what is A-MODE and R-MODE?

Answer Posted / rama krishna m.

Amode means Addressing Mode : by seeing the addressing mode we came to know whether system is running under 24-Bit or 31-Bit or 64-Bit Addressing Mode, if the os below O/S 370 then it is run under 24-Bit(it is uses 16 MB of Virtual Memory to run user program)this is called Below the line. From MVS/OS 370-XA(Extended Architecture)it supports 31-bit Architecture the Address Space is 2 GB. Then MVS/ESA supports more than 2 GB of virtual memory to run user programs. Z/OS only having the 64-Bit Architecture. ( if u want to see Amode then submit ur Cobol program thru Jcl, goto spool open Sysprint and have look for AMODE.

Rmode : Where the program is running ( Residency Mode )

Is This Answer Correct ?    3 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Explain the purpose of dd dummy statement?

781


My Question is 1. How to cound no. of records in JCL. Please explain with an example. 2. How to execute only odd steps in JCL? I know EDIT TYPE = Inculde, Step Name = 1,3,5 and COND code for all even step. Anyone knows other than this.

2089


Explain the purpose of dd * statement in jcl?

721


what are the statements that are not valid to be included in an include statement?

925


List the different components of jcl statement?

783






What is catelog procedure and how many catelog procedure to use in one job?

7719


What do we mean by 'Virtual storage' for a dataset and for a JOBSTEP ? What is the significance of the following statement for a programmer 'Virtual storage results in program addresses being independent of the addresses that actually exist in a computer' ?

1663


What is NOTCAT ?

842


What is the purpose of dd * statement in jcl?

901


Does jcl support automatic restart?

855


How to run cobol program using jcl?

737


What is the use of symbol // in jcl?

1017


Many jcl statements contain specific values designed to direct and control the execution of the statement. What are these fields called?

808


a set statement is used to define commonly used symbolic across job steps or procedures. It initializes the previous values in the symbolic names. It has to be defined before the first use of the symbolic names in the jcl. State whether true or false?

706


Give the syntax of job specifying jcl statement.

714