This was working when removed from a PC, but that was ~30 years ago

It's been well stored but I don't have any way of testing it so it's sold as seen, no returns etc 

I will be selling off a lot of motherboards, kindly see my other auctions

PCM-5894 / 5892 A3.2 

The Advantech PCM-5894 / PCM-5892 is a vintage single board computer (SBC) motherboard—commonly manufactured or branded across Aaeon, Advantech, and Emac—utilizing a Socket 7 form factor and legacy industrial architecture.

Key Specifications

• CPU Support: Intel Pentium MMX (166–233 MHz), AMD-K6/200–266, Cyrix/IBM 6x86MX, and IDT WinChip C6.
• Chipset: SiS 5598 (PCM-5894) or SiS 5582 (PCM-5892).
• Form Factor: 5.25" single board computer format (approx. 5.25" x 8") with a PC/104 and PCI expansion slot.
• System Memory: 8MB to 128MB via two 72-pin SIMM sockets (supporting BEDO, EDO, and FP DRAM).
• Cache: Onboard 512KB pipeline burst L2 cache.
• Storage & Interfaces: Enhanced IDE (supporting up to two drives / Ultra DMA/33), floppy disk interface, DiskOnChip socket, four serial ports (RS-232/422/485 options), and a parallel port

INTEL CPU P54C P55C
AMD-K8
2.1V - 3.6V
CPU CLK 40-75 MHz
PCI CLK 25-33.3 MHz