SUN 3/260 CPU ERROR CODE FOR THE CPU LEDS
  
DESCRIPTION
  
The diagnostic light display if for Sun 3/260 CPUs only.
LSB  MSB
  LEDS	WHAT THE SYSTEM IS DOING	WHAT PART OF THE 
*=ON  0=OFF	             (LEDS CYCLING)	SYSTEM FAILED (FROZEN)
**** ****	A reset sets LEDs to this state
	CPU, BOOT PROM, +5VDC
*000 0000	Test 1 checking the boot PROM
	BOOT PROM
0*00 0000	Test 2 checking the DVMA reg
	CPU card
**00 0000	Test 3 checking the Context reg
	MMU section of the CPU card
00*0 0000	Test 4 segment map RAM w/r test
	MMU section of the CPU card
*0*0 0000	Test 5 checking segment map RAM
	MMU section of the CPU card
0**0 0000	Test 6 checking page map RAM
	MMU section of the CPU card
***0 0000	Test 7 checking memory data path
	Resident or expansion memory
000* 0000	Test 8 checking bus error detection
	CPU bus error register (back out all CCAs to find bad board)
*00* 0000	Test 9 checking interrupt capabilities
	CPU card (or lithium battery)
0*0* 0000	Test 10 checking MMU read access
	CPU card
**0* 0000	Test 11 checking MMU write access
	CPU card
00** 0000	Test 12 writing to an invalid page
	MMU section of CPU card
*0** 0000	Test 13 writing to a protected page
	MMU section of CPU card
0*** 0000	Test 14 check does not make parity
	Parity latch on CPU card
**** 0000	Test 15 check does make parity
	Parity latch on CPU card
0000 *000	Test 16 initiates memory test
	Resident or expansion memory
0000 000*	Self test error report
	CPU or expansion memory card
0000 00*0	Exception class error report
	CPU, BOOT PROMS
0000 0*00	Self test done, heartbeat
	Waiting for boot
*_*_ *_*_	Walking 1's pattern.  UNIX executing successfully
If you are running to a standard bit map display at the successful conclusion of these self tests you will see the 'heartbeat' LED flashing.  If SunOS successfully boots you will see a 'walking ones' pattern.  If you do not have a display on the monitor you either have a bad monitor/cable or an incorrect EEPROM setting at locations 0x16 and 0x1f.
  
SEE ALSO
  
Sun hardware manuals.