Sun Microsystems SPARCserver 1000 System Installation Manual page 56

BBC (BootBus Controller)
BBC2 (BootBus Controller 2)
BIC (Bus Interface Chip)
Board
Glossary-2
The BBC is an ASIC on the control board. The BBC works with a BBC2 on each
system board to control parts of the boot process. Among other functions, the
BBC2 provides SuperSPARC modules access to diagnostic code contained in
POST EPROMs on the system board. Other functions permit SuperSPARC
modules to access system status registers and the time-of-day (TOD) clock.
See BBC.
Four BICs on each system board connect the board to the backplane XDBus™.
The term board refers to printed circuit boards larger than a certain size (for
example, larger than 3x5-inch SBus cards and SPARC modules).
There are two types of boards in the SPARCserver 1000 system: system boards
(maximum of four) and control board (one only). See also Card and Module.
Relative sizes of the system board, SPARC module, and SBus card are:
System Board
(16x16 in.)
Note – The SPARCserver 1000 system board is not interchangeable with VME
boards.
See also specific board types: Control Board and System Board. See also
SuperSPARC Module and SBus Card.
SPARCserver 1000 System Installation Manual—June 1996
Control Board
(4x9 in.)
SBus Card
SPARC
(3x5 in.)
Module
(3x5 in.)