Mitsubishi Electronics PCL5100 User Manual

PCL5100 MOTHERBOARD

Pentium® and Pentium®MMX processor ready

USER GUIDE

Intel and Pentium® and Pentium®MMX are registered trademarks of Intel
Corporation.

Information contained in this document is subject to change without notice
and does not represent a commitment on the part of Mitsubishi Electric.

http://www.mitsubishi-computers.com

FEATURES AND UPGRADES

This chapter describes the features of the PCL5100 motherboard
and gives step-by-step instructions for adding more system or video
memory, upgrading the processor, and replacing the configuration
battery. Details of all relevant motherboard connectors and jumper
settings are included.

This motherboard and all its components extremely sensitive to
static electricity. Observe strict antistatic precautions at all times
when handling the board, or any components that you are removing
or fitting to it.

CAUTION

Do not alter any jumpers or switch settings other than those identified
here, unless told to by your Mitsubishi Electric PC supplier or an
authorised maintainer. Otherwise, you may damage the system
processor, the motherboard, or both.

NOTE

After you have upgraded the computer, it may not at first recognise the
new configuration. Start the BIOS Setup utility, go to the Advanced
menu and change the Reset Configuration Data item to “Yes”, then
restart the computer.

PCL5100 USER GUIDE 1

PCL5100 features and upgrades

Motherboard features

PL19

Video

1

2

3

4

5
6

PL 202

Parallel Com 1

PL 18

7

USB

(optional)

In

Out

Key/Bd

Mouse

8

9

10

1 Video memory sockets 11 Secondary E-IDE connector
2 Motherboard power connector 12 Primary E-IDE connector
3 VESA/AMC feature connector 13 CMOS battery
4 PSU logic connector 14 “Wake on LAN” connector
5 DIMM sockets 15 1.44 Mb diskette drive connector
6 Processor fan-sink connector 16 Second serial port connector
7 Processor ZIF socket 17 Modem audio connector
8 Riser board connector 18 CD audio connector
9 Internal speaker connector

10 Front panel connector

Pins 1-2 Power button
Pins 3-4 HD indicator light
Pins 5-6 Unused
Pins 7-8 Power Mode light

18

17

16

15

14
PL11
PL4
PL3

13

12

11

PL201

2 PCL5100 USER GUIDE

PCL5100 features and upgrades

PL19

PL 18

Motherboard jumper settings

There are only a few jumpers on the motherboard that you may
need to alter. All others are set at the factory and should not be
changed.

On the motherboard, pin 1 of each jumper block is indicated by a
small triangular marking.

Processor voltage and bus speed (PL19, PL18)

CAUTION

Do not change these jumpers unless you have upgraded the processor. If
they are set incorrectly the processor and other vital motherboard
components could be destroyed.

The BF0 and BF1 jumpers on jumper block PL19 may be fitted in
the High (“1”) or Low (“0”) position; the FS, PW2, PW1 and
PW0 jumpers may simply be either fitted across both pins (“In”) or
not (“Out”). See the table on the next page for the correct
configurations.

For Pentium processors only, two jumpers must also be fitted on
PL18. These jumpers must not be fitted for Pentium/MMX
processors.

PCL5100 USER GUIDE 3

PCL5100 features and upgrades

Processor Speed Jumper block PL19

BF1 BF0 FS PW2 PW1 PW0

Pentium 90 MHz High High In In In In
Pentium 100 MHz High High Out In In In
Pentium 120 MHz High Low In In In In
Pentium 133 MHz High Low Out In In In
Pentium 150 MHz Low Low In In In In
Pentium 166 MHz Low Low Out In In In
Pentium 200 MHz Low High Out In In In
Pentium/MMX 166 MHz Low Low Out Out Out Out
Pentium/MMX 200 MHz Low High Out Out Out Out
Pentium/MMX 233 MHz High High Out Out Out Out

On-board video disabling (PL19)

If you install a video adapter expansion card, the computer should
automatically detect this and disable the on-board video adapter. If
for some reason this does not happen, and you experience problems
with a newly-fitted card, you can manually disable the on-board
video adapter by removing the VGA jumper from jumper block
PL19.

Audio disabling (PL19)

The on-board audio system can be disabled by removing the AUD
jumper from jumper block PL19. Disabling the audio system frees
the interrupt and DMA channel used by that system (normally
IRQ5 and DMA1).

4 PCL5100 USER GUIDE

PCL5100 features and upgrades

BIOS upgrade and recovery (PL11, PL3)

These jumpers should not normally be changed except by a service
engineer or at the direction of a service engineer.

CMOS is cleared by moving the PL11 jumper to the 2-3 position
for a few moments while the system is turned off, then returning it
to the normal 1-2 position.

Clearing CMOS PL11

CMOS battery connected (default) 1-2

CMOS battery disconnected 2-3

BIOS reprogramming PL3

Enabled (default) 1-2 (

Disabled 2-3 (

Power Mode light colour (PL201)

Normally, the Power Mode light is [red] when the system is in Off
mode. If you move the jumper on block PL201 to pins 2-3 (
the light is extinguished in Off mode.

PROG

)

DIS

)

)

OFF

PCL5100 USER GUIDE 5

PCL5100 features and upgrades

Motherboard IRQs and DMA channels

Components Interrupts (IRQs)

0 1 2 3 4 5 6 7 8 9 101112131415

System timer

Keyboard controller

PIC daisy chain

Serial port 2

Serial port 1

Audio

Diskette controller

Parallel port

Real time clock

On-board video

USB

Mouse

Co-processor

Primary E-IDE

Secondary E-IDE

BS

BS

JS

BS

BS

JS

BS

BS

BS

BS

Components DMA channels

01234567

Audio

Diskette controller

Parallel port (ECP)

DMAC daisy chain

Fixed assignment Usual assignment BIOS alternative PnP alternative

BS = Can be disabled by BIOS Setup JS = Can be disabled by moving a jumper

6 PCL5100 USER GUIDE

JS

BS

BS