ASM196 DCW directives

Posted on 2003-03-21
Medium Priority
Last Modified: 2008-02-01
I am currently doing the debugging of assembly codes for 80296SA chip. I do have the definition of all the possible directives in ASM196 but the problem is its vague definition. I have this segment of code which is written as follows:

DCW    0002H,0843H ; 0002h = ADDRESS, 43h = DEFAULT DATA    
                ; 0003h = ADDRESS, 08h = DEFAULT DATA

Further explanation on the meaning of how the directive is being used is much appreciated...thanks.    
Question by:ray_ars
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LVL 11

Accepted Solution

dimitry earned 200 total points
ID: 8185796
According to A196 assembler spec:
Function: Defines a word constant in a const or code segment.
[ label:] dcw expression [,...]
Therefore it is constant definition. But it is also used
to set interrupt services if it is used in code segment:
  cseg at 02030h
  dcw Transmit_ISR
It simply sets at the beginning of 02030h segment address of Transmit_ISR (function name)

Author Comment

ID: 8189402
Thank you very much. Would you mine giving me some sites that I could refer in the future pertaining to A196 assembler?
LVL 11

Expert Comment

ID: 8189452
Actually Intel has a lot of information about 80196:

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