| Appendix B: BIOS POST Codes |
|
|
Checkpoint | Code Description |
60h | The DMA page register test passed. Performing the DMA Controller |
| 1 base register test next. |
62h | The DMA controller 1 base register test passed. Performing the DMA |
| controller 2 base register test next. |
65h | The DMA controller 2 base register test passed. Programming DMA |
| controllers 1 and 2 next. |
66h | Completed programming DMA controllers 1 and 2. Initializing the 8259 |
| interrupt controller next. |
67h | Completed 8259 interrupt controller initialization. |
7Fh | Extended NMI source enabling is in progress. |
80h | The keyboard test has started. Clearing the output buffer and |
| checking for stuck keys. Issuing the keyboard reset command next. |
81h | A keyboard reset error or stuck key was found. Issuing the keyboard |
| controller interface test command next. |
82h | The keyboard controller interface test completed. Writing the com- |
| mand byte and initializing the circular buffer next. |
83h | The command byte was written and global data initialization has |
| completed. Checking for a locked key next. |
84h | Locked key checking is over. Checking for a memory size mismatch |
| with CMOS RAM data next. |
85h | The memory size check is done. Displaying a soft error and checking |
| for a password or bypassing WINBIOS Setup next. |
86h | The password was checked. Performing any required programming |
| before WINBIOS Setup next. |
87h | The programming before WINBIOS Setup has completed. |
| Uncompressing the WINBIOS Setup code and executing the |
| AMIBIOS Setup or WINBIOS Setup utility next. |
88h | Returned from WINBIOS Setup and cleared the screen. Performing |
| any necessary programming after WINBIOS Setup next. |
89h | The programming after WINBIOS Setup has completed. Displaying the |
| power on screen message next. |
8Bh | The first screen message has been displayed. The <WAIT...> |
| message is displayed. Performing the PS/2 mouse check and |
| extended BIOS data area allocation check next. |
8Ch | Programming the WINBIOS Setup options next. |
8Dh | The WINBIOS Setup options are programmed. Resetting the hard disk |
| controller next. |
8Fh | The hard disk controller has been reset. Configuring the floppy drive |
| controller next. |
91h | The floppy drive controller has been configured. Configuring the hard |
| disk drive controller next. |
