Technical data

Table 2–5 lists the tests that are included in the graphics self-test.
Table 2–5 Graphics Self-Test (2)
Self-Test Function
Video test Tests the VRAM cache memory and the communication between the
S-chip and VRAM.
Initializes the Brooktree and sets up the video screen.
Sets up the video registers in the S-chip.
Register test Uses the longword format to read/write test all graphics S-chip
registers.
FIFO test Creates a FIFO and clip list in the contiguous physical memory and
tests setup packets, int/status bits, put/get pointers, FIFO and clip
control flags, FIFO status bits. Makes sure that the FIFO can be
reset.
AG test Calls all of the graphics address generator specific self-test routines.
These routines test the drawing functions, logic unit functions, and
glyph functions.
Virtual
Addressing
Mode test
Calls all the graphics virtual drawing specific self-test routines.
Refer to Section A.2.20 for a list of the LCG self-test error codes and to
Section B.5 for a list of the LCG diagnostic LED codes.
2.8.3 DZ Self-Test (T 3)
Setup Notes:
• The DZ interrupt test fails in the Digital Services or manufacturing
environments if no external loopbacks are present on the communication
ports.
• The pointing device test fails if the pointing device is not plugged in and
the console is a video device.
• When you are in the Digital Services or manufacturing environments,
loopbacks must be used on the standard communications port.
2–14 Diagnostic Testing