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National Instruments MXIbus VME-AT2000 Getting Started

National Instruments MXIbus VME-AT2000 Getting Started

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Getting Started with Your
™
VME-AT2000 and the NI-VXI
Software for MS-DOS
bus
August 1994 Edition
Part Number 320332B-01
© Copyright 1991, 1994 National Instruments Corporation.
All Rights Reserved.

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Summary of Contents for National Instruments MXIbus VME-AT2000

  • Page 1 Getting Started with Your ™ VME-AT2000 and the NI-VXI Software for MS-DOS August 1994 Edition Part Number 320332B-01 © Copyright 1991, 1994 National Instruments Corporation. All Rights Reserved.
  • Page 2 National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 Technical support fax: (800) 328-2203 (512) 794-5678 Branch Offices: Australia (03) 879 9422, Austria (0662) 435986, Belgium 02/757.00.20, Canada (Ontario) (519) 622-9310, Canada (Québec) (514) 694-8521, Denmark 45 76 26 00, Finland (90) 527 2321, France (1) 48 14 24 24, Germany 089/741 31 30, Italy 02/48301892, Japan (03) 3788-1921, Netherlands 03480-33466, Norway 32-848400, Spain (91) 640 0085, Sweden 08-730 49 70, Switzerland 056/20 51 51, U.K.
  • Page 3 Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malfunctions, or service failures caused by owner's failure to follow the National Instruments installation, operation, or maintenance instructions;...
  • Page 4 Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all traditional medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used when National Instruments products are being used.

  • Page 5: Table Of Contents

    ........... 3-1 NI-VXI Software Overview...................3-1 Main Programs and Files ...................3-1 Additional Programs and Files................3-2 Installing the Software ....................3-5 Modifying the AUTOEXEC.BAT File..............3-6 Configuring the NI-VXI Software .................3-7 Running VXIEDIT.....................3-7 Configuration Editor ..................3-9 © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 6 Memory Area Used by Another Device ............B-4 Memory Area Used by Expanded-Memory Manager or Emulator ....B-4 Problems with Mouse.....................B-5 Problems with MXIbus Cable..................B-5 Appendix C Customer Communication ....................C-1 Glossary ........................Glossary-1 VME-AT2000/NI-VXI MS-DOS Getting Started viii © National Instruments Corporation...
  • Page 7 Table 2-2. Possible Base I/O Address Settings for the AT-MXI.......... 2-5 Table 3-1. Logical Address Configuration Characteristics ..........3-10 Table 3-2. Bus Configuration Characteristics............... 3-14 Table 3-3. Device Configuration Characteristics ..............3-16 © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 8: About This Manual

    About This Manual This manual contains instructions for installing and configuring the National Instruments VME-AT2000 interface kit. This manual is meant to be used with the NI-VXI C Software Reference Manual for VME, the NI-VXI Software Reference Manual for BASIC, and the NI-VXI DOS Utilities Reference Manual.

  • Page 9: Conventions Used In This Manual

    NI-VXI bus interface software on the AT-MXI platform. • Appendix C, Customer Communication, contains forms you can use to request help from National Instruments or to comment on our products and manuals. • The Glossary contains an alphabetical list and description of terms used in this manual, including abbreviations, acronyms, metric prefixes, mnemonics, and symbols.

  • Page 10: Related Documentation

    VXI-6, VXIbus Mainframe Extender Specification, Rev. 1.0, VXIbus Consortium Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop using our products, and we want to help if you have problems with them.

  • Page 11: Chapter 1 Introduction

    You may have ordered your kit without this cable so that you could order a different type or length of MXIbus cable. Refer to the Optional Equipment section. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 12: Optional Equipment

    Introduction Chapter 1 Optional Equipment Contact National Instruments for ordering information for any of the following optional equipment. • VXI-MXI standard VXIbus mainframe extender kit • VXI-MXI enhanced VXIbus mainframe extender kit • VME-MXI standard VXIbus chassis extender kit • VME-MXI enhanced VXIbus chassis extender kit •...

  • Page 13: Hardware Configuration And Installation

    Avoid touching any of the IC components or connectors. Inspect them for loose components or any other sign of damage. Notify National Instruments if either board appears damaged in any way. Do not install equipment that appears to be damaged.

