American Megatrends 386DX-AD5 User manual

M A N U A L
U S E R ' S

Contents
Unit 1... Overview
Unit 2... Main Board Layout and Description
Unit 3 ... BIOS Setup

T ADEMA KS ANNOUNCEMENT
* IBM PC/AT , AM I, INTEL, AM D, CY IX
U M C , M S-DO S, OS/2, UNIX, X E N IX , A E
TH E EGISTE ED T A D EM A K S O F
TH E I ESPECTIVE O GANIZATIO NS

Overview

verview
Talking about 386 M/B, everybody thinks of SP D. Yes,
the feature of this new enhanced main board, 386-AD 111 is
in its fast speed when compare with the other 386 M/B.
7be concept of cache memory is that some active portion
of a low speed memory is stored in duplicate, and in a
higher-speed cache memory. When memory request is
generated, the request is first presented to the cache
memory. If cache cannot respond, the request is presented
to main memory.
7Ъе CACH main board is designed to perform as a very
efficient memory system, while the memory devices is
very low-cost. The detailed specification of this 386-
AD III M/B as follows :
Specification :
* Using A LI Chipset, consists of M 1429, M 1431.
* Using IN T L /A M D 80386DX-33/40 or CYRIX
CX486DLC-40 CPU, Landmark Speed (V. 2.0) is
5 1.4/ 61.6 or 128.5 respectively.
* 100% IBM PC/AT compatible.

verview ................................................................
* 80387 co-processor Socket Support.
* Write-Back & Write-Through direct mapping Cache
with Cache sizes 32KB/128KB.
* Page Mode DRAM controller supports up to 32MB
DRAM with combination of 256K B/1 MB/4MB SIMM
Modules.
* Hardware/Software TURBO speed control.
* AMI BIOS (Single BIOS, 512K-BU ROM).
* Five 16-Bit expansion slots.
* Optionized for OS/2, WINDOWS/386, UNIX, X NIX,
NOV LL 386.... Software nvii*onment.
* 1/2 Baby Half Size ; 4-Layer.

Main Board Layout
and Description

#
0 ain Board Layout & Description
386-AD V Main Board Layout :
ю
□c : — 3
AD-5

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ШШ
JP 13 for C P Clock Jumper Select
CPU Clock 1-2 3-4 5-6
33MHz ON ON OFF
40MHz OFF OFF ON
JPl, JP5 CP Type Select
1-2 : Intel & AM D 386DX
2-3 : Cyrix 486DLC
CA C H E R A M :
Total CACH RAM for 386-AD III M/B is 32KB, 128KB
Cache memory size. While using 32KB, 128KB please insert
the SRAM in sockets:
U1-U4, U18

1. 32KB Cache RAM is inserted: 8K8*5 pcs
2. 128KB Cache RAM is inserted: 32K8*4 pcs
and TAG RAM is inserted: 8K8*1 pcs
a n
□C Z rrZ 3
c : m
JLJ
AD-5

SLOTS
7Ъе expansion slots are :
16 bit slot * 5 pcs

Memory Organization
A /em ory size expansion from 1 MB to 32MB
Board. Let’s discuss it one by one :
On Board R A M :
SIMM SOCKET
П -------------- L! ------------- = J ,
F 1 -------- 1 ------------------------- 1
h 1 --------------- 1 ------------------------- 1
fi . .... - o
г Г
Ml
------------ -----------
III ‘
1
1 1 ------------------------- 1
-j 1 _ 1
и 1
[ □
1
п\
rrz’rr \ r—
□ =
— 1
7 7 ,1
----- 1
X
T
1— L
AD-5
On

Supporting 256KB, 1MB and 4MB SIMM RAM
MODUL . So, memory are available with mixture of
1MB / 2MB / 4M В / 5MB / 8MB / 16MB /20МВ /
32MB devices.
Memory Size BANKO BANK 1
1 MB 256KB —
4 MB 512KB 2 MB
4 MB 1 MB - - -
5 MB 256KB 4 MB
8 MB 1 MB 4M B
16 MB 4 MB - - -
20 MB 1 MB 16 MB
32 MB 4 MB 16 MB

nit 3
BIO etup