Impulse 3612 - Manual (Page 3)

Introduction
Sealevel Systems PC-ACB.MP Page 1
Introduction
Overview
In the last few years, the portable and notebook market has grown by leaps and bounds. Most early laptops and
notebooks handled I/O expansion through proprietary expansion slots. These slots provided limited expansion for
specific peripherals such as modems and FAX peripherals. Mass storage peripherals were factory installed and
could not be easily changed. Interconnectivity through local area networks offered limited performance through
slow parallel port network interfaces.
During this time period two standards organizations, JEIDA and PCMCIA, were working on the standardization of
memory IC cards. These cards were designed as strictly non-volatile silicon storage. JEIDA was the first to propose
the 68-pin connector standard for memory cards. In 1989, PCMCIA adopted the JEIDA 68 pin standard and worked
with JEIDA on further developments.
As the notebook market grew, the need for a standard I/O bus was seen. The PCMCIA groups saw an opportunity to
meet this need with an expanded version of the 68-pin interface. Further development occurred and within one year,
release 2.0 of the standard was completed. Release 2.0 was a major update to Release 1.0 and included full
hardware support for I/O devices. Release 2.0 coincided with JEIDA’s 4.1 release and is identical.
The PC-ACB.MP adapter provides your portable PC with a single channel multi-protocol serial interface utilizing
the Zilog Z85233 (ESCC™), which is suitable for the most popular communication protocols including
HDLC/SDLC, X.25, Bi-Sync, Mono-Sync, and asynchronous.
The PC-ACB.MP utilizes the Sipex-505 multi-protocol electrical interface chip that allows the PC-ACB.MP to be
compliant with EIA/TIA-530/530A, EIA/TIA-232E, EIA/TIA-485, and ITU V.35.
What’s Included
The PC-ACB.MP is shipped with the following items. If any of these items are missing or damaged, contact the
supplier.
• PC-ACB.MP PCMCIA Serial Interface Adapter
• DB-25 cable assembly
• Loopback Plug
• Impact Resistant Carrying Case (Jewel Case)
• Sealevel Software