
C.1.14.5 SCSI ID Selection
The motherboard host adapter is assigned the SCSI identification of 7 for both ports. The two internal drives attached to the
C.1.15 ASICs
The system unit achieves a high level of integration through
■K9+
■Marvin
■
■
■Frame buffer controller (FBC)
■Reset, interrupt, scan, and clock (RISC)
Also included in this section are brief discussions of the SuperIO component.
C.1.15.1 K9+
The K9+ ASIC is a buffered memory crossbar device that acts as the bridge between the six system unit buses. The six system unit buses include two processor buses (144 bits wide), a memory data bus (two busses, each 288 bits wide), a graphics bus, and two I/O buses. The chip is
The K9+ ASIC provides the following:
Note
■
■Decoupled memory port; loading and unloading of memory data can take place in parallel with other operations
■Burst transfers operate on a doubleword of data per slice
■A total of eight
■
Appendix C Functional Description