Specifications

9 March 1999 – Subject To Change Introduction 1–5
Software Support
– The 21174 core logic chip provides the SDRAM and PCI clocks.
– A 14.318-MHz crystal and frequency generator provide a clock source for
the FDC37C935 ISA device controller. The controller’s onchip generator
then provides other clocks as needed.
– A 32-kHz crystal provides the TOY clock source.
• Serial ROM – A Xilinx XC17128 serial ROM (SROM) contains initial code that
is loaded into the 21164 instruction cache (Icache) on power-up. A serial line
interface is also provided to allow direct connection to a terminal line for debug-
ging purposes.
• Two AMD MACH210-15 programmable logic devices (PLDs) for interrupts and
PCI bus arbitration.
• Altera EPM7032-7 for DMA boundary issue.
1.2 Software Support
The support elements described in this section are either included with the
AlphaPC 164LX or are available separately.
1.2.1 AlphaBIOS Windows NT Firmware
The AlphaPC 164LX motherboard ships with AlphaBIOS firmware and online docu-
mentation that describes how to configure the firmware for Windows NT. This firmware
initializes the system and enables you to install and boot the Windows NT operating
system. The AlphaBIOS firmware resides in the flash ROM on the 21A04-C0 variation
of the AlphaPC 164LX motherboard. Binary images of the AlphaBIOS firmware are
included in the motherboard Software Developer’s Kit (SDK), along with a license
describing the terms for use and distribution.
1.2.2 Alpha SRM Console Firmware
The Alpha SRM Console firmware is required to install and boot Tru64 UNIX on the
AlphaPC 164LX. This firmware comes factory installed in the 21A04-C1 variation
of the AlphaPC 164LX. When installed, this firmware occupies the flash blocks
reserved for the primary firmware. Binary images of the Alpha SRM Console firm-
ware are included in the SDK and Firmware Update compact disk, along with a
license describing the terms for use and distribution.