Sony 486DX, DX4, AR-B1474 manual ISA Bus Pin Assignment

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AR-B1474 User¡¦s Guide

2.3.4 ISA Bus Pin Assignment

I/O Pin

Signal Name

Input/Output

I/O Pin

Signal Name

Input/Output

A1

-IOCHCK

Input

B1

GND

Ground

A2

SD7

Input/Output

B2

RSTDRV

Output

A3

SD6

Input/Output

B3

+5V

Power

A4

SD5

Input/Output

B4

IRQ9

Input

A5

SD4

Input/Output

B5

-5V

Power

A6

SD3

Input/Output

B6

DRQ2

Input

A7

SD2

Input/Output

B7

-12V

Power

A8

SD1

Input/Output

B8

-ZWS

Input

A9

SD0

Input/Output

B9

+12V

Power

A10

IOCHRDY

Input

B10

GND

Ground

A11

AEN

Output

B11

-SMEMW

Output

A12

SA19

Input/Output

B12

-SMEMR

Output

A13

SA18

Input/Output

B13

-IOW

Input/Output

A14

SA17

Input/Output

B14

-IOR

Input/Output

A15

SA16

Input/Output

B15

-DACK3

Output

A16

SA15

Input/Output

B16

DRQ3

Input

A17

SA14

Input/Output

B17

-DACK1

Output

A18

SA13

Input/Output

B18

DRQ1

Input

A19

SA12

Input/Output

B19

-REFRESH

Input/Output

A20

SA11

Input/Output

B20

BUSCLK

Output

A21

SA10

Input/Output

B21

IRQ7

Input

A22

SA9

Input/Output

B22

IRQ6

Input

A23

SA8

Input/Output

B23

IRQ5

Input

A24

SA7

Input/Output

B24

IRQ4

Input

A25

SA6

Input/Output

B25

IRQ3

Input

A26

SA5

Input/Output

B26

-DACK2

Output

A27

SA4

Input/Output

B27

TC

Output

A28

SA3

Input/Output

B28

BALE

Output

A29

SA2

Input/Output

B29

+5V

Power

A30

SA1

Input/Output

B30

OSC

Output

A31

SA0

Input/Output

B31

GND

Ground

Table 2-4 ISA Bus Pin Assignment

 

 