  • Page 14: Step 2. Configure The At-Mxi Hardware

    Step 2. Configure the AT-MXI Hardware Figure 2-1 shows the location of the AT-MXI configuration jumpers and switches. Art not available in PDF version of document. Figure 2-1. AT-MXI Parts Locator Diagram VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 15: Switch And Jumper Settings

    I/O address space. If you change the base I/O address of the AT-MXI, you must make a corresponding change to the AT-MXI configuration software as described in the Configuring the NI-VXI Software section of Chapter 3 of this manual. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 16: Figure 2-2. Base I/O Address Switch Settings

    Switch Set to Base I/O Address hex 100 Binary Hex ON=0 OFF=1 ON=0 OFF=1 OFF=1 b. Switch Set to Default Setting (Base I/O Address hex 340) Figure 2-2. Base I/O Address Switch Settings VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 17: Table 2-2. Possible Base I/O Address Settings For The At-Mxi

    2C0 - 2DF 2E0 - 2FF 300 - 31F 320 - 33F 340 (default) 340 - 35F 360 - 37F 380 - 39F 3A0 - 3BF 3C0 - 3DF 3E0 - 3FF © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 18 14 for the hard disk drive controller. Other interrupt levels might be used by standard logic devices on the motherboard so check your computer documentation before changing interrupt levels. VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 19: Figure 2-3. Board And Mxibus Interrupt Jumper Settings

    Figure 2-3. Board and MXIbus Interrupt Jumper Settings To change to another interrupt level, remove the appropriate jumper from its current position and place it on the new posts. Figure 2-3b shows the board interrupt level changed to IRQ5. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 20: Dma Channel Selection

    DMA with your AT-MXI. The slave-mode DMA channel is necessary only for setting up shared access to PC AT resource from external MXIbus devices. If you intend to communicate with VME devices using a shared VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...
  • Page 21 Remember that the jumper positions should be identical on both the W1 and W2 arrays. Figure 2-4a shows the factory default DMA channel setting of the AT-MXI, with master-mode DMA Channel 6 and slave-mode DMA Channel 3. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 22: Figure 2-4. Dma Channel Settings

    Remember to make a corresponding change in the system software to enable the new DMA channels. Figure 2-4b displays the jumper position for selecting master-mode DMA Channel 7 and slave-mode DMA Channel 0. VME-AT2000/NI-VXI MS-DOS Getting Started 2-10 © National Instruments Corporation...

  • Page 23: Step 3. Install The At-Mxi Hardware

    2. Remove the top cover or access port to the PC AT I/O bus. 3. Select any available 16-bit full-length PC AT expansion slot. The 16-bit expansion slots have two card-edge receptacle connectors. © National Instruments Corporation 2-11 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 24: Figure 2-5. At-Mxi Installed In A Computer

    Figure 2-5 shows an AT-MXI installed in a PC AT with a MXIbus cable attached. AT-MXI Board MXI Connector ISA Bus Card Edge Connector Cut-outs ISA Bus Slot (16 -bit) Card Guides Figure 2-5. AT-MXI Installed in a Computer VME-AT2000/NI-VXI MS-DOS Getting Started 2-12 © National Instruments Corporation...

  • Page 25: Step 4. Configure The Vme-Mxi Hardware

    VME-MXI in the same chassis. If this is the case, refer to the VME-MXI User Manual that came with your additional VME-MXI interface for more information. Art not available in PDF version of document. Figure 2-6. VME-MXI Parts Locator Diagram © National Instruments Corporation 2-13 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 26: Figure 2-7. Vme-Mxi With Intx Parts Locator Diagram

    VME-MXI modules with or without the INTX option. For more information about configuring modules with the INTX option, refer to the VME-MXI User Manual. Art not available in PDF version of document. Figure 2-7. VME-MXI with INTX Parts Locator Diagram VME-AT2000/NI-VXI MS-DOS Getting Started 2-14 © National Instruments Corporation...

  • Page 27: Front Panel Features

    System Controller. To configure the VME-MXI as a non-VMEbus System Controller, change slide switch S5 as depicted in Figure 2-8(b). a. VMEbus System b. Not VMEbus Controller (Default Setting) System Controller Figure 2-8. VMEbus System Controller Selection © National Instruments Corporation 2-15 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 28: Vme Address

    W2, W3, W4, W5, and W6. You may want to change request levels to change the priority of the VME-MXI request signal. For more information, refer to the VMEbus specification. VME-AT2000/NI-VXI MS-DOS Getting Started 2-16 © National Instruments Corporation...

