Yes, Mjoy8, MJoy16, MJ16... use diode matrix.
Old Mindaugas instructions manual - by the way, well detailed.
http://plakhotenko.narod.ru/radio/MJoy16-C1_Users_Manual_v1.pdfUpper, right 3 lines of pins are (8) analog axes inputs.
AB... L are matrix rows.
123...8 are matrix columns
L, Dn, R, Up - POV HAT (8 way) input. Dont confuse small L (HAT) with big L (this is column input).
Cnt, Mde and Int refer to Mindaugas manual.
GVL224 is SimHQ user, eventually send him PM