AT&T 3B2 Off-Line Diagnostic Manual page 427

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Test Number:
Function:
Procedure:
(27)
This test verifies the ability of the DUART to send an interrupt when Receive
buffer full (3 characters) is detected on DUART 0, Port 1.
Port 1 is initialized to transmit and receive interrupts. The interrupts consist of
8 bits, no parity, and 2 Stop bits. The baud rate is set to 9600 bps. Transmit
three characters over DUART 0, Port 1. Check for an interrupt. Verify that the
character transmission is correct.
Hardware Tested: The DUART 0 (SC2681) is tested.
Data Returned: The number of the failing test, the ASCII character received, and the ASCII
character transmitted are returned.
Test Number:
Function:
Procedure:
(28)
This test verifies the ability of the DUART to send an interrupt when Receive
buffer full (3 characters) is detected on DUART 0, Port 2.
Port 2 is initialized to transmit and receive interrupts. The interrupts consist of
8 bits, no parity, and 2 Stop bits. The baud rate is set to 9600 bps. Transmit
three characters over DUART 0, Port 2. Check for an interrupt. Verify that the
character transmission is correct.
Hardware Tested: The DUART 0 (SC2681) is tested.
Data Returned: The number of the failing test, the ASCII character received, and the ASCII
character transmitted are returned.
Test Number: (29)
Function: This test verifies the ability of the DUART to send an interrupt when a break
character is detected on DUART 0, Port 1.
Procedure: Port 1 is initialized to transmit and receive interrupts. The interrupts consist of
7 bits, no parity, and 2 Stop bits. The baud rate is set to 9600 bps. Set the
DUART to send an interrupt when a break character is detected. Enable
transmitter and receiver. Start break and check that the interrupt was correctly
received.
Hardware Tested: The DUART 0 (SC2681) is tested.
Data Returned: The number of the failing test, the ASCII character received, and the ASCII
character transmitted are returned.
PORTS DIAGNOSTICS 8-49