CS8920 datasheet(62/66 Pages) CIRRUS

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AN84REV1

CS8920 Technical Reference Manual

4) Select “Diagnostics” (ALT-G) from

the main menu.

• Select “Self-Test” to test the

adapter’s basic functionality.

• Select “Network Test” to test the

network connection and cabling.

4.2.3.1 Diagnostic Self-Test

The diagnostic self-test checks the

adapter’s basic functionality as well as

its ability to communicate across the

ISA bus based on the system resources

assigned during hardware configuration.

The following tests are performed:

• IO Register Read/Write Test

The IO Register Read/Write test

insures that the CS8920 can be

accessed in IO mode, and that the IO

base address is correct.

• Shared Memory Test

The Shared Memory test insures the

CS8920 can be accessed in memory

mode and that the range of memory

addresses assigned does not conflict

with other devices in the system.

• Interrupt Test

The Interrupt test insures there are no

conflicts with the assigned IRQ

signal.

• DMA Channel Test

The DMA channel test insures there

are no conflicts with the assigned

DMA channel.

• EEPROM Test

The EEPROM test insures the

EEPROM can be read.

• Chip RAM Test

The Chip RAM test insures the 4K of

memory internal to the CS8920 is

working properly.

• Internal Loop-back Test

The Internal Loop Back test insures

the adapter’s transmitter and receiver

are operating properly. If this test

fails, make sure the card is properly

attached to the network (check for

LED activity for example).

• Boot PROM Test

The Boot PROM test insures the

Boot PROM is present and can be

read. Failure indicates the Boot

PROM was not successfully read due

to a hardware problem or due to a

conflicts on the Boot PROM address

assignment. (Test only applies if the

adapter is configured to use the Boot

PROM option.)

Failure of a test item indicates a possible

system resource conflict with another

device on the ISA bus. In this case, you

should use the Manual Setup option to

reconfigure the adapter by selecting a

different value for the system resource

that failed (see section 4.2.2).

4.2.3.2 Diagnostics Network Test

The Diagnostic Network Test verifies a

working network connection by

transferring data between two CS8920

adapters installed in different PCs on the

same network. (Note: the diagnostic

network test should not be run between

two nodes across a router.)

This test requires that each of the two

PCs have a CS8920 card installed and

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