Owner`s manual

B.3 KA65A Error LED
The KA65A error LED (bottom red LED) is an error summary
or indicates the state of backup cache.
Table B–2: KA65A Error LED
XCR0<14> XCR0<13> Error LED ON
0 0 Error summary (power-up state)
0 1 Backup cache is off
1 0 Error summary or backup cache is off
1 1 Off—Error LED does not light
Example B–1: Examining the XCR0 and XBER Registers
>>> E/P/L E1880024 ! Examine the XCR0 register of the KA65A
E1880024 00000200 ! processor in slot 1. The result shows
! bits 14 and 13 are clear.
>>> E/P/L E1880004 ! Then examine the XBER register of the
E1880004 8000A300 ! same processor. The result shows bit
! 31 is set.
B–6 VAX 6000: Installing Model 500 Processors