1.1 Introduction
The introduction of high speed, data compression modems, such as Multi-Tech's MultiModemII TM Series, has shown that many PC serial ports are unable to keep up, essentially becoming a bottleneck for the entire system. The ISI551PC card provides processing power to reliably transmit data up to 115.2K bps. Using an ISI enables your system's processor to perform more efficiently. This is because the ISI handles all of the byte-by-byte interrupts generated by the asynchronous terminals and stores the data in buffers. The ISI then generates one interrupt for an entire block of information and transfers the block to the system's microprocessor.
This manual provides the hardware installation procedures for the ISI551PC card. The ISI551PC card is used with Multi-Tech's high speed modems; and is a high speed, buffered, single-port serial card, with its own on board processor. The operation of the card provides the basis for its name ISI (Intelligent Serial Interface), 551 indicating the processing power of a 16550A UART and one port support, and PC indicating that it is an ISA bus card (8 bit), which is able to operate in any 286, 386, 486 or Pentium ISA or EISA compatible bus personal computer. The ISI551PC card can be accessed by any software written to the 16550A specification.
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