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PCA-6275 User's Manual

A.1

Programming the Watchdog Timer

To program the watchdog timer, you must write a program which
writes I/O port address 443 (hex). The output data is a time interval
value. The value range is from 01 (hex) to 3F (hex), and the related
time interval is 1 sec. to 63 sec.

Data

Time Interval

1 sec.

2 sec.

3 sec.

4 sec.

•

63 sec.

Содержание PCA-6275

Страница 1: ...PCA 6275 Pentium II processor based PCI ISA bus CPU card ...

Страница 2: ...However Advantech Co Ltd assumes no responsibility for its use nor for any in fringements upon the rights of third parties which may result from its use Acknowledgements AWARD is a trademark of AWARD Software Inc AMD is a trademark of Advanced Micro Devices Inc IBM and PC are trademarks of International Business Machines Corporation Intel is a trademark of Intel Corporation MS DOS is a trademark o...

Страница 3: ...formance from your products So if you run into technical difficulties we are here to help For the most frequently asked questions you can easily find answers in your product documentation These answers are normally a lot more detailed than the ones we can give over the phone So please consult this manual first If you still cannot find the answer gather all the information or questions that apply t...

Страница 4: ...materials service time and freight Please consult your dealer for more details If you think you have a defective product follow these steps 1 Collect all the information about the problem encountered For example type of PC CPU speed Advantech products used other hardware and software used etc Note anything abnormal and list any on screen messages you get when the problem occurs 2 Call your dealer ...

Страница 5: ... If any of these items are missing or damaged contact your distributor or sales representative immediately We have carefully inspected the PCA 6275 mechanically and electrically before shipment It should be free of marks and scratches and in perfect working order upon receipt As you unpack the PCA 6275 check it for signs of shipping damage For example damaged box scratches dents etc If it is damag...

Страница 6: ...Settings 11 1 8 1 How to set jumpers 11 1 8 2 CPU core frequency J1 11 1 8 3 Watchdog timer output J2 13 1 8 4 CMOS clear J4 13 1 9 System Memory 14 1 9 1 Sample calculation DIMM memory capacity 11 1 9 2 Supplementary information about DIMMs 11 1 10 Memory Installation Procedures 16 1 11 Cache Memory 17 1 12 Mounting the CPU and Cooling Modules 18 1 13 On board Support Bracket 21 Chapter 2 Connect...

Страница 7: ... J3 28 2 9 External Suspend Switch Lead SMI CN14 29 2 10 Serial Ports CN15 COM1 CN16 COM2 29 2 11 External Keyboard Connector CN17 30 2 12 Keyboard PS 2 Mouse Connector CN18 30 2 13 CPU Temperature Sensors CPU1 TR1 CPU2 TR2 30 Chapter 3 Award BIOS Setup 31 3 1 Introduction 32 3 2 Entering Setup 32 3 3 Standard CMOS Setup 33 3 4 BIOS Features Setup 34 3 4 1 Virus Warning 34 3 4 2 Quick Power On Sel...

Страница 8: ...d MEM base addr N A 41 3 8 Load BIOS Defaults 42 3 9 Load Setup Defaults 42 3 10 Integrated Peripherals 42 3 11 Password Setting 43 3 12 IDE HDD Auto Detection 43 3 13 Save Exit Setup 44 3 14 Exit Without Saving 44 Chapter 4 On board Security Setup 45 4 1 Introduction 46 4 2 Installation of OBS Devices 46 4 3 Driver Installation 47 4 3 1 Necessary prerequisites 47 4 3 2 Before you begin 47 4 3 3 W...

Страница 9: ...PU Fan Power Connectors CN8 CN9 66 B 8 Floppy Drive Connector CN7 67 B 9 Parallel Port Connector CN5 68 B 10 IR Connector CN3 69 B 11 HDD LED Connector CN12 69 B 12 Power LED and Keylock Connector CN11 69 B 13 External Speaker CN10 70 B 14 System I O Ports 71 B 15 DMA Channel Assignments 72 B 16 Interrupt Assignments 72 B 17 1st MB Memory Map 73 ...

Страница 10: ...x ...