  • Page 29: Figure 2-9. Vme-Mxi Vmebus Requester Jumper Settings

    • • • • • • • • • • • • • • • • d. Level 0 Requester c. Level 1 Requester Figure 2-9. VME-MXI VMEbus Requester Jumper Settings © National Instruments Corporation 2-17 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 30: Vmebus Timeout Value

    (Default Setting) • • • • • • • • • • • • • • • • c. 400 µsec BTO d. Disable BTO Figure 2-10. VMEbus Timeout Value Selection VME-AT2000/NI-VXI MS-DOS Getting Started 2-18 © National Instruments Corporation...

  • Page 31: Step 5. Install The Vme-Mxi Hardware

    4. Tighten the retaining screws on the top and bottom edges of the front panel. 5. Check the installation. 6. Connect the cables as described in the following section before restoring power. 7. Replace or close any doors or covers to the chassis. © National Instruments Corporation 2-19 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 32: Step 6. Connect The Mxibus Cable

    Be sure to tighten the screw locks to ensure proper pin connection. See Figure 2-11. External Computer VME Chassis MXI Cable AT-MXI Interface VME-MXI Figure 2-11. MXIbus Single-Ended Cable Configuration VME-AT2000/NI-VXI MS-DOS Getting Started 2-20 © National Instruments Corporation...

  • Page 33: Polarized Cables

    When the MXIbus cable is properly connected, turn on the VME chassis and then the PC AT computer. After all devices are powered on and running properly, you may run the Resource Manager software utility to configure your system. © National Instruments Corporation 2-21 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 34: Ni-Vxi Software Installation And Configuration

    AT-MXI is automatically initialized at startup. The configuration settings can be modified using the VXIEDIT.EXE program. • RESMAN.EXE is the National Instruments multimainframe Resource Manager. RESMAN.EXE may be executed only after VXIINIT.EXE has been run. • VIC.EXE is an interactive control program that executes functions you enter from the keyboard.

  • Page 35: Additional Programs And Files

    In VME systems, however, interrupts are statically configured. This file also contains interrupt mapping information that can be used in a VME system but only in a multimainframe situation. VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...
  • Page 36 WS.H contains parameter and return values for the Commander and Servant Word Serial functions. This file is useful in VXI systems but is not applicable for VME systems. • NIVXI.INC is the include file for the Microsoft QuickBASIC Language interface. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 37 MKQLB*.BAT and MKQLB*.LNK are batch and response files used to generate a QuickBASIC library for the desired version. • MKAPPBC.BAT and MKAPPBC.LNK are batch and response files that contain an example of how to build a BASIC application using NI-VXI functions. VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 38: Installing The Software

    If INSTALL detects a previous installation of the NI-VXI software, it will prompt you to determine whether to delete or overwrite the previous version, or to provide an alternate path in which to install the new version. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 39: Modifying The Autoexec.bat File

    Notes: After you execute INSTALL, you should reboot your machine (or at least run AUTOEXEC.BAT) to make your system aware of the NI-VXI directory. Once the NI-VXI package is installed, run VXIINIT.EXE and then RESMAN.EXE . VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 40: Configuring The Ni-Vxi Software

    (*.CFG), table files (*.TBL), and help files (*.HLP) in its execution. Be sure that the environment variable NIVXIPATH is set to the destination directory of the NI-VXI software for proper execution. The default destination directory pathname used by the program is C:\NIVXI. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 41: Figure 3-1. Vxiedit Main Menu

    VXI systems and are not used in VME systems (VXI is a superset of VME). The Interrupt Configuration Editor and Utility Bus Configuration Editor can be used in VME systems, but only in multimainframe system configurations. VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 42: Configuration Editor

    You can exit the program at any time without saving any changes you have made by selecting Abort. Logical Address Configuration Figure 3-2 shows the Logical Address Configuration Editor (VXIla) menu. Figure 3-2. AT-MXI Logical Address Configuration Editor © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 43: Table 3-1. Logical Address Configuration Characteristics

    AT-MXI board. The NONE option can be selected with any jumper settings. Range = 0, 1, 2, 3, 5, 6, 7, NONE Note: This field is currently disabled. NONE (continues) VME-AT2000/NI-VXI MS-DOS Getting Started 3-10 © National Instruments Corporation...
  • Page 44 PC I/O space over the VMEbus. Range = 64 KB, 32 KB, 16 KB, 8 KB, 4 KB, 2 KB, 1 KB, 512 bytes, DISABLE DISABLE (continues) © National Instruments Corporation 3-11 VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 45 Time in seconds to wait after power-up or reset Delay before configuring the VME hardware interface and checking for any VXIbus devices residing in the system. Range = 0 to 65535 s VME-AT2000/NI-VXI MS-DOS Getting Started 3-12 © National Instruments Corporation...

