Windows Driver Kit: Driver Development Tools
Bug Check 0x9C: MACHINE_CHECK_EXCEPTION
The MACHINE_CHECK_EXCEPTION bug check has a value of 0x0000009C. This bug check indicates that a fatal machine check exception has occurred.
Parameters
The four parameters that are listed in the message have different meanings, depending on the processor type.
If the processor is based on an older x86-based architecture and has the Machine Check Exception (MCE) feature but not the Machine Check Architecture (MCA) feature (for example, the Intel Pentium processor), the parameters have the following meaning.
| Parameter | Description |
|---|
| 1 | The low 32 bits of P5_MC_TYPE Machine Service Report (MSR) |
| 2 | The address of the MCA_EXCEPTION structure |
| 3 | The high 32 bits of P5_MC_ADDR MSR |
| 4 | The low 32 bits of P5_MC_ADDR MSR |
If the processor is based on a newer x86-based architecture and has the MCA feature and the MCE feature (for example, any Intel Processor of family 6 or higher, such as Pentium Pro, Pentium IV, or Xeon), or if the processor is an x64-based processor, the parameters have the following meaning.
| Parameter | Description |
|---|
| 1 | The bank number |
| 2 | The address of the MCA_EXCEPTION structure |
| 3 | The high 32 bits of MCi_STATUS MSR for the MCA bank that had the error |
| 4 | The low 32 bits of MCi_STATUS MSR for the MCA bank that had the error |
On an Itanium-based processor, the parameters have the following meaning.
Note Parameter 1 indicates the type of violation.
| Parameter 1 | Parameter 2 | Parameter 3 | Parameter 4 | Cause |
|---|
| 0x1 | The address of the log | The size of the log | 0 | |
| 0x2 | The address of the log | The size of the log | The error code | The system abstraction layer (SAL) returned an error for SAL_GET_STATEINFO while processing MCA. |
| 0x3 | The address of the log | The size of the log | The error code | SAL returned an error for SAL_CLEAR_STATEINFO while it processed MCA. |
| 0x4 | The address of the log | The size of the log | 0 | Firmware (FW) reported a fatal MCA. |
| 0x5 | The address of the log | The size of the log | 0 | There are two possible causes:
- SAL reported a recoverable MCA, but this recovery is not currently supported.
- SAL generated an MCA but could not produce an error record.
|
| 0xB | The address of the log | The size of the log | 0 | |
| 0xC | The address of the log | The size of the log | The error code | SAL returned an error for SAL_GET_STATEINFO while processing an INIT event. |
| 0xD | The address of the log | The size of the log | The error code | SAL returned an error for SAL_CLEAR_STATEINFO while it processed an INIT event. |
| 0xE | The address of the log | The size of the log | 0 | |
Comments
For more information about Machine Check Architecture (MCA), see the Intel or AMD Web sites.
Note Starting with Windows Vista, this bug check is no longer supported, and has been replaced with bug Check 0x124: WHEA_UNCORRECTABLE_ERROR.