XBOX XDK usb port?

Hi,
I got an XDK Xbox and wonder for what the usb port behind the case is?
Is it for service or why is no useage for it?
Any infos ?

 

i was wondering the same thing the other day and almost posted.

I came to this conclusion based on absolutely no facts and whatever i thought sounded nice and seemingly made sense, so remember when your reading this, this is what i think to most likely be the case.

the daughter board in the top wasn't made by Microsoft, it was bought from i think Rapter, (they made xdk dvd emu card). there card had a usb port, rather then them make custom ones withought the usb port they just sold ms therer regular ones they used in other devices. ms probably didnt want devs utilizing the usb port since there was no reason because retails dont have it, so rather than create confushion they just blocked it of by plastic.

 

I want to say it was uncovered in DVT3s though, been a while since I had one though.

 

i have also one with covered usb.
Someone told me in the past, that the usb-port
is for biosflashing. But i don't know if that is right.

 

So can someone confirm that the DVT3 has an open USB Port?

 

Ask Old Engineer hes got like 3 of em.

 

Correct, DVT-3 has the USB port uncovered and DVT-4 is covered. As far as I know the DVT-3 was used alot by companies making things for arcade so maybe this is why the port is uncovered?! Parris will know for sure!

 

Cheers for the enthusiastic reassurance that I'd know lol

It is indeed for arcade though. Respect where it is due, I seem to recall that it was actually Old Engineer that solved the problem.

It looks like a USB port, but is actually a JVS port.

JVS in arcade is a control panel connector using 4 x connector and therefore the existing USB port was an ideal solution to the quick release connector. You'll also find JVS on other arcade systems, such as the Naomi. If you look at the top of the motherboard you'll see a dual JVS port. Both work!

So, the JVS found on the rear of the DVT3 was presumably used in early development of the Chihiro system.

OE will no doubt step in and correct me if I am wrong, but the Chihiro is actually based on the Microsoft Xbox debug motherboard. If you look in the MS section you'll find images I posted. I've actually got access to one so may take better pictures soon.

One the DVT4 the JVS port is covered. Three ways to tell the DVT3 and DVT4 apart. Most DVT3 units I have ever seen have METAL Xbox badged on the top, whilst all the DVT4 are plastic Xbox badges, the version of XDK and lastly that JVS port (covered or uncovered).

 

This is the daughter board on a Chihiro I took apart recently. Note the JVS (USB) port on the far left. It connects directly to the I/O board on whatever arcade system you were fitting it too. The I/O board then has a loom to the various controls, such as sticks, buttons, guns... whatever the game requires.

I really should take better images, this (and the others) were taken in a sprint to the finish take down. I had 5 minutes to disassemble and reassemble a full system before the van arrived to collect it.

 

Very nice infos! Thanks Parris!

 

thx also, so then my info was definite wrong!

 

Just wanted to confirm with a picture of my old DVT3

 

Dear friend

Do you think also can I use DVT 4 like I/0 board for Chihiro?

Thank you

 

Probably not.

 

Thanks

Why need some info please.

 

The DVT3 and 4 contains 2 extra boards, I own the dvt4 and 1 with the Serial basicly only adds a serial port to the LPC bus.
the other board actualy is between the motherboard and the dvd/hdd. Its contains an fpga and some exta's. but basicly I believe it can act like a normal DVDdrive for the xbox (and deselcting or disabling the installed one)
it recieves its DVD contents over the SCSI port from the PC.

The USB port actualy is connected to a male header next to the usbport. its not connected to anything and is ... useless in a dvt4. not sure about an dvt3, maybe on the pcb in a layer between its connected to the fpga or something, but not connected in my dvt4 (dvt4 recieved from borman) maybe more people can confirm or prove connected to something or data from usb port. did not yet tried myself.

For Chihiro you want the connector info on the motherboard and maybe devices connected on the lpc bus. Serial is nice for debuging if enabled on a chihiro, dvd emu is I believe not realy usefull as Chihiro uses diferent media. the lpc bus is nice to use for booting a diferent bios. the serial board actualy also contains pcb placeholders for a bios like chip and 2 PS2 contetors (But for what use? Linux? expensive Tux box u have)

Anyway, here is a picture that I took 3 month ago. I have more, but ill post them later, when my own website gets a new cms.
then ill post more pictures and info that I found as well some more xbox software ive found. also without the namestamps on. I always like pictures without fullress, so if anyone is intrested, ill up them quicker. original size was 3072x2304.

By the way, somehwere on the internet and also here was a question about the LPC chip used for the Serial. its a LPC47M157-NC
properbly programed or set to certain settings, but not sure. also pictures taken.

 

Dear friend

two pictures:
http://www.llamma.com/xbox/Mods/images/devkit/XDK4.jpg
http://pinball.kicks-ass.net/photo/...303232372e4a5047&dir=53454741204368696869726f
We can see this two card are very similary. I think via USB and VGA use Xbox, for the driver we can use phoenix bios loader and chihiro bios.

 

Chihiro board has replaced compeltly the IDE bus, its properbly replacing the HDD and dvd with GDrom or whatever its using.
Is there a picture of the back? I only see a Cypress chip with SRAM. wich is properbly used only for the IO on top. If the chihiro has VGA we realy need to know whats on the back. I see a LPC cable, this means that on the back there is a CHip and/or Bios.

This chip maybe controls the Xbox board to its willing. according to a post by Bunnie Huang you can control more than the bios with this LPC on the xbox.
He just never released ir finished his custom LPC device. I see also power connected to this board, so it properbly controling on/off dvd status and USB aswell. Lets say you can run a Chihiro bios with a DVT3/4 or debug kit. we need to know what happens on the LPC bus.
The DVD emu is not very helpfull I think, if we gonna replace the external GDrom and/or board, we need to put games on HDD or not only Emu dvd, but make it apear as a Chihiro board with gdrom. (I asume it was a external gdrom drive here.)

So, the USB is not realy connected to anything, looking at my own pictures. and the other board, the one with the lpc? its only adds a serialport by the LPC47Xxxx-XX (I have pictures, full datasheets. will up soon)
The smaller board is not MS, the DVD emu is MS, maybe made by diferent company but the Serial board contains pcb placeholders for PS2 mouse/keyboard, BIOS and some debug extra (MCPX,TV,Temp and POSTCODE) output headers to a non populated DIP28 chip.

I just moved to a new home and am ready to setup my dvt4 again. So can test the usb, but I believe mine is not connected at all (GND and VCC is, but data not. its properbly JVS, so no use for me.)
Want to see the chihiro boards backside please

 

just incase, here is my photocollection. its not the highres yet, but you can see the USB internaly, not connected
http://codeasm.com/xbox/images/dvt4/

 

Dear

For GD rom my idea is ti use SCSI port, connect xbox with Dimm board and launch dump .xbe from HDD.
http://dk1.ti1ca.com/get/92.154.117.153/t27daehs/DSC00262.JPG


back :
http://dk1.ti1ca.com/get/92.154.117.153/qenziud0/DSC00244.JPG


I think we can deconnect motherboard of chihiro because the base board is connect with Xbox, the Xbox is the new motherboard in this configuration.

All information here:

http://mamedev.org/source/src/mame/drivers/chihiro.c