Discussion about the Korg PolySix synthesizer

I did such breakout board for modern RAM chip long time ago. It was used 
in a few P6 out there, but with the advent of Kiwi6 it is not needed 
anymore. Still have them if anyone interested

Here's how it looks like:
http://www.synthdiy.eu/files/p6mem.jpg

Roman

W dniu 2018-02-12 o�19:25, axmonti@yahoo.ca [PolySix] pisze:
> 
> 
> I was looking for a CMOS ram replacement for my friend's pinball machine 
> and came across a 5114 NVRAM module 
> <http://www.pinitech.com/products/5114_nvram.php>that appears to be a 
> popular replacement for the 2114 family of CMOS RAM chips.
> 
> 
> This obviously made me think of replacing the 5514 
> <https://4donline.ihs.com/images/VipMasterIC/IC/TOSC/TOSCS32949/TOSCS32949-1.pdf?hkey=EF798316E3902B6ED9A73243A3159BB0> 
> chip in my PolySix (no battery, plus a chip available at Digi-Key 
> <https://www.digikey.ca/product-detail/en/cypress-semiconductor-corp/FM16W08-SG/428-3739-ND/4090348> 
> or Mouser 
> <https://ca.mouser.com/ProductDetail/Cypress-Semiconductor/FM16W08-SG?qs=sGAEpiMZZMtsPi73Z94q0OKOSVYv1Kg2JFUSe09H84A%3d>, 
> and extra address space for other projects); a quick conversation search 
> here didn't turn up anything NVRAM-related. The module uses a Cypress 
> FM16W08 <http://www.cypress.com/file/41731/download>, which appears to 
> be compatible with the 5514 (obviously not a drop-in replacement, but it 
> has all the requisite pins). Seeing at the "pinball" chip+adapter costs 
> a minimum of $25+shipping (for me), one could alternately use a cheap 
> SMT breakout <https://www.adafruit.com/product/1208>to mount the chip 
> and solder the required leads.
> 
> 
> The only caveat (well, the one that's documented) is that the /CE line 
> has to be toggled for every read/write operation. The 367's /CE is on 
> pin 8, which is controlled by IC25 (quad NAND gate), which is tied to 
> the write enable (R/W), /WR (pin 10), /RD (pin 8), pin 34 (p17), & pin 4 
> (/REST) of the CPU, and pin 7 of IC5. I haven't connected my logic 
> analyzer as of yet, thinking that someone here has tried to connect 
> NVRAM before.
> 
> 
> Any insight would be appreciated
> 
> - Andrew
> 
> 
> 
>