Страница 11: ...ckground information on the PCA 6275 It then shows you how to configure the card to match your application and prepare it for installation into your PC Sections include Card specifications Board layout Safety precautions Jumper settings 1 CHAPTER ...

Страница 12: ...nclude two RS 232 serial ports 16C550 UARTs with 16 byte FIFO or compatible one enhanced parallel port supports EPP ECP and support for two USB Universal Serial Bus ports The PCI Bus Master IDE controller supports Ultra DMA 33 operation This provides data transfer rates of over 33 MB sec System BIOS supports boot up from an IDE CD ROM SCSI CD ROM and LS 120 A backup of CMOS data is stored in the F...

Страница 13: ...ATX power control connector to meet ACPI requirements Two enhanced IDE ports supporting Ultra DMA 33 PIO Mode 4 and DMA Mode 2 Two USB ports Two serial ports One bidirectional parallel port supports ECP EPP SPP One floppy port and one keyboard mouse port PCI V2 1 compliant PICMG 2 0 compliant Additional metal bracket to provide board stability with Pentium II processor CMOS backup battery life of ...

Страница 14: ... transfer rate BIOS enabled disabled Floppy disk drive interface Supports up to two floppy disk drives 5 360 KB and 1 2 MB and or 3 720 KB 1 44 MB and 2 88 MB BIOS enabled disabled Memory RAM Up to 768 MB in three available 168 pin DIMM sockets Supports PC100 compliant SDRAMs ECC parity DRAM only Modules can detect multi bit memory errors Correction of 1 bit memory errors Input Output Bus interfac...

Страница 15: ... also available ISA driver current 64 mA High Drive Industrial features Watchdog timer Can generate a system reset or IRQ11 The watchdog timer is programmable with each unit equal to one second 63 levels The program uses I O ports hex 443h to control the watchdog timer Mechanical and environmental specifications Operating temperature 0 60 C 32 140 F Storage temperature 40 60 C 40 140 F Humidity 20...

Страница 16: ...l connector Bi directional parallel port Accommodates three DIMM modules up to 768 MB Intel Pentium II processor up to 500 MHz Intel 82440BX PCIset PS 2 mouse keyboard connector USB port EIDE connector COM1 connector COM2 connector Metal bracket for stability FDD connector ...

Страница 17: ...r of jumpers used to configure your system for your application The tables below list the function of each of the board jumpers and connectors Later sections in this chapter give instructions on setting jumpers Chapter 2 gives instructions for connecting external devices to your card Table 1 1 Jumpers Label Function J1 CPU core frequency J2 Watchdog output J3 ATX soft power switch J4 Clear CMOS ...

Страница 18: ...TX feature connector CN7 Floppy driver connector CN8 CPU 2 fan power connector CN9 CPU 1 fan power connector CN10 External speaker CN11 Keyboard lock and power LED CN12 IDE LED CN13 Reset connector CN14 External SMI CN15 Serial port COM1 CN16 Serial port COM2 CN17 External keyboard connector CN18 PS 2 keyboard and mouse RT1 CPU 1 temperature sensor RT2 CPU 2 temperature sensor ...

Страница 19: ...Layout Jumper and Connector Locations Figure 1 1 Board layout jumper and connecter locations DIMM3 DIMM2 DIMM1 CN2 CN1 CN8 CN7 CN3 CN4 CN15 CN16 CN18 CN17 SLOT 1 Secondary SLOT 1 Primary 440 BX CN11 CN14 J4 CN13 RT1 RT2 CN6 CN12 J2 J3 CN10 CN8 CN9 ...

Страница 20: ... damaged by sudden power surges Only experienced electronics personnel should open the PC chassis Caution Always ground yourself to remove any static charge before touching the CPU card Modern electronic devices are very sensitive to static electric charges As a safety precaution use a grounding wrist strap at all times Place all electronic components in a static dissipative surface or static shie...

Страница 21: ... protected by a plastic cover that slides over the pins to connect them To close a jumper you connect the pins with the clip To open a jumper you remove the clip Sometimes a jumper consists of a set of three pins labeled 1 2 and 3 In this case you connect either pins 1 and 2 or 2 and 3 A pair of needle nose pliers may be useful when setting jumpers 1 8 2 CPU core frequency J1 You must configure yo...

