Sony 486DX, DX4, AR-B1474 manual Interrupt Controller

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AR-B1474 User¡¦s Guide

2.3 INTERRUPT CONTROLLER

The equivalent of two 8259 Programmable Interrupt Controllers (PIC) are included on the AR-B1474 card. They accept requests from peripherals, resolve priorities on pending interrupts in service, issue interrupt requests to the CPU, and provide vectors which are used as acceptance indices by the CPU to determine which interrupt service routine to execute.

Following is the system information of interrupt levels:

Interrupt Level		Description


NMI		Parity check
CTRL1		CTRL2
IRQ 0	System timer interrupt from timer 8254
IRQ 1	Keyboard output buffer full

IRQ 2
			IRQ8 : Real time clock


			IRQ9 : Rerouting to INT 0Ah from hardware IRQ2
			IRQ10 : Spare
			IRQ11 : Spare
			IRQ12 : Spare
			IRQ13 : Math. coprocessor
			IRQ14 : Hard disk adapter
			IRQ15 : Spare (Watchdog Timer)
			IRQ15 : Spare (Watchdog Timer)
IRQ 3			Serial port 2
IRQ 4			Serial port 1
IRQ 5			Parallel port 2
IRQ 6			Floppy disk adapter
IRQ 7			Parallel port 1
			Figure 2-1 Interrupt Controller

2-2

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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 Organization Overview 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

2.3 INTERRUPT CONTROLLER

Figure 2-1 Interrupt Controller