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【導(dǎo)讀】CHAPTER6:. 3rdEdition,IrvEnglander. JohnWileyandSons?2020. LindaSenne,BentleyCollege. WilsonWong,BentleyCollege. Contentmaybe. Dataor. Instructions. AddressContent. Opcode. Operationcode. Arbitrarymnemonic. Operand. Dataor. Addressofdata. AddressContent. OpcodeOperand. Magic!AssemblyLanguage. SpecifictoaCPU. drivers. InstructionSet. Arithmetic1xxADD. 2xxSUB. 5xxLOAD. 902Output. MachineControl. 000STOP. COB. Input/Output. in/outbaskets. Content. OpCodeOperand. IN(input)901. OUT(output)902. LMCInput/Output. IN. OUT. Content. OpCodeOperand. STO(store)3xx. LDA(load)5xx. LMCInternalData. LDA. STO. mailbox. Readmailbox. Content. OpCodeOperand. ADD1xx. SUB2xx. ADD. SUB. Assumedataisstored. inmailboxeswith. addresses>90. Writeinstructions. Inputa#. Storethe#. Inputa#. Add. Outputthe. number. UsingMnemonics. 00IN;input1stNumber. 01STO99;storedata. 02IN;input2ndNumber. 03ADD99;add1st#to2nd#. 04OUT;outputresult. 05COB;stop. 99DAT00;data. 00901;input1stNumber. 01399;storedata. 02901;input2ndNumber. 03199;add1st#to2nd#. 04902;outputresult. 05000;stop. 99000;data. ProgramControl. ofsequence). HaltContent. OpCodeOperand. BR(Jump)6xx. BRZ(Branchon0)7xx. BRP(Branchon+)8xx. COB(stop)0(ignore). InstructionSet. Arithmetic1xxADD. 2xxSUB. 5xxLOAD. BR6xxJUMP. BRZ7xxBRANCON0. BRP8xxBRANCHON+. Inpu
【正文】 that mailbox (he remembers to replace it in case he needs it later). Chapter 6 Little Man Computer 625 Execute, cont. 3. He walks over to the calculator and punches the number in. 4. He walks over to the location counter and clicks it, which gets him ready to fetch the next instruction. Chapter 6 Little Man Computer 626 von Neumann Architecture (1945) ? Stored program concept ? Memory is addressed linearly ? Memory is addressed without regard to content Chapter 6 Little Man Computer 627 Copyright 2020 John Wiley amp。 Sons All rights reserved. Reproduction or translation of this work beyond that permitted in Section 117 of the 1976 United States Copyright Act without express permission of the copyright owner is unlawful. Request for further information should be addressed to the permissions Department, John Wiley amp。 Songs, Inc. The purchaser may make backup copies for his/her own use only and not for distribution or resale. The Publisher assumes no responsibility for errors, omissions, or damages caused by the use of these programs or from the use of the information contained herein.”
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