WTB/WTT Original XBOX version 1.5 motherboard

I have always wanted a 1.5 motherboard. Everytime I get a 1.4 in front of me I cant wait to put he multimeter on it and find a 1.5 but I have not got that lucky yet.

I would really rather trade for it but I am open for buying it also if needed. I have a lot of XBOX motherboards from all versions besides the 1.1 and of course the 1.5 in case you need a motherboard back.

 

Seems most think the 1.5 was more of a myth than a the real deal. Many say it was nothing more than older boards that went in for service work and got retagged as a 1.5. Others say it was a very short production run before MS decided to move to the 1.6 boards. There are many other urban legend stories about it. I've seen all but the 1.0 and 1.5 revision so I can't say what's true or not.

 

I've modded 1000s of Xboxes and had never seen a 1.5, if anything I believe it was a defect.

 

I believe that N64 freak told me he ran across one before and confirmed it with the multi-meter on pin 2 from the LPC. I am gonna send him a email confirming that it was him that has run across it. Anyway I guess they are as rare as I thought.

I had a chance to get one about 5 years ago and the price was not bad either. I should have grabbed it! Does anyone know if they came in black consoles only? Possible date?

Hey sonicdude, I cant believe you have not seen a 1.0 board! Man that seems to be all I run into lately! I have 8+ 1.0's and only 2 1.1's and 1 of them has the 1.4ghz and the other has the 1ghz. I never seem to come by the 1.1's at all! I had got both of the 1.1s with the upgrades.

 

Well I have the debug you're sending me that's 1.0 as well as 2 retails coming from a friend in Tennessee that I suspect are 1.0 based. Maybe I'll finally have some 1.0 boards and will just need t osee the 1.5 like you. Still hate the 1.6 boards. Only reason I'd have one working is to keep a 64MB system on hand. I believe all 1.0 through 1.5 boards should be 128MB modded. Not right to deny them the full RAM count when the spots for the chips are on the board and ready to go with all the resistors and such.

 

There are enough broken Xbox motherboards out there to supply 128 MB modders for quite a while.

I've only ever seen four motherboard types:
v1.0 / DVT4 (both in its retail and debug variants).
v1.1? Seemed to be right after v1.0 - had new MCPX ROM using TEA hash, no USB daughterboard, still Conexant.
v1.4? Looked just like v1.1 but had had Focus instead.
v1.6 / XBLADE

I've never seen a debug besides DVT4.

By the way, Chihiro is based on XBLADE/v1.6.

 

I have 2 chihiro motherboards and 1 of them is a 1.1 and the other is a 1.2 or 1.3. They both have the 1.0 heatsink that has the fan on it also. I will post some pics in a little bit if anyone wants to see the chihiro boards. I just shipped them to N64 freak so he can take the TSOPs and eeproms and dump them! I wanted to get a board with a MPCX 2 with a X3 mod chip so I can try the chihiro games with that motherboard to see if they work better. But I traded him the boards for a 1GHz 1.1 version retail board that had the RAM upgrade done already. I kinda wish I kept them but I wanted the 1GHz.

 

The only difference between the MCPX X2 and X3 is the hidden boot ROM. If you flash a debug kit with a retail flash, except replacing the last 512 bytes with a copy of the hidden MCPX X3 boot ROM, and flash the EEPROM with a retail EEPROM image, the debug kit will act fully retail and will not know the difference. I know this because I've done it. =^_^=

Hmm. The only ROM dump I have of a Chihiro uses the Xcodes from an Xblade; that's what I was basing that statement on. Its Xcode table exactly matched the one in xboxrom_xblade.bin for debug kernel 5455.

 

That's really interesting to know! I also thought Chihiros only used the later motherboards.


Take this with a grain of salt.. I'm uneducated about version numbers - these are just my thoughts about the whole thing:

If I remember correctly, I read somewhere that the Xbox was only given to Sega around March 2002. So only then Sega can have started with actual testing / work on the hardware.
With the first Chihiro games around early 2003 (Please correct me on this) it seemed plausible to me that they only used 1.2 Xboxes and up for retail Chihiros with very few 1.1 Xboxes.

A 1.0 Xbox motherboard in a Chihiro would suggest that the motherboard was produced until 10/2012 - with the above in mind it would appear that the Xbox motherboard would have been unused for a couple of months before being integrated in a Chihiro?!

If there are more Chihiros with a 1.0 motherboard, Microsoft probably didn't "trash" (what nvidia said.. or they were told) all of the old unusable motherboards ("after the MIT Hacker"), but gave them to Sega?

Where did you get those Chihiros?
- Maybe they were created from leftover parts and returned debug kits or from internal testing at Microsoft / Sega? Maybe also actual Chihiro development kits?!

//Edit: Also very intersted in the dumps - will they be public?

 

When i get the boards i will get everything dumped thats possible.
If anybody has any special questions about it or wants high resolution Pictures of the motherboards i will open a Thread for the 2 Boards.
All the information i'm allowed to publicly share will be in the Thread. The Kernel and EEprom Dump will surely help understanding the chihiro.

@Fox
I will let you know as soon as i have the boards and could dump the eeprom and Tsop!

 

Me and N64 freak worked out a deal and he owns the boards now. But he asked me before I traded them if I wanted the info to be shared and I really wanted it that way! I do not get a chance to give back to often and I love the chihiro project that you guys are doing.

On a side note I contacted the guy I got them from and if he gets more he will sell them to me. I got a couple of debugs from him and this guy mainly selld parts of arcade machines for a living. I have no idea were he gets the stuff. Sorry I could not help more on that note.

 

Just wondering what the sticker says, from afar it looks like the sticker that are on the prototype mobo's.

 

There is a dump of the chihiro bios available, I don't remember which kernel version it was though. I think I used a 1.0 rc4 to extract the kernel

 

I dont have the boards anymore here to look at the sticker. But in the chihiro on xbox thread I did list what the sticker said about 2 weeks ago I think. Look for my name and all that info is there. N64 freak told me it is not a kernal that has been recorded yet and that is why he wanted them so bad. I traded him the boards for a upgraded version 1.1 1GHz 128 RAm board. I have the trusty 1.4 already but wanted this one also for my collection. The trusty in a blue case with a X3 and the X3CP and the N64 board is in a clear case with a X3 and X3CP. I know I have a sick obsession with the X3 chip and those X3CP faceplates! They look so darn cool! I wish I could get my hands on the green one! I have the black also already.

 

I have four Chihiro boards I thought were debug mobo's when I bought them. Borman and HEX1GON confirmed they were in fact legit Chihiro's.

 

BTW N64 freak has confirmed that he has had a 1.5 retail board in his possession at on point in time. He confirmed that pin 2 on the LPC was not grounded. I wish he still had it though. So the 1.5 does exist. He does a ton of modding and upgrades and I really feel his word is trustworthy.

 

1.5 boards are real, just the difference between them isn't that easy to tell.

Chihiro motherboards are the modified debug motherboards

 

Hey guys, newbie here. I came across an old xbox that I disassembled for parts, and I believe may be a v1.5 motherboard. (MFG Date of 9/16/2003)

I am not that skilled using a multimeter (I know I know!). I have a cheap one to test, but I'm not sure what settings to use or the node placement? Red to the pin and black on the motherboard screw plate (ground) right?



Hoping someone could give me a little better picture on how to properly test this.

This is the multimeter I have:



Thanks

Dre