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Sayfa 241
The bits in the status register are called “ flags . ” The status of a specific
microprocessor operation is indicated by each flag , which is set or reset by the
microprocessor ' s internal logic to indicate the status of certain microprocessor
operations ...
The bits in the status register are called “ flags . ” The status of a specific
microprocessor operation is indicated by each flag , which is set or reset by the
microprocessor ' s internal logic to indicate the status of certain microprocessor
operations ...
Sayfa 498
For the specified shift count , the SF , ZF , and PF flags are set according to the
value of the result . CF is set to the value of the last bit shifted out . OF and AF are
undefined . As an example , consider SHLD BX , DX , 2 . If [ BX ] = 183F16 and ...
For the specified shift count , the SF , ZF , and PF flags are set according to the
value of the result . CF is set to the value of the last bit shifted out . OF and AF are
undefined . As an example , consider SHLD BX , DX , 2 . If [ BX ] = 183F16 and ...
Sayfa 499
No flags are affected . C . String VO Instructions There are new string I / O
instructions in the 80386 beyond those of the 8086 : INS mem32 , DX ( or INSD )
and OUTS DX , mem32 ( or OUTSD ) . INSD inputs 32 - bit data from a port
addressed ...
No flags are affected . C . String VO Instructions There are new string I / O
instructions in the 80386 beyond those of the 8086 : INS mem32 , DX ( or INSD )
and OUTS DX , mem32 ( or OUTSD ) . INSD inputs 32 - bit data from a port
addressed ...
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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