Technical data

VGA54XX - Video Diagnostics Tests
http://www.motorola.com/computer/literature 3-137
3
GRPH - Graphics Controller Registers
Command Input
PPCx-Diag>VGA54XX GRPH
Description
This test verifies the correct operation of the VGA Graphics Controller
Registers. The test proceeds as follows:
1. Each Graphics Controller Register is initialized with one of 256
possible values, with reserved bits being masked off to a value of
zero.
2. The Graphics Controller 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 GRPH: Graphics Control Registers ...Running ->
If all parts of the test are completed correctly, then the test passes:
VGA54XX GRPH: Graphics Control Registers....Running -> PASSED
If the test fails, then the display appears as follows:
VGA54XX GRPH: Graphics Control Registers ...Running -> FAILED
VGA54XX/GRPH Test Failure Data:
(error message)
If the error is in one of the index registers, then (error message) is:
Index register: _____
Value read: _____ Expected: _____
Otherwise, (error message) is:
Data register: _____
Value read: _____ Expected: _____