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Page 2 - DUAL PORT RS-232 SERIAL INTERFACE; FEDERAL COMMUNICATIONS COMMISSION; TRADEMARKS USED IN THIS MANUAL

DUAL PORT RS-232 SERIAL INTERFACE FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONSRADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy andif not installed and used properly, that is, in strict accordance with theman...

Page 3 - Contents; Chapter

DUAL PORT RS-232 SERIAL INTERFACE Contents Chapter Page 1. Specifications...................................................................................................12. Introduction ....................................................................................................2 2.1 Overv...

Page 4 - CHAPTER 1: Specifications; Asynchronous

1 CHAPTER 1: Specifications Protocol — Asynchronous Number of Ports — 2 Speed — IC110C: Up to 115.2 Kbps; IC174C: 460.8 kbps and higher Operation — RS-232 Connectors — (2) DB9M Maximum Distance — 50 ft. (15.2 m) @ 19.2 Kbps with 2500 pF max. cable capacitance (lower capacitance will allow greater di...

Page 5 - or

2 DUAL PORT RS-232 SERIAL INTERFACE 2.1 Overview The Dual Port RS-232 Serial Interface provides your PC system with two RS-232 asynchronous ports. Connect to any device that uses the RS-232 protocol,such as modems, data-entry terminals, and plotters. The Serial Interface also includes a serial utili...

Page 6 - CHAPTER 2: Introduction; • Each port is independently addressable.

3 CHAPTER 2: Introduction 2.3 Features Listed below are the special features your Serial Interface offers. • Each port is independently addressable. • Eight interrupt options, including AT interrupts, for simple integration into existing systems. • IRQs can be shared or individually set for each por...

Page 7 - Technical Description; asynchronous adapter. This chip features

4 DUAL PORT RS-232 SERIAL INTERFACE 2.4 Technical Description The Dual Port RS-232 Serial Interface provides the PC/XT™/AT/80X86computer with two additional serial ports for terminals, modems, printers,etc. The Dual Port RS-232 Serial Interface can be configured as COM1:through COM4:, or any other I...

Page 8 - Pin Number

5 CHAPTER 2: Introduction Pin Number Signal Name Mode 3 Transmit Data (TD) Output RS-232 7 Request To Send (RTS) Output RS-232 4 Data Term Ready (DTR) Output RS-232 5 Ground (GND) –––––––––––– 2 Receive Data (RD) Input RS-232 1 Data Carrier Detect (DCD) Input RS-232 6 Data Set Ready (DSR) Input RS-2...

Page 9 - NOTE; Address; Address Selection

6 DUAL PORT RS-232 SERIAL INTERFACE NOTE B e s u r e t o s e t t h e a d d r e s s s e l e c t i o n s a n d j u m p e r o p t i o n s b e f o r e installation. Each serial port on the Dual Port RS-232 Serial Interface occupies 8consecutive I/O locations. A DIP switch is used to set the base address...

Page 10 - ON; CHAPTER 3: Address Selection

7 you can determine the switch setting for a particular address by using thefollowing illustration. The illustration shows the correlation between the DIPswitch setting and the address bits used to determine the base address. In thefigure below, the address 300 hex through 307 hex is selected (300 H...

Page 11 - Setting the Interrupt Request

8 DUAL PORT RS-232 SERIAL INTERFACE NOTE B e s u r e t o s e t t h e a d d r e s s s e l e c t i o n s a n d j u m p e r o p t i o n s b e f o r e installation. The board contains several jumper straps for each port which must be set forproper operation. Port Enable/Disable Each port on the Dual Por...

Page 12 - MN; CHAPTER 4: Option Selection

9 Figure 4-1. Header E1 and E2 (IRQ 4 selected). Headers E3 and E4 select the (normal) single-interrupt-per-board mode orthe multi-interrupt mode, which allows you to share both interrupts on thiscard. The multi-interrupt mode also allows you to share the IRQ signal(s) withother cards that support m...

Page 13 - IMPORTANT; Installing the Adapter in Your Operating System; NT; Installing the Hardware

10 DUAL PORT RS-232 SERIAL INTERFACE IMPORTANT You MUST set up the operating system BEFORE you physically installthe Card. 5.1 Installing the Adapter in Your Operating System If you are installing an ISA adapter in DOS, OS/2 ® , or QNX, please refer to the appropriate directory on one of the Serial ...

Page 14 - CHAPTER 5: Installation; Installation is complete.

11 CHAPTER 5: Installation 4. Replace the screw. 5. Replace the cover. If you wish to change any resources assigned to the adapter, refer to the helpfile installed in the Black Box folder in the Start, Programs menu. Installation is complete.