Intel SBC-455 User Manual
SBC-455
Half-size 486 CPU Card with
Flat Panel/CRT SVGA Interface
FCC STATEMENT
THIS DEVICE COMPLIES WITH PART 15 FCC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO
CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE
HARMFUL INTERFERENCE. (2) THIS DEVICE MUST
ACCEPT ANY INTERFERENCE RECEIVED INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
THIS EQUIPMENT HAS BEEN TESTED AND FOUND
TO COMPLY WITH THE LIMITS FOR A CLASS "A"
DIGITAL DEVICE, PURSUANT TO PART 15 OF THE
FCC RULES. THESE LIMITS ARE DESIGNED TO
PROVIDE REASONABLE PROTECTION AGAINTST
HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS
OPERATED IN A COMMERCIAL ENVIRONMENT.
THIS EQUIPMENT GENERATES, USES, AND CAN
RADIATE RADIO FREQENCY ENERGY AND , IF NOT
INSTATLLED AND USED IN ACCORDANCE WITH THE
INSTRUCTION MANUAL, MAY CAUSE HARMFUL
INTERFERENCE TO RADIO COMMUNICATIONS.
OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE
REQUIRED TO CORRECT THE INTERFERENCE AT HIS
OWN EXPENSE.
Copyright Notice
This document is copyrighted, 1995, 1996, by AAEON Technology Inc. All rights are reserved. AAEON Technology Inc. reserves
the right to make improvements to the products described in this
manual at any time without notice.
No part of this manual may be reproduced, copied, translated or
transmitted in any form or by any means without the prior written
permission of AAEON Technology Inc. Information provided in
this manual is intended to be accurate and reliable. However,
AAEON Technology Inc. assumes no responsibility for its use, nor
for any infringements upon the rights of third parties which may
result from its use.
Acknowledgements
ALI is a trademark of Acer Laboratories, Inc.
AMD is a trademark of Advanced Micro Devices, Inc.
AMI is a trademark of American Megatrends, Inc.
AutoCAD and AutoShade are trademarks of Autodesk, Inc.
CHIPS Logotype is a registered trademark; Chips 65545 is a
trademark of Chip and Technologies, Inc.
Cyrix is a trademark of Cyrix Corporation.
IBM, PC/AT, PS/2 and VGA are trademarks of International
Business Machines Corporation.
Intel and Pentium are trademarks of Intel Corporation.
Lotus, 1-2-3 an Symphony are trademarks of Lotus Development
Corp.
Microsoft Windows®, MS-DOS, Corporation Windows and
Microsoft are registered trademarks of Microsoft Corp.
SMC is a trademark of Standard Microsystems Corporation.
TurboDLD Classic is a trademark of Panacea Inc.
UMC is a trademark of United Microelectronics Corporation.
WordPerfect is a trademark of WordPerfect Corporation.
VESA® is a registered trademark of Video Electronics Standards
Association.
All other product names or trademarks are properties of their
respective owners.
Part No. 2006455023 SBC-455 B1 4th Edition
Printed in Taiwan July 1997
Packing list
Before you begin installing your card, please make sure that the
following materials have been shipped:
• 1 SBC-455 CPU card
• 1 6-pin mini-DIN dual outlet adapter for keyboard and PS/2
mouse
• 1 Hard disk drive (IDE) interface cable (40 pin)
• 1 Floppy disk drive interface cable (34 pin)
• 1 Parallel port adapter (26 pin) and COM2 adapter (9 pin) kit
• 5 Utility disks with CHIPS 65545/48 utility programs and drivers
• PC/104 Expansion connector converter (pin headers)
• PC/104 Module mounting supports
If any of these items are missing or damaged, contact your distributor or sales representative immediately.
