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Where can I find a list of the GPIO pins' location on the Raspberry Pi?

I have found the following 4 images, which all contradicts each other:

Specifically where is GPIO 4 on the Raspberry Pi model B rev. 1 (256 MB RAM)?

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up vote 7 down vote accepted

Simon Monk had a recent blog entry on this topic, and provides a pdf download for easy printout. Includes GPIO reference leaflets for revisions 1 and 2:

Raspberry Pi and Breadboard (Raspberry Leaf)

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Are you sure rev. 1 doesn't refer to Model A and rev. 2 refers to Model B in that post? – Tyilo Feb 25 '13 at 22:00
@Tyilo : Probably not since there is a Model B, rev. 1 and Model B rev. 2, and a Model A rev. 2 (since no model A rev. 1 boards were actually made). – goldilocks Feb 25 '13 at 23:09
@goldilocks OK, cool. – Tyilo Feb 25 '13 at 23:31

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