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After some (big) preparatory work and before a (real) video that explains how we got there, here is a little demo of the BMW E90 cluster connected to a Model 2 emulator.
It also works with some games running in SuperModel (Model 3 emulator), but I love Daytona USA so much...
Some steps are already detailed here (in french): www.delta-isla...
To sum up:
In-house software analyzes the RAM of emulators to fetch information on speed, RPM, and lights, and transmits orders to a USB port...
... to a microcontroller that drives the button lights
it also reads the status of the buttons and the gear lever, and retransmits them to the computer
it also controls a BMW E90 cluster using CAN bus, with display of speed and RPM.
I had my best race on the Advanced circuit while I was filming. With perhaps a hint of anti-game in the last seconds.
It looks like this counter is not completely useless! ;-)