SBC-400 Half-size 486 All-in-One CPU Card with Cache 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 OPER- ATION. 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 RESIDEN- TIAL AREA IS LIKELY TO CAUSE HARMFUL INTER- FERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO CORRECT THE INTERFERENCE AT HIS OWN EXPENSE. 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. 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. ® Microsoft Windows is a registered trademark of Microsoft Corp. SMC is a trademark of Standard Microsystems Corporation. UMC is a trademark of United Microelectronics Corporation. All other product names or trademarks are properties of their respective owners. Part No. 2006400020 2nd Edition Printed in Taiwan March 1996 Packing list Before you begin installing your card, please make sure that the following materials have been shipped: • 1 SBC-400 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) • 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 ...................................................... 10 Locating jumpers and connectors .......................................11 Setting jumpers .................................................................... 12 Safety precautions ................................................................ 13 Installing the CPU ................................................................ 13 Removing a CPU ................................................................... 13 Installing a CPU ..................................................................... 14 CPU type select (JP2, JP3, JP4)............................................. 15 CPU Vcc select (JP5, JP6) ..................................................... 16 CPU clock select (JP7, JP8)................................................... 16 Installing DRAM (SIMMs) ................................................. 17 Installing SIMMs ................................................................... 17 Removing SIMMs .................................................................. 17 Selecting cache memory size ............................................... 18 Cache memory select (JP1) .................................................... 18 IDE hard drive connections (CN1) ..................................... 19 Connecting the hard drive ...................................................... 19 Floppy drive connections (CN2) ......................................... 21 Connecting the floppy drive................................................... 21 Parallel port (CN3) .............................................................. 22 Installing the retaining bracket .............................................. 22 Parallel port DRQ (JP10) and DACK (JP11) ........................ 23 Power supply connections ................................................... 24 Power supply connector (CN4).............................................. 24 Keyboard and PS/2 mouse connectors (CN7, J1) ............. 25 Serial ports............................................................................ 26 RS-232/422/485 select for COMB (JP23, JP39) ................... 26 RS-232/422/485 serial port connections (COMA, COMB) .. 27 Serial ports IRQ select (JP9).................................................. 29 Watchdog timer setup.......................................................... 30 Watchdog timer time-out signal select (JP38) ....................... 30 Watchdog timer programming ............................................... 30 External switches and LEDs ............................................... 32 Power LED and keylock (JP12) ............................................. 32 External speaker (JP13) ......................................................... 32 Reset switch (JP14)................................................................ 33 Turbo LED (JP15).................................................................. 33 Turbo switch (JP17) ............................................................... 33 Chapter 3 AMI WinBIOS Setup ................................. 35 General information ............................................................ 36 Starting WinBIOS setup......................................................... 36 WinBIOS main menu ............................................................. 36 Using a mouse with WinBIOS setup ..................................... 37 Using the keyboard with WinBIOS setup .............................. 37 Setup ...................................................................................... 38 Standard Setup ....................................................................... 38 Advanced Setup ..................................................................... 39 Chipset Setup ......................................................................... 43 Power Management Setup ..................................................... 45 Peripheral Setup ..................................................................... 46 Utility..................................................................................... 48 Security ................................................................................. 49 WinBIOS password support................................................... 49 Anti-virus ............................................................................... 51 Chapter 3 (Cont’d) Default ................................................................................... 