685 Revision E Overview

Note
This motherboard is currently under engineering revision. The information contained in this overview is subject to change.

Battery Socketed 3 volt Lithium coin cell battery at location BT5G1.
BIOS Flash EEPROM - AMI BIOS
Plug and Play 1.0a spec., support for Windows 95.
Bus Architecture PCI 2.1/ISA based system bus
Cache 16K level 1 cache
256KB Pipelined Burst Cache which is soldered on board and not upgradeable.
Some models will have no level 2 cache.
Chipset PC87306B Super I/O Controller.
CPU MMX Pentium 166 MHz
MMX Pentium 200 MHz
MMX Pentium 233 MHz

The following CPUs are also supported as Pentium only (non- MMX):

Pentium 75 MHz Pentium 133 MHz
Pentium 90 MHz Pentium 150 MHz
Pentium 100 MHz Pentium 166 MHz
Pentium 120 MHz Pentium 200 MHz

Uses Type 7 CPU Zero Insertion Force (ZIF) CPU Socket. Supports Pentium Overdrive.
Interfaces Serial DB-9 Serial port for COM2
Parallel DB-25 Parallel port
Keyboard PS/2 keyboard port
Mouse PS/2 mouse port
S-Video I2C and S-video IN
USB Side-by side USB connector
RCA RCA Jack for NTSC/Pal video IN
VGA DB-15 VGA port
Soft On/Off 4-pin locking header
I/O Box 4-pin locking header
FDD Connector 34-pin on-board header connector
HDD Connector 40-pin PCI IDE (fast PIO-4)
HDD Connector 40-pin PCI IDE (fast PIO- 4)
VESA Feature Connector 34-pin header connector
Infrared Serial Connector 5-pin header connector
Sleep Mode Support 2-pin header
IRQ Availability 5, 10,11, 15

The available IRQs may vary depending on the system configurations. When determining available IRQs always check for printers, sound cards, CD-ROM drives and any other devices in the system.

Network Certification To be determined.
RAM 8MB installed standard/128M maximum
Uses 4/8/16/32 MB 72-pin SIMMs, ó0 or 70ns, EDO or Fast Page RAM
Supports only non-parity DRAM
Speaker On-board piezo speaker.
UART Two 16C550A Compatible chips
Video S3 Trio
PCI graphics controller:

1024 x 768, 256 colors with 1MB
1280 x 1024, 256 colors with 2MB
VESA Display Channel supported
DPMS compliant
Video RAM 2MB Non Upgradable