PCA-6145B Half-size 486 All-in-one CPU Card with Panel/CRT and Ethernet Interface PCA-6145L Half-size 486 All-in-one CPU Card with Panel/CRT Interface
Copyright Notice This document is copyrighted, 2004, by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd., reserves the right to make improvements to the products described in this manual at any time without notice. No part of this manual may be reproduced, copied, translated, or transmitted in any form or by any means without the prior written permission of Advantech Co., Ltd. Information provided in this manual is intended to be accurate and reliable. However, Advantech Co., Ltd.
A Message to the Customer Advantech Customer Services Each and every Advantech product is built to the most exacting specifications to ensure reliable performance in the unusual and demanding conditions typical of industrial environments. Whether your new Advantech equipment is destined for the laboratory or the factory floor, you can be assured that it will provide the reliability and ease of operation for which the name Advantech has come to be known. Your satisfaction is our number one concern.
Product warranty Advantech warrants to you, the original purchaser, that each of its products will be free from defects in materials and workmanship for one year from the date of purchase. This warranty does not apply to any products which have been repaired or altered by other than repair personnel authorized by Advantech, or which have been subject to misuse, abuse, accident or improper installation. Advantech assumes no liability as a consequence of such events under the terms of this Warranty.
Packing list Before you begin installing your card, please make sure that the following materials have been shipped: • 1 PCA-6145B/6145L CPU card • 1 6-pin mini-DIN keyboard & PS/2 mouse adapter • 1 Hard disk drive (IDE) interface cable (40 pin) • 1 Floppy disk drive interface cable (34 pin) • 1 Parallel port adapter (26 pin) and COM2 adapter (9 pin) kit • 1 Utility disk with system VGA BIOS, utility with Win.
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Contents Chapter 1 Hardware Configuration ................................2 1.1 1.2 1.3 Introduction ....................................................................... 2 Specifications .................................................................... 2 Board layout ...................................................................... 5 Figure 1.1:Dimensions(component side)........................ 5 Figure 1.2:Jumper & Conn (component side) ................ 6 Figure 1.
3.1.10 Save & Exit setup ......................................................... 34 3.1.11 Exit without saving ....................................................... 34 Chapter 4 Display & Ethernet Soft/Hardware Config .36 4.1 4.2 PCA-6145B/PCA-6145L Utility Disk ............................ 36 VGA Display Software Configuration............................ 37 4.3 4.4 4.5 VGA Win 95 Driver Support .......................................... 39 Ethernet Software Configuration ..........................
Table C.14:Interrupt assignments ................................. 68 Table C.15:Timer channel assignments........................ 68 Appendix D Detailed system information..........................70 D.1 POST LEDs.....................................................................
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CHAPTER 1 Hardware Configuration 1
Chapter 1 Hardware Configuration 1.1 Introduction The PCA-6145B/6145L is a full-function CPU card which integrates the VGA LCD panel, Ethernet and other enhanced I/O interfaces on a halfsize CPU card. This card uses a 80486 DX, DX2, DX4 CPU or 5x86 series and can have up to 32 MB DRAM and EDO RAM. It also provides an optional 128 KB cache RAM. The PCA-6145B/6145L offers power management to minimize power consumption.
• EIDE interface: Supports up to two IDE devices. BIOS supports up to 8.4 GB HDD. 32-bit host data transfer, PIO Mode 3 transfer capabilities (>10 MB/sec) • Floppy disk drive interface: Supports up to two floppy disk drives, 5¼” (360 KB and 1.2 MB) and/or 3½” (720 KB, 1.44 MB, and 2.
• Display BIOS: Default CRT/Toshiba TFT panel BIOS, Flash BIOS can be easily updated Mechanical and environmental • Board size: 185 mm x 122 mm • Max. power requirements: +5 V, 3.5 A • Power supply voltage: +5 V (4.75 V to 5.25 V) • Operating temperature: 32 to 140oF (0 to 60oC) • Storage temperature: -40 to +176°F (-40 to +80oC) • Humidity: 5 to 95%, non-condensing • Board size: 7.3" (L) x 4.8" (W) (185 mm x 122 mm) • Board weight: 1.2 lb. (0.
