Multitap PSX - 4.1

[patchap40]

hello,
I haven't noticed anything regarding the support of multitap for psx on the changelog file on the 4.1
I know it is supposed to be supported now, however I haven't found any how-to, what is the process to follow?
tks!

[patchap40]

I'll try this (french)
https://forum.recalbox.com/topic/9322/4-1-multitap-psone
can be marked as solved