By some strange quirk of fate, I have a board in front of me with the same BIOS / Board identifier as the 2 people above. (not mine, a friend who asked me to look at it)
However, as well as the 830 CN, Jetway made an 830 CF, in 3 revisions, 1.0,2.0 & 3.0.
The board I have is a 830 CF Rev 2.0 (this is stamped quite clearly on the board near the 2 DIMM slots.!!)
It still doesn't have any ISA slots but it does have on board LAN and VGA but also an AGP slot.
It also does have a 100 or 133 MHz FSB set by a jumper S1 which is behind the DIMM slots nearer to the edge of the board. (100 when open - [default] 133 when closed)
The Maximum CPU speed can be found on the Jetway website as indicated by harrack52 earlier, but you need to find the board Revision and a BOM number which is on a yellow label on top of the I/O ports on the board.
Also on the site are BIOS downloads to version A10. (I see yours is A09 shawncy!!)
Finally, and I hope some of this is useful for you, I have managed to download a full 56 page manual from Jetway which covers the 830 CN / 830 CH & 830 CF motherboards all of which use the SIS 730 chipset.
This link should get you in the right vicinity to find what you need
http://www.jetway.com.tw/evisn/index.html
but be aware, in the manuals section there is just one download site, Asia.
Didn't seem to work, but the Bios download and Drivers did from Asia2, so I ftp'd directly to the ip address in Asia 2 and changed to the manual directory and found the same file. I guess someone must have moved the data at some point but not updated the link.
In summary there are numerous possibilities as to what the maximum processor possible and you need to find the board, ie. is it 830 CN, CH or CF, the Revison number, ie. none 1.0, 2.0 or 3.0 and the BOM number. Only then can you find the max CPU.
This one I have is a 830 CF, Rev 2.0 with a BOM no. of 04 making it 1.4G Duron and 1.4G Athlon 100 or 133 Mhz FSB.
Most Rev 3.0 boards seem to go up to 2400+ Athlon XP's.
Sorry for the war & peace, I'll make it brief next time.
Hope something is of some use.
PS First time user here and just found whilst editing my typo's that you can upload attachments so I have uploaded the pdf Manual.