Technical data

RAM - Local RAM Tests

http://www.motorola.com/computer/literature 3-97

ALTS - Alternating Ones/Zeros

Command Input

PPCx-Diag>RAM ALTS

Description

This test verifies addressing of memory in the range specified by the

configuration parameters for the RAM test group. Addressing errors are

sought by using a memory locations address as the data for that location.

This test is coded to use only 32-bit data entities. The test proceeds as

follows:

1. Location (n) is written with data of all bits 0.

2. The next location (n+4) is written with all bits 1.

3. Steps 1 and 2 are repeated throughout the specified memory range.

4. The memory is read and verified for the correct data pattern(s) and

any errors are reported.

Response/Messages

After the command has been issued, the following line is printed:

RAM ALTS: Alternating Ones/Zeroes........... Running --->

If all parts of the test are completed correctly, then the test passes:

RAM ALTS: Alternating Ones/Zeroes...Running ---> PASSED

If the test fails, then the display appears as follows:

RAM ALTS: Alternating Ones/Zeroes...Running ---> FAILED

RAM/ALTS Test Failure Data:

Data Miscompare Error:

Address =________, Expected =________, Actual =________