  • Page 46: Bus Configuration

    Chapter 3 NI-VXI Software Installation and Configuration Bus Configuration Figure 3-3 shows the Bus Configuration Editor (VXIbus) menu. Figure 3-3. AT-MXI Bus Configuration Editor © National Instruments Corporation 3-13 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 47: Table 3-2. Bus Configuration Characteristics

    NONE option is selected, the same interrupt level as used for AT-MXI board interrupts is used for this interrupt. Range = 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, or NONE NONE VME-AT2000/NI-VXI MS-DOS Getting Started 3-14 © National Instruments Corporation...

  • Page 48: Device Configuration

    Chapter 3 NI-VXI Software Installation and Configuration Device Configuration Figure 3-4 shows the Device Configuration Editor (VXIdev) menu. Figure 3-4. AT-MXI Device Configuration Editor © National Instruments Corporation 3-15 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 49: Table 3-3. Device Configuration Characteristics

    The units are in hundreds of microseconds. Note: If the MXIbus System Controller field in the Bus Configuration Editor is set to NO, this field is ignored. (1.0 ms) VME-AT2000/NI-VXI MS-DOS Getting Started 3-16 © National Instruments Corporation...

  • Page 50: Non-Vxi Device Editor

    VME-MXI in your kit is 1). Next, assign it a device name, manufacturer name, and model name. Finally, set its A16 memory base and size fields according to its memory requirements, and set the InSystem? field. © National Instruments Corporation 3-17 VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 51: Exiting Vxiedit And Reinitializing The Hardware

    QBNIVXI.LIB is the file that contains the NI-VXI function library for the Microsoft QuickBASIC interface. This is used to generate QBNIVXI.QLB, the Microsoft QuickBASIC library. The corresponding include files *.INC are in the INCLUDE subdirectory in the distribution software. VME-AT2000/NI-VXI MS-DOS Getting Started 3-18 © National Instruments Corporation...

  • Page 52: Appendix A Specifications

    Capability Code Description Can function as an AT Alternate Master LOCK Can lock the AT bus for indivisible transfers DMA16 Supports D08 or D16 DMA transfers Can interrupt on the PC AT bus © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 53 (339.72 mm by 121.92 mm) Connectors Single fully implemented MXIbus connector Slot Requirements Single AT (ISA) slot MTBF Contact Factory Electrical Source Typical Direct Current (max) +5 VDC 3.3 A 4.4 A VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...
  • Page 54 840 ns Read 840 ns Block Write 590 ns Block Read 590 ns Other Transfer Type Transfer Rate Daisy-Chain Delay 120 ns (Passing GIN to GOUT or GOUT generation from System Controller) © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 55 Master Mode Read/Modify/Write SRMW Slave Mode Read/Modify/Write Prioritized arbitration Release on Request bus requester Interrupt Handler Interrupt Requester ROAK Release on Acknowledge interrupter Bus Timeout Optional VMEbus System Controller IACK IACK daisy-chain driver VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...
  • Page 56 0° to 70° C operating; -40° to 85° C storage Relative Humidity 10% to 90% noncondensing, operating; 0% to 95% noncondensing, storage Emissions FCC Class A Safety Not applicable Shock and Vibration Not applicable © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 57 Contact Factory Electrical Source Typical Maximum +5 VDC 5.25 A 7.0 A Timing Master Mode Transfer Type Transfer Rate Write 675.5 ns Read 625.5 ns Block Write 320 ns Block Read 270 ns VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...
  • Page 58 381 ns Read 381 ns Block Write 238 ns Block Read 238 ns Other Transfer Type Transfer Rate Daisy-Chain Delay 120 ns (Passing GIN to GOUT or GOUT generation from System Controller) © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 59: Appendix B Troubleshooting

    MXI cable. If you are unable to resolve your problem, please fill out the appropriate forms in Appendix C, Customer Communication, and contact National Instruments. Problems with VXIINIT This section discusses what to do if running the VXIINIT initialization program results in an error message or causes the system to hang.