52 Original .................................................................................. 52 Optimal .................................................................................. 52 Fail-Safe ................................................................................. 52 Exiting WinBIOS ................................................................. 53 Appendix A Watchdog Timer Demo Program ........ 55 Appendix B Installing PC/104 Modules ................... 59 1 General Information This chapter gives background informa- tion on the SBC-400. Sections include: • Card specifications • Board layout Chapter 1 General Information 1 CHAPTER Introduction The SBC-400 is an all-in-one CPU card that supports L2 cache sizes from 128 KB to 512 KB (32 KB x 8, 64 KB x 8, or 128 KB x 8). This CPU card uses the M1489/M1487 chipsets, which accept Intel, AMD, Cyrix, or other compatible 486-based CPUs. The SBC-400 is fully PC/ AT compatible, so your software will run without modifications. On-board features include two high-speed serial ports (RS-232 and RS-232/422/485) with 16C550 UARTs, one bi-directional parallel port, and a floppy drive controller. 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 stand-alone systems. The SBC-400 is built with a high speed local bus IDE controller. This controller supports (through ATA PIO) mode 3 and mode 4 hard disks, which enable data transfer rates of over 11 MB/second. It connects up to two IDE devices, including large hard disks, CD-ROM drives, tape backup drives, etc. The built-in enhanced IDE controller provides a 4- layer 32-bit posted write-buffer and a 4-layer 32-bit read-prefetch- buffer to boost IDE performance. The SBC-400 supports 5V EDO DRAM. It also provides two 72-pin SIMM (Single In-line Memory Module) sockets for on-board DRAM. This gives you the flexibility to configure your system memory from 1 ~ 128 MB using the most economical combination of SIMMs. The SBC-400 also features power management to minimize power consumption. It uses CMOS components and complies with the "Green Function" standard. If you need any additional functions, you can add industry-standard PC/104 expansion modules. We provide numerous PC/104 modules to meet your system requirements. 2 SBC-400 User's Manual Features • Accepts any Intel, AMD, Cyrix, or other compatible processor • Half-size ISA bus CPU card, fully 486SX/DX/DX2/DX4 compatible • Built-in 128 KB secondary cache, up to 512 KB • Up to 128 MB of on-board DRAM; supports 5V EDO DRAM • Built-in IDE (AT bus) hard disk drive interface, floppy drive controller • One RS-232 and one RS-232/422/485 selectable serial port; uses 16C550 UARTs with 16-byte FIFO • One bi-directional parallel port o o • 32 to 140 F (0 to 60 C) operating temperature • Watchdog timer, software programmable from 2 to 32 seconds (16 steps, 2 seconds per step) • On-board keyboard connector and/or PS/2 mouse • IDE HDD auto-detection • Connectors for PC/104 module expansion • Single +5V power supply • "Green" function, supports power management Chapter 1 General Information 3 Specifications • CPU: Intel 486SX/DX/DX2/DX4, 486SX/DX/DX2/DX4-S; AMD Am486DX/DX2/DX4, DX2+/DX4+; Cyrix Cx486DX/DX2/M7; UMC U5 • Bus interface: ISA (PC/AT) bus • Data bus: 32 bit • Processing ability: 32 bit • Chipset: ALI 1489/1487 • RAM memory: 1 MB to 128 MB, two 72-pin sockets • Shadow RAM memory: Supports system and video BIOS of up to 256 KB in 32 KB blocks • L2 Cache memory: On-board 128 KB, up to 512 KB (DIP package) • Enhanced IDE HDD interface: Supports up to two enhanced IDE (ATA-2 bus) large hard disk drives or other enhanced IDE devices. Supports mode 3 and mode 4 hard disks (minimum data transfer rate of 11.1 MB/ sec). • Floppy disk drive interface: Supports up to two floppy disk drives, 5.25" (360 KB and 1.2 MB) and/or 3.5" (720 KB, 1.44 and 2.88 MB). • Bi-directional parallel port: SPP/EPP/ECP standards. • Serial ports: One serial RS-232 port and one serial RS-232/RS-422/RS- 485 port, jumper selectable. Both with 16C550 UARTs with 16-byte FIFO buffer. • IRQ SELECTION FOR COM PORTS: COMA: Supports COM 1/2/3/4 & address is selectable; IRQ3/4/11/12 COMB: Supports COM 1/2/3/4 & address is selectable; IRQ3/4/11/12 • BIOS: AMI WinBIOS • Watchdog timer: The time interval is software selectable from 2 to 32 seconds (16 steps, 2 seconds per step). Can generate a system reset. • PC/104: 104-pin connector for a 16-bit bus • DMA channels: 7 4 SBC-400 User's Manual • Interrupt levels: 15 • Keyboard connector: A 6-pin mini DIN keyboard connector is located on the mounting bracket for easy access. An on-board keyboard 5-pin header connector is also available. • PS/2 Mouse connector: Shared with keyboard connector. • Bus speed: 8 MHz • System performance: 325 MHz in 80486DX4-100 (Landmark V2.0) • Max. power requirements: +5 V @ 2.5 A • Power supply voltage: Single +5 V (4.75 V to 5.25 V) o o • Operating temperature: 32 to 140 F (0 to 60 C); must use a cooling fan when using a DX4-100 CPU or above • Board size: 7.3" (L) x 4.8" (W) (185 mm x 122 mm) • Board weight: 1.2 lbs (0.5 Kg) • Green Function: Yes • EMI: Pending • MTBF: Pending Chapter 1 General Information 5 Board layout 6 SBC-400 User's Manual SMC ODIN FDC37C665 OEC12C887 16V8 24MHz AMI BIOS 14.318 IMI SC464 MAX213 MAX213 32K8 CACHE RAM 32K8 CACHE RAM ALI M1489 MEGA-KB 32K8 CACHE RAM 32K8 CACHE RAM 32K8 CACHE RAM SBC-400 486SX/DX/DX2/DX4 CPU CARD WITH CACHE REV:.A1 ALI M1487 Card dimensions Units=mm Chapter 1 General Information 7 185.00 178.00 73.66 26.00 