1.3 Board layout Figure 1.
Figure 1.
Figure 1.
1.4 Jumpers and connectors Connectors on the board link it to external devices such as hard disk drives, a keyboard, or floppy drives. In addition, the board has a number of jumpers which you use to configure it for your application. The table below lists the function of each of the board jumpers and connectors. Later sections in this chapter give instructions on setting jumpers and detailed information on each jumper setting. Chapter 2 gives instructions for connecting external devices to your card.
COM2 J1 J2 J3 J4 J5 J6 J7 Serial port 2 connector SBC power connector VGA connector Ethernet connector External Keyboard connector Keyboard connector Keyboard lock Speaker 1.5 Safety precautions Follow these simple precautions to protect yourself from harm and your PC from damage. Warning! 1.Please read these safety instructions carefully 2.Please keep this User‘s Manual for later reference 3.Please disconnect the board from AC outlet before cleaning.
This device complies with the requirements in part 15 of the FCC rules: Operation is subject to the following two conditions: 1.This device may not cause harmful interference, and 2.This device must accept any interference received, including interference that may cause undesired operation This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
1.6 Jumper settings This section tells how to set the jumpers to configure your card. It gives the card default configuration and your options for each jumper. After you set the jumpers and install the card, you will also need to run the BIOS Setup program (discussed in Chapter 3) to configure the serial port addresses, floppy/hard disk drive types and system operating parameters. Connections, such as hard disk cables, appear in Chapter 2.
CPU type select In order for the system to function properly, the jumpers must be set to accommodate the CPU installed on the CPU card. CPU type select CPU Type JP4 JP5 JP6 JP7 JP8 JP11 JP13 JP14 JRN1 JRN2 JRN3 Intel DX33(5V) DX2-66 __________________________________________________________________ Intel P24D DX4-100(5V) __________________________________________________________________ SGS DX4-100 AMD 5x86-133 Intel DX4-100 AMD DX4-100 (SV8B) Cyrix 5x86-100 (3.
CPU type select CPU Type JP4 JP5 JP6 JP7 JP8 JP11 JP13 JP14 JRN1 JRN2 JRN3 Cyrix 5x86-120 AMD DX4-120 (3.3V)(SV8B) Intel P24D DX4-75 (5V) Cyrix DX2-66 SGS DX2-66 (5V) TI DX2-66 (3.
CPU type select CPU Type JP4 JP5 JP6 JP7 JP8 JP11 JP13 JP14 JRN1 JRN2 JRN3 Cyrix DX2-80 TI DX2-80 (3.3V) AMD DX-40 DX2-80(5V) AMD DX4-100 (NV8T) (3.3 V) Note: 1. AMD 5X86-133 JP20 ON other OFF 2.
Watchdog timer (JP29) Watchdog timer system reset/IRQ15 select (JP29) Reset (default) IRQ15 JP29 COM2 settings for RS-232/422/485 (JP35~39) COM2 settings for RS-232/422/485 (COM2) RS-232 (default) RS-422 JP35 JP36 JP37 JP38 JP39 Battery backup select Battery Backup (default) JP9 15 RS-485
PS/2 mouse setting PS2 Mouse (default) JP15 LCD type control LCD (default) JP28 PCA-6145 User’s Manual 16 EL
CHAPTER 2 Connecting peripherals 17 Chapter 2
Chapter 2 Connecting peripherals This chapter tells how to connect peripherals, switches and indicators to the PCA-6145B/PCA-6145L 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. The following table lists the connectors on the PCA-6145B/PCA-6145L. Table 2.
2.1 Enhanced IDE connectors (CN1) You can attach two IDE (Integrated Device Electronics) drives to the PCA-6145B/PCA-6145L's internal controller. The PCA-6145B/PCA6145L CPU card has an EIDE connector, CN1. Wire number 1 on the cable is red or blue, the other wires are gray. Connect one end to connector CN1 on the CPU card. Make sure that the red (or blue) wire corresponds to pin 1 on the connector (on the right side). See Chapter 1 for help finding the connector.
