Motorola MVME712A/D3 User Manual download pdf (Page 105)

ECC Memory Board (MCECC) Tests

MVME167BUG/D3 3-61

Single-Bit-Error - SBE

This function tests the ECC board's ability to correct single-bit-errors. It fills a

memory area with random data containing a "single-bit-error" in each word.

All of the tested memory area is then verified with error correction enabled, so

that the data will be "corrected" during the read operation.

Command Input:

167-Diag>MCECC SBE

Response/Messages:

If "verbose" execution has been configured with the CF command, something

will be printed on the status line to let you know that the test is still running.

The first message indicates that the ECC checkbits are being initialized. The

format of the status update is: ________

# where the "________" portion is

the current address being accessed, the "x" is replaced by either "

w" or "r"

depending on whether the current pass through memory is write/read. The

"#" indicates the memory board number being tested.

ECC SBE: ECC Single-Bit-Error.......... Running ---> bd # init

ECC SBE: ECC Single-Bit-Error.......... Running ---> ________ x#

ECC SBE: ECC Single-Bit-Error.......... Running ---> PASSED

If an error is detected during the operation of the test, one of the following

messages is displayed:

Failures due to the scrubber during checkbit initialization:

Timed out waiting for scrubber to start, bd #_ (status __)

Timed out waiting for scrubber to stop, bd #_ (status __)

Errors due to single-bit-errors not being corrected properly:

Address=________, Expected=________, Actual=________

The test ends with:

ECC SBE: ECC Single-Bit-Error............. Running ---> FAILED

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Motorola MVME712A/D3 User Manual Page 105