Compaq Portable PC Card Support for Microsoft Windows NT 4.0
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Second Edition (February 1998)
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First Edition (October 1997)
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0298/B
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WHITE PAPER (cont.)
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PLATFORM PC CARD SUPPORT
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NOTE:
Direct enablers are basic
software drivers provided by a
PC Card vendor. These drivers
allow the peripheral to be used
under native Windows NT 4.0.
Contact your PC Card vendor
directly for information about the
level of Windows NT 4.0 support
offered.
Microsoft Windows NT 4.0 is pre-installed on select models within the Armada 1500, Armada
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7300, Armada 7700 and Armada 7800 families. The operating system is supported on all models
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within the Armada 1500, Armada 4100, Armada 4200, Armada 7300, Armada 7700, Armada 7800
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and LTE 5000 families. Table 1 summarizes which versions of CardWare® 5.0 are supported on
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each portable family. Note that PC Card features inherently supported by Windows NT 4.0 are
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supported across all product families (see the section titled Supported PC Card Featuresfor more
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information). Using a PC Card under Windows NT 4.0 without CardWare® 5.0 requires basic
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software drivers for the PC Card peripheral called direct enablers1 and that the PC Card be inserted
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into the slot prior to turning on the notebook. Using a direct enabler offers support for a specific
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PC Card and only for a limited set of features and functionality when compared with PC Cards
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operating under CardWare® 5.0. Hot PC Card insertion, auto-configuration and CardBus are
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examples of features not supported through the use of a direct enabler, but are supported by
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CardWare. See the section titled Supported PC Card Features & Card Types for more information
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about PC Card features supported under CardWare® 5.0 versus those offered by the native
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operating system.
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SUPPORTED PLATFORMS
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Supported Platforms
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LTE 5000 Familyüûü
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Armada 4100 Familyüûü
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Armada 4200 Familyüûü
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Armada 1500 Familyüüü
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Armada 7300 Familyüüü
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Armada 7700 Familyüüü
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Armada 7800 Familyüûü
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Table 1 - PC Card support by Compaq portable computer family
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SUPPORTED PC CARD FEATURES
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CardWare® 5.0 greatly expands the set of PC Card features over those inherently offered by
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Windows NT 4.0. Table 3 summarizes major features by specific versions of CardWare® 5.0 and
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compares this expanded feature set with the limited set offered by Windows NT 4.0. The following
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is a discussion of key areas where CardWare® 5.0 provides additional value and makes PC Card
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technology, namely CardBus and enhanced power management, more usable for Compaq portable
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customers.
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CardBus Support
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One of the key hardware technology advancements introduced with the Armada 1500, Armada
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4200, Armada 7300, Armada 7700 and Armada 7800 families is CardBus support, which paves the
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way for higher performance PC Card devices. CardBus is based on the widely accepted PCMCIA
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Association industry standard for 32-bit PC Cards. These devices are able to take advantage of
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Due to the way direct enablers are designed, they can compromise system integrity and render other PC Cards unusable.
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Compaq recommends caution when using direct enablers.
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Windows NT 4.0 Native
PC Card Support
CardWare® 5.0 for
Windows NT 4.0 (v2.0x)
CardWare® 5.0 for
Windows NT 4.0 (v2.1x)
WHITE PAPER (cont.)
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internal bus speeds that can be as much as four to six times faster than with 16-bit PC Cards in
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certain configurations. CardBus devices continue to use the same, well known, PC Card form
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factor and support many of the features that make PC Cards ideally suited to the portable platform
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NOTE:
Standby and hibernation are not
fully supported when connected to
a local area network or using a
PC Card SCSI interface. Compaq
recommends removing these types
of devices from the PC card slots
before entering either of these
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such as hot swapping support.
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CardBus is not inherently supported by Windows NT 4.0, but is supported on Compaq portable
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platforms through CardWare® 5.0.
