SE440BX-2 Motherboard Product Guide
11
Second Level Cache Memory
The second level cache for the Pentium II processor includes synchronous pipelined burst static
RAM (PBSRAM) and tag RAM. There are four PBSRAM components totaling 512 KB in size.
All supported onboard memory is cacheable.
The Celeron processors that include an integrated 128 KB second level cache subsystem, have it
implemented on the processor die. All supported onboard memory can be cached.
PCI Enhanced IDE Interface
The PCI enhanced IDE interface handles the exchange of information between the processor and
peripheral devices like hard disks and add-in boards inside the computer. The interface supports:
• Up to four IDE devices (such as hard drives)
• ATAPI devices (such as CD-ROM drives)
• PIO Mode 3 and PIO Mode 4 devices
• Ultra DMA/33
• Logical block addressing (LBA) of hard drives larger than 528 MB and extended cylinder head
sector (ECHS) translation modes
• Support for laser servo (LS-120) drives
Input/Output (I/O) Controller
The I/O controller handles the exchange of information between the processor and external devices
like the mouse and keyboard or a printer that are connected to the computer. The controller
features the following:
• Integrated keyboard and mouse controller
• Industry standard diskette drive controller
• One multimode bi-directional parallel port
Standard mode: Centronics-compatible operation
High speed mode: support for Extended Capabilities Port (ECP) and Enhanced Parallel
Port (EPP)
• Two serial ports
• Flexible IRQ and DMA mapping for Windows
†
95 and Windows 98
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