Usages of Register in Assembler

afroz alam · New User Joined: 02 Jul 2007 Posts: 13 Location: India

Hi all.....

Can anyone plz tell me what is the purpose of Register 0,2,14,and 15 in assembly language.

afroz

dick scherrer · Posted: Thu Jul 05, 2007 10:03 pm

Hello,

You may want to search the web for some introductory assembler info or look at the assembler book written by Kevin McQuillen that is available form Murach Publishing. Kevin's book is excellent.

There are 16 registers - zero to 15. Various assembler instructions require the use one or more of these registers.

haibrs · New User Joined: 03 Jan 2007 Posts: 8 Location: Mumbai

Hi,
Register 0 is for System usage.
Register 2 is used for speacial purpose instruction like TRT, etc.
Register 14, 15 is used for Calling & Called programs address.
Register 15 is alse used for Return Code.

Regards,
BRS.

Phrzby Phil · Posted: Tue Jul 17, 2007 5:16 pm

haibrs's answer is not exactly the answer to your question, but rather to the important question (which is perhaps what you intended): "What are the conventional uses of these registers?"

Assembler language per se has no particular preference.