Sony 486DX, DX4, AR-B1474 manual Power Management

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AR-B1474 User¡¦s Guide

Parity Check

This option enables or disables parity error checking for all system RAM. This option must be Disabled if the used DRAM SIMMs are 32-bit but not 36-bit devices.

Slow Refresh

This options sets the DRAM refresh cycle time. The settings are 15us, 30us, 60us, and 120us.

Hidden Refresh

Hidden refresh separates refreshing of AT-bus memory and local DRAM. The AT-bus controller arbitrates between CPU accesses to the AT bus, DMA, and AT refresh, while the DRAM controller arbitrates between CPU DRAM accesses and DRAM refresh cycle.

Ext. Cache WB/WT Feature

This option selects the type of caching algorithm of secondary cache memory. The settings are Wr-Thru or Wr- Back.

Int. Cache WB/WT Feature

This option selects the type of caching algorithm of CPU internal cache memory. The settings are Wr-Thru or Wr- Back.

ISA Write Cycle Insert WS

When Enabled, the wait state is added in both I/O and memory write cycle.

16-Bit ISA I/O Command WS

This option sets the wait state of 16-bit I/O cycle. The settings are 0WS, 1WS, 2WS, and 3WS.

16-Bit ISA Mem. Command WS

This option sets the wait state of 16-bit memory cycle. The settings are 0WS, 1WS, 2WS, and 3WS.

Polling Clock Select

This option sets the polling clock of IRQ and DRQ signals. The settings are CLK2, CLK2/2, CLK2/3, CLK2/4, 28.6MHz, and 14.3MHz.

6.5 POWER MANAGEMENT

This section is used to configure Power management setup for configuring power management features.

IDE Standby Mode (Min.)

This option specifies the length of time of hard disk drive inactivity that must expire before the IDE hard disk drive is placed in IDE Standby Power Down Mode.

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Contents Industrial Grade 486DX/DX2/DX4 CPU Card Page Table of Contents Memory Banks & Programming RS-485 Bios ConsoleSpecifications Placement & Dimensions SSD Types Supported & IndexPreface Static Electricity Precautions OrganizationOverview IntroductionFeatures Packing ListKeyboard Controller System ControllerDMA Controller DMA ControllerInterrupt Controller Interrupt ControllerHex Range Device 1 I/O Port Address MapI/O Port Address Map Address Description TimerReal-Time Clock and Non-Volatile RAM Real-Time Clock & Non-Volatile RAMISA Bus Pin Assignment ISA Bus Pin AssignmentISA Bus Signal Description Name DescriptionTransmitter Holding Register THR Serial PortReceiver Buffer Register RBR DlabLine Control Register LCR Interrupt Enable Register IERInterrupt Identification Register IIR Modem Control Register MCRDivisor Latch LS, MS Parallel PortModem Status Register MSR Register AddressPrinter Status Buffer Data SwapperPrinter Control Latch & Printer Control Swapper Setting UP the System OverviewSerial Port System SettingRS-232 Connector DB1 & DB2 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 PC/104 ISA Bus Signal Description IRQ 3-7, 9-12, 14CPU Voltage Select JP2 CPU SettingAMD DX2-80 CPU Select JP1 AMD 4X CPU 5x86 Select JP15CPU Clock Setting CPU Clock Select JP6 & JP9Cache RAM Size Select JP8 Memory SettingDram Configuration SIMM1Keyboard Connector LED Header J1, J2 & J4External Speaker Header J3 Reset Header J7Battery Setting CRT Display Type Select JP13Page Installation Utility Diskette PGM1474.EXEWP1474.EXE WD1474.EXEBU1474.EXE Display Error in PGF File Help to PGF FileWrite Protect Function Enable the Software Write ProtectDisable the Software Write Protect Hardware Write ProtectTime-Out Setting Watchdog TimerWatchdog Timer Setting Time Factor Time-Out Period SecondsWatchdog Timer Trigger Watchdog Timer EnabledWatchdog Timer Disabled Page Switch Setting Solid State DiskSSD Firmware Address Select SW1-3 & SW1-4 Overview2 I/O Port Address Select SW1-1 & SW1-2 DEVICE=C\DOS\EMM386.EXE X=C800-CFFFSimulate 2 Disk Drive SSD Drive Number SW1-5 & SW1-6Flash Eprom Sram ROM Type Select SW1-7 & SW1-8 Disk Drive Name ArrangementJumper Setting SSD Bios Select JP7Switch and Jumper Setting SSD Memory Type Setting M1 ~ M3 & JP5ROM Disk Installation 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 DiskSSD Bios Setting JP7 Installation D.O.CHardware Setting Combination of ROM and RAM DiskSoftware Setting O.C. Setting SW1-8Page Bios Console Bios Setup OverviewFloppy Setup Standard Cmos SetupDate & Time Setup Hard Disk SetupAdvanced Cmos Setup Internal Cache Memory IDE Block Mode TransferIDE LBA Mode ShadowAdvanced Chipset Setup Power Management Auto Configuration with Optimal Setting Setting PasswordPassword Checking Auto Configuration with Fail Safe SettingSave Settings and Exit Bios ExitExit Without Saving CPU SpecificationsBios PCBPage Placement & Dimensions PlacementDimensions CS1 CS0 Using Memory BankMemory Banks & Programming RS-485 SocketInitialize COM port Programming RS-485Send out one character Transmit 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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