2.3 Floppy drive connector (CN3) You can attach up to two floppy disk drives to the PCA-6145B/PCA6145L's on-board controller. You can use any combination of 5.25" (360 KB and 1.2 MB) and/or 3.5" (720 KB, 1.44 MB and 2.88 MB) drives. The card comes with a 34-pin daisy-chain drive connector cable. On one end of the cable 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 flatcable connector (usually used for 3.
2.6 Reset switch (JP30) You can connect an external switch to easily reset your computer. This switch restarts your computer as if you had turned off the power, then turned it back on. Install the switch so that it closes the two pins of JP30. 2.7 Hard disk drive LED (JP3) You can connect a LED to connector JP3 to indicate when the HDD is active. Marks on the circuit board indicate LED polarity. 2.
Table 2.2: Serial port connections (COM1, COM2) Connector COM1 COM2 Address RS-232 RS-232/422/485 RS-232 connection (COM1) Different devices implement the RS-232 standard in different ways. If you are having problems with a serial device, be sure to check the pin assignments for the connector. The following table shows the pin assignments for the card's RS-232 port: Table 2.
RS-232/422/485 connection (COM2) COM2 is an RS-232/422/485 serial port. The specific port type is determined by jumper settings JP35 - JP39, as detailed in Chapter 1. The following table shows the pin assignments for COM2. Table 2.
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CHAPTER 3 AWARD BIOS SETUP 25 Chapter 3
Chapter 3 AWARD BIOS Setup 3.1 AWARD BIOS Setup Figure 3.1: Setup program initial screen Award's BIOS ROM has a built-in Setup program that allows users to modify the basic system configuration. This type of information is stored in battery-backed RAM so that it retains the Setup information when the power is turned off. 3.1.1 Entering setup Turning on the computer and pressing immediately will allow you to enter Setup.
3.1.2 Standard CMOS setup Choose the "Standard CMOS Setup" option from the Initial Setup Screen Menu, and the screen below is 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.
3.1.3 BIOS features setup By choosing the "BIOS FEATURES Setup" option from the CMOS SETUP screen menu, the following screen is displayed. This sample scree contains the manufacturer's default values for the PCA-6145B/ PCA-6145L. Virus Warning During and after the system boots up, any attempt to write to the boot sector or partition table of the hard disk drive will halt the system.
You can run the anti-virus program to locate the problem. If Virus Warning is Disabled, no warning message will appear if anything attempts to access the boot sector or hard disk partition. CPU Internal Cache/External Cache Depending on the CPU/chipset design, these options can speed up memory access when enabled. Quick Power On Self Test This option speeds up the Power-On Self Test (POST) conducted as soon as the computer is turned on.
Boot Up NumLock Status The default is "On". On Off Keypad boots up to number keys. Keypad boots up to arrow keys. Boot Up System Speed High Low Sets the speed to high Sets the speed to low IDE HDD Block Mode Enabled Disabled Enable IDE HDD Block Mode. BIOS will detect the block size of the HDD and send a block command automatically. Disable IDE HDD Block Mode Gate A20 option Normal Fast The A20 signal is controlled by the keyboard controller or chipset hardware Default: Fast.
Typematic Delay (msec) When holding down a key, the Typematic Delay is the time interval between the appearance of the first and second characters. The input values (msec) for this category are: 250, 500, 750, 1000. Security Option This setting determines whether the system will boot if the password is denied, while limiting access to Setup. System Setup The system will not boot, and access to Setup will be denied if the correct password is not entered at the prompt.
3.1.4 CHIPSET features setup By choosing the "CHIPSET FEATURES Setup" option from the CMOS Setup screen menu, the following screen is displayed.
3.1.5 Power management setup The power management setup controls the CPU board's "green" features. The following screen shows the manufacturer's default. Power Management This option allows you to determine if the values in power management are disabled, user-defined, or predefined. HDD Power Management You can choose to turn the HDD off after a one of the time interval listed, or when the system is in Suspend mode. If in a power saving mode, any access to the HDD will wake it up.
IRQ Activity IRQ can be set independently. Activity on any enabled IRQ will wake up the system. 3.1.6 Load BIOS defaults "LOAD BIOS DEFAULTS" indicates the most appropriate values for the system parameters for minimum performance. These default values are loaded automatically if the stored record created by the Setup program becomes corrupted (and therefore unusable). 3.1.7 Load setup defaults "LOAD SETUP DEFAULTS" loads the values required by the system for maximum performance. 3.1.
