Sun Microsystems 280R manual Following table describes what each self-test does

The following table describes what each self-test does.

Test	Function
bbc	Tests the registers in the boot bus controller, and then verifies that at
	least one processor has boot bus access.
ebus	Accesses the Ebus through the RIO port and then tests DMA
	controller functionality.
flashprom	Performs a checksum and read/write test on the flash PROM
	containing the main logic board boot code.
gpio	Tests the registers of the general purpose input/output subsystem.
i2c@1,2e	Tests SEEPROM devices.
i2c@1,30	Tests SEEPROM devices and I2C port expanders. Also performs
	various read and write tests on the I2C temperature controller devices.
network	Tests the registers of the RIO Ethernet controller.
parallel	Tests the parallel port using both supported parallel port modes:
	ECPP and extended parallel mode.
pmc	Tests the registers of the power management controller.
rsc-control	Calls RSC POST and verifies loopback functionality through the RSC
	console.
rtc	Tests the registers of the realtime clock, then ensures that interrupts
	are firing correctly.
SUNW,qlc	Tests the registers of the Fibre Channel-Arbitrated Loop (FC-AL)
	subsystem.
scsi	Tests the SCSI disk controller registers and verifies DMA functionality.
serial	Tests the ttya and ttyb serial lines, and then performs an internal
	loopback test on each.
usb	Tests the registers on each RIO Universal Serial Bus.

Note –Use of the OpenBoot PROM configuration variable test-argscan affect the behavior of OpenBoot Diagnostics. The test-argsvariable is empty by default. Use the help command for more information on test-args.

Chapter 6 Diagnostics, Monitoring, and Troubleshooting 169