IBM SAGP-845EV User Manual

Chapter 1 Introduction

SAGP-845EV is a PSB form factor board to work with a high performance

processor. It is equipped with advanced multi-mode I/O, and designed for

system manufacturers, integrators, or VARs who want to provide reliable and

quality performance at a reasonable price.

In addition, SAGP-845EV’s onboard Intel 845G MGCH chip features built-in AGP4X

capability which provides 3D graphics of up to 2048x1536x16-bit-color resolution.

The onboard VGA shares 8MB system DDR-SDRAM.

An advanced high performance super AT I/O chip – ITE IT8712 is used in the

SAGP-845EV board. Both on-chip UARTs are compatible with the NS16C550. The

parallel port and IDE interface are compatible with IBM PC/AT architecture.

SAGP-845EV’s built-in ICH4 has 10/100 Fast Ethernet LAN capability. It’s fully

integrated 10BASE-T/100BASE-TX LAN solution with high performance networking

functions and low power features.

SAGP-845EV uses the advanced Intel 845G Chipsets that is a 100% software-

compatible chipset with PCI 2.2 standard.

This PIAGP CPU card must be installed on IEI PCIAGP/PXAGP series backplanes.

If onboard ISA interface is required, please be sure to install PISA-KIT01

daughter board on the specific socket on the backplane before ISA cards are

installed to make sure the system works properly.

1.1 Specifications

CPU (PGA 478)

Intel Pentium 4/4-M Processor, supports 400/533

MHz FSB

Bus interface

PCIAGP golden finger, but only AGP/PCI signal is

provided

Bus speed

PCI: 33MHz

DMA channels

Interrupt levels

Chipset

INTEL 845G/GE/82801DB (ICH4)

Real-time clock

INTEL 82801DB (ICH4)

System memory

Two 184-pin DIMM sockets support DDR

200/266/333(845GE) SDRAM up to 1GB.

ATA/100

IDE interface

− Up to four PCI Enhanced IDE hard drives

− Can handle data transfer up to 100Mbps

− Backward-compatible with existing ATA-2 IDE

specifications so there is no need to do any

changes to users’ current peripherals

Floppy disk drive interface

Supports up to two floppy disk drives, 5.25” (360KB

and 1.2MB) and/or 3.5” (720KB, 1.44MB, and

2.88MB)

Serial ports

− COM1 (RS-232) & COM2 (RS-232) with 16C550

UART (or compatible) with 16-byte FIFO buffer

− Data transfer up to 115.2Kbps

− Each port can be individually configured to be

COM1, COM2 or disabled