Custom-built multi-bank Roland M-256/M-512 memory cards

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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby fh991586 » Tue Aug 28, 2018 5:55 pm

5V Smartmedia cards seems a lot more difficult to get than any 3.3 version!
Considering parting away from:
-Roland TR707
-DSI Mopho
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New batch in the making!

Postby dojoe » Tue Sep 04, 2018 1:15 pm

Look what came in the mail today:

Image

168 memory cards, assembled but still on panels. I'll have to find the time now to perform the final assembly steps (break the cards out of their panels, add guard wires to protect the slide switches, configure the cards into 8x512 or 16x256) and most importantly test all those cards. Once I've got enough stock of completed cards, I can start taking orders -- around the end of September maybe?

Thought you might like to see this :)
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby mannys » Sun Sep 09, 2018 10:15 am

That looks very exciting. Will be keeping an eye on the email.
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And we are live!

Postby dojoe » Sun Sep 30, 2018 10:17 pm

dojoe wrote:Once I've got enough stock of completed cards, I can start taking orders -- around the end of September maybe?

Quite literally so - 50 minutes to the end of September to be precise! :lol:

We are taking orders again!

I have 93 cards tested and ready to ship, with another 50 almost done. Hop on over to https://sagamusix.de/other/roland_memory_cards/ and place your orders :)

Like last time, the cards cost 79€, shipping will be between 5€ and 40€ depending on where you are and whether you want insured shipping.

Orders will be processed in the order they arrive. There is no maximum quantity, but if you order more than three cards I might ask you whether you're serious ;) When you receive an invoice from me, cards have been reserved for you and will be shipped once I receive your payment. Once stock runs low, I might retract invoices if they're not paid within seven weekdays to free up cards for others, so better pay up :P I'm running this as a side gig, so please allow a few days for processing orders and shipping - that said, I'm going to be as fast as I can, modulo weekends.

For any further info (including a small Manual and FAQ), head on over to the order page: https://sagamusix.de/other/roland_memory_cards/
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Re: And we are live!

Postby dojoe » Thu Oct 11, 2018 8:28 pm

dojoe wrote:shipping will be between 5€ and 40€ depending on where you are and whether you want insured shipping.

Good news! We found (as in "were pointed to") a much cheaper shipping option so we can offer worldwide shipping with tracking and insurance for 10€! The 5€ option without tracking and insurance will also still be available.

We'll update the order page accordingly soon, but any new orders will get the new shipping prices starting now.

Thanks a lot to baz99 for letting me know about this option!
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby JMG » Thu Dec 13, 2018 6:01 pm

I have a Roland VG-8 Expanded and I'm interested in helping you make the card compatible with this unit.

Are you still interested?
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby dojoe » Thu Dec 13, 2018 6:32 pm

JMG wrote:I have a Roland VG-8 Expanded and I'm interested in helping you make the card compatible with this unit.

Are you still interested?



It would certainly be technically interesting, but I don't have the time any more to spend on fully figuring the VG problem out, changing the card layout and going through some testing to make sure I'm not breaking other devices.

Sorry about that.
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby Chris73 » Sat Dec 29, 2018 2:37 pm

Hi

Just a little wonder about the write protect mechanism used on the original card; if someone could answer it just for my personal culture ;-)...

On the D-50 connector, there are two pads dedicated to write protection : n°20 ( M/R ) and 21 ( WE ).
Is W/E only a command line from D-50 to card, and M/R the line which tells to the synth the card is protected ( as it was told somewhere on this post ) ?
In this case, I can't figure out how it is supposed to work...the schematic given on 'Vintage Box' is confused.

Thanks for any info

Chris.
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby dojoe » Mon Dec 31, 2018 2:17 pm

Chris73 wrote:Is W/E only a command line from D-50 to card, and M/R the line which tells to the synth the card is protected ( as it was told somewhere on this post ) ?

The WE/CE/OE lines are control lines from the synth to the RAM chip - it's a typical SRAM interface, even though the polarity of CE is reversed compared to the industry standard of a low active !CE.

The MR line is the write protect going back to the synth from the card. Connect it to the 5V supply to enable writes to the card, connect it to ground to prohibit writes.
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby Chris73 » Mon Dec 31, 2018 2:26 pm

Ok, thank you for these infos dojoe ...

Congratulations for tour great work. And happy New year or course !
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby BlackGnosis » Sat Jan 05, 2019 9:30 am

Much want... I hope to get a card for my JV1080.
Image
Ashe37 wrote:I find it funny that you're a guitar pedal snob and yet don't own a single analog synth.
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby vbyte » Tue Jan 08, 2019 9:31 pm

ʝɵʝɵ wrote:Custom-built multi-bank Roland M-128/M-256/M-512 and Akai BR-16 / BR-32 memory cards

Image

Cards are currently out of stock! - Sign up for the third batch at https://sagamusix.de/other/roland_memory_cards/ - this is not a binding pre-order, you just sign up to be informed about the availability of the next batch.

The cards will most likely cost 79€ each, shipping will be between 5€ and 10€.

For any further info (including a small Manual and FAQ), head on over to the order page: https://sagamusix.de/other/roland_memory_cards/




The original story:

So, as everyone knows, these old M-256 / 32KB and M-512 / 64KB RAM cards for Roland synths (I'm sure the same applies to others as well) sell for ridiculous prices (like 50€+ on ebay), given the amount of RAM you actually get. We want to change that! :)

To be precise, I always wanted to have quick access to multiple memory banks in my Roland D-50, but I'm not aware of any cheap off-the-shelf solutions, so I was reaching out to a friend to help me make this dream come true. We are currently planning out things, and have decided to go for a custom card with MRAM chips (so it won't need a backup battery) with a built-in bank switch. This makes it easy to have access to many sound patches without having to constantly switch between banks via SysEx upload.
Once we can confirm that this design works, we want to make other Roland synth owners happy, too. It would be interesting to know if there is any demand for such cards, so please post here if you're interested in getting one.
We cannot give an exact price for the cards yet, but you can expect that they won't cost much more than what you'd pay on eBay for an original card, while providing 16 times the space.

Our new cards should work as a replacement for all M-128 / M-256 / M-512 card revisions, they have been confirmed so far to work as a replacement for revision D and E (i.e. M-256D and M-256E).
The memory cards also work as Akai BR-16 and Akai BR-32 replacements!

Subscribe to this thread for updates.



Hi I would like such a card where can I order them
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Re: Custom-built multi-bank Roland M-256/M-512 memory cards

Postby ʝɵʝɵ » Tue Jan 08, 2019 9:33 pm

The first two sentences you quoted include all the information you need to know:
- Cards are currently out of stock!
- Sign up for the third batch at https://sagamusix.de/other/roland_memory_cards/
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