Device Drivers for Windows 95 and Windows 98

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Installing the SDMS™ Drivers:
SYMC8XX.MPD, SYM_HI.MPD, and SYM_U3.MPD

This document provides installation instructions and includes these topics:

Windows 95 and Windows 98 are operating systems designed to run on Intel processors using current technology. This file refers to Windows 95 and Windows 98 as Windows 95/98 in many instances throughout this document. LSI Logic uses the same filenames for their drivers for different Windows operating systems. The driver files are packaged either in separate subdirectories based on the Windows operating system or on different diskettes. To determine the driver file for Windows 95/98, note that the filename ends with '.MPD.' For example, SYMC8XX.MPD.

Windows 95/98 provide a graphical user interface environment incorporating many high-level features, which are described in Microsoft Windows 95 and Windows 98 documentation. An I/O manager handles I/O requests in Windows 95/98. To address a SCSI peripheral, the I/O manager goes through the appropriate drivers.

Windows 95/98 provide class drivers for hard disk, floptical, CD-ROM, printer, and scanner peripherals. Various peripheral manufacturers provide other class drivers, which you can add to support new devices.

Microsoft provides the port driver, and LSI Logic provides the miniport drivers, which are called SYMC8XX.MPD, SYM_HI.MPD and SYM_U3.MPD. These drivers complete the path to an LSI Logic controller or processor with an optional SDMS SCSI BIOS.

Note: Current Windows 95/98 drivers can be downloaded from the LSI Logic web site at http://www.lsilogic.com. After you are connected to this web site, place your cursor on the Get Drivers option in the menu bar. Click on the Drivers selection. Choose the Windows 95/98 operating system for SCSI and click on the Go button. Follow the instructions on subsequent screens to download the drivers.

The next sections describe the SDMS miniport drivers and their installation procedures.

The SDMS device drivers for Windows 95/98 support these features:

Ultra160 data transfers (for LSI53C1010)
Domain Validation (for SYM_U3.MPD driver only)
Parallel Protocol Request (for SYM_U3.MPD driver only)
Cyclic Redundancy Check (for SYM_U3.MPD driver only)
Synchronous negotiation (including Fast SCSI/Ultra SCSI/Ultra2 SCSI)
Wide negotiation
Auto request sense
Multiple host adapters
Multiple Logical Unit Numbers (LUNs)
Disconnect/Reselect
Scatter/Gather
Provides differential support
SCSI pass-through functionality
SCAM support (SCSI Configured AutoMatically)
Target-initiated negotiation support
NVRAM support (wide/sync parameters, SCSI Host ID, SCAM on/off)

Note: These SDMS miniport drivers also support Windows Me (Millennium Edition). The installation and upgrade procedures are similar to the Windows 98 instructions in this document.

All LSI Logic devices and host adapters have undergone a name change. They have transitioned from a SYM prefix to an LSI prefix. No name changes have occurred for the SDMS Windows 95/98 drivers.

The SYMC8XX.MPD driver supports the following devices and their associated LSI Logic host adapters:

LSI53C810, LSI53C810A, LSI53C810AE (LSI8100S, LSI8100ASP)

LSI53C815 (LSI815XS, LSI8150SP)

LSI53C825, LSI53C825A (LSI8250S, LSI8251S, LSI8251D, LSI8250ASP, LSI8251ASP, LSI8251AD)

LSI53C860, LSI53C860AE (LSI8600SP)

LSI53C875, LSI53C875E (LSI8750SP, LSI8751SP, LSI8751SPE, LSI8751D)

LSI53C876 (LSI22801, LSI22802)

LSI53C885

LSI53C895 (LSI8951U, LSI8952U)

The SYM_HI.MPD driver supports the following devices and their associated LSI Logic host adapters:

LSI53C896 (LSI22910, LSI21002, LSI22902)
LSI53C895A (LSI8953U)

The SYM_U3.MPD driver supports the following device and its associated LSI Logic host adapters: LSI53C1010 (LSI8955U, LSI22915, LSI21040, LSI22903).

The SYMC8XX.MPD, SYM_HI.MPD, and SYM_U3.MPD drivers meet the Microsoft specification for miniport drivers. These miniport drivers allow connection of SCSI devices including disk drives, CD-ROMs, and tape drives for PCI-based machines. To support a new SCSI device, the Windows 95/98 architectures require that a class driver for that type device is present (usually supplied by Microsoft, or possibly by the peripheral manufacturer). No changes to SYMC8XX.MPD, SYM_HI.MPD, or SYM_U3.MPD are required. Windows 95 and Windows 98 only support these SDMS miniport drivers.

A Windows application passes SCSI commands directly to the SCSI devices by using the SCSI pass-through facility (refer to Microsoft Windows 95 or Windows 98 documentation for details). This facility allows applications to directly control and access SCSI devices by filling in a data structure and calling into the port driver.

The SYMC8XX.MPDandSYM_HI.MPDdrivers support Ultra SCSI protocol, providing twice the raw data transfer rate of Fast SCSI for disk drives and LSI Logic host adapters that support Ultra SCSI. These drivers also support Ultra2 SCSI protocol, providing quadruple the raw data transfer rate of Fast SCSI. The SYM_U3.MPD driver supports Ultra160 SCSI protocol providing 80 Mbytes/s of data transfer and up to 160 Mbytes/s data transfer for double transition.

Caution: Ultra SCSI requires a more stringent SCSI bus cabling setup than Fast SCSI. Ultra2 SCSI and Ultra160 SCSI require Low Voltage Differential (LVD) termination.

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