BIOS POST Codes - Page 4 of 6


Code LED Display Description
60h The DMA page register test passed. About to verify from display memory.
61h The display memory verification test is done. About to perform the DMA Controller 1 base register test.
62h The DMA Controller 1 base register test passed. Performing the DMA Controller 2 base register test next.
63h The DMA Controller 2 base register test passed. Performing the BIOS ROM data area check next.
64h The BIOS ROM data area check is partially done. The BIOS ROM data area check is completed next.
65h The BIOS ROM data area check is done. Programming the DMA Controllers 1 and 2 next.
66h DMA Controller 1 and 2 programming was completed. Initializing the 8259 interrupt controller next.
67h The 8259 initialization is done. Starting the keyboard test next.
80h The keyboard test has started. Issuing the keyboard reset command next and clearing the output buffer.
81h The keyboard reset command completed successfully. Next, checking the stuck keys and issuing the interface test command if there was an error.
82h The keyboard controller interface test is done. About to write a command byte and initialize the circular buffer.
83h The command byte has been written and the global data initialization is done. About to check for locked keys.
84h Lock key checking is done. About to check for a memory size mismatch with CMOS RAM data.
85h The memory size check has been completed. About to display a soft error and check for password or bypass Setup.
86h The password has been checked. About to do programming before Setup.
87h The programming before Setup has been completed. Calling the BIOS Setup program next.
88h Returned from the BIOS Setup program and cleared the screen. Programming after Setup.
89h The programming after Setup is completed. Displaying the Power-On screen message next.
8Ah The first screen message has been displayed. About to display the OWait...O message.
8Bh The OWait...O message has been displayed. About to perform system and video BIOS shadowing.
8Ch System and video BIOS shadowing was successful. About to perform Setup options programming after Standard CMOS Setup.
8Dh The Setup options are programmed. The mouse check and initialization is done next.
8Eh The mouse check and initialization is done. Checking the floppy disk next.
8Fh The floppy disk check indicated that the floppy drive needs to be initialized. Floppy drive configuration is next.
 

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