Altos 12000 Series User’s Guidex3.7.2 Installing and Removing a DIMM............................................... 3-183.8 SCSI Backplane Board ............................................................................. 3-193.8.1 Features ......................................................................................... 3-193.8.2 Layout............................................................................................ 3-203.8.3 Hard Disk ID Switch Settings...................................................... 3-213.8.4 Dual Channel Configuration........................................................ 3-223.9 Error Messages ........................................................................................ 3-253.9.1 Software Error Messages ............................................................. 3-253.9.2 System Error Messages ................................................................ 3-253.9.2 Hard Disk ID Switch Settings ..................................................... 3-263.9.3 Correcting Error Conditions ....................................................... 3-29Chapter 4 BIOS Utility4.1 Entering Setup ........................................................................................... 4-24.2 System Information ................................................................................... 4-44.2.1 Processor 1 and 2 ............................................................................ 4-54.2.2 Processor Speed .............................................................................. 4-54.2.3 Internal Cache ................................................................................. 4-54.2.4 External Cache ................................................................................ 4-64.2.5 Diskette Drive A ............................................................................. 4-64.2.6 Diskette Drive B.............................................................................. 4-64.2.7 IDE Primary Channel Master ........................................................ 4-64.2.8 IDE Primary Channel Slave ........................................................... 4-64.2.9 IDE Secondary Channel Master .................................................... 4-64.2.10 IDE Secondary Channel Slave ....................................................... 4-74.2.11 Total Memory ................................................................................. 4-74.2.12 Serial Port 1 ..................................................................................... 4-74.2.13 Serial Port 2 ..................................................................................... 4-74.2.14 Parallel Port..................................................................................... 4-7