Datenblatt-Suchmaschine für elektronische Bauteile |
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CS80C286-16 Datenblatt(PDF) 9 Page - Intersil Corporation |
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CS80C286-16 Datenblatt(HTML) 9 Page - Intersil Corporation |
9 / 60 page 9 Instruction Set The instruction set is divided into seven categories: data transfer, arithmetic, string manipulation, shift/rotate/logical, high level, processor control and control transfer instructions. These categories are summarized in Table 2. An 80C286 instruction can reference zero, one, or two oper- ands; where an operand may reside in a register, in the instruction itself, or in memory. Zero-operand instructions (e.g. NOP and HLT) are usually one byte long. One-operand instructions (e.g. INC and DEC) are usually two bytes long but some are encoded in only one byte. One-operand instructions may reference a register or memory location. Two-operand instructions permit the following six types of instruction operations: • Register to Register • Memory to Memory • Memory to Register • Register to Memory • Immediate to Register • Immediate to Memory Two-operand instructions (e.g. MOV and ADD) are usually three to six bytes long. Memory to memory operations are provided by a special class of string instructions requiring one to three bytes. For detailed instruction formats and encodings refer to the instruction set summary at the end of this document. TABLE 2A. DATA TRANSFER INSTRUCTIONS GENERAL PURPOSE MOV Move byte or word PUSH Push word onto stack POP Pop word off stack PUSHA Push all registers on stack POPA Pop all registers from stack XCHG Exchange byte or word XLAT Translate byte INPUT/OUTPUT IN Input byte or word OUT Output byte or word ADDRESS OBJECT LEA Load effective address LDS Load pointer using DS LES Load pointer using ES FLAG TRANSFER LAHF Load AH register from flags SAHF Store AH register in flags PUSHF Push flags onto stack POPF Pop flags off stack TABLE 2B. ARITHMETIC INSTRUCTIONS ADDITION ADD Add byte or word ADC Add byte or word with carry INC Increment byte or word by 1 AAA ASClI adjust for addition DAA Decimal adjust for addition SUBTRACTION SUB Subtract byte or word SBB Subtract byte or word with borrow DEC Decrement byte or word by 1 NEG Negate byte or word CMP Compare byte or word AAS ASClI adjust for subtraction DAS Decimal adjust for subtraction MULTIPLICATION MUL Multiply byte or word unsigned lMUL Integer multiply byte or word AAM ASClI adjust for multiply DIVISION DlV Divide byte or word unsigned lDlV Integer divide byte or word AAD ASClI adjust for division CBW Convert byte to word CWD Convert word to doubleword TABLE 2C. STRING INSTRUCTIONS MOVS Move byte or word string INS Input bytes or word string OUTS Output bytes or word string CMPS Compare byte or word string SCAS Scan byte or word string LODS Load byte or word string STOS Store byte or word string REP Repeat REPE/REPZ Repeat while equal/zero REPNE/REPNZ Repeat while not equal/not zero 80C286 |
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Ähnliche Beschreibung - CS80C286-16 |
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