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Assembler Questions

 
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sree reddy

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Joined: 20 Jul 2007
Posts: 27
Location: bangalore

PostPosted: Wed Jun 06, 2012 9:35 am    Post subject: Assembler Questions
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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
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Garry Carroll

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Joined: 08 May 2006
Posts: 992
Location: Dublin, Ireland / Edinburgh, Scotland

PostPosted: Wed Jun 06, 2012 12:45 pm    Post subject:
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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.
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