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add XBA to provide a B register #5

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BigEd opened this issue Apr 14, 2012 · 0 comments
Open

add XBA to provide a B register #5

BigEd opened this issue Apr 14, 2012 · 0 comments

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@BigEd
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BigEd commented Apr 14, 2012

a B register offers a little extra elbow room for the programmer, but also opens up an easy implementation of multiply, which needs to write back a double width result.
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@BigEd