As stated previously, I've already done all that crap. When you've read 1200 combined pages of PDFs for one chip, a person cannot be expected to remember all of it.

In the time it took you to give me the standard "Read the manual" line, you could have answered the question.

erik malund wrote:
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On another note, cause im new to ASM, Registers could be throught of as "variables" couldn't they? How many registers are there?

This will be answered when you download and read the 80C51_FAM documents:
http://www.semiconductors.philips.com/products/...other.html