Lcg Self Tests - Digital Equipment VAXstation 4000 VLC Service Information

4.2.0.2 LCG Self Tests

Self Test
Video Test
Register Test
FIFO Test
AG Test
Virtual
Addressing
Mode Test
The LCG self test does not run in user mode (diagenv 1) as it clears
the console. Refer to Section 4.4.2.5 for information on Diagenv
parameters.
Refer to Table 4–1 and Table 4–2 for information on how to run the LCG self
test. Refer to Section A.1.11 for a list of the LCG self-test error codes and
Section B.1.7 for a list of the LCG diagnostic LED codes.
The low resolution frame buffer clock jumpers must be correctly
installed before power-up.
The panel Alternate Console switch must be down for graphics console
and up for the DZ port.
Function
Tests the communication between the S-chip and VRAM. It
initializes the brooktree, sets up the video screen, and sets up
the video registers in the S-chip.
Uses the longword format to read/write test all LCG S-chip registers.
Creates a FIFO and clip list in the contiguous physical memory and
tests set up packets, int/status bits, put/get pointers, FIFO, and clip
control flags, FIFO status bits, and ensures that the FIFO can be
reset.
Calls all of the LCG address generator-specific self-test routines.
These routines test the drawing functions, logic unit functions, and
glyph functions.
Calls all of the LCG virtual drawing-specific self-test routines.
Note
Note
Diagnostic Testing
4.2 Running the Self Test
Diagnostic Testing 4–9