Страница 22: ... closed closed 266 MHz open open open 300 MHz open open closed 333 MHz open closed open 350 MHz closed closed closed 400 MHz open open open 450 MHz open open closed 500 MHz open closed open 2 4 6 1 3 5 1 3 5 2 4 6 2 4 6 1 3 5 2 4 6 1 3 5 1 3 5 2 4 6 2 4 6 1 3 5 1 3 5 2 4 6 1 3 5 2 4 6 ...

Страница 23: ... timer is tripped Table 1 4 Watchdog timer output J2 Function Jumper setting IRQ11 1 2 closed Reset 2 3 closed 1 8 4 CMOS clear J4 The PCA 6275 CPU card contains a jumper that can erase CMOS data and reset the system BIOS information Normal ly this jumper should be set with pins 1 2 closed If you want to reset the CMOS data set J4 to 2 3 closed for just a few seconds and then move the jumper back ...

Страница 24: ... following table to calculate the total DRAM memory within your computer Table 1 6 DIMM module allocation table Socket number 168 pin DIMM memory 1 16 32 64 128 or 256 MB x 1 2 16 32 64 128 or 256 MB x 1 3 16 32 64 128 or 256 MB x 1 1 9 1 Sample calculation DIMM memory capacity Suppose you install a 128 MB DIMM into your PCA 6275 s socket 1 a 32 MB DIMM into socket 2 and you leave socket 3 empty Y...

Страница 25: ...e PC100 compliant DIMMs Most systems will not even boot if non compliant modules are used This is due to strict timing issues involved st this speed SDRAM chips are usually thinner and have higher pin density than EDO chips Chips with 9 chips side support ECC chips with 8 chips side do not support ECC Single sided modules are typically 16 or 64 MB double sided modules are usually 8 32 128 or 256 M...

Страница 26: ...ong the plastic guides on both ends of the socket Then press the DIMM module right down into the socket until you hear a click This is when the two handles have automatically locked the memory module into the correct position of the DIMM socket See Figure 1 2 To take away the memory module just push both handles outward and the memory module will be ejected by the mechanism in the socket Figure 1 ...

Страница 27: ...ance than the external cache memories The cache size in the Pentium II CPU is either 256 KB or 512 KB Normally for worksta tion and server application the 256 KB version is enough However if your system is for heavy duty applications the 512 KB version will help a lot Specifically for our Pentium II based SBC the Pentium II has another version that provides much better data security if combined wi...

Страница 28: ...ith a cooling fan attached to the heat sink of the Pentium II module the other with a huge heat sink without any cooling fan attached The first of these methods is recommended Both cooling methods for the Pentium II require a retention module to firmly fix the Pentium II CPU to slot 1 Figure 1 3 illustrates the steps involved in mounting the retention module and installing the CPU and cooling modu...

Страница 29: ...Chapter 1 Hardware Configuration 19 Figure 1 4 Mounting CPU and cooling modules Step 2 Step 2 ...

Страница 30: ...20 PCA 6275 User s Manual Figure 1 5 Mounting CPU and cooling modules Step 3 Step 3 ...

Страница 31: ...Configuration 21 1 13 On board Support Bracket Advantech s PCA 6275 Pentium II also includes an on board metal bracket to provide balanced support for the Pentium II processor cartridge Figure 1 6 On board support bracket ...

Страница 32: ...22 PCA 6275 User s Manual ...

Страница 33: ...indicators to the PCA 6275 board You can access most of the connectors from the top of the board while it is installed in the chassis If you have a number of cards installed or your chassis is very tight you may need to partially remove the card to make all the connections 2 C HAPTER ...

Страница 34: ...es to a single connector you will need to set one as the master and one as the slave You do this by setting the jumpers on the drives If you use just one drive per connector you should set each drive as the master See the documentation that came with your drive for more information Connect the first hard drive to the other end of the cable Wire 1 on the cable should also connect to pin 1 on the ha...