CHAPTER 4 VGA Display & Ethernet Software/ Hardware Configuration
Chapter 4 Display & Ethernet Soft/Hardware Config The PCA-6145B/PCA-6145L system BIOS and custom drivers are located in a 128 Kb, 32-pin (JEDEC spec.) Flash ROM device, designated U11. A single Flash chip holds the system BIOS, VGA BIOS, and Back-up CMOS Data. The display can be configured via software. This method minimizes the number of chips and eases configuration. You can change the display BIOS simply by reprogramming the Flash chip. 4.
45B-STN.BIN (512KB VRAM) Support 640 x 480 color STN DD 8/16-bit displays (Sharp LM64C142) Note: This BIOS does not support simultaneous CRT and flat panel display with 512KB VRAM. 45B-MONO.BIN Supports 640 x 480 dual scan monochrome displays (Sharp LM64P8X/837) 45B-EL.BIN Supports 640 x 480 EL displays (PLANAR EL640480-A Series) CBROM.EXE This program allows you to combine your own VGA BIOS with the System BIOS. 4.
2. At the prompt, type AWDFLASH.EXE and press . The VGA configuration program will then display the following: Figure 4.1: VGA Setup screen 3. At the prompt, type in the BIN file which supports your display. When you are sure that you have entered the file name correctly press . The screen will ask “Do you want to save?” If you wish to continue press Y. If you change your mind or have made a mistake press N to abort and end the setup procedure. 4.
4.3 VGA Win 95 Driver Support These drivers are designed to work with Microsoft Windows 95. You may install these drivers through Windows 95. 4.4 Ethernet Software Configuration The PCA-6145B’s on-board Ethernet interface supports all major network operating systems. I/O addresses and interrupts are easily configured via the DIAG 9008.EXE program. To execute the configuration, to view the current configuration, or to run diagnostics, do the following: 1. Power the PCA-6145B on. Ensure that the DIAG 9008.
4.5 Ethernet Driver Support These drivers are designed to work in a workstation environment under Windows NT, Win 95, or DOS operating system. You may install these drivers for your application.
CHAPTER 5 SVGA Setup 41 Chapter 5
Chapter 5 SVGA Setup The 65545 VGA BIOS supports monochrome LCD, EL, color TFT and STN LCD flat panel displays. It also supports interlaced and non-interlaced analog monitors (VGA color and VGA monochrome) in high-resolution modes while maintaining complete IBM VGA compatibility. Digital monitors (i.e. MDA, CGA, and EGA) are NOT supported. Multiple frequency (multisync) monitors are supported as analog monitors. Both CRT and panel displays can be used simultaneously.
5.
5.3 Driver installation Necessary prerequisites The instructions in this manual assume that you understand elementary concepts of MS-DOS and the IBM Personal Computer. Before you attempt to install any driver or utility you should: know how to copy files from a floppy disk to a directory on the hard disk, understand the MSDOS directory structure, and know how to format a floppy disk.
Changing Display Drivers in Windows To change display drivers in Windows, select the Windows Setup icon from the Main window. You will be shown the current setup configuration. Select Change System Settings from the Option menu. Click on the arrow at the end of the Display line. You will be shown a list of display drivers. Click on the driver you want. Then click on the OK button. Follow the directions to complete the setup.
Step 5: Follow the directions on the screen to complete the setup. In most cases, you may press to accept the suggested option. When Setup is done, it will return to DOS. Type WIN to start Windows with the new display driver. Changing Display Drivers in DOS To change display drivers from DOS, change to the Windows directory and run Setup, repeating steps 4 and 5 from the previous page.
olutions. Using the arrow keys and the key, select the resolutions that are appropriate for your monitor. When all of the desired resolutions have been selected, press to begin the installation. At this point you will be asked for a drive and directory to copy the driver files. Enter the drive and directory that contains the installed AutoCAD R12. If the destination directory does not exist you will be asked for confirmation. When the installation is complete, press any key to continue.
