Legacy HW wiki here: https://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenso_board


**Q:** Why three USB connectors?

**A:** https://rusefi.com/forum/viewtopic.php?f=4&t=1418


**Pinouts**

https://rusefi.com/wiki/index.php?title=Vehicle:Mazda_Miata_2003

https://rusefi.com/wiki/index.php?title=Vehicle:Mazda_Miata_2003_alt


**red 2003 VVT test mule Miata NB2 #27**

https://rusefi.com/forum/viewtopic.php?f=3&t=1095

[PCB front](2003_Miata_NB2_rusefi27_20190413_front.jpg)
[PCB back](2003_Miata_NB2_rusefi27_20190413_back.jpg)