First post, by Paar
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I'm currently in the process of studying an Octek Hippo 10 motherboard (rev 1.21, but a revision 1.01 is on the way to me too) with UMC UM8498/8496 chipset. This board is quite a beauty and screams high-end so I've decided to try to unlock it's full potential. At the same time Octek boards are often badly documented, especially this one. Fortunately I managed to obtain scans of the manual for revision 1.2.
The thing I want to do with the board now is figure out how to enable PS2 support. There is an excellent thread about modding Shuttle HOT-433 which uses newer version of the chipset with PCI support. Still, I'm pretty sure a lot of the things about the integrated controller can be applied to the older chipset too. For example, CS enable pin share the same pin on the UM8498 for keyboard controller and BIOS ROM. There's a problem though - on this particular motherboard, there is not configurable resistor network. There is no pull-down or pull-up resistor anywhere on the trace.
With that I'd like to ask if any Vogoners here has a board with this chipset which has a jumper for enabling/disabling internal keyboard controller? I'm interested to know how it is wired, if there are any differences to the newer PCI chipset.