AR-B1474 User¡¦s Guide

5.2.4 SSD Drive Number (SW1-5 & SW1-6)

The AR-B1474 SSD can simulate one or two disk drives. You can assign the drive letter of the AR-B1474 by configuring SW1-5 & SW1-6.

You can make the computer to boot from SSD by copying DOS into the SSD. If your SSD does not have DOS, the computer will boot from your hard disk or floppy disk. In this condition, the SSD BIOS of AR-B1474 will set the drive letter of the SSD to the desired drive letter automatically.

The AR-B1474 would simulate a single disk drive when only (FLASH) EPROM or SRAM (starting from MEM1 socket) is installed. The drive numbers with respect to the switch setting when the AR-B1474 simulates single disk drives.

SW1-5

SW1-6

Occupies floppy disk number (SSD)

OFF (*)

OFF

0 or 1 (Note 1)

ON

OFF

0 or 2 (Note 2)

OFF

ON

0

ON

ON

0

Table 5-3 SSD Drive Number

NOTE: 1. If there is no DOS on this SSD, the disk number will 1 (B:). If any DOS is found by the AR-B1474 SSD BIOS, the disk number will be 0 (A:) But, you can change the disk number from 0 to 1 by pressing the <ESC> key during system bootup.

2.If there is no DOS on this SSD, the disk number will be 2 (C: or D: or … ). If any DOS is found by the AR- B1474 SSD BIOS, the disk number will be 0 (A:). But, you can change the disk number from 0 to 2 by pressing the <ESC> key during system bootup.

(1)Simulate 2 Disk Drive

When (FLASH) EPROM and SRAM are both used on the AR-B1474, or you only have installed SRAM that does not start from MEM1 socket, the AR-B1474 will simulate two disk drives. The drive numbers respect to those switch settings when AR-B1474 simulates two disk drives.

SW1-5

SW1-6

Occupies floppy disk number

FLASH (EPROM)

SRAM

OFF

OFF

0 or 1 (Note 1)

2

ON

OFF

0 or 2 (Note 2)

3

OFF

ON

0

1

ON

ON

0

2

Table 5-4 SSD Drive Number for Simulate 2 Disk Drive

NOTE: 1. If there is no DOS on this SSD, the disk number will be 1 (B:). If any DOS is found by the AR-B1474 SSD BIOS, the disk letter will be 0 (A:). But, you can change the disk number from 0 to 1 by pressing the <ESC> key during system bootup.

2.If there is no DOS on this SSD, the disk number will be 2 (C: or D: or … .). If any DOS is found by the AR-B1474 SSD BIOS, the disk number will be 0 (A:). But, you can change the disk number from 0 to 2 by pressing the <ESC> key during system bootup.

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Sony AR-B1474, DX4, 486DX manual SSD Drive Number SW1-5 & SW1-6, Simulate 2 Disk Drive, Flash Eprom Sram

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.