Self-Test Error Messages,
Continued
Mode Values
The mode values reported by some extended SCSI self-test errors
are as follows:
Table A–17 SCSI mode values
Mode
(hexadecimal)
Meaning
0
Asynchronous mode with programmed I/O
1
Asynchronous mode with DMA
2
Synchronous mode with DMA
Overview
The audio self-test (AUD) is divided into three major sections.
Register tests
Audio tests
Interrupt tests
Registers are tested by writing data then reading back the data,
or reading the READ_ONLY registers.
The audio test generates a sequence of eight tones and sends
them to the speaker. It also performs an internal digital loopback
through the MAP. This tests the three MUX channels and
corresponds to the three AUD$MAP_DIGITAL_LOOPBACK
errors.
The interrupt test generates interrupts by loading 8 bytes into
the D-channel transmit buffer and reading them back through the
receiver buffer (eight interrupts are generated).
Continued on next page
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