Unit01_Session_04.pdf
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This document provides an introduction to the memory, registers, addressing, data formats, instruction sets, and instruction formats of IBM 360 and 370 computer systems. It discusses the basic memory unit of bytes and addressing using base registers. There are 16 general purpose 32-bit registers and 4 floating point 64-bit registers, as well as a 64-bit program status word. The document lists textbooks for further reference on system programming and operating systems related to IBM 360 and 370 computer architectures.
Unit01_Session_04.pdf
- 1. Sanjivani Rural Education Society’s Sanjivani College of Engineering, Kopargaon-423 603 (An Autonomous Insttute, Affiated to Savitribai Phufe Pune University, Pune) NACC ‘A’ Grade Accredited, ISO 9001:2015 Certified Department of Computer Engineering (NBA Accredited) Dr. S. N. Gunjal Assistant Professor E-mail : gunjasanjay@sanjivani.org.in Contact No: 91301 91301 Ext :145, 9503916876 Course- System Programming and Operating System (CO312) Introduction to Machine Structure- IBM 360 and 370 Dr. S.N Gunjal Dr. S.N Gunjal
- 2. DEPARTMENT OF COMPUTER ENGINEERING, Sanjivani COE, Kopargaon 2 1. Memory The basic unit of memory in 360 and 370 is a byte (eight bits of information). It means, each addressable position in memory can contain a byte of information. There are facilities to operate on contiguous bytes in basic unit. Machine Structure- IBM 360 and 370 Byte 1 8 Half word 2 16 Word 4 32 Double word 8 64
- 3. DEPARTMENT OF COMPUTER ENGINEERING, Sanjivani COE, Kopargaon 3 2. Register There are a total of 16 general purpose registers of 32 bits each. In addition there are 4 floating point register of 64 bits each. It also has a 64 bits program status word (PSW) that contains the value of the location counter, protection information and interrupt status. Let us take an instruction A 1,901(2,15). A(opcode)1(operand in register 1),901(offset) (2(index register),15(base register)) Machine Structure- IBM 360 and 370
- 5. 1. Addressing using base register.
- 6. DEPARTMENT OF COMPUTER ENGINEERING, Sanjivani COE, Kopargaon 6 2. Addressing using base register. Machine Structure- IBM 360 and 370
- 10. Instruction Set
- 16. Example of SS instruction
- 17. 15/06/20 DEPARTMENT OF COMPUTER ENGINEERING, Sanjivani COE, Kopargaon Text books & Reference Books(R) : Text Books(T): John Donovan, “System Programming”, McGraw Hill, ISBN 978-0--07-460482-3.
- 18. DEPARTMENT OF COMPUTER ENGINEERING, Sanjivani COE, Kopargaon 18 Thank You Thank You