48h

	Appendix B: BIOS POST Checkpoint Codes

Checkpoint	Code Description
48h	Patterns written in base memory. Determining the amount of memory
	below 1 MB next.
49h	The amount of memory below 1 MB has been found and verified.
	Determining the amount of memory above 1 MB memory next.
4Bh	The amount of memory above 1 MB has been found and verified.
	Checking for a soft reset and clearing the memory below 1 MB for
	the soft reset next. If this is a power on situation, going to checkpoint
	4Eh next.
4Ch	The memory below 1 MB has been cleared via a soft reset. Clearing
	the memory above 1 MB next.
4Dh	The memory above 1 MB has been cleared via a soft reset. Saving
	the memory size next. Going to checkpoint 52h next.
4Eh	The memory test started, but not as the result of a soft reset.
	Displaying the first 64 KB memory size next.
4Fh	The memory size display has started. The display is updated during
	the memory test. Performing the sequential and random memory test
	next.
50h	The memory below 1 MB has been tested and initialized. Adjusting
	the displayed memory size for relocation and shadowing next.
51h	The memory size display was adjusted for relocation and shadow-
	ing.
	Testing the memory above 1 MB next.
52h	The memory above 1 MB has been tested and initialized. Saving
	the memory size information next.
53h	The memory size information and the CPU registers are saved.
	Entering real mode next.
54h	Shutdown was successful. The CPU is in real mode. Disabling the
	Gate A20 line, parity, and the NMI next.
57h	The A20 address line, parity, and the NMI are disabled. Adjusting
	the memory size depending on relocation and shadowing next.
58h	The memory size was adjusted for relocation and shadowing.
	Clearing the Hit <DEL> message next.
59h	The Hit <DEL> message is cleared. The <WAIT...> message is
	displayed. Starting the DMA and interrupt controller test next.

B-5

X6DVA-EG, X6DVA-4G specifications

American Megatrends is renowned for its innovative server and motherboard solutions. The X6DVA-4G and X6DVA-EG motherboards are notable examples that cater to enterprise-level applications and high-performance computing environments. Both motherboards are designed to support the latest advancements in technology while providing robust features for reliable performance.

The X6DVA-4G is an ATX motherboard that boasts dual Socket 604 configurations, allowing it to support dual Intel Xeon processors. This dual-processor setup significantly enhances computing power, making it suitable for resource-intensive applications, such as virtualization, high-performance computing, and database management. Its support for up to 64GB of DDR2 ECC memory ensures data integrity and stability during critical operations, providing an additional layer of reliability that is crucial for enterprise environments.

On the other hand, the X6DVA-EG offers similar capabilities while integrating different feature sets that cater to specific needs. Both boards support PCI-X and PCIe expansion slots, which allow for flexible hardware configurations. This expandability is vital in businesses where evolving technology demands can lead to the need for additional peripherals and components.

A standout feature of these motherboards is their comprehensive support for RAID configurations, including RAID 0, 1, 10, and 5. This functionality enhances data security and recovery, ensuring that critical information remains intact in the event of hardware failure. Additionally, both motherboards come equipped with multiple SATA interfaces for robust storage options, which are essential for handling large volumes of data.

Furthermore, Intel's Xeon processors, paired with the X6DVA series motherboards, enable advanced thermal management and power efficiency features. This is essential not only for maintaining optimal performance but also for reducing operational costs in data centers.

In conclusion, American Megatrends' X6DVA-4G and X6DVA-EG motherboards maintain the company's reputation for quality and reliability in high-performance computing solutions. With their dual-processor capabilities, extensive memory support, RAID functionality, and flexibility for expansion, these motherboards are exceptional choices for businesses looking to enhance their computing infrastructure. Their combination of performance, efficiency, and reliability makes them integral components for modern server solutions.

Checkpoint

X6DVA-EG, X6DVA-4G specifications