[sdiy] Roland M-16C Memory Cartridge

[Jack Jackson]

I think so, this bro upgraded one from 16 to 64 by swapping out the IC
http://wolzow.mindworks.ee/analog/jx-10-m-16c.htm

You want to have gold edged right, so it doesn't wear off easily and maintains good conduction?

The edge connector is just an engineering problem, but I don't think it's one that's unsolvable. One could 3D print the case. I guess the cost would be ~£10 each.

If this something people on this list would be interested in, how about collaborating to solve the remaining problems and do a small run of them?

Cheers,
Jack

________________________________
> Date: Mon, 2 Dec 2013 14:22:27 +0100 
> Subject: Re: [sdiy] Roland M-16C Memory Cartridge 
> From: cheater00 at gmail.com 
> To: jackdamery at hotmail.co.uk 
> CC: synth-diy at dropmix.xs4all.nl 
> 
> 
> On 2 Dec 2013 14:17, "Jack Jackson" 
> <jackdamery at hotmail.co.uk<mailto:jackdamery at hotmail.co.uk>> wrote: 
>> 
>> Are there any examples of people building replacements for these? 
> There was this bro who built lots of new memory for Yamaha 
> synths http://www.sector101.co.uk/ 
>> 
>> This photo shows how simple the circuits are. One TC5517APL-2 CMOS 
> static RAM IC (2048 word by 8 bit), a battery, a switch, two resistors 
> and a diode. 
>> 
>> 
> http://www.joness.com/gr300/pics/M-16C/Roland_M-16C_Battery_Replacement_05.JPG 
>> 
>> I assume there is no configuration done to the RAM, it's done in 
> parallel from the synth. You can still get the RAM chips on ebay, so I 
> presume you could build a direct clone. 
> 
> I could use some more M-64C myself. I assume it's the same thing, just 
> more RAM. The question is where to find the edge connector (looks 
> nonstandard) and cartridge case (not happy with running it open, but 
> worst case you can just heatshrink). 
> 
> Cheers, 
> D.