[sdiy] NVRAM for TR606?

Todd Sines sines_list at scale.la
Sat Apr 1 15:11:43 CEST 2023


Sadly here’s the deal… You could try Paul Barker on the RE-808 and RE-303 FB groups where is very active as well.

I know he’s pretty absorbed with the RE-101 at this time.


Todd

https://shop.re-303.com/product/pixie-powered-re-cpu/
> DUE TO SUPPLY CHAIN ISSUES, 
> 
> Unfortunately due to supply line shortages we are temporarily forced to limit supply to kit builders. Kits that require pixie cpus are now bundled and priced accordingly. If there is excess stock it will be listed here.
> 
> The Pixiepowered RE-CPU is a D650C emulator, which will allow you to run original maskrom firmware from original Roland(tm) machines.
> 
https://github.com/sunflowr/recpu


> On Apr 1, 2023, at 8:59 AM, kenny at beatkamp.com wrote:
> 
> 
> Hi Brian,
> 
> In this specific instance, the Pixie implementation for TB-303, TR-606 (and I believe
> but cannot confirm TR-808) from Paul at RE-303 negates the need for external RAM.
> This is internalized on the CPU itself. The Pixie is running the original Roland
> code with a tiny bit of MIDI stuff hung on to it. ie) D650C emulator
> 
> Cheers,
> ./k
> 
> On 2023-04-01 01:26, brianw wrote:
>> Do you have any data sheets or part numbers for NVRAM?
>> Last time I checked, they either have a battery built-in, or they require different code to work with SRAM interface timing. In other words, I don't think you can retrofit. If someone has a part number that would work, I'd like to know how it works.
>> The other solutions people are talking about use a new CPU design where the code can handle modern non-volatile memory.
>> Brian
>> On Mar 31, 2023, at 11:36 AM, antti.s.pitkamaki--- via Synth-diy <synth-diy at synth-diy.org> wrote:
>>> I hate leaky batteries. Does anybody know if there is an NVRAM solution for the Roland TR606? I don’t want to keep batteries in it, but it looses memory contents without them…
>>> At least for pinball machines some have replaced the original volatile memory chips with NVRAM equivalents, but googling about a solution for the TR606 yields nothing.
>>> Cheers,
>>> Antti
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