Contents
Chapter 1: General Information ..................................................1
Introduction ........................................................................... 2
Features.................................................................................. 3
Specifications ......................................................................... 4
Board layout........................................................................... 6
Card dimensions .................................................................... 7
Chapter 2: Installation ..................................................................9
Jumpers and connectors .................................................... 1 0
Locating jumpers and connectors .................................... 11
Setting jumpers ................................................................... 1 2
Safety precautions ............................................................... 1 3
Installing the CPU ............................................................... 1 3
Removing a CPU ....................................................................13
Installing a CPU ......................................................................14
CPU type select (JP1, JP3, JP4) ............................................ 15
CPU Vcc select (JP2) ............................................................ 16
CPU clock select (JP9, JP10).................................................16
Installing DRAM (SIMMs) ............................................... 17
Installing SIMMs .....................................................................17
Removing SIMMs ...................................................................17
IDE hard drive connections (IDE) ................................... 1 8
Connecting the hard drive .......................................................1 8
IDE LED (IDE LED) ............................................................. 19
Floppy drive connections (FLOPPY DISK) .................... 2 0
Connecting the floppy drive.....................................................20
Parallel port (PRINTER) ................................................... 2 1
Installing the retaining bracket.................................................21
Parallel port DRQ and DACK (JP11) ....................................22
Power supply connections (POWER CON) .................... 2 2
Power supply connector..........................................................22
Display connections (VGA, LCD) ..................................... 2 3
LCD signal select (JP5, JP7) ............................................ 2 4
Keyboard and PS/2 KB/ mouse connections
(KB CON, KB/PS2 MOUSE) ........................................... 2 5
Serial ports ........................................................................... 2 6
RS-232 connections (COM A, COM B) ................................26
Serial ports IRQ select (JP11) .................................................27
Watchdog timer setup......................................................... 2 8
Watchdog timer time-out signal select (JP6)...........................28
W atchdog timer programming .................................................28
External switches and LEDs ............................................. 3 0
Power LED and keylock (KEY LOCK) ................................30
External speaker (EXT SPK) ................................................. 30
Reset switch (RESET SW).....................................................31
Turbo LED (TURBO LED)....................................................31
SMI (System Management Interrupt) switch (SMI SW) .......32
Turbo Switch (TURBO SW) ..................................................32
Clear CMOS (JP12) ................................................................32
Flash BIOS Protect (JP8) .......................................................33
Flash BIOS Write-enable Voltage (JP13) ...............................33
Chapter 3: AMI WinBIOS Setup .................................................35
General information ............................................................ 36
Starting WinBIOS setup ..........................................................3 6
WinBIOS main menu ..............................................................3 6
Using a mouse with WinBIOS setup.......................................37
Using the keyboard with WinBIOS setup ...............................37
Setup ..................................................................................... 38
Standard Setup ........................................................................38
Advanced Setup ......................................................................40
Chipset Setup ..........................................................................46
Power Management Setup......................................................48
PCI/PnP Setup ........................................................................ 49
Peripheral Setup ......................................................................53
Utility..................................................................................... 56
Security ................................................................................. 57
Setting a Password..................................................................58
Anti-virus................................................................................. 59
Default................................................................................... 60
Original ....................................................................................60
Optimal .................................................................................... 60
Fail-Safe ..................................................................................60
Exiting WinBIOS ................................................................ 6 1
Chpater 4: Flat Panel/CRT Controller Display Drivers and
Utilities ...............................................................63
Software drivers .................................................................. 6 4
Hardware configuration ..........................................................6 4
Necessary prerequisites .......................................................... 65
Before you begin .....................................................................65
WindowsÔ 95 ......................................................................... 66
WindowsÔ 3.1 . .. .. .. .. .. .. .. .... .. .. .. .. .. .... .. .. .. .. .. .. .... .. .. .. .. .. .... .. .. .. .. . 67
DOS ........................................................................................68
OS/2 ........................................................................................69
WindowsÔ NT3.51 ................................................................ 72
Windows NT4.0 ......................................................................73
Software utilities .................................................................. 7 4
The CHIPSDSP utility program..............................................74
The CHIPSCPL utility program..............................................76
Appendix A: Watchdog T imer Demo Program....... 79
Appendix B: Installing PC/104 Modules ................. 83
Appendix C: LCD Display BIOS Configuration..... 87
General
Information
This chapter provides background
information for the SBC-455.
