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AR-B1474 User¡¦s Guide
1-1
1. OVERVIEW
This chapter provides an overview of your system features and capabilities. The following topics are covered:
l Introduction
l Packing List
l Features
1.1 INTRODUCTION
The AR-B1474 is a half size industrial grade CPU card that has been designed to withstand continuous operation
in harsh environments. The total on-board memory for the AR-B1474 can be configured from 1MB to 32MB by
using all 72-pin type DRAM devices.
The 8 layers PCB CPU card is equipped with a IDE HDD interface, a floppy disk drive adapter, 1 parallel port, 2
serial ports, a watchdog timer and a solid state disk. Its dimensions are as compact as 122mm x 185mm. It’ s
highly condensed features make it an ideal cost/performance solution for high-end commercial and industrial
applications where CPU speed and mean time between failure is critical.
The AR-B1474 provides 2 bus interfaces, ISA bus and PC/104 compatible expansion bus. Based on the PC/104
expansion bus, you could easy install thousands of PC/104 module from hundreds venders around the world. You
could also directly connect the power supply to the AR-B1474 on-board power connector in stand alone
applications.
A watchdog timer, which has a software programmable time-out interval, is also provided on this CPU card. It
ensures that the system will not hang-up if a program can not execute normally.
For diskless application, the AR-B1474 provides up to 3MB of bootable ROM, FLASH, or SRAM disk space by
using 64K x 8 to 1M x 8 memory chips.
The AR-B1474 is implemented with M1429 and M1431 chipset incorporate a memory controller, parity generation
and checking, two 8237 DMA controllers, two 8259 interrupt controllers, one 8254 timer/counter, an address buffer
and a data buffer.
A super I/O chip (SMC37C669) is embedded in the AR-B1474 card. It combines functions of a floppy disk drive
adapter, a hard disk drive (IDE) adapter, two serial (with 16C550 UART) adapters and 1 parallel adapter.
The I/O port configurations can be done by setting the BIOS setup program.
As an UART, the chip supports serial to parallel conversion on data characters received from a peripheral device
or a MODEM , and parallel to serial conversion on data character received from the CPU. The UART includes a
programmable baud rate generator, complete MODEM control capability and a processor interrupt system. As a
parallel port, the SMC37C669 provides the user with a fully bi-directional parallel centronics-type printer interface.
This manual has been written to assist you in installing, configuring and running the AR-B1474 CPU card. Each
section is intended to guide you through it’ s procedures clearly and concisely, allowing you to continue to the next
chapters without any difficulty.