Страница 35: ...board parallel port accessed through a 26 pin flat cable connector CN5 The card comes with an adapter cable which lets you use a traditional DB 25 connector The cable has a 26 pin connector on one end and a DB 25 connector on the other mounted on a retaining bracket The bracket installs at the end of an empty slot in your chassis giving you access to the connector The parallel port is designated a...

Страница 36: ... unplug your power supply when adding or removing expansion cards or other system components Failure to do so may cause severe damage to both your CPU card and expansion cards 2 ATX power supplies may power on if certain motherboard components or connections are touched by metallic objects Important Be sure that the ATX power supply can take at least a 10 mA load on the 5 V standby lead 5VSB If no...

Страница 37: ...ble is a 34 pin flat cable connector On the other end are two sets of floppy disk drive connectors Each set consists of a 34 pin flat cable connector usually used for 3 5 drives and a printed circuit board connector usually used for 5 25 drives You can use only one connector in each set The set on the end after the twist in the cable connects to the A floppy drive The set in the middle connects to...

Страница 38: ...mation on the pin assignments The system s power LED status is indicated below according to the power supply used Power Mode LED PS 2 Power LED ATX Power System On On On System Suspend Flashes fast Flashes fast System Off Off Flashes slowly If an ATX power supply is used refer to Section 2 5 1 2 8 3 IDE LED CN12 You can connect an LED to connector CN12 to indicate when the HDD is active 2 8 4 Rese...

Страница 39: ...e keyboard will always allow wake up The SMI lead cannot wake up the system If you want to use the SMI connector the Suspend switch in the Power Manage ment Setup of the BIOS software should be on the default setting Enable 2 10 Serial Ports CN15 COM1 CN16 COM2 The PCA 6275 offers two serial ports CN15 as COM1 and CN16 as COM2 These ports can connect to serial devices such as a mouse printers and ...

Страница 40: ...rd provides a keyboard connector A 6 pin mini DIN connector CN18 on the card mounting bracket supports single board computer applications The card comes with an adapter to convert from the 6 pin mini DIN connector to a standard DIN connector and to a PS 2 mouse connector 2 13 CPU Temperature Sensors CPU1 RT1 CPU2 RT2 This connector supports hardware which monitors the CPU tempera ture If you have ...

Страница 41: ...Award BIOS Setup This chapter describes how to set the card s BIOS configuration data CHAPTER 3 ...

Страница 42: ...s a number assigned to the patch code it means that the BIOS supports your CPU If there is no number assigned to the patch code please contact Advantech s applications engineer to obtain an up to date patch code file This will ensure that your CPU s system status is valid After ensuring that you have a number assigned to the patch code press Del to allow you to enter the setup Note BIOS versions a...

Страница 43: ... STANDARD CMOS SETUP option from the INITIAL SETUP SCREEN menu and the screen below will be displayed This standard setup menu allows users to configure system components such as date time hard disk drive floppy drive display and memory Figure 3 1 CMOS setup screen ...

Страница 44: ...tion is provided for your convenience Simply enable the Quick Booting item to save yourself valuable time Figure 3 2 BIOS features setup screen 3 4 1 Virus Warning While the system is booting up and after boot up any attempt to write to the boot sector or partition table of the hard disk drive will halt the system In this case a warning message will be displayed You can run the anti virus program ...

Страница 45: ...ng boot sequences A C SCSI C A SCSI Default C CDROM A CDROM C A D A SCSI E A SCSI F A SCSI SCSI A C SCSI C A C only LS120 C 3 4 4 Boot Up Floppy Seek During POST BIOS will determine if the floppy disk drive installed is 40 or 80 tracks A 360 KB type drive is 40 tracks while 720 KB 1 2 MB and 1 44 MB type drives are all 80 tracks Enabled BIOS searches the floppy drive to determine if it is 40 or 80...

Страница 46: ... Typematic Rate Chars Sec BIOS accepts the following input values characters second for typematic rate 6 8 10 12 15 20 24 30 3 4 9 Typematic Delay msec Typematic delay is the time interval between the appearance of the first and second characters when holding down a key The input values for this category are 250 500 750 1000 msec 3 4 10 Security Option This setting determines whether the system wi...