PC/104 Module D4x4 98.50 122.00 19.50 80.65 19.00 8 SBC-400 User's Manual 2 Installation This chapter tells how to set up the SBC- 400 hardware, including instructions on setting jumpers and connecting peripher- als, switches and indicators. Be sure to read the all safety precautions before you begin the installation procedure. Chapter 2 Installation 9 CHAPTER 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 JP1 Cache memory select JP2,3,4 CPU type select JP5,6 CPU Vcc select JP7,8 CPU clock select JP9 Serial port IRQ select JP10 Parallel port DRQ select JP11 Parallel port DACK select JP12 Power LED and keylock JP13 External speaker JP14 Reset switch JP15 Turbo LED JP17 Turbo switch JP23,39 RS-232/422/485 select JP38 Watchdog timer time-out signal select CN1 Enhanced IDE connector CN2 FDD connector CN3 Parallel connector CN4 Power connector CN5,6 PC/104 module connectors CN7 External keyboard connector J1 Keyboard and/or PS/2 mouse connector COMA Serial port 1 COMB Serial port 2 10 SBC-400 User’s Manual Locating jumpers and connectors COMA COMB CN4 J1 JP12,13 JP23 JP39 CN3 JP38 JP10 JP9 CN5 CN6 JP7,8 CN2 JP5,6 JP4 JP3 Data JP2 RAM Cache CN1 Tag RAM CPU Cache Socket JP1 SIMM Socket Chapter 2 Installation 11 SMC ODIN FDC37C665 OEC12C887 16V8 24MHz AMI BIOS 14.318 IMI SC464 MAX211 MAX211 32K8 CACHE RAM 32K8 CACHE RAM ALI M1489 MEGA-KB 32K8 CACHE RAM 32K8 CACHE RAM 32K8 CACHE RAM SBC-400 486SX/DX/DX2/DX4 CPU CARD WITH CACHE REV:.A1 ALI M1487 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. 3 2 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. If you have any doubts about the best hardware configuration for your application, contact your local distributor or sales representa- tive before you make any changes. Generally, you simply need a standard cable to make most connec- tions. 12 SBC-400 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, 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-400 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 To install the CPU, follow the instructions that came with it. If no documentation was provided, the general procedure 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-400 User’s Manual CPU type select (JP2, JP3, JP4) JP2, 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 (JP2, JP3, JP4) Intel P24D 486DX/DX2/DX4-S 486SX-S Cyrix MISC JP 2 3 4 JP 2 3 4 JP 2 3 4 Pin 1 Pin 1 Pin 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 Cyrix/IBM/SGS Cyrix/IBM/SGS/TI486DX/DX2 486SX 5x86 486DX2 JP 2 3 4 JP 2 3 4 JP 2 3 4 JP 2 3 4 Pin 1 Pin 1 Pin 1 Pin 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 9 9 9 9 AMD-X5-133/150 AMD DX4 Enhanced AMD DX4 Standard AMD DX2 JP 2 3 4 JP 2 3 4 JP 2 3 4 JP 2 3 4 AMD-X5-160 Pin 1 Pin 1 Pin 1 Pin 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 9 9 9 9 Chapter 2 Installation 15 CPU Vcc select (JP5, JP6) JP5 and JP6 must be set to match the CPU type. The chart below shows the proper jumper settings for their respective V . cc CPU Vcc select (JP5, JP6) 1 1 1 1 1 5.0 V 3.3 V 3.45 V 3.6 V 4.0 V 1 1 1 1 1 JP5 JP6 CPU clock select (JP7, JP8) JP7 and JP8 are used to synchronize the CPU clock with the CPU type. Set the CPU clock according to the base CPU speed. CPU clock select (JP7, JP8) 25 MHz 33 MHz 40 MHz 50MHz 16 SBC-400 User’s Manual Installing DRAM (SIMMs) The SBC-400 CPU card provides two 72-pin SIMM (Single In-line Memory Module) sockets and supports between 1 MB to 128 MB of RAM. 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 corre- spond 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. Chapter 2 Installation 17 3. Carefully pull the SIMM out of the socket with your fingers. 4. Repeat the above steps for each module you remove. Selecting cache memory size The SBC-400 features a 2nd level memory cache that supports 128, 256, or 512 KB of cache memory. Higher cache memory can improve your system's performance. The cache uses SRAM chips in three sizes: 32 KB, 64 KB and 128 KB. The on-board cache memory banks consists of four SRAM chip sockets, each of which accepts one "Tag" chip. All SRAM chips must have a speed of 20 ns or faster. The table below shows the possible cache configurations: Cache Configuration Cache size Tag RAM Data RAM 128 KB one 32 K x 8 four 32 KB x 8 SRAMs 256 KB one 32 K x 8 four 64 KB x 8 SRAMs 512 KB one 32 K x 8 four 128 K x 8 SRAMs Cache memory select (JP1) When the cache size changes, you must make sure that JP1 is set to match the new cache memory size. The following chart shows the proper jumper setting for each cache configuration: 1 2 1 2 1 2 Cache memory select (JP1) 3 4 3 4 3 4 128 KB 256 KB 512 KB 18 SBC-400 User’s Manual IDE hard drive connections (CN1) You can attach two Enhanced Integrated Device Electronics hard disk drives to the SBC-400's internal controller. The card comes with a 40-pin flat-cable 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 CN1 on the CPU card. 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 Chapter 2 Installation 19 jumpers on the drives. If you install just one drive, set it as the master. Pin assignments The following table lists the pin numbers and their respective signals: Enhanced IDE connector (CN1) Pin Signal Pin Signal 1 Reset 2 GND 3D7 4 D8 5D6 6 D9 7 D5 8 D10 9D4 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 32 -I/O CS16 33 A1 34 N.C. 20 SBC-400 User’s Manual 35 A0 36 A2 37 CS0 38 CS1 39 -ACT 40 GND Floppy drive connections (CN2) You can attach up to two floppy disks to the SBC-400's on-board controller. You can use any combination of 5.25" (360 KB and 1.2 MB) and/or 3.5" (720 KB, 1.44 MB, and 2.88 MB) drives. The SBC-400 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 34-pin 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 CN2 on the CPU card. 