Multitech ISI4608, Руководство пользователя

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Chapter 1 - Introduction and Description
Product Description
The ISI4608 is a multiport serial port expansion card which adds data
buffering on each port for enhanced serial port performance. The
ISI4608 features an on-board microprocessor to coordinate the
communications activity of your local and remote terminals. Using an
ISI4608 to provide additional serial connections enables your
system's processor to perform more efficiently. This is because the
ISI4608 handles all of the byte-by-byte interrupts generated by
asynchronous terminals and stores the data in buffers. The
processor works together with 256K bytes of RAM to allocate
resources dynamically to the most active port. The ISI then generates
one interrupt for an entire block of information and transfers the block
to the system's microprocessor.
The ISI4608 has one 78-pin (DB78S) connector which interfaces with
an eight-port fan-out, or “
octopus”, cable (supplied with the card),
providing eight additional serial ports. It is a "3/4 size" add-on card
which supports a high-speed interface up to 115.2K bps. The
ISI4608 features one bank of 8 DIP-Switches for I/O address
selection and one jumper block for IRQ selection.
How to Use This Manual
This manual presents installation procedures for the ISI4608 card
and for its software drivers. It contains information about technical
support and warranty coverage, as well as appendices for wiring and
regulatory matters. Hardware configuration and installation
procedures are described in Chapter 2. Installing the ISI460x-PCI
card also involves linking a driver to the operating system. This
information is presented in Chapter 3. An explanation of the
Multi_View utility, used in the UNIX environment is available in
Chapter 3 as well.
Most of the steps listed in the driver installation section instruct you to
"press Enter". This is a reference to the key commonly known as the
"Enter", "carriage-return", or simply "Return" key. Also, take the time
to notice the difference between the letter "O" and the number "0."
Both the letter and the number are used throughout this manual.