Intel DC3217BY Technical Product Specification - Page 62
Port 80h POST Codes
View all Intel DC3217BY manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 62 highlights
Intel Desktop Board D33217CK Technical Product Specification 4.3 Port 80h POST Codes During the POST, the BIOS generates diagnostic progress codes (POST codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h. This code is useful for determining the point where an error occurred. Displaying the POST codes requires a POST card that can interface with the Debug header. Refer to the location of the Debug header in Figure 1. The following tables provide information about the POST codes generated by the BIOS: • Table 27 lists the Port 80h POST code ranges • Table 28 lists the Port 80h POST codes themselves • Table 29 lists the Port 80h POST sequence NOTE In the tables listed above, all POST codes and range values are listed in hexadecimal. Table 27. Port 80h POST Code Ranges Range Subsystem 0x00 - 0x05 Entering SX states S0 to S5. 0x10, 0x20, 0x30, Resuming from SX states (0x10 -0x20 - S2, 0x30 - S3, etc.) 0x40, 0x50 0x01 - 0x0F Security (SEC) phase 0x11 - 0x1F PEI phase pre MRC execution 0x21 - 0x29 MRC memory detection 0x2A - 0x2F PEI phase post MRC execution 0x31 - 0x35 Recovery 0x36 - 0x3F Platform DXE driver 0x41 - 0x4F CPU Initialization (PEI, DXE, SMM) 0x50 - 0x5F I/O Buses: PCI, USB, ATA etc. 0x5F is an unrecoverable error. Start with PCI. 0x60 - 0x6F BDS 0x70 - 0x7F Output devices: All output consoles. 0x80 - 0x8F For future use 0x90 - 0x9F Input devices: Keyboard/Mouse. 0xA0 - 0xAF For future use 0xB0 - 0xBF Boot Devices: Includes fixed media and removable media. Not that critical since consoles should be up at this point. 0xC0 - 0xCF For future use 0xD0 - 0xDF For future use 62