Teensy Placement, Initial Power-Up, and the Control Block

The PC project board and headers arrived today, so I'm playing with placement of the interface circuit. Probably going to attach it to the back of the keyboard, as there is a nice flat metal surface to which to attach double-sided tape. The limiter is the existing plastic Atari keyboard header. It's 32 years old, so I don't want to put a lot of stress on it - which precludes mounting the circuit in the bottom half of the case.

Oh, and I connected the Pi through the HDMI-VGA interface and powered it up yesterday.  Works great so far.  I discovered the 8GB SD card is listed as questionable in compatibility (though it worked OK), so I decided to replace it with a 32GB class 10 Samsung EVO card... it was only $11.  That way, we can load every last bit of whatever we want on it.

Also put in a pre-order for the RetroPie Control Block ($45 with shipping).  That will mean adding 1 additional hole on the back for the mini-USB port.  This is the power port that must be used, as the Control Block has soft-power functionality that will feed the Pi.  It also allows adding a power switch and status LED.  I will use the LED on the Atari keyboard for that.  Will try the existing lame red LED, which I verified is working.