Technical data

5-32 PROM Monitor
5.7.4 IP21 LED Error Codes
Table 5-8 lists the IP21 board power-on test failure LED codes:
LED Pattern Displayed
X=Lit
O=Unlit
Description
(Flashing Value Displayed)
LSB X O X O O X MSB FLED_ICACHE_FAIL (37)
LSB O X X O O X MSB FLED_CANTSEEMEM (38) - Flashed by slave processors if they
take an exception while trying to write their evconfig entries.
Often means the processor’s getting D-chip parity errors.
LSB X X X O O X MSB FLED_SCACHE_SIZE_INCONSISTENT (39) - Scache size is
inconsistent
LSB O O O X O X MSB FLED_IMPOSSIBLE1 (40) - We fell through one of the
supposedly unreturning subroutines. Really shouldn’t be
possible.
LSB X O O X O X MSB FLED_DEADCOP1 (41) - Coprocessor 1 is dead - not seeing this
doesn’t mean it works.
LSB O X O X O X MSB FLED_CCCLOCK (42) - Failed CC local register tests.
LSB X X O X O X MSB FLED_CCLOCAL (43) - Failed CC local register tests.
LSB X O X X O X MSB FLED_ACHIP (45) - Failed A Chip register tests
LSB O X X X O X MSB FLED_BROKEWB (46) - By the time this CPU had arrived at the
bootmaster arbitration barrier, the rendezvous time had passed.
This implies that a CPU is running too slowly, the ratio of bus
clock to CPU clock rate is too high, or a bit in the CC clock is stuck
on.
LSB X X X X O X MSB FLED_BADDCACHE (47) - This CPU’s primary data cache test
failed
LSB O O O O X X MSB FLED_BADIO4 (48) - The IO4 board is bad - can’t get to the
console.
LSB X O O O X X MSB FLED_UTLBMISS (49) - Took a TLB Refill exception
LSB O X O O X X MSB FLED_KTLBMISS (50) - Took a kernel TLB Refill exception
LSB X X O O X X MSB FLED_BADEAROM (51) - Scache test 2 doesn’t exist, so replace
it with FLED_BADEAROM. The EAROM was corrupted and
couldn’t be repaired.
LSB O O X O X X MSB FLED_GENERAL (52) - Took a general exception
LSB X O X O X X MSB FLED_NOTIMPL (53) - Took an unimplemented exception
LSB O X X O X X MSB FLED_SCACHE_SIZE_WRONG (54) - Bad scache size
LSB X X X O X X MSB FLED_SCACHE_TAG_JUMPER (55)
Table 5-8 IP21 Board Power-On Test Failure LEDs