There doesn't seem to be much information about overclocking or underclocking the 110, so I figured I would do some research and start up a discussion.
In looking at how other netbooks are changing their CPU clock speeds, I found that the "SetFSB" utility (http://www13.plala.or.jp/setfsb/) was quite popular. In particular, it had been used to overclock a HP 2140 (read about it here: http://www.hpminiguide.com/forums/viewtopic.php?t=2421), which really got me thinking about what could be done with the 110.
Step 1: Clock Generator Identification
The first task is to identify the clock generator IC. After doing some digging, I found the "HP Mini 110 Disassembled" thread (viewtopic.php?f=34&t=1732) by forum user "brotato". As luck would have it, brotato posted some really high resolution pictures in good lighting, and I was able to find the clock generator IC on the motherboard and read the part number!
Here are two of brotato's photos:
... and with a bit of work, here is what I was able to pull out of them:
So there we have it. "ICS 9LRS3165BKL" is the part number of the clock generator. Thanks, brotato! 8-)
Step 2: Clock Generator Datasheet
A Google search for "ICS Clock Generator" reveals that "Integrated Device Technology", or "IDT", is the manufacturer of the chip. IDT has a website at http://www.idt.com/, which happens to have a pretty good search engine in their support section. While the search doesn't quite find the exact part number, it comes up with two which are very close:
9LRS3165BKLF (http://www.idt.com/?partID=9LRS3165BKLF), and
Both are listed as the generic part 9LRS3165.
Aside from what is available at the links above, I was unable to find a datasheet for any of these ICs. :| If anyone else has any luck, please let me know!
Step 3: Software Support
At present, the latest version of SetFSB (Version 220.127.116.11, 10/29/2009) does not support this clock generator. I have tried selecting a few of the similarly named ICS clock generators in SetFSB, but they are not similar enough to work.
I plan to email the SetFSB author to see what it would take to support this IC. If I hear anything back, I'll post it here.
Otherwise, I have not found any references to any other software that can work with this IC...
... So that's where I'm at! If you have any more information, suggestions for other software, or just want to check in to let people know you are interested, feel free to join in on the discussion. 8-)