This menu allows you to modify: Display List Enable/Disable Drawing CacheEnable/Disable Use Acad 31 bit space?Yes/No Internal Command EchoEnable/Disable BP Zoom ModeFreeze/Float Regen Mode Incremental/Fast If your previously installed driver is not TurboDLD, you will have to reconfigure the RENDER command the first time you use it. 5.3.3 Lotus 1-2-3 and Lotus Symphony These drivers are designed to work with Lotus 1-2-3 versions 2.0, 2.01 and 2.2, and with Lotus Symphony versions 1.0 and 1.1.
INSTALL Step 3: The Lotus installation program will load and present the installation menu. From this menu, select Advanced Options. From the Advanced Options menu, select Add New Drivers To Library. From the Add New Drivers Menu, select Modify Current Driver Set. From the Modify Driver Set Menu, select Text Display. From the Text Display menu, select one of drivers.
Driver installation Step 1: Place the display driver diskette into drive A. Make A the default drive by typing A: . Run the SETUP program by typing SETUP . Press any key to display a list of supported applications. Use the arrow keys to select VESA Driver Version 1.2 and press . Press the key to select All Resolutions, and press to begin the installation. A default drive and directory path will be displayed.
tion process. A default drive and directory path will be displayed. Use the backspace key to erase this and type in your Word directory. After the files have been installed, press any key to return to the list of supported applications. Press followed by Y to exit to DOS. Step 3: Copy the driver file for the desired resolution that was just installed to SCREEN.VID. 5.4 WordPerfect These drivers are designed to work with WordPerfect 5.0 or 5.1.
Configuring WordPerfect 5.0 for 132 columns Follow these instructions to configure WordPerfect 5.0 for 132 column text mode: Step 1: To use the SETCOL program to set 132 columns and 25 rows, type the following command: SETCOL 132, 25 Step 2: Start WordPerfect. The program will detect the number of rows and columns automatically. If for some reason WordPerfect is unable to adapt to 132 columns by 25 rows, start WordPerfect with the following command: WP /SS=25,132 Configuring WordPerfect 5.
Appendix Programming the Watchdog Timer A
Appendix A Programming the Watchdog Timer A.1 Programming the watchdog timer If you decide to program the watchdog timer, you must write a program which reads I/O port address 443 (hex). The output data is a timer value. You can write it from 01 (hex) to 3F (hex), and the related timer is 1 sec. to 63 sec. After date entry, your program must refresh the watchdog timer by rewriting the I/O port 443 (hex) while simultaneously setting it.
Appendix B Upgrading 55 Appendix B
Appendix B Upgrading B.1 Installing PC/104 modules (CN5,CN6) The PCA-6145B/PCA-6145L card's PC/104 connector lets you attach PC/104 modules. These modules perform the functions of traditional plug-in expansion cards, but save space and valuable slots.
Figure B.1: PC/104 module dimensions (mm)(+/-0.
B.2 Installing DRAM (SIMMs) You can use anywhere from 1 MB to 32 MB of DRAM with your PCA6145B/PCA-6145L. The card provides one 72-pin SIMM (single in-line memory module) socket that accepts from 1 to 32 MB DRAM or EDO RAM. The following table shows the bank assignment for the SIMM socket: Bank SIMM socket (s)Size 1 SIMM1 72-pin You can use 256 KBx32, 256 KBx64, 1 MBx32, 1 MBx64, 4 MBx32 or 4 MBx64 DRAM SIMMs. B.2.1 Memory sizes The board accepts 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, 32 MB and EDO RAM.
Appendix C Detailed system information This appendix contains information of a detailed or specialized nature.
Appendix C Detailed system information Table C.1: Parallel/printer connector (CN4) Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18-25 Signal STROBE DATA 0 DATA 1 DATA 2 DATA 3 DATA 4 DATA 5 DATA 6 DATA 7 - ACKNOWLEDGE BUSY PAPER EMPTY + SELECT - AUTO FEED - ERROR - INIT PRINTER - SELECT INPUT GROUND Table C.2: HDD connector (CN1) Pin no. 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 PCA-6145 User’s Manual Signal - RST D7 D6 D5 D4 D3 D2 D1 D0 GND N.C. IOW IOR IORDY N.C. IRQ Pin no.
