IBM 170 manual Architecture and Technical Information, System Upgrade, Processor and Cache

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.

Processor Card

4 MB L2

POWER3-II

400 MHz

32 Bytes

@ 200 MHz

Addr/Cntl	6xx Data Bus 16 Bytes @ 100 MHz
	6xx Address Bus 100 MHz
Memory	Data
Address
	Memory Data Bus 16 Bytes @ 100 Mhz

System Planar

System

Clock

			Arbiter
Memory Modules
256 MB -2 GB Total		Boot			PCI Bridge
		ROM	ISA Bridge
Integrated Service	SP
Processor
	Interface
Audio	Super	10/100	Ultra-SCSI
	I/O
		Ethernet
			External	Internal	S6	S5	S4	S3
			Ultra2	Ultra

PCI Bridge

2 PCI Slots

64-bit

50MHz 3.3v

4 PCI Slots

32-bit

33MHz 5.0v

S2 S1

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.

RS/6000 7044 Model 170 Technical Overview 3