hello
I'm the owner of an MTX512 + FDX and during my research of spare parts I found theses chips for Commodore 64-128 in the store of a 80s repair shop.
Just one 8721 was installed, the other chips are "brand new". I have no possibility to test them.
I don't need these chips and maybe some of you are interested ? I just hold the Z80B.
I will sell or I exchange them for MTX items.