Sections include:
• Card specifications
• Board layout
1
CHAPTER
Chapter 1 General Information 1
Introduction
The SBC-455 is an all-in-one single board 486 computer with an onboard flat panel/CRT SVGA controller. It packs all the functions of
an industrial computer and its display capabilities onto a single, halfsize card. This means the SBC-455 is your absolute best solution for
embedded applications.
The on-board PCI-bus, flat panel/CRT SVGA controller uses the
CHIPS 65548 chipset with up to 1 MB of video memory. This chipset,
used with the local PCI-bus, enables 32-bit graphic throughput at up
to 33 MHz. Excellent for display-intensive applications, it supports
various LCD types including TFT, STN, B/W, and EL.
Another feature of the SBC-455 is the inclusion of a high speed, local
bus IDE controller. This controller supports (through ATA PIO) mode
3 and mode 4 hard disks, enabling data transfer rates in excess of 11
MB/second. Up to four IDE devices can be connected, including large
hard disks, CD-ROM drives, tape backup drives, or other IDE
devices. The built-in, enhanced IDE controller provides a 4-layer, 32bit, posted write buffer and a 4-layer, 32-bit read-prefetch buffer to
accomplish IDE boost performance improvements.
On-board features include two high speed RS-232 serial ports with
16C550 UARTs, one bidirectional SPP/EPP/ECP parallel port and a
floppy drive controller. In addition to the 486's 16 KB of on-chip
cache memory, the SBC-455 includes an extra 128 KB of second level
on-board cache memory.
If program execution is halted by a program bug or EMI, the board's
16-stage watchdog timer can automatically reset the CPU or generate
an interrupt. This ensures reliability in unmanned or standalone
systems.
The SBC-455 supports 5 V EDO DRAM. It also provides two 72-pin
SIMM (Single In-line Memory Module) sockets for its on-board
system DRAM. These sockets give you the flexibility to configure
your system from 1 MB to 64 MB of DRAM using the most economical combination of SIMMs.
2 SBC-455 User's Manual
Features
• Accepts Intel, AMD, Cyrix or other compatible 486 processors, including
the P24T Pentium OverDrive
• Half-size PC/AT-compatible ISA-bus CPU card
• AMI Flash BIOS
• Daughterboard available for various flat panel displays
• On-board 32-bit PCI-bus, flat panel/CRT SVGA controller
• Built-in PCI Enhanced IDE controller, supports two IDE devices (large
hard disks, CD-ROM, tape backup, etc.)
• Up to 64 MB on-board DRAM
• Supports 5 V EDO DRAM
• Two high speed serial RS-232 ports (16C550 UARTs with 16-byte FIFO).
IRQ 3, 4 or IRQ 10, 11 can be individually selected
• One enhanced bidirectional parallel port. Supports SPP/EPP/ECP
• Watchdog timer (15 steps, 2 seconds per step)
• On-board keyboard and PS/2 mouse connector
• Connectors for PC/104 module expansion
• "Green" function supports power management
• Clear CMOS function
Chapter 1 General Information 3
Specifications
CPU: 80486SX/DX/DX2/DX4 25/33/40/50/66/75/100/120 MHz, 5x86-100/120/
133 or Pentium OverDrive processor
Bus interface: ISA bus
Data bus: 32-bit
Processing ability: 32-bit
Chipset: ALI/1489/1487
RAM memory: 1 MB to 64 MB. Uses two 72-pin SIMM sockets
L2 Cache memory size: 128/256/512 KB 2nd level cache memory
Shadow RAM memory: Supports system and video BIOS shadow memory
Flat panel/CRT SVGA controller: SVGA, PCI-bus, CHIPS 65548 chipset with
512 KB standard video memory , upgradable to 1 MB. Provides 32-bit graphic
throughput. Features the ability to control most TFT , STN, B/W, EL flat panel
displays as well as standard CR T . Supports resolutions up to 1024 x 768 in 256
colors. Daughterboards available for various flat panel displays.
