| Appendix B: BIOS POST Checkpoint Codes |
|
|
Checkpoint | Code Description |
95h | Initializing the bus option ROMs from C800 next. See the last page of |
| this chapter for additional information. |
96h | Initializing before passing control to the adaptor ROM at C800. |
97h | Initialization before the C800 adaptor ROM gains control has com- |
| pleted. The adaptor ROM check is next. |
98h | The adaptor ROM had control and has now returned control to BIOS |
| POST. Performing any required processing after the option ROM |
| returned control. |
99h | Any initialization required after the option ROM test has completed. |
| Configuring the timer data area and printer base address next. |
9Ah | Set the timer and printer base addresses. Setting the |
| address next. |
9Bh | Returned after setting the |
| required initialization before the Coprocessor test next. |
9Ch | Required initialization before the Coprocessor test is over. Initializing |
| the Coprocessor next. |
9Dh | Coprocessor initialized. Performing any required initialization after |
| the Coprocessor test next. |
9Eh | Initialization after the Coprocessor test is complete. Checking the |
| extended keyboard, keyboard ID, and Num Lock key next. Issuing the |
| keyboard ID command next. |
A2h | Displaying any soft errors next. |
A3h | The soft error display has completed. Setting the keyboard typematic |
| rate next. |
A4h | The keyboard typematic rate is set. Programming the memory wait |
| states next. |
A5h | Memory wait state programming is over. Clearing the screen and |
| enabling parity and the NMI next. |
A7h | NMI and parity enabled. Performing any initialization required before |
| passing control to the adaptor ROM at E000 next. |
A8h | Initialization before passing control to the adaptor ROM at E000h |
| completed. Passing control to the adaptor ROM at E000h next. |
A9h | Returned from adaptor ROM at E000h control. Performing any |
| initialization required after the E000 option ROM had control next. |
Aah | Initialization after E000 option ROM control has completed. Displaying |
| the system configuration next. |
Abh | Uncompressing the DMI data and executing DMI POST initialization |
| next. |
B0h | The system configuration is displayed. |
B1h | Copying any code to specific areas. |
00h | Code copying to specific areas is done. Passing control to INT 19h |
| boot loader next. |