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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by skaman on 26/Jun/2017 06:42:43 PM »
I'll run some tests with my Adafruit Clock Generator setup to see what clocks work.  I know the Master CLK is pretty lenient.  I've run it at 16MHz, 20MHz, and 21.47727MHz.  I think the CIC CLK frequency is the key.  I'll try to test the limits of the range where it works.  With the Adafruit, there's a frequency fine tuning correction range where the CIC works but I didn't test the actual frequency limits.

As far as redesigning the circuit, I'll leave that up to the experts.  If people want to build my version of the adapter, then I can supply them with the 3.072MHz part.  I should have enough of the part to supply the early adopters.
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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by Matthias_H on 26/Jun/2017 10:22:20 AM »
The other two chips are VCXOs that supply the CIC CLK and Master CLK.  The clock chips are 3.072MHz for the CIC and 21.47727MHz for the Master CLK.  Since the 21.47727MHz is not readily available, I've substituted the common 20MHz version without a problem. 
Have you considered using non-voltage-controlled XO's? You should be able to find hundreds of thousands of different types on Digi-Key. It appears the system is quite tolerant with respect to these clocks, so if there is no need for precise tuning you might as well grab anything within 1-5% (or so) of the target frequency.
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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by ssokolow on 26/Jun/2017 01:10:37 AM »
I'm not sure if the adapter will go into production.  If it does go into production, then there might be design changes like replacing the VCXOs.  I built my circuit around the VCXOs after I found a supply of the 3.072MHz part.  I'm not an engineer so the VCXOs made things simpler for me.

I hope it goes into production. I'd certainly buy one.

(I never had time to build soldering skills I'd trust beyond "If I'd otherwise have to throw it out..." and, as mentioned, I'd really like to be able to stick a copy of Super Mario RPG into my retrode.)
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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by skaman on 23/Jun/2017 07:14:54 PM »
Yes, the adapter files will be released.  I'm waiting for the PCBs for the last revision.  Once I've confirmed the operation then I'll post the details.  I've already shared the schematics and prototype board layout with the other devs.

The adapter is constructed as a passthru device that sits in the slot between the Retrode and cart.  It connects some of the pins missing from the Retrode.  The circuit is relatively simple consisting of 3 chips.  The main chip is the PIC 12F629 running ikari's snesCIC (snes-lock-resync) code.  The other two chips are VCXOs that supply the CIC CLK and Master CLK.  The clock chips are 3.072MHz for the CIC and 21.47727MHz for the Master CLK.  Since the 21.47727MHz is not readily available, I've substituted the common 20MHz version without a problem.  Aside from the chips, there's a pulldown resistor and decoupling caps.

I'm not sure if the adapter will go into production.  If it does go into production, then there might be design changes like replacing the VCXOs.  I built my circuit around the VCXOs after I found a supply of the 3.072MHz part.  I'm not an engineer so the VCXOs made things simpler for me.
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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by androda on 23/Jun/2017 11:20:40 AM »
Do you intend to release the board files for the enhanced adapter?  Just curious, because I made my own N64/GBx adapter from the design files that are publicly released.
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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by skaman on 21/Jun/2017 01:05:01 AM »
Quick update.  BETA firmware with Sufami Turbo support and the BS-X Memory Pak fix is in the hands of the testers.

I'm working on one last addition which is the Nintendo Power (SF Memory Cassette) flash mapping.  My plan is to make the flash map files read only as there's too much potential to brick your NP cart when you play around with the mapping.  I'll probably make the displaying of the mapping files an option in the config file.  Once the mapping code is done then a final BETA will go out for testing followed by a full release for everyone.
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General Discussion / Re: SNES Enhanced Cart Support (BETA)
« Last post by skaman on 19/Jun/2017 09:54:50 PM »
Quick update.  I fixed the problem with the BS-X cart reading memory paks.  It is now possible to read memory paks using the BS-X cart,  Special LoROM, and HiROM carts.  I also finished adding support for the Sufami Turbo carts.

A new BETA release will be going out to testers soon.
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General Discussion / Re: Finally: New Plugins in stock
« Last post by EvilDragon on 18/Jun/2017 03:03:59 PM »
I've got a designer at hand, so if you like, I can let him design the production PCB from your schematics.
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General Discussion / Re: Desperate for a retrode
« Last post by EvilDragon on 18/Jun/2017 03:03:14 PM »
Just a quick info:
All parts are gathered, production run is planned for end of June / early July.
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General Discussion / Re: 3D Model to 3D print a new shell w/ Pi
« Last post by EvilDragon on 18/Jun/2017 03:01:43 PM »
I'll look for the 3D data, but it wasn't fully finished yet.
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