@Thread:

What someone suggested as a southbridge might be here, these are the specifications that match mostly what this board does have:

http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_14603_14620%5E14623,00.html

judging by this the southbridge could be controlling:

PCI Host Bus Controller

* Supports PCI rev. 2.3 specifications
* Supports PCI bus at 33 MHz
* Supports up to 6 master devices
* Supports 40-bit addressing

the two pci ports on the bottom.

USB Controllers

* 5 OHCI and 1 EHCI Host controllers to support 10 USB ports
* All 10 ports are USB 1.1 (“Low Speed”, “Full Speed”) and 2.0 (“High Speed”) compatible

there are 8 usb ports on the back of the board, might have more on a socket

SATA II AHCI Controller

* Supports four SATA ports, complying with SATA 2.0 specifications
* Supports SATA II 3.0GHz PHY, with backward compatibility with 1.5GHz

you can see 4 SATA ports on the board.

IDE Controller

* Single PATA channel support
* Support PIO, multi-word DMA, and Ultra DMA 33/66/100/133 modes

the board seems to have a PATA IDE Device.

HD Audio

* 4 independent output streams (DMA)
* 4 independent input streams (DMA)
* Up to 16 channels of audio output per stream

judging from the rear ports, this might be the audio part

LPC host bus controller

* Supports LPC based super I/O and flash devices
* Supports two master/DMA devices

this might be what manages the Compact flash port, but i'm not sure.

now we're missing the CPU and that "xena" thing.

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A1200/030 32Mb
A4000D
A1-X1000.