AR-B1474 User¡¦s Guide

 

7. SPECIFICATIONS

CPU:

25-100 MHz INTEL/AMD/CYRIX 80486DX/DX2/DX4

Bus Interface:

ISA (PC-AT) Bus and PC/104 Bus

Chipset:

ALI M1429 and M1431

RAM Memory:

1MB to 32MB using 32-bit or 36-bit 72-pin SIMMs with access time of 70ns or less

Shadow RAM:

Up to 256KB in 32 KB blocks supports system and video BIOS

Extended Memory

Fully supports the LIM EMS 4.0 and 3.2 specifications

Mapping:

 

Co-Processor:

Supported by all CPUs

BIOS:

Legal AMI system BIOS

IDE HDD Interface:

Supports up to two IDE type hard disk drives (software enable/disable)

Floppy Disk Drive:

Supports up to two 5.25 (360KB & 1.2MB) or 3.5 (720KB & 1.44MB) floppy disk drives

 

(software enable/disable)

Parallel Port:

One Centronic parallel port configurable to LPT1, LPT2, LPT3, or disable.

Serial Port:

Two RS-232C serial port (with 16byte FIFOs, 16C550 compatible) configures as COM1,

 

COM2, COM3, COM4 or disable

Real-Time

DS12887 or compatible chip

Clock/Calendar:

 

Watchdog Timer:

Programmable time-out interval from 6 to 42 seconds. The activity can be Reset System or

 

Generate IRQ 15 Signal

Solid State Disk:

Up to 3MB bootable solid state disk, it accepts 128Kx8 to 1Mx8 EPROM, 128Kx8 to 512Kx8

 

SRAM, and 64Kx8 to 512Kx8 5V FLASH

Speaker:

Build-in buzzer

DMA Channels:

7 DMA channels

Interrupt Levels:

15 vectored interrupt levels

Keyboard Port:

PS/2 compatible 6-pin mini DIN connector, adapter cable for PC/AT is included

Bus Speed:

Programmable 1/4, 1/5, 1/6, 1/8, 1/10, or 1/12 input clock and 7.159MHz

PCB:

8 layers for noise reduction

System

Landmark speed V2.0: 359MHz (INTEL 80486DX4-100)

Performance:

 

Power Supply:

Only +5V DC +/-% Power requirements: +5V@ 1.5A maximum

Stand Alone

Provides external power connector and 4 fixed holes for stand-alone operation

Operation:

 

Operating

0 to 60 degree C (140 degree F)

Temperature:

 

Storage

-25 to 85 degree C

Temperature:

 

Humidity:

0 to 95% (non-condensing)

Dimensions:

Half size, 12.2cm x 18.5cm (4.80” x 7.29” )

Weight:

280g (without CPU, DRAM SIMM, ROM and RAM chips)

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Sony 486DX, DX4, AR-B1474 manual Specifications, Cpu, Bios, Pcb

DX4, AR-B1474, 486DX specifications

The Sony 486DX, AR-B1474, and DX4 are notable examples of advanced computing technologies from the early to mid-1990s, a time when personal computers were rapidly evolving to meet increasing user demands. These systems played a pivotal role in shaping the landscape of modern computing.

The Sony 486DX is built around the popular Intel 80486 microprocessor, which was a significant step up from its predecessor, the 386. The 486DX featured a 32-bit architecture and introduced integrated cache memory, which greatly enhanced data processing speeds and overall system performance. Operating at clock speeds typically ranging from 25 to 100 MHz, the 486DX models provided a solid foundation for running more sophisticated software applications and advanced games of the era.

Accompanying the 486DX was the AR-B1474 motherboard, designed to maximize the potential of the 486 architecture. This motherboard featured support for up to 512 KB of level 2 cache memory, further boosting performance for data-heavy tasks. The AR-B1474 also included extensive connectivity options, with ISA slots for legacy devices, as well as support for EISA, making it compatible with a wide range of hardware peripherals. This versatility made the AR-B1474 a popular choice among builders of custom desktop PCs during its time.

The DX4, another significant milestone, built upon the 486 architecture by introducing a clock-doubling technique. By effectively allowing the processor to perform operations at up to three times its base clock speed (typically 75 or 100 MHz), the DX4 could handle even more demanding applications, thereby providing users with significant performance improvements without requiring a complete overhaul of their systems.

Both the 486DX and DX4 processors facilitated advancements in multimedia capabilities, with improved graphics rendering and audio performance that supported CD-ROMs and early gaming technologies. This made them particularly appealing to consumers looking for a versatile machine for both work and entertainment.

Overall, the combination of the Sony 486DX, AR-B1474 motherboard, and DX4 processor exemplifies a significant chapter in computing history, showcasing how hardware advancements seamlessly integrated with user needs for performance and flexibility. As these technologies laid the groundwork for future innovations, they remain noteworthy for their contributions to the evolution of personal computing.