B&B Electronics PC Watchdog Timer Card ATRWDT Manuel d'utilisateur télécharger pdf (Page 11)

P104-WDG-CSM User Manual

Hardware Installation

Before installing the board, please run Setup.exe. The Setup program can be used to assist

in configuring the two switches on the board. Our setup program will lead the user through

the process of setting the options on the board (the program does not set the options on the

board).

The PCI bus clock trace length from the CPU to the cards in the stack is tuned so that the

clock edge arrives at the interface when data is valid. Since boards in the PC/104 stack are at

different distances from the CPU, provision is made on the CPU board to supply four clock

signals with compensating trace lengths. Two signals from other groups must be likewise

selected: IDSEL and INT. When the PCI bus is being initialized, the operating system will

enable each card with a hard-wired select line and read it's configuration registers. An

address is assigned, space in the memory map and I/O map is reserved, etc. Similarly, the

CPU's interrupt controller resources (INTA, INTB, INTC, INTD) will be distributed among the

cards in the stack. A set of four-to-one multiplexers and two slide switches are used to select

which PCI clock, IDSEL and INT lines are routed to the board’s PCI bus interface.

Only four boards (not including the CPU) are allowed in a PC104-Plus stack, each board must

get a specific set of signals. These signals are selected with two slide switches, labeled SEL-

1 and SEL-2, which form a binary value to control the mux (SEL-1 is the least significant bit

and SEL-2 is the most significant bit). If the board is closest to the CPU, slide both switches

to the right. This will select the signal with the longest trace on the CPU board (signal group

0). If this product is the farthest board from the CPU, slide both switches to the left. This will

select the signal with the shortest trace on the CPU board (signal group 3). Place the SEL-1

switch to the left and SEL-2 to the right to select signal group 1, place the SEL-1 switch to the

right and SEL-2 to the left to select signal group 2.

1. Make sure to set switches and jumpers from either the Option Selection section of this

manual or from the suggestions of SETUP.EXE.

2. Do not install card into the computer until the software has been fully installed.

3. Turn OFF computer power AND unplug AC power from the system.

4. Gain access to the card stack and prepare it to receive this new card regarding

hardware & fasteners.

5. Plug the card onto the bus ensuring alignment of the PC/104 and PCI-104 pins.

6. Install an I/O cable onto the card’s header connector.

7. Inspect for proper fit of the card and cable and tighten the hardware.

8. Replace the enclosure/cover and turn ON the computer which should auto-detect the

card (depending on the operating system) and automatically finish installing drivers.

9. Run PCIfind.exe to complete installing the card into the registry (for Windows only) and

to determine the assigned resources.

10. Run one of the provided sample programs that was copied to the newly created card

directory (from the CD) to test and validate your installation.

The base address assigned by BIOS or the operating system can change each time new

hardware is installed into or removed from the computer. Please recheck PCIFind or Device

Manager if the hardware configuration is changed. Software you write can automatically

determine the base address of the card using a variety of methods depending on the

operating system. In DOS, the PCI\SOURCE directory shows the BIOS calls used to

determine the address and IRQ assigned to installed PCI devices. In Windows, the Windows

sample programs demonstrate querying the registry entries (created by PCIFind and

NTIOPCI.SYS during boot-up) to determine this same information.

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B&B Electronics PC Watchdog Timer Card ATRWDT Manuel d'utilisateur Page 11

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