Страница 47: ...ay not show colors properly The setting Enabled should correct this problem Otherwise leave this on the setup default setting of Disabled 3 4 12 OS Select for DRAM 64 MB This setting is under the OS 2 system 3 4 13 Video BIOS Shadow This determines whether video BIOS will be copied to RAM which is optional according to the chipset design When enabled Video BIOS Shadow increases the video speed 3 4...

Страница 48: ... sample screen contains the manufacturer s default values for the PCA 6275 If you enable the OBS function you can view the temperature fan speed and voltage of your PC system The data will be displayed in similar fashion to the display shown in Fig 3 3 Figure 3 3 CHIPSET features setup screen Note If you enable the IDE HDD block mode the enhanced IDE driver will be enabled ...

Страница 49: ...n 3 6 1 Power Management This option allows you to determine if the values in power management are disabled user defined or predefined 3 6 2 HDD Power Management You can choose to turn the HDD off after one of the time intervals listed or when the system is in Suspend mode If the HDD is in a power saving mode any access to it will wake it up Note The HDD will not power down if the Power Management...

Страница 50: ...will put the system in system on mode You can choose Delay 4 sec If you do then pushing the button for more than 4 seconds will turn off the system whereas pushing the button momentarily for less than 4 seconds will switch the system to suspend mode 3 6 4 IRQ Activity IRQ can be set independently Activity on any enabled IRQ will wake up the system 3 7 PCI Configuration Setup Figure 3 5 PCI configu...

Страница 51: ... DMA channel for each field is being used by a legacy non PnP card Two options are available PCI ISA PnP or Legacy ISA The first option the default setting indicates that the displayed DMA channel is not used to determine if an ISA card is using that channel If you install a legacy ISA card that requires a unique DMA channel you must set the field for that channel to Legacy ISA 3 7 3 Used MEM base...

Страница 52: ...meters for stability These default values are loaded automatically if the stored record created by the setup program becomes corrupted and therefore unusable 3 9 Load Setup Defaults Load SETUP Defaults loads the values required by the system for maximum performance 3 10 Integrated Peripherals Figure 3 6 Integrated peripherals ...

Страница 53: ...CMOS The screen will display the following message Enter the current password and press Enter 3 After pressing Enter ROM password or the current password user defined you can change the password stored in the CMOS The password must be no longer than eight 8 characters Remember to enable the password setting feature you must first select either Setup or System to secure your option in BIOS FEATURES...

Страница 54: ...S memory of the chipset The microprocessor will check this every time you turn your system on and compare this to what it finds as it checks the system This record is required for the system to operate 3 14 Exit Without Saving Selecting this option and pressing Enter lets you exit the setup program without recording any new values or changing old ones ...

Страница 55: ...rd Security Setup This chapter explains OBS concepts and provides instructions for installing the relevant software drivers This is done using the OBS driver disks included in your PCA 6275 package CHAPTER 4 ...

Страница 56: ...e from CPU to chipset typically 1 5 V Chipset voltage typically 3 3 V Main voltage 5 V 12 V The negative system voltage sets which can be monitored include Main voltage 5 V 12 V 4 2 Installation of OBS Devices After you have mounted the CPU and cooling modules enable the OBS functions as follows 1 Take the specially designed temperature sensor cables out of the accessories bag 2 Connect the 2 pin ...

Страница 57: ...e uncertain about any of these concepts please refer to DOS or Windows user reference guides for more information before you proceed with the installation 4 3 2 Before you begin Before you begin installing software drivers you should make a backup copy of the display driver disk and store the original in a safe place The display driver disk contains drivers for several versions of certain applicat...

Страница 58: ...275 User s Manual 4 3 3 Windows 95 drivers setup procedure 1 Insert the OBS driver disk into drive A Type A setup exe Press Enter to run the driver SETUP program Figure 4 1 Hardware Doctor setup initial screen ...

Страница 59: ... 2 If your operating system is Win95 you will see the following screen images after running the driver You must then reboot your system start the procedure from Step 1 again and then proceed directly to Step 3 Figure 4 2 Setup under Win95 ...

