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68HC11 source code book/manual recommendations?

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Old 04-22-2006, 01:33 PM
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68HC11 source code book/manual recommendations?

I've read the official motorola crap, but it doesn't explain how operations work in great enough detail...

So are there any assembly manuals with better explanations? Any help here is greatly appreciated
Old 04-22-2006, 02:48 PM
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I'm always looking for better explainations of the function too.
There was an excellent writeup on how 2D and 3D tables work on Corvette Forum. There was a link to it on one of the threads but I can't locate it now.
If anyone has it, please post it up again.

There is a nice function lookup type help file available near the bottom of this page.
Motorola 68HC11 Microcontroller
I use it quite often.
Old 04-22-2006, 03:08 PM
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Originally Posted by JP86SS
There was an excellent writeup on how 2D and 3D tables work on Corvette Forum. There was a link to it on one of the threads but I can't locate it now.
If anyone has it, please post it up again.
Here you go:
How a 3D Table Works

Todd
Old 04-22-2006, 05:11 PM
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The motorola reference manual covers them fairly well. Just stick to chapters 6 and the appendix with the commands. Most of the other stuff is useful, but confusing if your just getting started. With most of the commands covered in the appendix, there isnt much more to them then whats covered by the descriptions given.

The confusing part may be the actual binary operations that are taking place. Reading up on how binary math/logic works will help you get a better understanding of how the commands work.

Last edited by dimented24x7; 04-22-2006 at 05:15 PM.
Old 04-22-2006, 11:52 PM
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Thanx, Tpep for the link.
And if you really want to mess your brain up, look into negative binary values.
They appear on some of the sequences if you do any simulations and look at the output. The code can assemble to jump forward or backwards to addresses (giving the negative jump relative to the current PC)
Its a good thing assembly is not written that way or I'd need a straightjacket by now.
Simulators can help you learn by showing chunks of code executing.
The weird stuff makes you look into exactly what happened just be wary of the output logging because of what I said above.
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