  • Page 60: Vxiinit Could Not Find The At-Mxi

    2. The NIVXIPATH variable may be pointing to the wrong directory. The path should be set in the AUTOEXEC.BAT file to point to the root directory of the NI-VXI files. By default, this directory is C:\NIVXI. VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 61: Error Writing Log File

    NONE, and this value cannot be modified. If you are using a version of the NI-VXI software for the AT-MXI prior to Version 3.10, ensure that this value is set to NONE. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 62: Problems With Resman

    Master Window address range. The following examples show how to prevent various expanded-memory managers or emulators from using upper memory within the default Master Window address range of D000h to DFFFh. VME-AT2000/NI-VXI MS-DOS Getting Started © National Instruments Corporation...

  • Page 63: Problems With Mouse

    The following symptoms can indicate a problem with the MXIbus cable. • RESMAN finds the AT-MXI board at Logical Address 0 but does not detect the VXI/VME chassis. • RESMAN previously worked, but now produces errors. © National Instruments Corporation VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 64 AT-MXI and the VME-MXI are set accordingly. 3. If the cabling problem is not apparent, try another MXIbus cable if you have one available. If this solves the problem, contact National Instruments for repair information. VME-AT2000/NI-VXI MS-DOS Getting Started...

  • Page 65: Appendix C Customer Communication

    Filling out a copy of the Technical Support Form before contacting National Instruments helps us help you better and faster. National Instruments provides comprehensive technical assistance around the world. In the U.S. and Canada, applications engineers are available Monday through Friday from 8:00 a.m. to 6:00 p.m.
  • Page 66 National Instruments for technical support helps our applications engineers answer your questions more efficiently. If you are using any National Instruments hardware or software products related to this problem, include the configuration forms from their user manuals. Use additional pages if necessary.
  • Page 67 Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.
  • Page 68 • VME-MXI Installed in Slot 1? __________________________________________________ • VME-MXI is VMEbus System Controller? __________________________________________________ • VME-MXI Address __________________________________________________ • VME-MXI VMEbus Request Level __________________________________________________ • VMEbus BTO Timeout Value __________________________________________________ • VME-MXI Hardware Revision __________________________________________________ • AT-MXI Hardware Revision __________________________________________________ Other Products •...
  • Page 69 Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. ™ Title: Getting Started with Your VME-AT2000 and the NI-VXI Software for MS-DOS...

  • Page 70: Glossary

    Character code that identifies a specific location (or series of locations) in memory. address modifier One of six signals in the VMEbus specification used by VMEbus masters to indicate the address space in which a data transfer is to take place. © National Instruments Corporation Glossary-1 VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 71 A device that is capable of requesting the Data Transfer Bus (DTB) for the purpose of accessing a slave device. Celsius VME-AT2000/NI-VXI MS-DOS Getting Started Glossary-2 © National Instruments Corporation...
  • Page 72 A MXIbus device responds at Logical Address 255 during a priority select cycle. The Resource Manager subsequently assigns it a new logical address, which the device responds to until powered down. © National Instruments Corporation Glossary-3 VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 73 Hexadecimal; the numbering system with base 16, using the digits 0 to 9 and letters A to F. hertz; cycles per second. Integrated Circuit IEEE Institute of Electrical and Electronics Engineers IEEE 1014 The VMEbus specification VME-AT2000/NI-VXI MS-DOS Getting Started Glossary-4 © National Instruments Corporation...
  • Page 74 Message-Based An intelligent device that implements the defined VXIbus registers and device communication protocols. These devices are able to use Word Serial Protocol to communicate with one another through communication registers. © National Instruments Corporation Glossary-5 VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 75 Register-Based devices are typically controlled by Message-Based devices via device-dependent register reads and writes. RESMAN The name of the National Instruments Resource Manager in NI-VXI bus interface software. See Resource Manager. Resource Manager A Message-Based Commander located at Logical Address 0, which...
  • Page 76 System Controller functions, including clock sourcing and arbitration for data transfers across the backplane. Installing such a device into any other slot can damage the device, the VMEbus backplane, or both. VMEbus Extensions for Instrumentation © National Instruments Corporation Glossary-7 VME-AT2000/NI-VXI MS-DOS Getting Started...
  • Page 77 Word Serial The simplest required communication protocol supported by Message- Protocol Based devices in the VXIbus system. It utilizes the A16 communication registers to transfer data using a simple polling handshake method. VME-AT2000/NI-VXI MS-DOS Getting Started Glossary-8 © National Instruments Corporation...

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