Страница 60: ...50 PCA 6275 User s Manual Figure 4 3 Restarting Windows ...

Страница 61: ...Chapter 4 On board Security Setup 51 3 Follow the screen instructions to install the software Figure 4 4 Hardware Doctor setup installation screen ...

Страница 62: ...52 PCA 6275 User s Manual 4 Complete the setup Figure 4 5 Hardware Doctor setup completion screen ...

Страница 63: ...Chapter 4 On board Security Setup 53 5 Using your file manager click on Hardware Doctor in drive C and then click on W83781 Figure 4 6 Exploring Hardware Doctor ...

Страница 64: ...ser s Manual 6 It is recommended that you load the default values for all the OBS settings However if desired you can establish new conditions for voltage fan speed and temperature Figure 4 7 Winbond Hardware Doctor ...

Страница 65: ...f the bottom window bar This icon is the Terminate and Stay Resident TSR icon It will permanently remain in the bottom window bar and will activate warning signals when triggered by the on board security system Figure 4 8 Terminate and Stay Resident TSR icon on the right side of the bottom window bar ...

Страница 66: ...age being delivered as soon as any monitored reading exceeds safe limits for the first time Alternatively you can set up Count 3 This will result in a warning message being delivered only after any monitored reading exceeds safe limits for a third time It is recommended that you load the default settings for all the OBS functions Figure 4 9 Monitoring Config ...

Страница 67: ...ter completing the setup all the OBS functions are permanently enabled When a monitored reading exceeds safe limits a warning message will be displayed and an error beep tone will activate to attract your attention Figure 4 10 Warning display ...

Страница 68: ...58 PCA 6275 User s Manual ...

Страница 69: ...A 6275 is equipped with a watchdog timer that resets the CPU or generates an interrupt if processing comes to a standstill for any reason This feature ensures system reliability in industrial standalone or unmanned environments A APPENDIX ...

Страница 70: ...e watchdog timer you must write a program which writes I O port address 443 hex The output data is a time interval value The value range is from 01 hex to 3F hex and the related time interval is 1 sec to 63 sec Data Time Interval 01 1 sec 02 2 sec 03 3 sec 04 4 sec 3F 63 sec ...

Страница 71: ...ample shows how you might program the watchdog timer in BASIC 10 REM Watchdog timer example program 20 OUT H443 data REM Start and restart the watchdog 30 GOSUB 1000 REM Your application task 1 40 OUT H443 data REM Reset the timer 50 GOSUB 2000 REM Your application task 2 60 OUT H443 data REM Reset the timer 70 X INP H443 REM Disable the watchdog timer 80 END 1000 REM Subroutine 1 your application...

Страница 72: ...62 PCA 6275 User s Manual ...

Страница 73: ...use connector External keyboard connector ATX feature connector IDE hard drive connector USB connector CPU fan power connector Floppy drive connector Parallel port connector IR connector HDD LED connector Power LED and keylock connector External speaker System I O ports DMA channel assignments Interrupt assignments 1st MB memory map APPENDIX B ...

Страница 74: ...gnal 1 DCD 2 RXD 3 TXD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 RI B 2 Keyboard and Mouse Connnector CN18 Table B 2 Keyboard and mouse connector CN18 Pin Signal 1 KB DATA 2 MS DATA 3 GND 4 VCC 5 KB CLOCK 6 MS CLOCK B 3 External Keyboard Connector CN17 Table B 3 External keyboard connector CN17 Pin Signal 1 CLK 2 DATA 3 NC 4 GND 5 VCC ...

Страница 75: ...RESET 2 GND 3 DATA 7 4 DATA 8 5 DATA 6 6 DATA 9 7 DATA 5 8 DATA 10 9 DATA 4 10 DATA 11 11 DATA 3 12 DATA 12 13 DATA 2 14 DATA 13 15 DATA 1 16 DATA 14 17 DATA 0 18 DATA 15 19 SIGNAL GND 20 N C 21 N C 22 GND 23 IO WRITE 24 GND 25 IO READ 26 GND 27 IO CHANNEL READY 28 N C 29 HDACKO 30 GND 31 IRQ14 32 IOCS16 33 ADDR 1 34 N C 35 ADDR 0 36 ADDR 2 37 HARD DISK SELECT 0 38 HARD DISK SELECT 1 39 IDE ACTIVE...

