Toshiba AR-B1375, AR-B1376, 386SX manual Keyboard Controller, Interrupt Controller

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AR-B1375/AR-B1376 User s Guide

2.3 KEYBOARD CONTROLLER

The 8042 processor is programmed to support the keyboard serial interface. The keyboard controller receives serial data from the keyboard, checks its parity, translates scan codes, and presents it to the system as a byte data in its output buffer. The controller can interrupt the system when data is placed in its output buffer, or wait for the system to poll its status register to determine when data is available.

Data can be written to the keyboard by writing data to the output buffer of the keyboard controller.

Each byte of data is sent to the keyboard controller in series with an odd parity bit automatically inserted. The keyboard controller is required to acknowledge all data transmissions. Therefore, another byte of data will not be sent to keyboard controller until acknowledgment is received for the previous byte sent. The “output buffer full” interruption may be used for both send and receive routines.

2.4 INTERRUPT CONTROLLER

The equivalent of two 8259 Programmable Interrupt Controllers (PIC) are included on the AR-B1375/AR-B1376 board. 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 : Reserved for watchdog

 

 

 

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

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Contents 386SX CPU Card Page Table of Contents Using Memory Banks Placement & Dimensions Bios ConsoleSpecifications & SSD Types Supported Programming RS-485 & IndexPreface Static Electricity Precautions OrganizationIntroduction OverviewPacking List Features DMA Controller System ControllerMicroprocessor DMA ControllerKeyboard Controller Interrupt ControllerHex Range Device 1 I/O Port Address Map2 I/O Channel Pin Assignment Bus I/O Port Address MapI/O Channel Pin Assignments Address Description TimerREAL-TIME Clock and NON-VOLATILE RAM Real-Time Clock & Non-Volatile RAMReceiver Buffer Register RBR Interrupt Enable Register IERSerial Port Transmitter Holding Register THRLine Status Register LSR Line Control Register LCRModem Control Register MCR Modem Status Register MSRRegister Address Parallel PortDivisor Latch LS, MS Printer Interface LogicPrinter Status Buffer Error Slct PE -ACK -BUSYPrinter Control Latch & Printer Control Swapper Page Setting UP the System OverviewPin Mini DIN Keyboard Connector CN3 System SettingKeyboard Connector AUX. Keyboard Connector J4Pin PC/104 Connector Bus C & D CN1 2 PC/104 ConnectorPin PC/104 Connector Bus a & B CN2 O Channel Signal Description Name DescriptionPin Signal Hard Disk IDE Connector CN4I/O Channel Signal’s Description HDD Pin AssignmentParallel Port Connector CN6 FDD Port Connector CN5CN6 RS-485 Terminator JP7 Serial PortRS-232/RS-485 Select for COM-B JP2 External RS-485 Adapter Select J6 & J7External Power LED Header J2 Reset Header J1RS-232 Connector CN7 & DB2 LED HeaderBattery Charger Select JP3 Power Connector J3External Battery External Speaker Header J5CPU Base Clock Select JP1 Dram ConfigurationExternal Battery Connector J11 SIMM1 SIMM2CRT/LCD Flat Panel Display Connecting the CRT MonitorVGA Setting JP5 IRQ 9 Used SelectCRT Connector DB1 LCD Flat Panel DisplayLCD Control Connector CN9 LCD ConnectorDE/E Signal from M or LP Select JP6 JP6 Inverter Board DescriptionLCD Display Assignment LCD Panel Display Connector CN8Supported LCD Panel Manufacture Model No DescriptionInstallation Utility DisketteWIN 95 Driver VGA DriverWIN 3.1 Driver StepSSD Utility RFG.EXE Write Protect Function RFGDEMO.PGFHardware Write Protect Enable the Software Write ProtectDisable the Software Write Protect Software Write ProtectTime-Out Setting Watchdog TimerWatchdog Timer Setting LEDWatchdog Timer Trigger Watchdog Timer EnabledWatchdog Timer Disabled Switch Setting Solid State DiskSSD Firmware Address Select SW1-2 Overview2 I/O Port Address Select SW1-1 DEVICE=C\DOS\EMM386.EXE X=C800-C9FFSimulate 2 Disk Drive SSD Drive Number SW1-3 & SW1-4Flash Eprom Sram ROM Type Select SW1-5 & SW1-6 Disk Drive Name ArrangementJumper Setting M1~M3 & JP4 Memory Type SettingSwitch and Jumper Setting ROM Disk InstallationUV Eprom 27Cxxx Software Programming Large Page 5V Flash DiskJP4 \PGM137X ROM pattern file name Using Tool Program Small Page 5V Flash ROM DiskTyping DOS Command RAM DiskCombination of ROM and RAM Disk \FORMAT RAM disk letter /UPage Bios Console Bios Setup OverviewFloppy Setup Standard Cmos SetupDate & Time Setup Hard Disk SetupAdvanced Cmos Setup Hard Disk Delay Password CheckWait for ‘F1’ If Error System KeyboardAdvanced Chipset Setup Password Checking Password SettingSetting Password Load Default SettingSave Settings and Exit Auto Configuration with Fail Safe SettingBios Exit Bios UpdateFile of AMIFLASH.EXE had to Version Specifications Specifications & SSD Types SupportedSSD Types Supported Winbond AtmelSST FujitshuCS1 CS0 Using Memory BanksRegister Port SocketPage Placement & Dimensions PlacementDimensions Initialize COM port Programming RS-485 & IndexProgramming RS-485 Send out one character TransmitOUT &H3FC, INP&H3FC and &HEF Return OUT &H3FC, INP%H3FC and &HFA ReturnPrint #1, OUTCHR$ INPSTR$ ReturnName Function

