Technical data

RAM - Local RAM Tests

http://www.motorola.com/computer/literature 3-107

REF - Memory Refresh Testing

Command Input

PPCx-Diag>RAM REF

Description

The memory range and address increment is specified by the RAM test

directory configuration parameters. (Refer to

CF - Test Group Configuration

Parameters Editor

in Chapter 2.)

First, the real time clock is checked to see if it is functioning properly.

Second, each memory location to be tested has the data portion verified by

writing/verifying all zeros, and all ones. Next a data pattern is written to

the test location. After all the data patterns are filled for all test locations,

a refresh wait cycle is executed. After the wait cycle, the data is read, and

if the previously entered data pattern does not match the data pattern read

in, a failure occurs. If the data patterns match, then the test is passed.

Response/Messages

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

RAM REF: Memory Refresh Test..............Running --->

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

RAM REF: Memory Refresh Test........Running ---> PASSED

If any part of the test fails, then the display appears as follows:

RAM REF: Memory Refresh Test........Running ---> FAILED

RAM/REF Test Failure Data:

(error message)

Here

(error message)

is one of the following:

If the real time clock is not functioning properly, one of the following is

printed:

RTC is stopped, invoke SET command.

Or: