Overcloking the cpu

[badboy1985ro]

I read that the cpu of the thecus n1200 can be overcloked. Is there a tutorial on how to do this?
I have connected using the serial console and stoped the boot proces but? What are the uboot commands and how do i do it?

[r32190]

You can go to www.freescale.com and download the mpc8349 BSP. There are several BSPs, pick the mpc8349e-mitx-20070221.iso, would be good enough. Loop mount (or by Win Daemon) and read the BSP UG under the doc folder.
There are example to modify the core freq under u-boot.
Have fun and good luck. Once, as I posted before, the original heatsink sucks. You may refer to my previous post to improve the heat dissipation of the CPU.

[badboy1985ro]

OK . Thanks but
Why mpc8349e-mitx-20070221.iso?
I know the thecus n1200 cpu is a mpc8347 not mpc8349?
Any way. Can you please point me to the exact link cause i coulden't find the iso file. PLS

[r32190]

www.freescale.com/webapp/sps/download/license.jsp?colCode=CWF-MPC8349E_mITXE&nodeId=0127260061033202A5&location=overview&WT_TYPE=Board Support Packages&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=iso&WT_ASSET=Downloads

8349 is the flagship, it contains all the features of 834x series. 8347 is the cost down ver of its, I recall that PCI bus width fixed at 32 bit and the package is a lower cost platic.

[badboy1985ro]

Thanks alot. I will be hacking my thecus this wekend.
One more think.
If i "manage" to brick my board, is there a way to debtick it? A utility or something? like on the linksys wrt54gl wich has a jtag?

[badboy1985ro]

I almost forget.
I read your post about extra cooling the cpu.

What is the size of the heatsink you used?

I am sinking to get one the same size.

[badboy1985ro]

Are these the write commands to overclock the cpu at 400 MHZ?

cp.b FE000000 100000 40
mw.b 100008 23 8
md 100000
erase FE000000 FE01FFFF (or FE00FFFF)
md FE000000
cp.b 100000 FE000000 40
md FE000000
reset



If not can u please modify it for me
PLS

[r32190]

WAIT !!
That is an example, not your real setting. The board is an evaluation board called 8349-mITX. It core freq is 533Mhz. Your box is N1200, the core freq is 266MHz.
My N1200 is deep inside my storage room, I don't want to hook up the serial port.

1st of all, check where is the flash, may check FE000000. Then check where is the HRCW. Since the flash should be organized by a 8 bit device, so you may note that same 8 bit would repeat 4 times at a 32 bit boundary.
CCB is 266MHz, then CORE/CCB=1:1. So the 8 bit word is 02 (23 at this example). You need to change it to 23.

[badboy1985ro]

How do i check al that? Can u please give me the good overcloking code pls. I realy need it.

HELP PLEASE!

[r32190]

I suppose the HRCW is at FE000000. Check it by md FE000000.
HRCW repeat the 8 bit 8 times (my apology, not 4 times). Start from FE000008, it should be 02020202. Your should modify to 23.

Check whether 10000000 is RAM or not. mm 1000000 with arbitrary value as "deadbeef". md 1000000 to confirm.

If flash and RAM behave what I said, do it as the UG printed. But before cp.b, check the RAM content 1st. md 10000000, for value 23020202 written or not.

Don't worry, your N1200 will not brick for wrong core freq in short period of time.

[badboy1985ro]

Thanks for the info.
I will post the output Friday night. I don't wanna do anything wrong.
Thanks again.
Can you please tell me what is the height of the hit sink you use.
Also what firmware did u use on your thecus. I am searching an alternate firmware for a few month now. Something open source like OpenWrt so i can install different applications.

[r32190]

My heatsink is 11~12mm high, I guess 13 mm would be better. I use the conductive paste to fill the gap between heatsink and the case.
I don't re-flash the N1200. My opinion of using OpenWRT is unleashing the hidden features of the box, such as the USB port for non memory device. I have a ASUS WL-HDD reflashed with OpenWRT, I can hook up a USB webcam, but I lost the GUI.

After you installed the 8349 BSP, you can cross-compile any small utilites such as full boom busybox or no-ip client, or even some device drivers. I don't see any big advantage to reflash it.
You may also build the native compiler inside the box, and some utilties that prohibited at cross-compilation may get compiled.

[r32190]

Oh, missing something. The 8349-miTX-XXXX Linux version is too latest. You should rewind to use the 8349-mds-XXXX BSP to fit the Linux version of N1200.

[badboy1985ro]

thanks for everything. After a few days of googling i understand all that stuff.
I do have one more question.
Whi not changing the ccp to 333 Mhz also and adding extra cooling to the ram chips? and all the other chips on the board?

Is this a cooling problem or the board just dosen't support it?

[r32190]

The CSB (internal bus) runs at 266MHz. The granularity of the CPU PLL is 0.5 times in step. Therefore, the next frequency is 266 x 1.5 = 400MHz. You may try 533MHz, but I suggest you need high rpm fan 1st !!