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1 Getting Started This guide explains how to install the APA-358A MiniSCSI™-2 host adapter. The MiniSCSI-2 lets you operate your SCSI devices through your computer’s parallel port, while still using the port for your printer. You can use the MiniSCSI-2 with an enhanced parallel port (EPP), an extended capabilities port that is EPP compliant (ECP/EPP), or a conventional parallel port.
2 Understanding the MiniSCSI-2 Before you install the MiniSCSI-2, read this section to learn about MiniSCSI-2 features, components, and SCSI settings. You will need this information when you install the MiniSCSI-2. General Features The MiniSCSI-2 lets you connect up to seven external SCSI devices to your computer’s parallel port. You can connect almost any type of SCSI device, including hard disk drives, CD-ROM drives, removable-media drives, and scanners.
■ An LED light, which indicates whether a SCSI device is supplying termination power (see Termination Power on page 4). SCSI Connector LED Printer Passthrough Connector Jack for AC Adapter Parallel Port Connector Settings The MiniSCSI-2 has the following factory-set SCSI ID and SCSI termination: ■ SCSI ID: 7 ■ SCSI termination: Always enabled SCSI ID SCSI devices connect to each other in one continuous line called the SCSI bus.
The device at the other end of the SCSI bus will be an external SCSI device, such as an external hard disk drive. External SCSI devices are normally terminated by installing a terminator in the unused SCSI connector on the SCSI device (see the figure on page 5 for an example) or by setting jumpers or switches. See your device documentation for details. Termination Power The SCSI bus must have termination power, a specific voltage (5 volts) required by the terminators.
MiniSCSI-2 driver automatically detects which port is used. Note: If you use a copy-protection device (commonly known as a dongle) on the parallel port, connect it to the printer passthrough connector on the MiniSCSI-2. If this arrangement causes problems, relocate either the dongle or the MiniSCSI-2 to a different parallel port. 2 Plug the MiniSCSI-2 parallel port connector into the parallel port. 3 Plug the SCSI connector on the MiniSCSI-2 into the first SCSI device.
6 Terminate the last SCSI device attached to the MiniSCSI-2, referring to the device documentation for instructions. 7 Disable termination on all other SCSI devices attached to the MiniSCSI-2, referring to the device documentation for instructions. 8 To use a parallel printer with the MiniSCSI-2, connect a standard parallel printer cable to the MiniSCSI-2 printer passthrough connector (see the following figure). No special configuration or switching is needed.
4 Installing Adaptec EZ-SCSI To complete installation, install the Adaptec EZ-SCSI software that accompanied the MiniSCSI-2. To do so, follow the instructions in Adaptec EZ-SCSI User’s Guide. The Adaptec EZ-SCSI Software Adaptec EZ-SCSI provides the ASPI manager and the device drivers the MiniSCSI-2 needs to operate under DOS and Windows. The following table lists the main Adaptec EZ-SCSI software used with the MiniSCSI-2. For details, see Adaptec EZ-SCSI User’s Guide. Software ma358.sys aspidisk.
/Mnm Determines the mode configuration and the amount of time that the MiniSCSI-2 read and write cycles are delayed (parallel ports on some computers require delays). You must specify values for both n and m. The n specifies the amount of delay. Allowable values for n are 0 through 7, with each number representing a 125-nanosecond (ns) increment. A value of 7, for example, adds an 875 ns (7 x 125) delay to the cycles. The default of 0 specifies no delays. The m parameter determines the mode.
termination power and may need to obtain an AC adapter (see Termination Power on page 4). ■ Make sure the SCSI bus is properly terminated. ■ Make sure all SCSI devices have unique SCSI IDs. ■ Make sure you are not trying to boot from a device on the MiniSCSI-2. (A computer cannot boot from a device connected to the parallel port.) ■ Make sure the parallel port address is 278h or 378h. If it is 3BCh, the parallel port cannot be used in EPP mode.
■ If m is 8 (which tells ma358.sys to assume EPP mode), the parallel port may not be EPP compliant. Check your computer documentation or contact your vendor to determine if the port is EPP compliant. If it is not EPP compliant, change m to 0, 2, or 4 (see ma358.sys Options on page 7). If the port is EPP compliant, you probably need to configure it as an EPP port in the CMOS setup program or else load a driver supplied by the manufacturer (see the manufacturer ’s instructions for the proper procedure).
After setting the option, perform the tests below to ensure the adapter is functioning properly: a Perform a dir command on a hard disk drive and/or a CD-ROM drive. Check for problems, such as absurdly wrong numbers or corrupted file names being reported. b Try copying a large file (greater than 100 KBytes, if possible) from the SCSI device to a non-SCSI hard disk or floppy drive. Then use the DOS comp command to compare the new copy to the original file.
6 Adaptec Customer Support Services If you have questions about installing or using the host adapter, check this install guide first—you will find answers to most of your questions here. If you need further assistance, please contact us.
FCC Compliance Statement NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
