Technical data

3-132 Computer Group Literature Center Web Site
Test Descriptions
3
ATTR - Attribute Register
Command Input
PPCx-Diag>VGA54XX ATTR
Description
This test verifies the correct operation of the VGA Attribute Registers. The
test proceeds as follows:
1. Each Attribute Register is initialized with one of 256 possible
values, with reserved bits being masked off to a value of zero.
2. The Attribute Register is read back to verify that the data that was
written to the register in step 1 was written correctly.
Response/Messages
After the command has been issued, the following line is printed:
VGA54XX ATTR: Attribute Registers........Running ->
If all parts of the test are completed correctly, then the test passes:
VGA54XX ATTR: Attribute Registers...Running -> PASSED
If the test fails, then the display appears as follows:
VGA54XX ATTR: Attribute Registers...Running -> FAILED
VGA54XX/ATTR Test Failure Data:
Read Register: _________ Index register: ________
Value Read: ________ Expected: ________