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 CN2: Floppy disk connector (CN2) 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 Chapter 2 Installation 21 26 Track 0 28 Write protect 30 Read data 32 Select head 34 Disk change Parallel port (CN3) Normally, the parallel port is used to connect the card to a printer. The SBC-400 includes an on-board parallel port, CN3, which is accessed through 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 CN3 on the CPU card. 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 CN3. Pin assignments Parallel port connector (CN3) 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 9 10 -Acknowledge 22 SBC-400 User’s Manual 11 Busy 12 Paper empty 13 + Select 14 - Auto feed 15 - Error 16 - Init printer 17 - Select input 18~25 GND Parallel port DRQ (JP10) and DACK (JP11) You can select the parallel port DRQ and DACK by setting JP10 and JP11, respectively. The following charts show the available 1 1 options. Parallel port DRQ selection (JP10) and DACK selection (JP11) Chapter 2 Installation 23 DRQ1/DACK1 (default) DRQ3/DACK3 JP10 JP10 JP11 JP11 Power supply connections Power supply connector (CN4) In single-board-computer (non-passive-backplane) applications you will need to connect power directly to the SBC-400 board using CN4. This connector is fully compatible with the standard PC power supply connector. See the following table for its pin assignments: Power connector (CN4) Pin Function 1 N.C. 2 +5 V DC 24 SBC-400 User’s Manual 3 +12 V DC 4 -12 V DC 5 GND 6 GND Keyboard and PS/2 mouse connectors (CN7, J1) The SBC-400 board provides two keyboard connectors. A 5-pin connector (CN7) supports passive backplane applications. A second 6-pin mini-DIN connector (J1) on the card mounting bracket supports single-board-computer applications. The card comes with an adapter to convert the 6-pin mini-DIN connector, used for the mouse, to the standard DIN connector for the key- board. Keyboard connector (CN7) Pin Function 1 K.B. clock 2 K.B. data 3 N.C. 4 GND 5 +5 V DC Keyboard or PS/2 mouse connector (J1) Pin Function 1 K.B. data Chapter 2 Installation 25 2 PS/2 mouse data 3 GND 4 +5 V DC 5 K.B. clock 6 PS/2 mouse clock Serial ports The SBC-400 offers two serial ports: one RS-232 and one RS-232/ 422/485. Using the BIOS Peripheral Setup program, you can select the address for each port or disable it. The card mounting bracket has two serial port connectors. The DB- 9 connector on the top of the bracket is COMA, the RS-232 serial port. The DB-9 connector on the bottom of the bracket is COMB, the RS-232/422/485 serial port. RS-232/422/485 select for COMB (JP23, JP39) RS-232 serial ports are widely used for external input/output devices. The RS-422 and RS-485, however, are popular for industrial and laboratory applications because they offer high noise resistance and long range communication (up to 4000 ft, 1200 m). The RS-422 is communly used for two-way communication between two devices, where as RS-485 is used for communication between a single master and a network of slave modules. COMA is the RS-232 serial port, and COMB can function as an RS-232, RS-422, or RS-485, depending on the jumper settings for 1 JP23 and JP39. To select the desired serial port type for COMB, adjust JP23 and JP39 as follows: 1 RS-232/422/485 select for COMB (JP23, JP39) JP23 JP39 1 RS-232 26 SBC-400 User’s Manual RS-422 RS-485 RS-232/422/485 serial port connections (COMA, COMB) Pin assignments The following table shows the pin assignments for the card's RS- 232 and RS-422/485 (COMB) serial port connectors: RS-232 (COMA, COMB) RS-422/485 (COMB) Pin Signal Pin Signal 1 DCD 1 TX- (DTE) 2 RX 2 TX+ (DTE) 3 TX 3 RX+ (DTE) 4 DTR 4 RX- (DTE) 5 GND 5 Ground 6 DSR 6 RTS- 7 RTS 7 RTS+ 8 CTS 8 CTS- 9 RI 9 CTS- RS-422 signal wiring RS-422 is used for long-distance point-to-point connections. RS- 422 originally used four wires for one-way communication (with devices such as display terminals or printer) but was later adopted Chapter 2 Installation 27 by the industry for simultaneous two-way communication by doubling the number of wires. Each pin on the first device connects to a corresponding device on the second. Flow control lines manage the communication. The following table shows pin connections. Computer A Computer B Pin Signal Pin Signal 1 TX- > 4 RX- 2 TX+ > 3 RX+ 3 RX+ < 2 TX+ 4 RX- < 1 TX- 5 Ground < 5 Ground 6 RTS- > 9 CTS- 7 RTS+ > 8 CTS+ 8 CTS+ < 7 RTS+ 9 CTS- < 6 RTS- RS-485 signal wiring In a typical RS-485 application, the host device requests data from a slove module then listens for the response. The host transmits and receives data on the same pair of wires. Software handles the flow control; no other wires are needed. Pin assignments appear in the following table. Pins 1 and 4 share the Date+ wire. Pins 2 and 3 share the Data- wire. Computer A Device B 28 SBC-400 User’s Manual Pin Signal Pin Signal 1 TX- 1 TX- Data- ] [ 4 RX- 4 RX- 2 TX+ 2 TX+ Data+ ] [ 3 RX+ 3 RX+ 5 Ground 5 Ground Serial ports IRQ select (JP9) You can select the serial ports' IRQs by setting JP9 as follows: Serial ports IRQ selection (JP9) COMA COMB JP9 setting IRQ3 IRQ4 IRQ4 IRQ3 Chapter 2 Installation 29 IRQ11 IRQ12 IRQ12 IRQ11 Watchdog timer setup Watchdog timer time-out signal select (JP38) 1 2 3 1 2 3 If CPU processing comes to a halt because of EMI or software bug, the watchdog timer can either reset the CPU or signal an interrupt on IRQ15. Watchdog timer time-out signal select (JP38) Reset CPU IRQ15 Watchdog timer programming The watchdog timer must be programmed to write to I/O port address 443 at an interval shorter than the timer's preset interval. The timer's interval has a tolerance of ±5%, so you should program an instruction that will refresh the timer before a time-out occurs. 30 SBC-400 User’s Manual The following steps illustrate how you might program the watch- dog timer. 1. Write to I/O port 443 (Hex) and designate a time-out interval. This will enable the watchdog and set up its time-out interval. 2. Write to I/O port 043 (Hex) and any random value. This will in turn disable the watchdog timer. The watchdog timer-out interval can be set at 16 levels between 2 and 32 seconds. The following table shows the Hex values for the appropriate time-out intervals: Watchdog timer delay values Delay time Value (Hex) Delay time Value (Hex) 0~2 F 16~18 7 2~4 E 18~20 6 Chapter 2 Installation 31 4~6 D 20~22 5 6~8 C 22~24 4 8~10 B 24~26 3 10~12 A 26~28 2 12~14 9 28~30 1 14~16 8 30~32 0 External Switches and LEDs Power LED and keylock (JP12) You can connect an LED to indicate when the CPU card is on. Pin 1 of JP12 supplies power to the LED and Pin 3 is the ground. You can use a switch (or a lock) to disable the keyboard. In this state the PC will not respond to any input. This is useful if you don’t want anyone to change or stop a running program. Simply connect the switch between Pins 4 and 5. The pin assignments appear in the following table: Power LED and keylock (JP12) Pin Function 5 LED Power (+5 V) 4 No Connector 3 Ground 2 Keyboard lock 1 Ground External speaker (JP13) The CPU card has its own buzzer. You can disable the internal buzzer and connect an external speaker to JP13. Enabling the external speaker automatically disables the internal buzzer. 32 SBC-400 User’s Manual External speaker (JP13) Pin Function 5 Vcc 4 Speaker output 3 Buzzer in 2 Speaker output 1NC Reset switch (JP14) You can connect an external switch to easily reset your computer. This switch restarts your computer as if you had turned off the power then turned it back on. The following table shows the pin assignments for the JP14. Reset switch (JP14) Pin Function 1 Ground 2 Reset Turbo LED (JP15) You can connect a LED indicator across JP15 to indicate when the CPU is in Turbo mode. Marks on the circuit board indicate LED polarity (the pin on the left is positive). Turbo LED (JP15) Pin Function 1 Turbo 2 Ground Turbo switch (JP17) You can connect a switch across the pins of JP17 to change the CPU speed between Turbo and non-Turbo mode. When you leave the pins open, the CPU card operates at full speed. When you close the pins, the card operates at slow speed for compatibility with older software. Turbo switch (JP17) Pin Function Low speed High Speed 1 - Deturbo Chapter 2 Installation 33 2 Pull low 34 SBC-400 User’s Manual 3 AMI WinBIOS Setup This chapter describes the card’s diagnos- tic tests and how to set BIOS configura- tion data in a Windows environment. Chapter 3 AMI WinBIOS setup 35 CHAPTER General information WinBIOS Setup configures system information that is stored in CMOS RAM. Unlike conventional BIOS setup programs, Win- BIOS features a graphical user interface that is easy to use. Starting WinBIOS setup As POST executes, the following appears; Hit if you want to run SETUP Press to run WinBIOS setup. WinBIOS main menu The WinBIOS setup screen appears as follows: 36 SBC-400 User's Manual Using a mouse with WinBIOS setup WinBIOS Setup can be accessed via keyboard, mouse, or pen. The mouse click functions are: • single click to change or select both global and current fields • double click to perform an operation in the selected field Using the keyboard with WinBIOS setup WinBIOS Setup has a built-in keyboard driver that uses simple keystroke combinations: Keystroke Function Move to the next window or field. Ł, �, Ø, Move to the next field to the right, left, Œ above, or below. Select in the current field. + Increments a value. - Decrements a value. Closes the current operation and return to previous level. Returns to the previous page. Advances to the next page. Returns to the beginning of the text. Advances to the end of the text. +H Access a help window. +Exit WinBIOS Setup. Alphabetic keys A to Z are used in the Virtual keyboard, and are not case sensitive. Numeric keys 0 to 9 are in the Virtual keyboard and Numerickeypad. Chapter 3 AMI WinBIOS setup 37 Setup Standard Setup The WinBIOS Setup options described in this section are selected by choosing the Standard icon from the WinBIOS Setup main menu selection screen, as shown below. The Standard Setup screen appears: Date, Day and Time Configuration Select the Date and Time icon in the Standard setup. The current values for each category are displayed. Enter new values through the keyboard. Floppy A, Floppy B Select these icons to configure the type of floppy drive that is attached to the system: 360 KB 5¼", 1.2 MB 5¼", 720 KB 3½", 1.44 MB 3½", and/or 2.88 MB 3½". The settings have not been pre-installed. Master Disk, Slave Disk Select these icons to configure the hard disk type you are using for the master and the slave. The settings have not been pre-installed. Type in 1~46, User, ESDI, or SCSI. 38 SBC-400 User's Manual Advanced Setup Select the Advanced icon from the WinBIOS