XBOX + Apache v2.6 + M1-ATX = problems?
I'm currently putting together an XBOX car system. I'm having some issues getting my power solution working and was hoping for some help debugging... or at least some pointers or thoughts...
Here's my current setup:
- M1-ATX DC-DC power supply
- Apache v2.6 Plus XBOX ATX converter
- XBOX (v1.6 rev) w/ Xecuter 2.6 lite modchip
- XBOX hard drive replaced with 2.5" laptop hard drive
From my understanding, the Apache module steps the 5v from the ATX molex down to 3.3v for the XBOX and is also wired to the green power-on signal wire. So far, I haven't been able to get my XBOX to power up using the M1-ATX/Apache combo.
Here's what I've tried:
Normal ATX Power Supply --> Apache --> XBOX
- I've tested the Apache ATX converter by plugging a standard ATX power supply (250 watt) and all is well. When I do this, the diagnostic light on the Apache module lights up, along with a light on the modchip. Power switch on the XBOX brings it alive.
Normal ATX Power Supply --> M1-ATX --> Apache --> XBOX
- I tapped into the 12v of my 250 watt ATX power supply, connected it to the M1-ATX, and grounded the green-power signal wire. I also plugged in an old tape drive and old CDROM drive to put some load on the ATX power supply. When connected and powered on, the diagnostic light on the Apache module lights up, but the modchip light stays dark and the power switch on the XBOX doesn't seem to do anything.
DC power supply (10-12A) --> M1-ATX --> Apache --> XBOX
- I decided to try a traditional DC power supply to see if that would make any difference: http://www.trianglecables.com/12amp12vdcre.html
However, same result. Apache module lights up, but XBOX won't power on.
I've tried jumping J8 (and J6) on the M1-ATX (external on-off switch), but that doesn't seem to make any difference.
I haven't tried connecting directly to my car battery yet. I figure if I can get this system working in a controlled environment indoors (where I actually have a TV to connect the XBOX to), I'm not ready to open the hood of the car...
Anyone have any thoughts? Since the Apache/XBOX combination works fine with a normal ATX power supply, it leads me to think there is something wrong with the way I have the M1-ATX wired, or maybe it just can't handle the load. From my calculations, the M1-ATX should be able to power an XBOX, since the original XBOX power supply was ~90W and I'm actually running less than that (laptop harddrive, DVD-ROM drive isn't connected). Do you think the problem is with the way I'm powering the M1-ATX, or do you think it has to do with the ATX power-on signal?
I've searched and found a few other threads about using an XBOX/M1-ATX combo:
But either those people had everything work right away, or weren't using the Apache module (rolling their own adapter)...
Any info would be greatly appreciated.
Ok. Got my system to fire up. Weird though.
Well I dug out my old volt meter and did some testing. The pin-out guides by "pablot" at the site listed by kevinlekiller show a normal XBOX v1.6 power supply to be pinned like this:
Here's what I measured, using both a normal ATX power supply connected to the Apache along with the M1-ATX connected to the Apache:
Normal XBOX v1.6 PSU
--- means no wire on this pin
GND means ground (as best as I can guess)
0v means a wire connected but no voltage measured
All tests were done with XBOX in 'standby' state (not powered on)
Pins listed in same order as pablot's diagrams
As you can see, neither map up exactly with what the XBOX expects (as documented by pablot), but are close. As I stated in my initial post, the XBOX works fine when a normal ATX power supply is connected to the Apache. One of the differences between a normal ATX power supply and the M1-ATX seemed to be the 1.5v on the lower-left pin. On a whim, I cut this wire so no voltage would be supplied when the M1-ATX was used. After doing this the lights on the XBOX came on and I was able to power it up. Not sure why though.
ATX -> Apache M1-ATX -> Apache
12v 5v 12v 5v
--- 5v --- 5v
5v 5v 5v 5v
0v --- 5v ---
2.6v GND 3.3v GND
GND --- GND ---
3.3v --- 3.3v ---
--- 3.3v --- 3.3v
GND GND GND GND
0v 5v 1.5v 5v
Same as above
As you can tell, I don't really know what I'm doing. But hey, I'm making some sort of progress it seams. Guess I should try to get some more info from the TribeMod guys who make the Apache module...