I/O Pin

Signal Name

Input/Output

I/O Pin

Signal Name

Input/Output

C1

SBHE

Input/Output

D1

-MEMCS16

Input

C2

LA23

Input/Output

D2

-IOCS16

Input

C3

LA22

Input/Output

D3

IRQ10

Input

C4

LA21

Input/Output

D4

IRQ11

Input

C5

LA20

Input/Output

D5

IRQ12

Input

C6

LA19

Input/Output

D6

IRQ15

Input

C7

LA18

Input/Output

D7

IRQ14

Input

C8

LA17

Input/Output

D8

-DACK0

Output

C9

-MEMR

Input/Output

D9

DRQ0

Input

C10

-MEMW

Input/Output

D10

-DACK5

Output

C11

SD8

Input/Output

D11

DRQ5

Input

C12

SD9

Input/Output

D12

-DACK6

Output

C13

SD10

Input/Output

D13

DRQ6

Input

C14

SD11

Input/Output

D14

-DACK7

Output

C15

SD12

Input/Output

D15

DRQ7

Input

C16

SD13

Input/Output

D16

+5V

Power

C17

SD14

Input/Output

D17

-MASTER

Input

C18

SD15

Input/Output

D18

GND

Ground

Table 2-5 ISA Bus Pin Assignment

2-5

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Contents Industrial Grade 486DX/DX2/DX4 CPU Card Page Table of Contents Specifications Placement & Dimensions Bios ConsoleMemory Banks & Programming RS-485 SSD Types Supported & IndexPreface Organization Static Electricity PrecautionsIntroduction OverviewPacking List FeaturesDMA Controller System ControllerKeyboard Controller DMA ControllerInterrupt Controller Interrupt ControllerHex Range Device 1 I/O Port Address MapI/O Port Address Map Real-Time Clock and Non-Volatile RAM TimerAddress Description Real-Time Clock & Non-Volatile RAMISA Bus Pin Assignment ISA Bus Pin AssignmentName Description ISA Bus Signal DescriptionReceiver Buffer Register RBR Serial PortTransmitter Holding Register THR DlabInterrupt Identification Register IIR Interrupt Enable Register IERLine Control Register LCR Modem Control Register MCRModem Status Register MSR Parallel PortDivisor Latch LS, MS Register AddressPrinter Status Buffer Data SwapperPrinter Control Latch & Printer Control Swapper Overview Setting UP the SystemRS-232 Connector DB1 & DB2 System SettingSerial Port RS-485 Adapter Select JP3 & JP11Power Connector J5 Hard Disk IDE Connector CN1HDD Pin Assignment Parallel Port Connector CN3 FDD Port Connector CN2CN3 Pin PC/104 Connector Bus a & B CN6 6 PC/104 ConnectorPin PC/104 Connector Bus C & D CN4 IRQ 3-7, 9-12, 14 PC/104 ISA Bus Signal DescriptionAMD DX2-80 CPU Select JP1 CPU SettingCPU Voltage Select JP2 AMD 4X CPU 5x86 Select JP15CPU Clock Select JP6 & JP9 CPU Clock SettingDram Configuration Memory SettingCache RAM Size Select JP8 SIMM1LED Header J1, J2 & J4 Keyboard ConnectorBattery Setting Reset Header J7External Speaker Header J3 CRT Display Type Select JP13Page Installation PGM1474.EXE Utility DisketteWP1474.EXE WD1474.EXEBU1474.EXE Help to PGF File Display Error in PGF FileDisable the Software Write Protect Enable the Software Write ProtectWrite Protect Function Hardware Write ProtectWatchdog Timer Setting Watchdog TimerTime-Out Setting Time Factor Time-Out Period SecondsWatchdog Timer Trigger Watchdog Timer EnabledWatchdog Timer Disabled Page Solid State Disk Switch Setting2 I/O Port Address Select SW1-1 & SW1-2 OverviewSSD Firmware Address Select SW1-3 & SW1-4 DEVICE=C\DOS\EMM386.EXE X=C800-CFFFSimulate 2 Disk Drive SSD Drive Number SW1-5 & SW1-6Flash Eprom Sram Disk Drive Name Arrangement ROM Type Select SW1-7 & SW1-8SSD Bios Select JP7 Jumper SettingROM Disk Installation SSD Memory Type Setting M1 ~ M3 & JP5Switch and Jumper Setting UV Eprom 27CxxxSoftware Programming UV Eprom 27CXXX Switch SettingLarge Page 5V Flash Disk 5V Large Flash 29FXXX Switch SettingSmall Page 5V Flash ROM Disk 5V Flash 29CXXX & 28EEXXX Switch SettingTyping DOS Command Using Tool ProgramRAM Disk Jumper SettingHardware Setting Installation D.O.CSSD Bios Setting JP7 Combination of ROM and RAM DiskO.C. Setting SW1-8 Software SettingPage Bios Setup Overview Bios ConsoleDate & Time Setup Standard Cmos SetupFloppy Setup Hard Disk SetupAdvanced Cmos Setup IDE LBA Mode IDE Block Mode TransferInternal Cache Memory ShadowAdvanced Chipset Setup Power Management Password Checking Setting PasswordAuto Configuration with Optimal Setting Auto Configuration with Fail Safe SettingSave Settings and Exit Bios ExitExit Without Saving Bios SpecificationsCPU PCBPage Placement Placement & DimensionsDimensions Memory Banks & Programming RS-485 Using Memory BankCS1 CS0 SocketInitialize COM port Programming RS-485Send out one character Transmit Send out one character to COM1 Receive dataPage SSD Types Supported SSD Types Supported & Index10-2 Name Function Index

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.