Pin no. 33 35 37 39 Signal A1 A0 CSO -ACT Pin no. 34 36 38 40 Signal N.C. A2 CS1 GND Table C.3: FDD connector (CN3) Pin no. 1-33 (odd) 2 4, 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 Signal GROUND HIGH DENSITY UNUSED INDEX MOTOR ENABLE A DRIVER SELECT B DRIVER SELECT A MOTOR ENABLE B DIRECTION STEP PULSE WRITE DATA WRITE ENABLE TRACK 0 WRITE PROTECT READ DATA SELECT HEAD DISK CHANGE Table C.
C.0.1 VGA display connector (J2) Table C.5: PCA-6145 CRT display connector Pin 1 2 3 4 5 6 7 8 C.0.2 Signal Pin RED 9 GREEN 10 BLUE 11 N/C 12 GND 13 GND 14 GND 15 GND Signal N/C GND N/C N/C H-SYNC V-SYNC N/C Flat panel display connector (CN2) mini pin header Table C.
C.0.3 RS-232 connections (COM1, COM2) Different devices implement the RS-232 standard in different ways. If you are having problems with a serial device, be sure to check the pin assignments for the connector. The following table shows the pin assignments for the card's RS-232 port: Table C.
Table C.
Table C.9: System I/O ports Addr.
Table C.
Table C.11: DMA channel assignments Channel 0 1 2 3 4 5 6 7 Function Spare (8-bit transfer) SDLC (8-bit transfer) Floppy disk (8-bit transfer) Spare (8-bit transfer) Cascade for DMA controller 1 Spare (16-bit transfer) Spare (16-bit transfer) Spare (16-bit transfer) Table C.
Table C.
Appendix D POST LEDs 69 Appendix D
Appendix D Detailed system information Whenever you start up your system, the CPU card runs a series of programs to test and initialize board hardware. If the routines encounter an error in during the tests, you will either hear a few short beeps or see an error message on the screen. There are two kinds of errors: fatal and nonfatal. The system can usually continue the boot up sequence with nonfatal errors.
D.1 POST LEDs Before the BIOS performs each system test, it writes a checkpoint code to I/O address 80H. If the test fails, the code will stay in memory. You can read the code and determine which test has failed. The PCA-6145B/PCA-6145L’s POST LED indicators make this process extremely easy. You don’t need any special diagnostic tools, you just read the POST code from the LEDs. The table below shows how to read the LEDs, a series of eight LEDs located in the top left-hand corner of the board.
Code 01 Name Processor test 1 02 Processor test 2 03 Initialize chips 04 Test memory Description of check-point Processor status (IFLAGS) verification tests the following processor status flags, carry, zero, sign, BIOS overflow. It will set each of these flags, verify that they are set, then turn each flag off and verify it is off. Read, write, verify all CPU registers except SS, SP, and BP with data pattern FF and 00. Disable NMI, PLE, ALE, UEL, SQWV. Disable video, parity checking, DMA.
Code 0C Name Initialize keyboard 0D Initialize video interface 0E Test video memory 0F Test DMA controller 0 Description of check-point detect type of keyboard controller (optional). Set num_lock status. Detect CPU clock. Read interface CMOS location 14h to find out type of video in use. Detect and initialize video adaptor. Test video memory, write sign-on message to screen. Set up shadow RAM-enable according to setup. BIOS checksum test. Keyboard detection and initialization.
Code 32 Name Test EISA extended memory 33-3B 3C 3D Reserved Setup enabled Initialize and install mouse Set up cache controller Virus protect 3E 40 41 42 43 44 45 46-47 4E Description of check-point If EISA mode flag is set then test EISA memory found in slot initialization. Note: this will be skipped in ISA mode and can be ‘skipped” with ESC key in EISA mode.
Code 62 Name Set numlock 63 B0 Boot attempt Spurious B1 Unclaimed NMI BE BF Chipset default initialization Chipset initialization C0 C1 Turn off chipset cache Memory presence test C5 Early shadow C6 E1-EF FF Cache presence test Setup pages Boot Description of check-point Set numlock status according to setup. Set low stack boot via INT 19h. If interrupt occurs in protected mode. If unmasked NMI occurs, display "Press F1 to disable NMI, F2 to reboot".
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