Specifications

I/O Expansion slot - CN20 - CN27
The system board contains eight expansion slots comprised of
two basic types as follows:
l Two 8-bit ISA slots for PC/XT boards
l Six 32-bit EISA slots for EISA boards, PC/AT and PC/XT boards
You should install only the ISA board on two 8-bit ISA slots.
But it is possible to install both the EISA and ISA board on six
32 bit EISA slots.
EISA (Extended Industry Standard Architecture) is a PC bus
architecture which is elaborates to embody the high-
performance 32 bit I/O function and also support the existing
16 bit bus architecture. It extends the AT bus, adding the
power to address more memory faster through a 32-bit data bus.
EISA includes a new form of bus arbitration to facilitate
multitasking and the setting up of expansion products.
EISA is compatible with 16 bit XT/AT system, that is, you can
use any software which is used with 16 bit XT/AT system.
Keyboard Port — CN3
The keyboard connector CN3, is a S-pin DIN connector for
keyboards that are compatible with the IBM AT keyboard.
Serial Port — CN7 and CN8
Connector CN7 and CNB provide the standard AT-type
RS-232C serial interfaces.
B-6 System Mother Board