Features 2–1
2
Features
Table 2–1 provides an overview of the AlphaPC 164SX motherboard’s features.
Table 2–1 AlphaPC 164SX Features
Feature Description
Microprocessor Alpha 21164PC 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 16KB, direct-mapped, instruction cache on the CPU chip
L1 Dcache 8KB, direct-mapped, data cache on the CPU chip
L2 backup cache Onboard 1MB, 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
• Cypress CY82C693U–NC chip with a PCI-to-ISA bridge,
PCI EIDE, keyboard, mouse, and time-of-year clock
• Two dedicated ISA expansion slots
• SMC FDC37C669 combination controller chip provides
control for diskettes, two UARTs with modem control, and
parallel port
• 1MB flash ROM
Firmware Alpha SRM Console firmware
