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Sega Chihiro on Xbox - Add-on boards?

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emceebois

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The recently announced "Project Stellar" for the original Xbox by MakeMHz advertised I/O pins for Sega Chihiro support. When I asked about this, I was told that the Xbox is actually missing hardware that it would need to support more than the current three working games from the Chihiro library.

Does anyone know what hardware is "missing" on an Xbox to make it fully compatible with Chihiro games? Does it seem possible to put that missing hardware onto an add-on board?
 
The hardware would be the Chihiro specific hardware. Unless Dustin would decide to make his kernel 'virtually' support the hardware and intercept the required IO lines (for JVS, and mbcom), you'd need to attach the rest of the Chihiro 'stack' on top of it, but even then his kernel would need to support the mediaboard hardware interrupts as it's not using the normal ATA stuff - as far as I understand.

I've offered Dustin my Chihiro to play around with before in hopes of XboxHD support.

So we'll see, it's really up to him since he's the one working on the kernel and it's closed source.

As a side, the 3 games that work on Xbox already have specific support for the retail hardware. They sense when it's not running on the arcade kernel and stop trying to talk to the Chihiro hardware (JVS, etc).
 
JVS solutions are emulating the protocol not the devices that generate the protocol, but JVS isn't the only thing. There's the 2 eeproms on the base board, there's the ASIC on the mediaboard that makes the multiple parititons that it presents to the Xbox using the 1MB flash, there's RAM storage for game settings, there's the net board that has it's own flash and storage and whole thing. It's a lot of work.
 
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