| | [* black] We ''assume'' these barcodes are some sort of cryptic congratulatory message, or perhaps a short apology for the new connector design. |
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| | [* icon_note] Perhaps they're just a quick boast about the inconceivable .4 mm of glass on the 4's display. |
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| | [* black] Our first peek behind the display reveals our favorite silicon-based snack—chips! In particular, we notice a number of [http://blog.surface.com/2015/05/msft-acquires-pen-tech-from-n-trig-ltd/|N-trig|new_window=true] IC's, likely control hardware for the Surface Pen. |
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| | [* red] N-trig DS-D5000 A1 |
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| | [* orange] N-trig DS-A5048 B2 |
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| | [* yellow] Macronix [http://80.93.56.75/pdf/0/3/7/1/9/03719712.pdf|MX25U1635F|new_window=true] 1.8V 16 Mb MXSMIO Serial Flash Memory |
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