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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 7
Interrupt levels 15
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