It seems this board came originally from Italy, look at the text "CAFAGGI" on the rounded sticker.Cafaggi was a big italian distributor/importerYes you need 12 * 27C040.And there's a mistake, the resistor is 2 ohm but can be substituted by a piece of wire.While googling for the IC's needed I stumbled upon this post in which our friend @Apocalypse explains the conversion.
My French is not great, but in any case it states you need 12x EPROM type 27C040, but also a 10k resistor?
Can anyone confirm if this is still needed?
He also says there are 2 versions of the Squash PCB (922804/1 et 922804/2) and he only confirms the latter is working and can't guarantee that the first revision works.
Any info on this would be appreciated
I'm not sure what is the difference between 922804/1 and 922804/2 but they look visually identical.
[EDIT]
Here's my converted board:
And a video of it running: