1-28 System Overview
SCSI Controller
The PCI board includes an embedded QLogic ISP12160A SCSI dual channel controller
for supporting the hard disk drives in the storage bays. It is a 64-bit direct memory
access (DMA) bus master and a 64-bit PCI bus at 33 MHz. This SCSI controller
interfaces the PCI bus to two Ultra 160 SCSI buses. The SCSI controller is fully
autonomous and capable of managing multiple I/O operations and data transfers
without host intervention.
Video Controller
The system has an integrated Intel CT69000 HiQVideo Accelerator highly integrated
graphics controller that supports the following:
! BIOS compatibility with 1/4VGA, VGA, SVGA, XGA, and SXGA
! 2 MB of onboard synchronous DRAM (SDRAM) embedded memory
! Superb 2D video performance
! Analog VGA monitors (single and multiple frequency, interlaced and
noninterlaced) with a maximum vertical retrace noninterlaced frequency of
100 Hz.
Peripheral Controller
The Super I/O integrated peripheral controller supports two enhanced serial ports
(UARTs) and an integrated Real Time Clock (RTC) module. The I/O panel board
provides the connector interface for each serial port.
Serial Ports
The serial ports (UART1 and UART 2) provide data rates up to 1.5 Mbaud and 13 IRQ
channel options. When disabled, serial port interrupts are available to add-in boards.
Real Time Clock
The real-time clock (RTC), which is located in the PCI module on the PCI board,
provides system clock/calendar information stored in a non-volatile memory
(NVRAM). The real-time clock battery provides power backup for the real-time clock.
See Figure 1-10.
The RTC battery may need to be replaced because of its battery life span. The battery
powers the clock in the absence of power. When the battery starts to weaken, it loses
voltage, and the system settings stored in CMOS RAM (for example, the date and time)
may be wrong.
The RTC battery (Vendor Part No. CR2032) is available through many vendors.
Contact your sales representative or dealer for a list of approved devices.