User`s manual

Features of the AlphaPC 164LX Motherboard 2–1

Features of the AlphaPC 164LX Motherboard

Table 2–1 provides an overview of the AlphaPC 164LX motherboard’s features.

Figure 2–1 shows the AlphaPC 164LX motherboard and its components.

Table 2–1 AlphaPC 164LX Features

Feature Description

Microprocessor Alpha 21164 microprocessor (64-bit RISC)

Core logic chip 21174 core logic chip, comprising a single control chip that pro-

vides an interface to system memory and the PCI bus

Synchronous DRAM (SDRAM)

memory

32MB to 512MB memory array –- Two banks of 128-bit memory;

168-pin unbuffered SDRAM DIMMs

Caching:

L1 Icache 8KB, direct-mapped instruction cache on the CPU chip

L1 Dcache 8KB, direct-mapped data cache on the CPU chip

L2 Scache 96KB, three-way, set-associative, write-back unified instruction

and data cache on the CPU chip

L3 backup cache Onboard 2MB, direct-mapped, synchronous SSRAM backup

cache with 128-bit data path

I/O and miscellaneous support 32-bit and 64-bit, 33-MHz PCI

Two 64-bit and two 32-bit PCI expansion slots

PCI/IDE control (CMD PCI0646)

Intel 82378ZB PCI-to-ISA bridge chip

Two dedicated ISA expansion slots

SMC FDC37C935 combination controller chip provides control

for diskettes, two UARTs with modem control, parallel port, key-

board, mouse, and time-of-year clock

1MB flash ROM

Firmware Windows NT AlphaBIOS firmware