This is very crude variant of ARM core. ARM7TM was used as a prototype for this model. Definitely there are a lot of bugs and holes in it and some features are not implemented for the moment.
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Features that are not implemented currently:
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1. Thumb decoder is not implemented (but will be implemented).
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2. No coprocessor interface.
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3. Memory interface for the moment indicates non-sequential transactions only.
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If you find any bug in this core don't hesitate to contact me.