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PostPosted: Tue Sep 23, 2008 2:18 am 
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Site Admin
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Joined: Mon Aug 28, 2006 1:15 am
Posts: 2606
Hehehe ... :lol:
Mouser then...

_________________
LS1 (foonas, nfs, Tranmission & p910nd print server, Firefly for my Roku)
LS-HG500 (Lenny)
Various LS-Pros v1,v2 (unbricked w/ serial & jtag)
KuroPro, LS2 & KuroHG (foonas)
Working on davysweather.dyndns.org lately...

=> wooohooo!
wooohooo!
Unknown command 'wooohooo!' - try 'help'


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PostPosted: Tue Sep 23, 2008 8:47 am 
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Joined: Mon May 21, 2007 11:27 am
Posts: 80
davy_gravy wrote:
RS = RadioShack?

Sorry, no, Radio Spare.
http://australia.rs-online.com/web/ Alternatively

http://www.rs-components.com/index.html


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PostPosted: Fri Sep 23, 2011 11:43 pm 
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Total Newbie

Joined: Fri Sep 23, 2011 4:25 pm
Posts: 1
Location: Finland
Sorry for digging up an ancient thread, but I just registered to share my findings as I figured out a little easier way to overclock the processor to 500 MHz.

I did this with LS Live (HS-DHGL), but seems also applicable to LSPRO (judging from the pics on the wiki), probably other Orion based boxes too.

Simply moving resistor from position R47 to R76 sets the internal CPU speed from 400 to 500 MHz. This also lowers MEM (and bus?) clock from 200 to 167 MHz, as specified in 88F5182's datasheet. (I think original clock is 2 x 200 MHz, while 500 MHz is achieved with 3 x 166).

After the mod cpuinfo shows:
Code:
root@Nas:~# cat /proc/cpuinfo
Processor       : ARM926EJ-Sid(wb) rev 0 (v5l)
BogoMIPS        : 332.59
Features        : swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant     : 0x0
CPU part        : 0x926
CPU revision    : 0
Cache type      : write-back
Cache clean     : cp15 c7 ops
Cache lockdown  : format C
Cache format    : Harvard
I size          : 32768
I assoc         : 1
I line length   : 32
I sets          : 1024
D size          : 32768
D assoc         : 1
D line length   : 32
D sets          : 1024

Hardware        : MV-88fxx81
Revision        : 0000
Serial          : 0000000000000000

BogoMIPS went from 266.xx to 332.59.

The original added oscillator method may give better performance as mem/bus speed is not lowered (but increased), but this method is simplier and doesn't require additional parts.

I already tried undocumented cpu/mem setting value 0x4 which is marked as "reserved" in the datasheet. The LS powered on okay, startup sound and all but hanged in the boot process. I'm secretly hoping this value is setting the bus speed to 200 with cpu multiplier 3, which would give nice 600 MHz clock 8-).

Already figured out voltage mod too, so maybe when I have some time I try with higher cpu voltage and see how it goes.


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PostPosted: Sun Oct 09, 2011 12:30 am 
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Joined: Sat Nov 11, 2006 10:56 am
Posts: 714
Thanks for that

was there any speed difference with smb transfers and such


I will try this on one of my DHGL's when i can be bothered opening one up


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PostPosted: Sun Oct 09, 2011 12:43 am 
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Joined: Sat Nov 11, 2006 10:56 am
Posts: 714
infact i will go do one of them now

back in 20


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PostPosted: Sun Oct 09, 2011 2:12 am 
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Joined: Sat Nov 11, 2006 10:56 am
Posts: 714
All done

root@Nas6:~# cat /proc/cpuinfo
Processor : ARM926EJ-Sid(wb) rev 0 (v5l)
BogoMIPS : 332.59

God i hate smt resistors that size
I thought i lost it about 5 times

Something is still running at 200mhz

Using UBoot passing parameters structure
Sys Clk = 200000000, Tclk = 166664740

this is the same as a non modified DHGL

i didnt look at the pdf
are you sure its not just upping the multiplier from 2.0 to 2.5


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PostPosted: Sun Oct 09, 2011 3:49 am 
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Joined: Sat Nov 11, 2006 10:56 am
Posts: 714
Its hard to compare the speed difference via smb
as i forgot to benchmark it first

but what i do know is the drive thats in there
the linkstation doesnt like (I suspect its in pio mode)
it used to be a fair bit slower than my other two dhgl's
and now its slightly faster
I think it used to do around 15-16 mb read and 12.8 write at 400mhz

I will fit the Samsung Spinpoint HD501LJ into it at some point to take a comparison

1.36 gb test file transfer via smb

Samsung EcoGreen F2 HD103SI
500Mhz
14.5mb Write
18.2mb Read

Western Digital WD5000AAKS
400Mhz
14.5 Write
17.3 Read

Samsung Spinpoint HD501LJ
400 Mhz
15.0 Write
17.6 Read


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