Assembler Questions

sree reddy · New User Joined: 20 Jul 2007 Posts: 27 Location: bangalore

Hi i am new to Assembler i have below questions

1. How to pass data from main program to sub program ?
2. How to debug Assembler program are there any tools to debug ?

Could anyone please answer the questions

Thanks
Sree

Garry Carroll · Posted: Wed Jun 06, 2012 12:45 pm

Hi,

1. By convention, R1 is used to address the data to be passed. R1 would point to a (list of) address(es) of field(s) passed. thwe high-order bit of the last address in the list is set 'on'.

2. There are numerous debugging tools which can handl;e Assembler (e.g. IBM Debug Tool, Expediter)

Garry.