Intel 300SX-20 System Board

Chipset

ZyMOS/Appian POACH 1/8

Sockets

FSB speed

20MHz

Form factor

OEM / Proprietary

Dimensions

Empty

Cache

None/Integrated in the CPU

Max RAM size

Empty

RAM type

30-pin SIMM

PSU connector

AT (P8-P9)

I/O ports

AT Keyboard

PS/2 mouse

Parallel

Serial

VGA

Expansion slots

16-bit ISA

Known issues:

Leaky Ni-Cd clock battery

The Ni-Cd battery may be leaking, risking damage to PCB layers & nearby components. Promptly remove the battery & clean corrosion/alkaline salts from the board. Use white vinegar to dissolve salts, but exercise caution as vinegar can corrode exposed metals. A thorough examination & repair may be needed. Replace battery with guide: https://github.com/wiretap-retro/Not-A-Varta