Setup main menu to enter Advanced setup. The Advanced Setup options described in this section are the standard options as shown on the following screen. Typematic Rate (Char/Sec) Typematic Rate sets the rate at which characters on the screen repeat when a key is pressed and held down. The settings are 15, 20, 24, 30 characters per second. System Keyboard This option specifies if error messages are displayed if a keyboard is not attached. This permits you to configure workstations with no keyboards. The settings are Absent or Present. Primary Display Select this icon to configure the type of monitor attached to the computer. The settings are Monochrome, Color 40 x 25, Color 80x25, VGA/PGA/EGA/, or Not Installed. Above 1 MB Memory Test When this option is enabled, the WinBIOS memory test is per- formed on all system memory. When disabled, the memory test is done only on the first 1 MB of system memory. Chapter 3 AMI WinBIOS setup 39 Memory Test Tick Sound This option enables (turns on) or disables (turns off) the ticking sound during the memory test. Memory Parity Error Check This option enables or disables parity error checking for system RAM. The settings are Enabled (all system RAM parity is checked) or Disabled (parity is checked only on the first 1 MB of system RAM). Hit Message Display Disabling this option prevents the message Hit if you want to run Setup from appearing when the system boots. The settings are Enabled or Disabled. Extended BIOS RAM Area Specify in this option if the top 1 KB of the system programming area beginning at 639 K or 0:300 in the system BIOS area in low memory will be used to store hard disk information. The settings are Top 1 K or 0:300. Wait for If Any Error WinBIOS POST runs system diagnostic tests that can generate a message followed by: Press to continue If this option is enabled, WinBIOS waits for the end user to press before continuing. If this option is disabled, WinBIOS continues the boot process without waiting for to be pressed. System Boot Up Num Lock When On, this option turns off Num Lock when the system is powered on so the end user can use the arrow keys on both the numeric keypad and the keyboard. 40 SBC-400 User's Manual Floppy Drive Seek at Boot When this option is enabled, WinBIOS performs a Seek command on floppy drive A: before booting the system. System Boot Up Sequence This option sets the sequence of boot drives (either floppy drive A: or hard disk drive C:) that WinBIOS attempts to boot from after POST completes. The settings are C:, A: (first C:, then A:) or A:,C: (first A:, then C:). System Boot Up CPU Speed This option sets the speed of the CPU at system boot time. The settings are High or Low. External Cache This option enables secondary cache memory. If Both is selected, internal cache and external cache memory is enabled. If Internal is chosen, only the internal cache memory in the Pentium CPU is enabled. If Disabled is chosen, all cache memory in the Pentium CPU is disabled. External Cache Mode This option selects the type of caching algorithm used by WinBIOS and the computer for L2 (external) secondary cache memory. The settings are Wr-Thr (Write-Through) or Wr-Back (Write-Back). Turbo Switch function When this option is set to Enabled, the externally mounted turbo switch is enabled. Password Checking This option enables the password check option every time the system boots or the end user runs Setup. If Always is chosen, a user password prompt appears every time the computer is turned on. If Setup is chosen, the password prompt appears if WinBIOS is executed. The Optimal and Fail-Safe default settings are Setup. Video ROM Shadow C000,32K Chapter 3 AMI WinBIOS setup 41 When this option is enabled, the video ROM area from C0000h - C7FFFh is copied (shadowed) to RAM for faster execution. The settings are Absent, NoShadow, or Shadow. Shadow C800,16K Shadow CC00,16K Shadow D000,16K Shadow D400,16K Shadow D800,16K Shadow DC00,16K These options enable shadowing of the contents of the ROM area in the option title. The settings are Absent, NoShadow, or Shadow. The ROM area that is not used by ISA adapter cards will be allocated to PCI adapter cards. Auto KeyLock Timeout This option sets the timeout value for the WinBIOS AutoKeyLock feature. If Password support is enabled, AutoKeyLock automatical- ly locks the keyboard and mouse if there has been no system activity for the length of time specified in this option. The settings are Disabled, 1 Min., 2 Min., 3 Min., 4 Min., 5 Min., 6 Min., 7 Min., 8 Min., 9 Min., 10 min., 11 Min., 12 Min., 13 Min., 14 Min., 15 Min. The Optimal and Fail-Safe defaults are Disabled. 42 SBC-400 User's Manual Chipset Setup The WinBIOS Setup options described in this section are selected by choosing the Chipset icon from the WinBIOS setup main menu, shown below. The following is a list options offered by Chipset Setup Chipset setup options Function Options Auto Configuration Function Disabled/Enabled 7.16 CPU Bus Speed/3 CPU Bus Speed/4 CPU Bus Speed/5 CPU Bus Speed/6 CPU Bus Speed/8 DRAM Read Timing Slow Normal Faster Fastest DRAM Write Timing Slow Normal Faster Fastest SRAM Read Timing 2-1-1-1 3-1-1-1 3-2-2-2 4-2-2-2 Chapter 3 AMI WinBIOS setup 43 Function Options SRAM Write Timing 0 W 1 W Parity check Disabled Enabled Hidden Refresh Disabled Enabled Cyrix CPU L1 Cache Mode WT (Write-through) WB (Write-back) ISA I/O Recovery Disabled Enabled CPU to PCI Write Buffer Disabled Enabled Byte Merge Disabled Enabled Fast Back to Back Disabled