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CARDBUS FEATURES & BENEFITS
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FeatureBenefit
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Uses PC Card form factor
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3.3 volt power consumptionExtends battery life in most configurations.
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33MHz PCI Bus
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Bus mastering capabilityReduces processor overhead improving overall system performance.
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Table 2 - CardBus features & benefits summary
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Enhanced Power Management
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Standby and hibernation states are important power saving features portable users rely on to
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conserve battery power. Under Windows NT 4.0 PC Card devices are not able to respond to power
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management events such as entering standby mode. As such, power management functionality can
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lead to unexpected results when PC Cards are in use under native Windows NT 4.0. The way a
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particular PC Card behaves in response to power management events depends to a large extent on
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the direct enabler provided by the PC Card vendor. Contact your PC Card vendor directly for more
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information should you have a need to use a particular device without the benefit of
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CardWare® 5.0.
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Another key feature CardWare® 5.0 delivers is full support for the Advanced Power Management
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(APM) specification, version 1.2. PC Cards used in conjunction with CardWare® 5.0 operate more
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reliably when responding to power management events.
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The only notable exceptions to the power management support with PC Cards are local area
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networking (LAN) and SCSI interfaces. These types of devices typically do not support standby or
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hibernation modes with or without CardWare® 5.0. This limitation is not the result of any
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shortcoming in CardWare® 5.0, but rather lack of a widely accepted standard for developing power
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management-aware software drivers.
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The PCMCIA is an industry association responsible for developing PC Card standards. The
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Association recently ratified an addendum to the PC Card standard that defined a workable
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solution for to more reliable PC Card operation in response to power management events. This
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addendum, known as Proposition 187 – The NT Bindings Proposal is new and many PC Card
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vendors have yet to release updated software drivers that incorporate this latest addition to the
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PCMCIA specification. Customers who require the highest levels of reliability and performance on
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Compaq portable platforms should insist on PC Card vendors whose products have been designed
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to meet the PCMCIA specification. For more information on selecting PC Card solutions
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recommended by Compaq, refer to the section titled Compaq PC Card Solutions Program.
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Provides the benefits of higher performance in the convenient form factor users have come to
expect from the PC Card standard. Portable platforms with PC Card slots that are CardBus
enabled also allow backward compatibility for 16-bit PC Cards.
Provides up to 132MB per second peak transfer rates to support high performance peripherals
such as 100Mbps Ethernet network interface cards and up to 40Mbps Ultra SCSI PC Card
interfaces.
WHITE PAPER (cont.)
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Extended Feature Set
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Beyond CardBus support and enhanced power management, CardWare® 5.0 adds a number of
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features not included in basic PC Card support provided by Windows NT 4.0. This extended
NOTE:
The Supported Features table
uses “l” symbol to denote
features that are supported with
known exceptions or limitations.
Refer to the footnotes for more
detail.
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feature set greatly improves the overall usability of PC Card devices on Compaq portable products.
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Table 3 summarizes all major PC Card features supported on Compaq portable platforms using
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Windows NT 4.0. The table compares those features provided with CardWare® 5.0 and compares
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with the basic PC Card feature set provided by Windows NT 4.0
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SUPPORTED FEATURES
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Supported Features
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PC Card-16üüü
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32 Bit CardBus Cards
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APM 1.1üûû
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APM 1.2ûüü
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Multi Volt Cardsüüü
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5.0 Volt Cardsüüü
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3.3 Volt Cardsûüü
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Socket Namingûüü
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Socket Power on/offûûü
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Windows System Tray Iconüûü
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Configuration on Card Insertion &
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Automatic Application Launch
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Hot PC Card Insertionûüü
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Hot PC Card Removal
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Recognition Beepsûüü
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Docking Station PC Card Slot Supportüüü
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Ring Resume
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Standby with PC Cards
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Under CardWare® 5.0, hot card removal and auto card configuration requires drivers that specifically support these
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features. Customers should contact their CardBus PC Card vendor for information about the latest drivers.