Enhanced IDE hard disk drive interface: Fast PCI bus. Supports up to two
Enhanced IDE (ATA-2) large hard disk drives or other Enhanced IDE
devices. Supports mode 3 and mode 4 hard disks (data transfer rate 11.1 MB/
sec. minimum)
Floppy disk drive interface: Supports up to two floppy disk drives, 5 1/
4"¼" (360 KB and 1.2 MB) and/or 3 1/2" (720 KB, 1.44 and 2.88 MB)
Bidirectional parallel port: Configurable to LPT1, LPT2, LPT3 or disabled
Supports SPP/EPP/ECP standards
Serial ports: Two serial RS-232 ports, uses 16C550 UARTs with 16-byte
FIFO buffer. Supports speeds up to 115 Kbps. Ports can be individually
configured from COM1 to COM4 or disabled.
BIOS: AMI Flash WIN BIOS
Watchdog timer: Can generate a system reset or IRQ15. The time interval is
software selectable from 2 to 32 seconds (15 steps, 2 seconds per step).
PC/104: 104-pin connector for a 16-bit bus
DMA channels: 7
4 SBC-455 User's Manual
Interrupt levels: 15
Keyboard/ PS/2 mouse connector: A 6-pin mini DIN keyboard connector is
located on the mounting bracket for easy access to a keyboard and a PS/2
mouse
Bus speed: 8 MHz
System performance: 325 MHz in 80486 DX4-100 (Landmark V2.0)
Max. power requirements: +5 V @ 2.5 A
Power supply voltage: +5 V (4.75 V to 5.25 V), +12 V, -12 V; for DX4-
100/120 and P24T CPUs, a cooler is necessary
Operating temperature: 32 to 140°F (0 to 60°C)
Board size: 7.3" (L) x 4.8" (W) (185 mm x 122 mm)
Board weight: 0.6 lbs (0.26 Kg)
Chapter 1 General Information 5
Board layout
M48T86PCI
ST
MEGA-KB
SMC
FDC37C665
24MHz
16V8
AMI BIOS
TC5142560BJ-70
ALI
M1487
FS65545 B2
CHIPS
14.318
SC464
IMI
M1489
ALI
SBC-455 486SX/DX/DX2/DX4 CPU CARD WITH CACHE REV. B1
6 SBC-455 User's Manual
Card dimensions
73.66 26.00
185.00
178.00
19.00
98.50
80.65
19.50
SBC-455 486SX/DX/DX2/DX4 CPU CARD WITH CACHE REV. B1
122.00
Chapter 1 General Information 7
8 SBC-455 User's Manual
CHAPTER
2
Installation
This chapter explains set up procedures
for the SBC-455 hardware, including
instructions on setting jumpers and
connecting peripherals, switches and
indicators. Be sure to read all safety
precautions before you begin the installation procedure.
Chapter 2 Installation 9
Jumpers and connectors
Connectors on the board link it to external devices such as hard
disk drives, a keyboard, or floppy drives. In addition, the board has
a number of jumpers that allow you to configure your system to
suit your application.