Enabled C x 5 x 86 Linear Wrapped Mode Disabled Enabled PCI IDE Trigger Type Edge Level 44 SBC-400 User's Manual Power Management Setup As part of the "Green" function, the Power Management setup offers options to help reduce power consumption. To see the the options in this group, choose the Power Mgmt icon from the WinBIOS Setup main menu. Chapter 3 AMI WinBIOS setup 45 Peripheral Setup To access Peripheral Setup, select the Peripheral icon in the WinBIOS main menu. The following screen appears: Programming Option Auto When set to Auto, WinBIOS automatically detects all adapter cards installed in the system and configures the onboard I/O (serial ports, parallel ports, floppy controllers, and IDE controller). All other Peripheral Setup option settings are ignored. Any serial port, parallel port, floppy controller or IDE (Integrated Drive Electron- ics) controller on an adapter card in an expansion slot is configured before onboard I/O. In addition, WinBIOS also attempts to avoid IRQ conflicts. If the offboard serial ports are configured to specific starting I/O ports via jumper settings, WinBIOS configures the onboard serial ports to avoid conflicts. For example, if the default serial port starting I/ O ports (serial port1 - 3F8h, serial port2 - 2F8h, serial port3 - 3E8h, serial port4 - 2E8h) are, the configurations listed in the following table are possible: 46 SBC-400 User's Manual Offboard serial port configuration # of ports port assignment onboard serial ort 2 3E8h and 2F8h 3E8h and 3E8h 2 3F8h and 3E8h 3F8h and Disabled 1 2F8h 3F8h and Disabled 1 3F8h 2F8h and Disabled Manual If Manual is selected, the settings chosen by the end user in the Peripheral Setup apply. WinBIOS will report any I/O conflicts after display the BIOS Configuration summary screen. Onboard FDC This option enables the use of the floppy drive controller on the motherboard (if installed). The settings are Enabled or Disabled. Onboard IDE This option enables the use of the IDE controller on the mother- board, if installed. The settings are enabled or Disabled. First Serial Port Address IRQ4 is used for the first serial port (COM1). This option enables serial port 1 on the motherboard, if installed. The settings are 2E8h. Second Serial Port Address IRQ3 is used for the second serial port (COM2). This option enables the serial port 2 on the motherboard, if installed. The settings are 2E8h. Parallel Port Address IRQ7 is used for the parallel port (LPT1). The IRQ can be changed to IRQ5. This option enables the parallel port on the motherboard, if installed. The settings are 278h. Parallel Port Mode This option specifies the parallel port Mode. The settings are Normal or Extended. Chapter 3 AMI WinBIOS setup 47 Utility The following icons appear in this section: Detect C: If drive C: is an IDE drive, the hard disk drive parameters for drive C: are automatically detected and reported to the Hard Disk Drive C: screen in Standard Setup, so you can easily configure drive C:. Detect D: If drive D: is an IDE drive, the hard disk drive parameters for drive D: are automatically detected and reported to the Hard Disk Drive D: screen in Standard Setup, so you can easily configure drive D:. Color Set This option sets the WinBIOS Setup screen colors. 48 SBC-400 User's Manual Security The following icons appear in this section: WinBIOS password support WinBIOS Setup has an optional password feature. The system can be configured so that all users must enter a password every time the system boots or when WinBIOS Setup is executed. The following screen appears when you select the password icon. You can enter a password by: • typing the password on the keyboard • selecting each letter via the mouse • selecting each letter via the pen stylus (pen access must be customized for each specific hardware platform.) Chapter 3 AMI WinBIOS setup 49 Setting a Password The password check option is enabled in Advanced Setup by choosing either Always or Setup. Here, you determine the password to be used. The password is stored in CMOS RAM. To assign a password, 1. Enter a 1-6 character password. The password does not appear on the screen when typed. 2. Retype the password when prompted by WinBIOS. A message box will appear when the password is confirmed. Keep a record of the password. If you forget the password, you must drain CMOS RAM and reconfigure the system. Changing a password 1. Select the Password icon from the Security section of the WinBIOS Setup main menu. 2. Enter the password and press . The screen does not display the characters entered. 3. After the new password is entered, retype the new password as prompted and press . If the password confirmation is incorrect, an error message appears. If the new password is entered without error, press to return to the WinBIOS setup Main Menu. The password is stored in CMOS RAM after WinBIOS Setup completes. The next time the system boots, you are prompted for the password if the password function is present and is enabled. 