ADLINK NuPRO-A40H Industrial Single Board Computer Hardware Deployment and BIOS Calibration Guide

IRQ routing (APIC mode): In PIC mode, IRQ 9 is SCI, and IRQ 10/11/12/14/15 can be assigned to PCI/ISA devices; In APIC mode, PCIe root ports and onboard devices (such as I211 network cards, SATA controllers, USB EHCI) occupy vectors such as IRQ 16~23, respectively. If there is a conflict when inserting a third-party PCI card, the PIRQ routing can be manually adjusted in the BIOS (Table B-7 provides the mapping relationship between PIRQ A~H and INT A~D). Special reminder: ISA devices need to reserve corresponding IRQs in the BIOS to avoid being occupied by PCI allocation.

Watch Dogs (WDT) and SEMA Monitoring Practice

The watchdog timer of NuPRO-A40H is controlled through the SEMA driver interface. The official Windows driver (Sema. sys) and sample code (based on C language) are provided, with the core function being Sema_StartWatchdog (seconds). Typical process:

Install WDT driver to C:  Windows  System32  drivers;

Call Sema_init() during application initialization;

Set timeout value (e.g. 60 seconds) and start counting;

Periodically clear the counter with SemaRefreshWatchdog() in the task loop;

If the timeout does not trigger a refresh, the hardware will automatically generate a system reset (RESET).

SEMA also provides real-time reading APIs for temperature, voltage, and fan speed, which can be used to build local status panels or remote operation and maintenance alarms.

Common engineering problems and troubleshooting suggestions

Possible causes and solutions for the phenomenon

No display when powered on, CPU not installed correctly/poor memory contact/12V power supply not connected. Reinstall the CPU, clean the memory gold fingers, and check if CN24 is securely plugged in

The system cannot recognize SATA hard disk. Improper SATA mode setting (such as RAID but actually no array). Enter BIOS and change to AHCI or IDE, and check the data cable

COM1 communication garbled mode jumper inconsistent with BIOS settings. Check if CN16/CN31 matches BIOS CDMA Mode (232/422/485)

USB keyboard is invalid under DOS. Legacy USB Support is not enabled. Set Legacy USB Support to Enabled in BIOS

Watchdog not triggering reset WDT disabled by jumper CN14. Check if CN14 is 1-2 (Normal)

The incoming call does not start automatically. AC Power Loss is set to Power Off and changed to Power On or Last State

PCI card interrupt conflict IRQ allocation overlaps in BIOS to reserve IRQ for ISA devices or adjust PCI card slot position

Driver installation and system compatibility

The accompanying ADLINK All in One DVD provides Windows XP/Windows 7 (32/64 bit) and Linux (Fedora 17/RHEL) drivers. Suggested installation sequence:

Chipset driver (Intel INF Update);

Display driver (requires installation of. NET Framework 3.5 SP1 first);

Network driver (Intel I211);

Audio driver (only when using DB-Audio2 daughter card).

For Windows 7 and above systems, the operating system comes with most of the drivers, but it is recommended to manually install chipset and network card drivers for optimal performance.