The table below lists the function of each of the board jumpers and
connectors:
Jumpers and connectors
Label Function
JP2 CPU voltage select
JP1,3,4 CPU type select
JP11 COM port IRQ and Parallel port DRQ/DACK
select
JP5 LCD clock signal select
JP7 LCD enabled signal select
JP6 Watchdog out select
JP9, 10 CPU clock select
JP12 Clear CMOS
JP8 Flash BIOS Protect
JP13 Flash BIOS Write-enable Voltage
Primary IDE Enhanced IDE connector
Floppy disk FDD connector
Printer Parallel port connector
LCD LCD panel connector
COM B Serial port 2
RESET SW Reset Switch
EXT SPK Ext. speaker
KEY LOCK Power LED and KB lock
TURBO SW Turbo Switch
SMI SW SMI Switch
POWER CON Power connector
IDE LED IDE LED
TURBO LED Turbo LED
COM A Serial port 1
VGA VGA connector
KB CON External keyboard connector
KB/PS2 MOUSE Keyboard or PS/2 mouse connector
J1,2 PC/104 module connector
SIMM1,2 DRAM module socket
10 SBC-455 User's Manual
Locating jumpers and connectors
SMI SW
TURBO SW
JP12
KEY LOCK
EXT SPK
JP11
PRINTER
COM2
LCD
JP8
JP7
JP13
JP6
FLOPPY DISK
JP5
CPU TYPE
CPU Vcc
POWER CON
SMC
FDC37C665
24MHz
16V8
COM1
AMI BIOS
TC5142560BJ-70
VGA
M48T86PCI
ST
MEGA-KB
ALI
M1487
FS65545 B2
CHIPS
SC464
IMI
KB/PS2
MOUSE
14.318
KB CON
PC/104
MODULE
CONNECTOR
JP 9, 10
Primary IDE
IDE LED
TURBO LED
RESET SW
SIMM SOCKETS
M1489
ALI
SBC-455 486SX/DX/DX2/DX4 CPU CARD WITH CACHE REV. B1
Chapter 2 Installation 11
Setting jumpers
You configure your card to match the needs of your application by
setting jumpers. A jumper is the simplest kind of electric switch. It
consists of two metal pins and a small metal clip (often protected
by a plastic cover) that slides over the pins to connect them. To
close a jumper you connect the pins with the clip. To "open" a
jumper you remove the clip. Sometimes a jumper will have three
pins, labeled 1, 2 and 3. In this case you would connect either pins
1 and 2 or 2 and 3.
1
Open Closed Closed 2-3
The jumper settings are schematically depicted in this manual as
follows:
1 2 3
Open Closed Closed 2-3
A pair of needle-nose pliers may be helpful when working with
jumpers.
3
2
If you have any doubts about the best hardware configuration for
your application, contact your local distributor or sales representative before you make any changes.
Generally, you simply need a standard cable to make most
connections.
12 SBC-455 User's Manual
Safety precautions
Warning! Always completely disconnect the power cord from
your chassis whenever you are working on it. Do
not make connections while the power is on
because sensitive electronic components can be
damaged by the sudden rush of power. Only
experienced electronics personnel should open
the PC chassis.
Caution! Always ground yourself to remove any static
charge before touching the CPU card. Modern
electronic devices are very sensitive to static
electric charges. Use a grounding wrist strap at
all times. Place all electronic components on a
static-dissipative surface or in a static-shielded
bag when they are not in the chassis.
Installing the CPU
The SBC-455 CPU card supports most 486 CPUs. The system's
performance depends on the CPU you choose. You can install or
upgrade the CPU in the board's PGA socket by following the
procedures outlined below. If your system has an existing CPU,
you need to remove it before installing the new CPU.
Removing a CPU
1. Disconnect power from the chassis, and unplug all connections
to the CPU card. Then, remove the CPU card from the chassis
by following the instructions in the user's manual for your
chassis.
2. Lift the CPU out of the PGA socket. The old chip may be
difficult to remove. You may find spray chip lubricant,
designed for pin-grid-array (PGA) devices, and a chip puller
helpful. These are available at electronics hobbyists' supply
stores.
Chapter 2 Installation 13
Installing a CPU
T o install the CPU, follow the instructions that came with it. If no
documentation was provided, the general procedures for installing
a CPU are outlined below:
1. Lubricate the pins on the CPU with lubricant for PGA devices.
This makes the CPU slide in much easier and greatly reduces
the chance of damaging the pins and other components.
2. Carefully align the CPU so that it is parallel to the socket.
Make sure that the notch on the corner of the CPU matches the
notch on the inside of the socket.
3. Gently push the CPU into the socket. There will probably be a
small gap between the CPU and the socket even when it is
fully seated. DO NOT USE EXCESSIVE FORCE!
When you install a new CPU, you may have to adjust other
settings on the board, such as CPU type, CPU clock, and PCI
speed, to accommodate it. Make sure that the settings are correct
for your CPU. Improper settings may damage the CPU.
14 SBC-455 User's Manual
CPU type select (JP1, JP3, JP4)
JP1, JP3, and JP4 must be set to match the CPU type. The chart
below shows the proper jumper setting for their respective CPU.