50 SBC-400 User's Manual Anti-virus Select the Anti-virus icon from the Security section of the Win- BIOS Setup main menu. WinBIOS issues a warning when any program (or virus) issues a Disk format command or attempts to write to the boot sector of the hard disk drive. The settings are Enabled or Disabled. If enabled, the following appears when a write is attempted to the boot sector. You may have to type N several times to prevent the boot sector write. Boot Sector Write !!! Possible VIRUS: Continue (Y/N)? _ The following is displayed after any attempt to format any cylinder, head, or sector of any hard disk drive via the BIOS INT 13 Hard Disk Drive Service: Format!!! Possible VIRUS: Continue (Y/N)? _ Chapter 3 AMI WinBIOS setup 51 Default The icons in this section permit you to select a group of settings for all WinBIOs Setup options. Not only can you use these icons to quickly set system configuration parameters, you can choose a group of settings that have a better chance of working when the system is having configuration-related problems. Original Choose the Original icon to return to the system configuration values present in WinBIOS Setup when you first began this WinBIOS Setup session. Optimal You can load the optimal default settings for the WinBIOS Setup options by selecting the Optimal icon. The Optimal default settings are best-case values that should optimize system performance. If CMOS RAM is corrupted, the Optimal settings are loaded auto- matically. Fail-Safe You can load the Fail-Safe WinBIOS Setup options settings by selecting the Fail-Safe icon. The Fail-Safe settings provide the most stable settings, though they do not provide optimal performance. Use this option as a diagnos- tic aid if the system is behaving erratically. 52 SBC-400 User's Manual Exiting WinBIOS You can exit WinBIOS by pressing the key while in theWinBIOS main menu screen. The following screen appears: Select the option you desire, and the system will continue its bootup sequence. Chapter 3 AMI WinBIOS setup 53 54 SBC-400 User's Manual A Watchdog Timer Demo Program The following demo program illustrates the programming steps required to enable, set, and disable the watchdog timer. Appendix A Watchdog Timer Demo Program 55 APPENDIX #include #include #include #include #include void mydelay(void); /* MAIN PROGRAM */ void main (void) { unsigned int dog=0 run_time=0; char inkey; clrscr(); gotoxy(15, 6);printf("AAEON TECHNOLOGY, INC."); gotoxy(15, 7);printf("WATCHDOG TIMER TEST & DEMO PROGRAM"); gotoxy(15, 9);printf("Please setup watchdog delay time:(2 Sec-30 Sec)"); /* Set watchdog timer time-out interval */ scanf("%2d",&dog); /* Input watchdog timer time- out interval (Sec) */ dog=dog/2; /* Convert time-out interval to designated Hex */ dog=15-dog; outportb (0x443,dog); /* Enable watchdog timer */ /* Setup screen display format */ gotoxy(15,11);printf("Now enable watchdog!"); gotoxy(15,12);printf("You can put keyboard reset or disable watchdog."); gotoxy(15,13);printf("[1]. Reset watchdog."); gotoxy(15,14);printf("[2]. Disable watchdog."); gotoxy(15,15);printf("[3]. Return to O.S."); /* Read key pressed */ while(1){ if(kbhit()){ inkey=getch(); switch(inkey){ case '1': /* Reset Watchdog timer */ gotoxy(15,11);printf("Now enable watchdog timer!"); outportb(0x443,dog); run_time=0; break; case '2': /* Disable Watchdog timer */ gotoxy(15,12);printf("Now disable watchdog timer!"); outportb (0x43,dog); return; default: break; } } 56 SBC-400 User's Manual mydelay(); run_time=run_time+1; /* Display time elapsed */ gotoxy(45,11);printf(%2d.%1d sec",run_time/ 10,run_time%10); } } /* USER FUNCTION LIBRARY */ void mydelay(void) /* Delay program: */ /* Delay 109.89ms (18.2Hz*2) */{ clock_t start,end; start=clock(); end=start; while((end-start)<2){ end=clock(); } } Appendix A Watchdog Timer Demo Program 57 58 SBC-400 User's Manual B Installing PC/104 Modules This appendix gives instructions for installing PC/104 module. Appendix B Installing PC/104 Modules 59 APPENDIX Installing PC/104 modules The SBC-400's PC/104 connectors give you the flexibility to attach PC/104 expansion modules. These modules perform the functions of traditional plug-in expansion cards, but save space and valuable slots. Modules include: • PCM-3290 GPS Module • PCM-3810 Solid-state Disk Module • PCM-3820 High Density Flash Disk Module • PCM-3110 PCMCIA Module • PCM-3111 Secondary PCMCIA Module • PCM-3610 Isolated RS-232 and RS-422/485 Module • PCM-3660 Ethernet Module • PCM-3718 30 KHz A/D Module • PCM-3724 48-channel DIO Module • PCM-3910 Breadboard Module To install these modules on the SBC-400 is a quick and simple operation. The following steps show how to mount the PC/104 modules: Step 1 Remove the SBC-400 from your system paying particular attention to the safety instructions already mentioned above. Step 2 Make any jumper or link changes required to the CPU card now. Once the PC/104 module is mounted you may have difficulty in accessing these. Step 3 Normal PC/104 modules have "male" connectors and mount directly onto the main card. However, for reasons that ensure better bus matching, the connectors on the SBC-400 and the PC/104 module are both "female". For this reason you need to plug-in a "male- male" adapter connecter (included with the SBC-400). Please refer to the following PC/104 module mounting diagram on the following page. After this is in place you then have the correct mounting connector to accept your PC/104 module. 60 SBC-400 User's Manual Step 4 Mount the PC/104 module onto the CPU card. Do this by pressing the module firmly but carefully onto the mounting connectors. Step 5 Secure the PC/104 module onto the CPU card using the four mounting spacers and srews. PC/104 Mounting Support Female Male Male Female Male PC/104 Module SBC-350A 400 PC/104 Mounting Adaptor CPU Card PC/104 Module Mounting Diagram Appendix B Installing PC/104 Modules 61 3.500 3.250 3.775 3.575 3.575 0.200 0.200 0 0.200 3.350 3.550 0 PC/104 module dimensions (inches –5 %) 62 SBC-400 User's Manual