386SX, AR-B1376, AR-B1375 specifications

The Toshiba AR-B1375 and AR-B1376 are notable embedded computing solutions that incorporate the 386SX microprocessor architecture. Designed for various applications, these models focus on reliability, performance, and versatility, making them appealing choices for system integrators and developers.

At the core of the AR-B1375 and AR-B1376 is the Intel 386SX microprocessor. This landmark processor marked a significant advancement in computing technology, introducing a 32-bit architecture while maintaining compatibility with 16-bit applications. The 386SX is known for its efficient processing capabilities, offering both multitasking support and enhanced memory management. It operates at clock speeds ranging typically from 16 MHz to 25 MHz, contributing to its effectiveness in running industrial applications.

One of the key features of the AR-B1375 and AR-B1376 systems is their modular architecture, which allows for easy customization and expansion. This modularity means users can tailor the hardware according to specific requirements, making it suitable for a wide range of applications such as automation, telecommunications, and embedded systems.

Both models support various I/O options, ensuring seamless integration with peripherals and external devices. They typically come equipped with serial and parallel ports, as well as support for modern interfaces like USB. The systems also feature onboard expansion slots, enabling the addition of further functionality, such as additional memory or specialized processing units.

In terms of memory, the AR-B1375 and AR-B1376 support a range of RAM configurations, allowing users to scale their systems based on the application demands. The inclusion of EPROM and EEPROM options also facilitates easy updates and programmability, which is crucial for embedded systems that often require firmware adjustments over time.

Moreover, these models are known for their robust thermal management features, which are essential in industrial environments where conditions can be harsh. This capability ensures stable performance and longevity, reducing the risk of system failures due to overheating or environmental factors.

To summarize, the Toshiba AR-B1375 and AR-B1376, coupled with the 386SX microprocessor, offer a blend of performance, flexibility, and reliability. Their modular design, extensive I/O support, and memory scalability make them ideal for a variety of embedded computing applications, placing them as commendable options in the world of industrial computing solutions. These systems not only exemplify Toshiba's commitment to innovation but also contribute significantly to the functionality of embedded technologies in a rapidly evolving industry.
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