Compaq user manual AlphaPC 164SX Features

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Features

Table 2–1provides 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	32MB to 512MB memory array -- Two banks of 128-bit memory;
(SDRAM) 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	• 32-bit and 64-bit, 33-MHz PCI
support	• 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

Features 2–1