DX7S - Will the II/FD carts work?

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grantb5
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DX7S - Will the II/FD carts work?

Unread post by grantb5 » Tue Apr 16, 2019 6:23 pm

I have a DX7S in pieces but it's coming together. I want to test out the cartridge functionality but I don't have one, nor do I have an ADP-1 (or is it ADP1? I know Yamaha is less with the dashes than Roland). I would be happy to pick up either a ROM or "RAM" cartridge at this point but I need to know what to look for. So, does it have to be DX7S specific or does a II/IIFD cartridge work in a DX7S?

Also, if anyone knows the difference ... are the cartridge CT pins different between the DX7S and DX7II/DX7IIFD? I'm kind of curious about the ADP1 since it's so expensive. Like what's the pinout going on in there? I don't see a Service Manual for it.

Maybe there is a FAQ someplace? RAM/ROM/RAM4/RAM5 ... how many different types did Yamaha make?

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Sonus
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Re: DX7S - Will the II/FD carts work?

Unread post by Sonus » Wed Apr 17, 2019 10:00 am

DX7s factory ROM voice & performance data ...

DX7II/DX7s use a RAM4 (16K) or RAM5 (16K x 4) cartridge with format ...

DX7-2 : 64 Voices - 32 Performances - 2 Micro Tunings - System Setup
FKS-Y : 64 Fractional Scalings
MTT-Y : 63 Micro Tunings

DX7II/DX7s can access 16 banks, AFAIK no one ever built such a card.
The next RAM card series were MCD32 (V50) and then MCD64 (SY77).
As you probably know, ADP1 is read-only, RAM1 has only 4K memory.

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Re: DX7S - Will the II/FD carts work?

Unread post by grantb5 » Wed Apr 17, 2019 2:16 pm

Thanks! There are lots of web pages, but very few mention the DX7S.

So as far as ROMs are concerned, ... as long as it's a "big" one (physically) then it should be OK? Obviously if there are drrum machine ROMs I will avoid those.

I also saw in my searching that there is an ADP2, but it's not related in function for me.
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Re: DX7S - Will the II/FD carts work?

Unread post by Sonus » Thu Apr 18, 2019 1:00 pm

You're welcome! They might demand crazy prices for these VRC cartridges, unfortunately not mine... :geek:

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Re: DX7S - Will the II/FD carts work?

Unread post by stickman » Thu Apr 18, 2019 4:29 pm

Hi

Yamaha DX7II Carts will work in the DX7S. But only the voice data, not performance data. I could be wrong though as it's been a long time since I had a DX7S. I now have a TX802. Cartridges available for the DX7 MKI will work as long as you have an ADP1 cartridge adaptor, as DX7 MKI cartridges are a smaller size.
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