CPU Type select (JP4, JP3, JP1)
Intel P24T AMD/Intel DX4 Series AMD-X5-133/ Intel 486SX
Intel P24D AMD DX2-66(WB)
Intel DX2-66 (default)
AMD DE2-66
JP 4 3 1 JP 4 3 1
Pin 1
2
3
4
5
6
7
8
9
Pin 1
2
3
4
5
6
7
8
9
Cyrix/IBM/ST Cyrix/IBM/ST/TI AMD
5x86 , DX4 DX2 Series DX2-66(WT)
Series
JP 4 3 1 JP 4 3 1
Pin 1
2
3
4
5
6
7
8
9
Pin 1
2
3
4
5
6
7
8
9
JP 4 3 1
Pin 1
2
3
4
5
6
7
8
9
JP 4 3 1
Pin 1
2
3
4
5
6
7
8
9
JP 4 3 1
Pin 1
2
3
4
5
6
7
8
9
Chapter 2 Installation 15
CPU Vcc select (JP2)
JP2 must be set to match the CPU type. The chart below shows the
proper jumper settings for their respective Vcc.
CPU Vcc select (JP2)
5.0 V 3.3 V 3.45 V (default)
4.0 V 3.6 V
CPU clock select (JP9, JP10)
JP9 and JP10 are used to synchronize the CPU clock with the CPU
type. Set the CPU clock according to the base CPU speed.
CPU clock select (JP9, JP10)
25 MHz 33 MHz (default) 40 MHz 50MHz
16 SBC-455 User's Manual
Installing DRAM (SIMMs)
The SBC-455 CPU card provides two 72-pin SIMM (Single In-line
Memory Module) sockets and supports between 1 MB and 64 MB
DRAM.
When installing SIMMs, make sure that Bank 1 is filled first.
Installing SIMMs
Note that the modules can only fit into a socket one way.
1 . Insert the memory module into the socket at a moderate angle.
2. Push the module toward the vertical posts at both ends of the
socket until the module is upright and the retaining clips at
both ends of the module click into place. When positioned
correctly, the pins on top of the vertical posts should correspond to the circular holes on the ends of the module.
3. Repeat steps 1 and 2 for each module you install.
Removing SIMMs
If you need to remove a SIMM, follow the procedures below:
1 . Supporting the SIMM with a finger, use a pen or a similarly
shaped object and press one retaining clip straight down.
2. Repeat for the other side. When released, the retaining clips
will push the SIMM up and out of its upright position.
3. Carefully pull the SIMM out of the socket with your fingers.
4. Repeat the above steps for each module you remove.
Chapter 2 Installation 17
IDE hard drive connections (IDE)
You can attach two Enhanced Integrated Device Electronics hard
disk drives to the SBC-455's internal controller. The card comes
with a 40-pin flat piggyback cable. This cable has three identical
40-pin flat-cable connectors.
Connecting the hard drive
Wire number 1 on the cable is red or blue, and the other wires are
gray.
1. Connect one end of the cable to the IDE connector. Make sure
that the red (or blue) wire corresponds to pin 1 on the connector, which is labeled on the board (on the right side).
2. Plug the other end of the cable to the Enhanced IDE hard drive,
with pin 1 on the cable corresponding to pin 1 on the hard
drive. (See your hard drive's documentation for the location of
the connector.)
Unlike floppy drives, you can make the connections with any of
the connectors on the cable. If you install two drives, you will
need to set one as the master and one as the slave. You do this
using jumpers on the drives. If you install just one drive, set it as
the master.
18 SBC-455 User's Manual
Pin assignments
The following table lists the pin numbers and their respective
signals:
IDE Connector (PRIMARY IDE)
Pin Signal Pin Signal
1 Reset 2 GN D
3D7 4D8
5D6 6D9
7 D5 8 D10
9 D4 10 D11
11 D3 12 D12
13 D2 14 D13
15 D1 16 D14
17 D0 18 D15
19 GND 20 N.C.
21 N.C, 22 GND
23 IOW 24 GND
25 IOR 26 GND
27 IORDY 28 BALE
29 N.C. 30 GND
31 IRQ 14 32 -I/O CS16
33 A1 34 N.C.
35 A0 36 A2
37 CS0 38 CS1
39 -ACT 40 GND
IDE LED (IDE LED)
You can connect an LED to indicate that an IDE device is in use.
