Post Code Checkpoints, Primary I/O port

	POST Code Checkpoints
	The POST code checkpoints are the largest set of checkpoints during the BIOS pre-
	boot process. TABLE A-2describes the type of checkpoints that might occur during
	the POST portion of the BIOS. These two-digit checkpoints are the output from
	primary I/O port 80.
TABLE A-2POST Code Checkpoints

Post Code	Description

03	Disable NMI, Parity, video for EGA, and DMA controllers. At this point, only ROM
	accesses go to the GPNV. If BB size is 64K, turn on ROM Decode below FFFF0000h. It
	should allow USB to run in the E000 segment. The HT must program the NB specific
	initialization and OEM specific initialization, and can program if it need be at beginning of
	BIOS POST, similar to overriding the default values of kernel variables.
04	Check CMOS diagnostic byte to determine if battery power is OK and CMOS checksum is
	OK. Verify CMOS checksum manually by reading storage area. If the CMOS checksum is
	bad, update CMOS with power-on default values and clear passwords. Initialize status
	register A. Initialize data variables that are based on CMOS setup questions. Initialize both
	the 8259-compatible PICs in the system.
05	Initialize the interrupt controlling hardware (generally PIC) and interrupt vector table.
06	Do R/W test to CH-2 count reg. Initialize CH-0 as system timer. Install the POSTINT1Ch
	handler. Enable IRQ-0 in PIC for system timer interrupt. Traps INT1Ch vector to
	“POSTINT1ChHandlerBlock.”
C0	Early CPU Init Start--Disable Cache--Init Local APIC.
C1	Set up boot strap processor information.
C2	Set up boot strap processor for POST. This includes frequency calculation, loading BSP
	microcode, and applying user requested value for GART Error Reporting setup question.
C3	Errata workarounds applied to the BSP (#78 & #110).
C5	Enumerate and set up application processors. This includes microcode loading and
	workarounds for errata (#78, #110, #106, #107, #69, #63).
C6	Re-enable cache for boot strap processor, and apply workarounds in the BSP for errata
	#106, #107, #69, and #63 if appropriate. In case of mixed CPU steppings, errors are sought
	and logged, and an appropriate frequency for all CPUs is found and applied. NOTE: APs
	are left in the CLI HLT state.
C7	The HT sets link frequencies and widths to their final values. This routine gets called after
	CPU frequency has been calculated to prevent bad programming.
0A	Initializes the 8042 compatible Keyboard Controller.
0B	Detects the presence of PS/2 mouse.
0C	Detects the presence of Keyboard in KBC port.

Appendix A Event Logs and POST Codes

X4140, X4440, X4240 specifications

Sun Microsystems was a prominent player in the computing industry, known for its innovative and powerful server systems. Among its notable offerings were the Sun Fire X4240, X4440, and X4140 servers, which made significant inroads in the market for high-performance computing solutions.

The Sun Fire X4240 server was designed to meet the demands of data-intensive applications. It offered impressive scalability, supporting up to 64 GB of DDR2 memory across its eight memory slots. This server utilized AMD Opteron processors, which provided excellent performance thanks to their multi-core architecture. The X4240 also featured a flexible I/O architecture, allowing for various configurations tailored to specific workload requirements.

Next in line was the Sun Fire X4440, which expanded on the capabilities of the X4240. This server was particularly valuable for virtualization and consolidation tasks. It featured up to 128 GB of memory and supported more CPU options, with dual- and quad-core Opteron processors available. The X4440 also included a high-density design that enabled increased storage capacity, accommodating up to 12 SFF drives. This made it ideal for databases and enterprise applications needing fast access to large volumes of data.

Finally, the Sun Fire X4140 brought a balance of performance and efficiency. Like its counterparts, it supported AMD's Opteron processors, delivering robust processing power. The X4140 was designed for environments where space and power efficiency were critical. It was notable for its compact form factor, which allowed organizations to pack more servers into less physical space without sacrificing performance. The server architecture included advanced thermal management technologies, ensuring optimal airflow and cooling, which contributed to reliability in demanding environments.

In terms of connectivity, all three servers featured multiple Gigabit Ethernet ports, offering redundant network connectivity essential for enterprise-level applications. The integrated management interfaces simplified server monitoring and maintenance, ensuring that IT administrators could efficiently manage their resources.

In summary, the Sun Fire X4240, X4440, and X4140 were pivotal servers from Sun Microsystems that provided robust performance, scalability, and efficiency. Their features made them suitable for a variety of workloads, from virtualization to data management, cementing their place in the server market during their era.

Sun Microsystems X4440, X4240, X4140 manual Post Code Checkpoints, Primary I/O port

Models: X4140 X4440 X4240

POST Code Checkpoints

primary I/O port 80.

TABLE A-2POST Code Checkpoints

Appendix A Event Logs and POST Codes

X4140, X4440, X4240 specifications