Converting Assembly to machine code. Help with Address modes

Hi,

I have a question and if anyone could assist me, it would be really appreciated.

I am trying to convert the following line of Assembler code into machine code, but I am unable to understand how to choose the Source and Destination modes from my copy of the instruction set.

The original instruction is:-

Quote:

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MOVE.L #$D3A5, D2

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Starting with a 'blank':-

Quote:

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0000 0000 0000 0000

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I added the MOVE part, leaving:-

Quote:

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0000 0000 0000 0000

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I then added the .L (signifying a LONG WORD), leaving:-

Quote:

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0010 0000 0000 0000

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Then I added the destination address (D2):-

Quote:

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0010 0100 0000 0000

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But now I am stuck, I have the answer which is:-

Quote:

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0010 0100 0011 1100

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My problem is that despite having a copy of the instruction set, I don't understand the notation used.

I am aware that I am moving the data it'self in Hex format, but unfortunately this isn't bridging my gap in knowledge. The image below is a copy of the instruction set, but as I say, I do not understand the addressing mode's and so am not able to convert the last remaining parts of the assembler.

http://www.imageox.com/image/273085-image.jpeg

If anyone could explain how to select the correct addressing modes so as to be able to finish to conversion to machine code I would be extremely grateful.

Many thanks for any help!

Swerve.

OK, let's pick up more or less where you left off.

Quote:

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0 0 10 010 000 000 000

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The source is #$D3A5.

That looks like a possible memory address in hexadecimal. Looking through your addressing modes for source, there is only one marked as starting with a '#'. That option contains mode 111, and register 100. Thus, we have this:

Code:

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0 0 10 010 000 111 100

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Hope that helps.

I like the other style notation so much better.

mov d2 , [D3A5]


so much easier to read imo