[sdiy] DIY Roland M-64C cartridge ?

[Gil W.]

Well I just got one of these M-64C and already have a M-16C here...

I think I'll part them out and reverse engineer... Maybe make a few and sell over on ebay, that could be awesome as they are so rare and pricey to get  ! 

;)


--- On Wed, 9/24/08, Bob Weigel <sounddoctorin at imt.net> wrote:

> From: Bob Weigel <sounddoctorin at imt.net>
> Subject: Re: [sdiy] DIY Roland M-64C cartridge ?
> To: gil_we at yahoo.com
> Cc: "synth-diy at dropmix.xs4all.nl" <synth-diy at dropmix.xs4all.nl>
> Date: Wednesday, September 24, 2008, 5:05 AM
> I've built an attempt at making an expander for the
> unit.  It...works to 
> the degree that you can reliably store/retrieve patches
> from 16 banks of 
> memory.  I used a Cypress chip..can't recall
> number..have more 
> downstairs.  They are a bit of a battery hog though and you
> have to use 
> a good sized rechargeable to really work a decent solution
> out on that 
> one me thinks. 
> 
> PROBLEM WAS when you'd try to do a bulk dump, something
> funny would 
> happen and I finally after building a second card and
> having the 
> IDENTICAL problem (It's totally predictable.  It screws
> up the same byte 
> of data the same way every time.  It's totally
> consistent.  Usually bank 
> A on an MKS70 loads fine.  Then things start gradually
> corrupting into 
> useless garbage) I threw my hands up.
> 
> But recently...I thought "Hey..MKS30 doesn't do
> bulk dump and they need 
> a card like this even more! "  So I tested and it
> worked fine.   So I'm 
> getting some packaging together to release that product.  A
> 16 bank 
> switch PLUS I should enable the other two data lines that
> aren't used on 
> the 16K cartridge interface that it uses so that it will
> hold 64 banks 
> of sounds!
> 
> MKS30 is a great machine that lacks one thing everyone
> would like to 
> have.  A way to store more than 64 sounds :-)  It'd be
> swell to have a 
> machine that could just read/archive Roland cards for that
> matter.   
> Hmmm.  I guess you could do it indirectly through an MKS70
> though.  
> Maybe just...after backing up the 70, load the sounds from
> the cartridge 
> which would lack the 2 bits of course if the pins are
> compatible 
> otherwise..hehe... then..just midi dump the data and on
> recalling it to 
> the 70 and loading back onto the cartridge it might work? 
> I dunno. 
> Haven't checked into that thought.. -Bob
> 
> Gil W. wrote:
> 
> >Is there any diagram/instructions existing for making a
> DIY Roland cartridge ?
> >
> >It seems like so many Roland vintage instruments use
> them...
> >
> >
> >      
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