ecpptest Subtests

Internal Test FIFO Loopback 

Verifies DMA and PIO accesses to the ecpp device. It uses an Internal Test FIFO on the ecpp device. There are no printer or loopback connectors required. This test is always executed.

External Passive Loopback 

This verifies the parallel port I/O connections to the back panel connector. This test requires a passive loopback connector (Sun part no. 270-2965-01). This test is disabled by default and must be manually enabled by the user. 

Note: The external loopback test is intended for Sun internal manufacturing use only. It requires a custom loopback connector that is not available to an external customer. 

Printer test 

This verifies the parallel port printer operation. It outputs a half page of ASCII character data. The output mode (for example, ECP and Centronics) is determined by which mode the printer and ecpp driver automatically negotiate. It will not change the current mode. The user must verify that data printed properly. This test is disabled by default and must be manually enabled by the user.