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EIDE HARD DISK PORT
The IRV-3702 SBC contains two PCI Extended Integrated Drive Electronics (EIDE) Ports that directly
interface up to four hard disk drives with embedded controllers. The EIDE Disk Port can be disabled
using the CMOS Setup utility. Refer to Appendix D for the connector location and pin assignments.
AGP/VGA DISPLAY PORT
The IRV-3702 SBC includes a S3 Trio 3D AGP/VGA display controller that interfaces directly to the
local on-board PCI bus. The display port is fully compatible with IBM AGP, VGA, EGA, CGA, and
MDA display adapters, and provides improved performance and additional functionality. The S3 Trio
3D AGP display controller combines an enhanced 128-bit graphics engine, integrated 230 MHz
RAMDAC and programmable dual-clock synthesizer, and an enhanced local peripheral bus/video
interface port for direct interface to live video and MPEG-2 peripherals. The board includes 4M-bytes
of high-speed EDO DRAM and supports video resolutions up to 1600x1200x64K colors. Drivers for
Windows 3.11, Windows NT, Windows 95/98, OS/2, and programming information can be obtained
directly from S3’s Website http://www.s3.com
. Refer to Appendix D for connector location and pin
assignments.
WATCHDOG TIMER
The IRV-3702 SBC includes a WatchDog Timer circuit. The WatchDog Timer ensures that if an
application program gets "lost or bombs", the system will reset or a non-maskable interrupt will be
issued to the CPU. The WatchDog Timer is enabled by reading I/O port 443H. Once enabled, the
WatchDog Timer must be triggered by reading I/O port 443H within the time out period, otherwise
the WatchDog Timer will force a hardware reset or activate the IOCHCK/ line, generating a non-
maskable interrupt (NMI). The WatchDog Timer can be disabled by reading I/O port 43H. A jumper
is provided to select the time out period and to enable the WatchDog Timer circuit. Refer to Appendix
E for the WatchDog Timer configuration jumpers.
OPTIONAL PROMDISK-CHIP DISK EMULATOR
The IRV-3702 includes a socket designed to accept the MCSI PROMDISK-Chip. The PROMDISK-Chip
Disk Emulator is a unique Flash Memory array which emulates a bootable read/write hard disk drive.
The PROMDISK-Chip is offered in 4M, 8M, 16M, and 32M byte capacities and comes complete with
ROM-DOS version 6.22 installed. The PROMDISK-Chip occupies an 8K block of memory space above
640K, whose starting address is selected by jumper JP11. The PROMDISK-Chip uses the Datalight
Flash/FX integrated Flash File System and boot utilities. Refer to Appendix E for the jumper location.
The Flash/FX Variable Block Flash (VBF) File System and ROM-DOS allow the PROMDISK-Chip to
operate as a non-volatile Read/Write disk drive. This means that you can list directories, copy files,
and read and write to the Flash memory on PROMDISK-Chip through standard DOS interrupts and
commands.
HIGH SPEED PCI EXPANSION BUS
The IRV-3702 SBC is equipped with a high speed PCI expansion bus that allows the use of high- speed
I/O controllers such as SVGA, SCSI, Ethernet Network, and Serial Communications adapters. The PCI
expansion bus is compatible with the PICMG (PCI Industrial Computer Manufacturers Group) 2.1
standard and supports up to 4 PCI master peripheral boards.