User manual

Yukon HX Motherboard User Manual
1
Memory
The Yukon HX motherboard supports base (conventional) and extended memory.
Operating systems such as MS-DOS
†
, OS/2
†
, UNIX
†
, and all application programs use
base memory. For better performance, OS/2 and UNIX as well as many MS-DOS
applications use extended memory.
The motherboard supports up to 128 MB of DRAM memory. DRAM is implemented
through 72-pin single in-line memory modules (SIMMs). The motherboard contains four
SIMM sockets.
Cache Memory
The Pentium microprocessor includes 16 KB of cache on the chip. The 82430HX
PCIset includes a cache controller that supports direct-mapped cache memory and
supports a second level cache that uses up to 512 KB of Synchronous Pipeline Burst
SRAM.
IDE Peripheral Interface
The motherboard provides a high speed, 32-bit PCI/IDE interface. The PCI/IDE
interface supports:
• Up to four PCI/IDE devices.
• Supports PIO Mode 0 to Mode 4.
• Logical block addressing (LBA) of hard drives larger than 528 MB.
• Extended Cylinder Head Sector (ECHS) translation modes.
• ATAPI devices (such as CD-ROMs) on both IDE interfaces.
Super I/O
The Plug and Play Super I/O has the following logical devices: One high performance
2.88MB floppy disk controller with digital data separator. One multi-mode high
performance bi-directional Parallel Port. Two 16C550 compatible enhanced UARTs.
These logical devices can be enabled or disabled individually by BIOS setting. The
Super I/O uses power saving circuitry to control power consumption. Each time a
logical device is disabled, its input gate is inhibited, output is tristated and input clock is
disabled. The net result is high performance and low power consumption.
• Plug and Play, Version 1.0a compatible to meet Win 95 logo requirement
 Built-in Resource Data ROM
 16-bit address decoding
• 2.88MB floppy disk controller