Sony AR-B1474, DX4, 486DX manual System Setting, Serial Port, RS-485 Adapter Select JP3 & JP11

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AR-B1474 User¡¦s Guide

3.2 SYSTEM SETTING

Jumper pins allow you to set specific system parameters. Set them by changing the pin location of jumper blocks. (A jumper block is a small plastic-encased conductor that slips over the pins.) To change a jumper setting, remove the jumper from its current location with your fingers or small needle-nosed pliers. Place the jumper over the two pins designated for the desired setting. Press the jumper evenly onto the pins. Be careful not to bend the pins.

We will show the locations of the AR-B1474 jumper pins, and the factory-default setting.

CAUTION: Do not touch any electronic component unless you are safely grounded. Wear a grounded wrist strap or touch an exposed metal part of the system unit chassis. The static discharges from your fingers can permanently damage electronic components.

3.2.1 Serial Port

(1) RS-485 Adapter Select (JP3 & JP11)

JP3 and JP11 can be set independently. JP3 selects COM-A port and JP11 selects COM-B port.

1

2

3

JP3 -- COM-A

1

2

3

Reserved for Acrosser's

RS-232C

RS-485 adapter used only

(Factory Preset)

Figure 3-2 JP3: RS-485 Adapter Select for COM-A

JP11 -- COM-B

1

2

3

1

2

3

Reserved for Acrosser's

RS-232C

RS-485 adapter used only

(Factory Preset)

Figure 3-3 JP11: RS-485 Adapter Select —COM-B

(2) RS-232 Connector (DB1 & DB2)

There are two serial ports with EIA RS-232C interface on the AR-B1474. COM-A and COM-B use two on-board D- type 9-pin male connectors (DB1 & DB2). If you want to configure the serial port, please refer to the BIOS configuration.

DB1 (COM A)

DB2 (COM B)

GND 5

GND 5

9-RI

9-RI

-DTR 4

-DTR 4

8-CTS

8-CTS

TXD 3

TXD 3

7-RTS

7-RTS

RXD 2

RXD 2

6-DSR

6-DSR

-DCD 1

-DCD 1

Figure 3-4 DB1 & DB2: RS-232 Connector

3-2

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Contents Industrial Grade 486DX/DX2/DX4 CPU Card Page Table of Contents Bios Console Specifications Placement & DimensionsMemory Banks & Programming RS-485 SSD Types Supported & IndexPreface Static Electricity Precautions OrganizationOverview IntroductionFeatures Packing ListSystem Controller DMA ControllerKeyboard Controller DMA ControllerInterrupt Controller Interrupt ControllerI/O Port Address Map 1 I/O Port Address MapHex Range Device Timer Real-Time Clock and Non-Volatile RAMAddress Description Real-Time Clock & Non-Volatile RAMISA Bus Pin Assignment ISA Bus Pin AssignmentISA Bus Signal Description Name DescriptionSerial Port Receiver Buffer Register RBRTransmitter Holding Register THR DlabInterrupt Enable Register IER Interrupt Identification Register IIRLine Control Register LCR Modem Control Register MCRParallel Port Modem Status Register MSRDivisor Latch LS, MS Register AddressPrinter Control Latch & Printer Control Swapper Data SwapperPrinter Status Buffer Setting UP the System OverviewSystem Setting RS-232 Connector DB1 & DB2Serial Port RS-485 Adapter Select JP3 & JP11HDD Pin Assignment Hard Disk IDE Connector CN1Power Connector J5 CN3 FDD Port Connector CN2Parallel Port Connector CN3 Pin PC/104 Connector Bus C & D CN4 6 PC/104 ConnectorPin PC/104 Connector Bus a & B CN6 PC/104 ISA Bus Signal Description IRQ 3-7, 9-12, 14CPU Setting AMD DX2-80 CPU Select JP1CPU Voltage Select JP2 AMD 4X CPU 5x86 Select JP15CPU Clock Setting CPU Clock Select JP6 & JP9Memory Setting Dram ConfigurationCache RAM Size Select JP8 SIMM1Keyboard Connector LED Header J1, J2 & J4Reset Header J7 Battery SettingExternal Speaker Header J3 CRT Display Type Select JP13Page Installation Utility Diskette PGM1474.EXEBU1474.EXE WD1474.EXEWP1474.EXE Display Error in PGF File Help to PGF FileEnable the Software Write Protect Disable the Software Write ProtectWrite Protect Function Hardware Write ProtectWatchdog Timer Watchdog Timer SettingTime-Out Setting Time Factor Time-Out Period SecondsWatchdog Timer Disabled Watchdog Timer EnabledWatchdog Timer Trigger Page Switch Setting Solid State DiskOverview 2 I/O Port Address Select SW1-1 & SW1-2SSD Firmware Address Select SW1-3 & SW1-4 DEVICE=C\DOS\EMM386.EXE X=C800-CFFFFlash Eprom Sram SSD Drive Number SW1-5 & SW1-6Simulate 2 Disk Drive ROM Type Select SW1-7 & SW1-8 Disk Drive Name ArrangementJumper Setting SSD Bios Select JP7SSD Memory Type Setting M1 ~ M3 & JP5 ROM Disk InstallationSwitch and Jumper Setting UV Eprom 27CxxxUV Eprom 27CXXX Switch Setting Software Programming5V Large Flash 29FXXX Switch Setting Large Page 5V Flash Disk5V Flash 29CXXX & 28EEXXX Switch Setting Small Page 5V Flash ROM DiskUsing Tool Program Typing DOS CommandJumper Setting RAM DiskInstallation D.O.C Hardware SettingSSD Bios Setting JP7 Combination of ROM and RAM DiskSoftware Setting O.C. Setting SW1-8Page Bios Console Bios Setup OverviewStandard Cmos Setup Date & Time SetupFloppy Setup Hard Disk SetupAdvanced Cmos Setup IDE Block Mode Transfer IDE LBA ModeInternal Cache Memory ShadowAdvanced Chipset Setup Power Management Setting Password Password CheckingAuto Configuration with Optimal Setting Auto Configuration with Fail Safe SettingExit Without Saving Bios ExitSave Settings and Exit Specifications BiosCPU PCBPage Placement & Dimensions PlacementDimensions Using Memory Bank Memory Banks & Programming RS-485CS1 CS0 SocketSend out one character Transmit Programming RS-485Initialize COM port Receive data Send out one character to COM1Page SSD Types Supported & Index SSD Types Supported10-2 Index Name Function

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.
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