Datatech Enterprises Mini 80386SX, User Manual

The following figures show

the

configuration for total

onboard system

memory.

Description

W1 -

W6

Settings

Using

one bank

or two

banks (banks

0

&

1)

with

either

DlP or SlMM DRAMs

as

onboard memory

—>

-

Using

three

or

tour banks

of DIP

(banks

0, 1)

and

SIMM

(banks

2, 3) DRAMs

as

onboard memory

SysterTnolllflmorY

Bank

0

BagslM

21:;

2

Bank a

gill;

lntgfiggvo

R°f°'°"°°

512K

256K

OK

OK

OK

1

Disable

Page

8

640K

256K

64K

0K

0K

1

Disable

Page

9

0

Enable

1

MB

256K

256K

0K

0K

1

Enable

Page

10

1

Disable

1.5MB

256K

256K

256K

OK

1

Disable

Page

11

0

Enable

2MB

256K

256K

256K

256K

1

Enable

Page

12

1

Disable

2MB

1M

0K

0K

0K

1

Disable

Page

12

3MB

256K

256K

1M

0K

1

Disable

Page

13

0

Enable

4MB

1M

1M

0K

0K

1

Enable

page

14

1

Disable

0

Enable

5MB

256K

256K

1M

1M

1

Enable

Page

15

1

Disable

RAM

access

time

is

80ns

Note:

To

function normally, your

system has

to

be

in

Normal

Mode but not Turbo mode,

if

your

system

is

operating

in

both

zero wait-state and disabled page

interleave mode.

Million

Instruction Per

second

Test

The

Million

Instruction

Per Second

(MIPS) perfor-

mance test

— for page-interleave/zero—wait is

in

2.45

and

for Turbo

mode/one—wait is

2.23.

<~e.—

.z,

.w,

'

Chip

Insertion

Remember that when

inserting chips, you must

make

sure the notched

or

dotted end

of

the

chip

is

lined up

wrth

the notched end

of

the socket.

Gently

push the

chip

into

the socket, and

be careful not to

bend the

pins.

Jumper

A

jumper

is

a kind

of

switch which

uses

a

plastic

cap

with

a

metal interior to

connect

(short) two pins.

It

a

jumper needs

to

be

left

open,

you should

save the cap

for future

use

by covering

one

pin

only

of

the

jumper.

This

has

no effect on

the

function

of

the board

while

it

keeps the cap

handy. The illustration below

shows the

side

and

top

views

of

a three-pinjumper

in

which pins

two

and three are shorted.

Side

View

Top View

.L

To

select the proper jumper setting

for

the

RAM

size

that you want, refer to

the

figures on

the

following

pages.