The pin assignments for this jumper are as follows:
IDE LED pin assignments (IDE LED)
Pin Function
1 -R/W IDE
2 Pull high
Chapter 2 Installation 19
Floppy drive connections (FLOPPY DISK)
You can attach up to two floppy disks to the SBC-455's on-board
controller. You can use any combination of 5 1/4" (360 KB and
1.2 MB) and/or 3 1/2" (720 KB, 1.44 MB, and 2.88 MB) drives.
The SBC-455 CPU card comes with a 34-pin daisy-chain drive
connector cable. On one end of the cable is a 34-pin flat-cable
connector. There are two sets of floppy disk drive connectors, one
in the middle, and one on the other end. Each set consists of a 34pin flat-cable connector (usually used for 3.5" drives) and a
printed-circuit board connector (usually used for 5.25" drives).
Connecting the floppy drive
1 . Plug the 34-pin flat-cable connector into the FLOPPY DISK
connector.
2. Attach the appropriate connector on the other end of the cable
to the floppy drive(s). You can use only one connector in the
set. The set on the end (after the twist in the cable) connects to
the A: floppy. The set in the middle connects to the B: floppy.
Pin assignments
The following table lists the pin assignments for the FLOPPY
DISK connector:
FLOPPY DISK Connector
Pin Signal Pin Signal
1~33 (odd) GND 2 High density
4, 6 Unused 8 Index
10 Motor enable A 12 Driver select B
14 Driver select A 16 Motor enable B
18 Direction 20 Step pulse
22 Write data 24 Write enable
26 Track 0 2 8 Write protect
30 Read data 32 Select head
34 Disk change
20 SBC-455 User's Manual
Parallel port (PRINTER)
Normally, the parallel port is used to connect the card to a printer.
The SBC-455 includes an on-board parallel port, accessed through
the PRINTER connector, a 26-pin flat-cable connector. The CPU
card comes with an adapter cable, which lets you use a traditional
DB-25 connector. The cable has a 26-pin connector on one end
and a DB-25 connector on the other, mounted on a retaining
bracket.
Installing the retaining bracket
The retaining bracket installs at an empty slot in your system's
chassis. It provides an external port that allows your parallel
peripheral to access to the card's parallel port connector.
1. Find an empty slot in your chassis.
2. Unscrew the plate that covers the end of the slot.
3. Screw in the bracket in place of the plate.
4. Next, attach the flat-cable connector to the PRINTER connector. Wire 1 of the cable is red or blue, and the other wires are
gray. Make sure that Wire 1 connects to Pin 1 of the PRINTER
connector. Pin 1 is on the right side of the PRINTER connector.
Pin assignments
PRINTER Connector
Pin Signal Pin Signal
1 Strobe 2 Data 0
3 Data 1 4 Data 2
5 Data 3 6 Data 4
7 Data 5 8 Data 6
9 Data 7 10 -Acknowledge
11 Busy 12 Paper empty
13 + Select 14 - Auto feed
15 - Error 16 - Init printer
17 - Select input 18~25 GND
Chapter 2 Installation 21
Parallel port DRQ and DACK (JP11)
Y ou can select the parallel port DRQ and DACK by setting JP1 1.
The following charts show the available options.
Parallel port DRQ and DACK selection (JP11)
DRQ1(default) DRQ3
DACK 1 (default) DACK3
Power supply connections (POWER CON)
Power supply connector
In single board computer (non-passive backplane) applications,
you will need to connect power directly to the SBC-455 board
using POWER CON. This connector is fully compatible with the
standard PC power supply connector. See the following table for
its pin assignments:
Power connector (POWER CON)
Pin Function
1 N.C.
2 +5 V
3 +12 V
4 -12 V
5 GND
6 GND
22 SBC-455 User's Manual
DC
DC
DC
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