AR-B1474 User¡¦s Guide

3.2.6 PC/104 Connector

(1) 64-Pin PC/104 Connector Bus A & B (CN6)

64

 

 

 

2

 

 

 

 

B

 

 

 

 

A

63

64-Pin PC/104 Connector

1

 

 

 

CN6

 

 

 

1

2

 

 

-IOCHCK ---

A1

B1 ---

GND

 

SD7 ---

A2

B2 ---

RSTDRV

 

SD6 ---

A3

B3 ---

+5 VDC

 

SD5 ---

A4

B4 ---

IRQ9

 

SD4 ---

A5

B5 ---

-5 VDC

 

SD3 ---

A6

B6 ---

DRQ2

 

SD2 ---

A7

B7 ---

-12 VDC

 

SD1 ---

A8

B8 ---

-ZWS

 

SD0 ---

A9

B9 ---

+12 VDC

 

IOCHRDY---

A10

B10 ---

KEY

 

AEN ---

A11

B11 ---

-SMEMW

 

SA19 ---

A12

B12 ---

-SMEMR

 

SA18 ---

A13

B13 ---

-IOW

 

SA17 ---

A14

B14 ---

-IOR

 

SA16 ---

A15

B15 ---

-DACK3

 

SA15 ---

A16

B16 ---

DRQ3

 

SA14 ---

A17

B17 ---

-DACK1

 

SA13 ---

A18

B18 ---

DRQ1

 

SA12 ---

A19

B19 ---

-REFRESH

 

SA11 ---

A20

B20 ---

BUSCLK

 

SA10 ---

A21

B21 ---

IRQ7

 

SA9 ---

A22

B22 ---

IRQ6

 

SA8 ---

A23

B23 ---

IRQ5

 

SA7 ---

A24

B24 ---

IRQ4

 

SA6 ---

A25

B25 ---

IRQ3

 

SA5 ---

A26

B26 ---

-DACK2

 

SA4 ---

A27

B27 ---

TC

 

SA3 ---

A28

B28 ---

BALE

 

SA2 ---

A29

B29 ---

+5 VDC

 

SA1 ---

A30

B30 ---

OSC

 

SA0 ---

A31

B31 ---

GND

 

GND ---

A32

B32 ---

GND

 

Figure 3-9 CN6: 64-Pin PC/104 Connector Bus A & B

(2) 40-Pin PC/104 Connector Bus C & D (CN4)

39

 

1

 

 

C

 

 

D

40

40-Pin PC/104 Connector

2

CN4

 

1

2

 

GND ---

C1

D1 ---

GND

SBHE ---

C2

D2 ---

-MEMCS16

LA23 ---

C3

D3 ---

-IOCS16

LA22 ---

C4

D4 ---

IRQ10

LA21 ---

C5

D5 ---

IRQ11

LA20 ---

C6

D6 ---

IRQ12

LA19 ---

C7

D7 ---

IRQ15

LA18 ---

C8

D8 ---

IRQ14

LA17 ---

C9

D9 ---

-DACK0

-MEMR ---

C10

D10 ---

DRQ0

-MEMW ---

C11

D11 ---

-DACK5

SD8 ---

C12

D12 ---

DRQ5

SD9 ---

C13

D13 ---

-DACK6

SD10 ---

C14

D14 ---

DRQ6

SD11 ---

C15

D15 ---

-DACK7

SD12 ---

C16

D16 ---

DRQ7

SD13 ---

C17

D17 ---

+5 VDC

SD14 ---

C18

D18 ---

-MASTER

SD15 ---

C19

D19 ---

GND

KEY ---

C20

D20 ---

GND

Figure 3-10 CN4: 40-Pin PC/104 Connector Bus C & D

3-5

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Image 23
Sony AR-B1474, DX4, 486DX manual 6 PC/104 Connector, Pin PC/104 Connector Bus a & B CN6, Pin PC/104 Connector Bus C & D CN4

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.