PPG 2.3

[riccardo]

Hi everybody,
seems we have PPG 2.3 spare parts wanted!
I do not look for the operating system, but i desperately seek for the
programmed PAL integrated circuit, or better the programs they contain on a
floppy.
If one of these PAL fails the machine is dead, and I have not been able to
copy them.
I have been told it is impossible.
So I need the chips or the program.
Thanks.
riccardo