Страница 76: ...le B 6 USB1 USB2 connector CN4 Pin USB1 Signal Pin USB2 Signal 1 5 V 2 5 V 3 UV 4 UV 5 UV 6 UV 7 GND 8 GND 9 Chassis GND 10 Key B 7 CPU Fan Power Connectors CN8 CN9 Table B 7 CPU fan power connector CN8 9 Pin Signal 1 GND 2 12 V 3 Detect 1 9 2 10 1 2 3 ...

Страница 77: ...ECT 3 GND 4 N C 5 GND 6 N C 7 GND 8 INDEX 9 GND 10 MOTOR 0 11 GND 12 DRIVE SELECT 1 13 GND 14 DRIVE SELECT 0 15 GND 16 MOTOR 1 17 GND 18 DIRECTION 19 GND 20 STEP 21 GND 22 WRITE DATA 23 GND 24 WRITE GATE 25 GND 26 TRACK 0 27 GND 28 WRITE PROTECT 29 GND 30 READ DATA 31 GND 32 HEAD SELECT 33 GND 34 DISK CHANGE low active 33 31 3 1 34 32 4 2 ...

Страница 78: ...r CN5 Table B 9 Parallel port connector CN5 Pin Signal 1 STROBE 2 AUTOFD 3 D0 4 ERR 5 D1 6 INIT 7 D2 8 SLCTINI 9 D3 10 GND 11 D4 12 GND 13 D5 14 GND 15 D6 16 GND 17 D7 18 GND 19 ACK 20 GND 21 BUSY 22 GND 23 PE 24 GND 25 SLCT 26 N C 13 12 2 1 26 25 15 14 ...

Страница 79: ... use an LED to indicate when the CPU card is on Pin 1 of CN11 supplies the LED s power and Pin 3 is the ground You can use a switch or a lock to disable the keyboard so that the PC will not respond to any input This is useful if you do not want anyone to change or stop a program which is running Simply connect the switch from Pin 4 to Pin 5 of CN11 Table B 12 Power LED and keylock connector CN11 P...

Страница 80: ...l B 13 External Speaker CN10 The CPU card has its own buzzer You can also connect it to the external speaker on your computer chassis Table B 13 External speaker CN10 Pin Function 1 5 VCC 2 GND 3 Internal buzzer 4 Speaker out ...

Страница 81: ...ntroller 2 0C0 0DF DMA controller 0F0 Clear math co processor 0F1 Reset math co processor 0F8 0FF Math co processor 1F0 1F8 Fixed disk 200 207 Game I O 278 27F Parallel printer port 2 LPT 3 290 297 On board hardware monitor 2F8 2FF Serial port 2 300 31F Prototype card 360 36F Reserved 378 37F Parallel printer port 1 LPT 2 380 38F SDLC bisynchronous 2 3A0 3AF Bisynchronous 1 3B0 3BF Monochrome disp...

Страница 82: ...terrupt Interrupt source 1 NMI Parity error detected 2 IRQ 0 Interval timer 3 IRQ 1 Keyboard IRQ 2 Interrupt from controller 2 cascade 4 IRQ 8 Real time clock 5 IRQ 9 Cascaded to INT 0A IRQ 2 6 IRQ 10 Available 7 IRQ 11 Available 8 IRQ 12 PS 2 mouse 9 IRQ 13 INT from co processor 10 IRQ 14 Fixed disk controller 11 IRQ 15 Available 12 IRQ 3 Serial communication port 2 13 IRQ 4 Serial communication ...

Страница 83: ...B Memory Map Table B 17 1st MB memory map Addr range Hex Device F0000h FFFFFh System ROM C8000h EFFFFh Unused C0000h C7FFFh VGA BIOS B8000h BFFFFh CGA EGA VGA text B0000h B7FFFh Unused A0000h AFFFFh EGA VGA graphics 00000h 9FFFFh Base memory ...

Страница 84: ...74 PCA 6275 User s Manual ...

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