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Automatic configuration under native Windows NT 4.0 is only supported with ATA PC Card devices and only when the
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device is inserted prior to power-on.
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Automatic configuration under CardWare® 5.0 version 2.0x is not supported with LAN, SCSI or CardBus PC Cards.
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Automatic configuration of CardBus PC Cards under CardWare® 5.0 version 2.1 requires software driver support from the
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card vendor. Contact your PC Card vendor directly for information on level of support for automatic configuration.
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Hot PC Card removal under CardWare® 5.0 is supported for modem, ATA, SRAM and Flash PC Cards. Hot removal for
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LAN, SCSI and CardBus type PC Cards is only available under CardWare® 5.0 if there is card specific driver support for
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this feature. Contact your PC Card vendor directly for information on the level of support for hot removal.
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Windows NT 4.0 does not support ring resume.
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When resuming from standby mode, behavior may vary depending on the type of PC Card inserted and the level of power
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management support by the card driver.
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Windows NT 4.0 Native
PC Card Support
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CardWare® 5.0 for
Windows NT 4.0 (v2.0x)
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CardWare® 5.0 for
Windows NT 4.0 (v2.1x)
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WHITE PAPER (cont.)
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Supported Features
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Hibernation with PC Cards
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Table 3 - CardWare® 5.0 Feature Comparison by Version
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SUPPORTED PC CARD TYPES
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Table 4 summarizes the various types of PC Card devices supported by CardWare® 5.0 as
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compared with those supported by native Windows NT 4.0. Note that all card types referenced in
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the table, with the exception of CardBus PC Cards, refer to PC Card-16 (i.e. 16-bit) devices.
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CardBus PC Cards are generally restricted to LAN, SCSI and emerging technologies such as video
Table 4 - Supported PC Cards - Windows NT 4.0 versus CardWare® 5.0
CARDWARE
CardWare® 5.0 is pre-installed on select models within the Armada 1500, Armada 7300, Armada
7700 and Armada 7800 families. It is also available on the Compaq Software CD specific to each
Armada notebook computer family. For a small fee, this CD is available through Compaq
Customer Service & Support and includes all software for your Armada notebook. For customers
who only require CardWare® 5.0 and would prefer not receive it on CD, Compaq Customer Service
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When resuming from hibernation, behavior may vary depending on the type of PC Card inserted and the level of power
management support by the card driver.
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LAN cards under CardWare® 5.0 do not support hot removal without card-specific software driver support.
Consequently, resuming from standby or hibernation mode may lead to unexpected results. Compaq does not recommend
using standby and hibernation with a LAN card under CardWare® 5.0.
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SCSI cards under CardWare® 5.0 do not support hot removal without card-specific software driver support.
Consequently, resuming from standby or hibernation mode may lead to unexpected results. Compaq does not recommend
using standby and hibernation with a SCSI card under CardWare® 5.0.
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FTL devices formatted under Windows 95 and CardWare® 5.0 under Windows NT 4.0 on Compaq portable platforms are
fully interoperable.
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Multi-function PC Cards requires PC Card specific software driver support for Windows NT 4.0 with CardWare® 5.0.
Contact your PC Card vendor directly for information about Windows NT 4.0 support.
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®
5.0 AVAILABILITY
Windows NT 4.0 Native
PC Card Support
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Windows NT 4.0 Native
PC Card Support
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üüü
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CardWare® 5.0 for
Windows NT 4.0 (v2.0x)
CardWare® 5.0 for
Windows NT 4.0 (v2.0x)
CardWare® 5.0 for
Windows NT 4.0 (v2.1x)
CardWare® 5.0 for
Windows NT 4.0 (v2.1x)
WHITE PAPER (cont.)
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& Support is also able to send the application on diskette. Finally, CardWare® 5.0 Version 2.1x will
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be made available on the Compaq Web site at http://www.compaq.com.
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Tip:
The PC Card Solutions program
can be reached on the Compaq
Web site at