IBM 170 - Manual (Page 5)

RS/6000 7044 Model 170 Technical Overview 3
System Upgrade
There are no system model upgrade conversions available for the 44P Model
170. Processor and memory expansion options are available for this system. The
Model 170 is designed for customer setup of the machine and for the subsequent
addition of most features (adapters and devices).
Architecture and Technical Information
A diagram of the system architecture and logic flow for a 400 MHz system is
shown in Figure 2. The 333 MHz system differences and a general discussion of
this diagram is provided in the following sections.
Figure 2. Model 170 - System Logic Flow Diagram
Processor and Cache
The 44P Model 170 is the most affordable 64-bit system that IBM has introduced
and uses the POWER3-II processor. The POWER3-II processor is designed for
high-performance commercial and graphical computing applications. The
processor allows for concurrent operation of up to eight instructions per cycle
(three fixed-point instructions, two floating point instructions, two load/store
instructions, and one branch instruction). Increasing the number of
simultaneously executed instructions results in better system performance
especially with applications that are optimized to take advantage of this
capability.
Figure 3 is a diagram of the functional components of this processor, shown
attached to the cache and bus configuration of a 400 MHz Model 170.
Integrated Service
Processor
PCI Bridge
PCI Bridge
Ultra-SCSI
Internal
Ultra
10/100
Ethernet Audio
Super
I/O
4 PCI Slots
32-bit
33 MHz
5.0v
2 PCI Slots
64-bit
50 MHz
3.3v
System Planar
Data
Addr/Cntl
Memory Data Bus 16 Bytes @ 100 Mhz
Memory
Address
6xx Data Bus 16 Bytes @ 100 MHz
6xx Address Bus 100 MHz
Memory Modules
256 MB -2 GB Total
Processor Card
POWER3-II
400 MHz
32 Bytes
@ 200 MHz
4 MB L2
S2 S1
System
Clock
S6 S5 S4 S3
ISA Bridge
External
Ultra2
SP
Interface
Boot
ROM
Arbiter