CR4 XL - SLIM Corona v1 - v2 Install Guide (RGH2+)

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Xecuter Groupie
Feb 24, 2003
California, USA
This CR4 XL install guide covers Corona v1 - v2 Motherboards. You can have the absolute latest version dashboard installed if you wish :)

Recommended Hardware:

(This is what I use myself in my own personal install)

  • CR4 XL
  • JR PROGRAMMER V2 (You can use a v1, v1.1 or a NAND-X and even a DemoN)

The CR4 XL Board comes with wires and tuning caps 10pf, 22pf, 30pf, 47pf, 68pf, 82pf, 100pf (the caps aren't always necessary but included for those who like to do a monster fine tune). I personally like to use the double shielded pro cables that Xecuter makes because it gives a perfect grounded line so you are guaranteed a clean wave. For less than a couple of bucks it's a no brainer - and i'm sure there are some bundle kits you can buy where it's probably thrown in as a freebie anyway.

I'm going to break this down as simple as I can. Remember CR3 PRO / SLIM PROTO and how awesome it was? Remember the install guide and the crazy long list of settings and tuning and a zillion options? CR4 XL is as basic as it gets. We took all of the awesome results of CR3 PRO/SLIM PROTO, fine tuned it to the nth degree and made the install as simple as possible and the setup as simple as possible. There's very little for you to do so I will keep this guide as simple as possible. Simple.

Oh and have you noticed there's no messing around with POST QSB's and wire lengths or wrapping wire around the xclamps or messing around with any of that nonsense any more? ;)


This will give you dead center timings for Corona. Feel free to set the 3 dip to OFF and/or to add a CAP to get the maximum performance. You really can't go wrong it's a pretty solid setup.


These fine tune the resistor on Postbit. The jumper should be set to 0 Ohms by default. In a very few minor instances a 10Ohm or 100Ohm resistor was required to shape a perfect wave (we're talking 5 out of maybe 100 motherboards - so we added the option for those cases)

This is the QSB kit for Corona installs. The CR4 XL code was designed and tuned with these installed and are highly recommended to ensure a perfect install. They also come with all the necessary connectors for NAND-X, JR-Programmer, USB COMMS Cable, RATER etc

Forgive my soldering it's a little ropey here. As you can see it doesn't get much easier than this. I will explain the dip switches and jumpers further in the guide. You can add an extra wire to K for RATER auto reset support (KIOSK).

Extra Pads: ROL is for Ring of Light LED mod, CR_EN is for DemoN Coolrunner Enable/Disable Mod etc


Flip the board. This is where the Xecuter XCLAMP Removal Tool comes in very handy. We tested all the CPU_RST points (blue wire). C5R11 consistently gave the best results with CR4 - especially when using the custom made Xecuter Double Shielded Pro Cable or the specially made IPEX CPU_RST Cable. This isn't a cash crab that's why we dumped the prices as low as we could to less than a couple of bucks (places like Xconsoles are giving them for free in bundles - USE THEM - they do make a difference with CR4). The IPEX cable is especially nice as it's super neat and tidy too.

This gorgeous cheap little tool is something EVERY modder should have by now....

You can EASILY remove an xclamp in seconds (The other sharp end is to help take apart a 360 slim case btw)


If you want to have permanent external access to the NAND, you can hook up an adapter we made a while back which is actually quite nice called the QSB EXT V3 but I think the price was a bit high so it's languishing in the back of the warehouse somewhere. I'll have a word with the boss and see if he can be nice and throw them out cheap to you guys.

If you require support for you installation, do not ask in this thread - create your own thread and include photographs with a detailed explanation of your problem. Thanks you.
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