Colecovision: Mixed memory, 4116 and 4516/4164...

[Mauro72]

Hi friends,

Is possible to mix those memory chips? I know, +5v in 4116 is leg n9 and in 4516/4164 is n8.

So redirecting the +5v from leg n8 with a wire to pin9 and cutting leg 1 (-5v in 4116) and leg n8 +12v to +5v... may be work?

In 4516/4164 leg n9 is A7, no needed for coleco... is correct?

Thanks!

[towmater]

You are correct, you need to bend up the pins so that they don't receive -5v and +12v and tie the unused address line to high or gnd so that they don't float. I'd suggest testing the chips before doing the hack.

[nanochess]

I suggest strongly to put sockets for RAM chips.

[Mauro72]

I suggest strongly to put sockets for RAM chips.

Yes, its ready. I have socketed VRAMs, VDP, Z80, 1889.