Memory Errors (3545)

Memory Errors

If the POST detects a memory error in the first 640KB of system memory, all of the first 2MB of memory is de-allocated and the test continues with the second 640KB of the second 2MB of memory. If the total amount of error free memory becomes less than 2MB, a 2XX POST error occurs and the system stops. All of the 20MB (maximum) memory is used as system memory. The memory write and read test proceeds through the IC DRAM memory. When the POST memory test has completed, the usable memory size is compared with the configuration data and if a mismatch is detected, a 2XX error code occurs. The user can continue with system operation by pressing F1 and call for service at a later time.

The memory sizes that are de-allocated because of the POST process is kept by the hibernation or suspend functions. To test this memory, it must be re-configured as part of the original memory size. The memory re-configuring is done by turning power-off and on.

De-allocation support is done only by the POST for memory errors. All unrecoverable memory errors that occur during normal operation cause an interrupt to the operating system.

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