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The voltage levels on my PC serial port, however, were standard RS-232 levels: -6.0 V for ONE bits and 6.0 V for ZERO bits.I needed to build an adapter to match these signals. The MAX232 is a dual driver/reciever that includes a capacitive voltage generator to supply EIA-232 voltage levels from a single 5 V supply.Miraculously, I was able to find a connector of the right size from some other electronics, and I connected it to J1.The voltage levels from J1 were standard TTL levels: 0.0 V for ZERO bits and 3.3 V for ONE bits.Loosing power during the firmware update could have caused the XO brick.The following screen appeared as its firmware was updated.One Education still shares its modular dreams on its website as "Infinity: Concept," so that's nice.
At this point, all applications on the laptop were lost.
Instead, Infinity: One is just a standard Windows 10 computer, complete with a 10-inch touchscreen (and a handy pen holder, which I appreciate) which pops out from the hinge to do tablet duties.
It runs on an Atom processor, not ARM, and it even has a keyboard that looks usable by human hands.
This battery is standard for many calculators and watches.
On the motherboard, there was a special serial port, J1, located near the wireless module.
I volunteered to try to resurrect a bricked OLPC laptop for the computer science department.