Quatech ES-100M Owner's Manual

ES-100M / QS-100M

Multi-port Asynchronous

Communications Adapter

User's Manual

QUATECH, INC. TEL: [phone]
662 Wolf Ledges Parkway FAX: [phone]
Akron, Ohio 44311 BBS: [phone]

ES-100
User's Manual
Version 2.00
October 1994
P/N. 940-0019-200

WARRANTY INFORMATION

Quatech Inc. warrants the ES-100M / QS-100M to be free of

defects for one (1) year
repair or replace any adapter that fails to perform under normal operating
conditions and in accordance with the procedures outlined in this
document during the warranty period. Any damage that results from
improper installation, operation, or general misuse voids all warranty
rights.

The authors have taken due care in the preparation of this
document and any associated software program(s). In no event will
Quatech Inc. be liable for damages of any kind, incidental or
consequential, in regard to or arising out of the performance or form of
the materials presented herein and in the program(s) accompanying this
document. No representation is made regarding the suitability of this
product for any particular purpose.

Quatech Inc. reserves the right to edit or append to this document
or the product(s) to which it refers at any time and without notice.

from the date of purchase. Quatech Inc. will

Please complete the following information and retain for your
records. Have this information available when requesting warranty
service.

Date of purchase:

Model Number: ES-100 / QS-100M

Product Description: Multi-port Asynchronous Communications

Adapter

Serial Number:

TABLE OF CONTENTS

List of Figures iii

I. General Information 1

II. Installation 2
III. Addressing Ports 5
IV. Interrupt Level (IRQ) 8

Interrupt Sharing 8
Interrupt Status Register 8

V. External Connections 10

Channel Output Configuration 11

VI. Serial Port Functional Description 14

Accessing the Serial Port Registers 15
Interrupt Enable Register 16
Interrupt Identification Register 16
FIFO Control Register 18
Line Control Register 19
Modem Control Register 20
Line Status Register 21
Modem Status Register 22
Scratchpad Register 22
FIFO Interrupt Mode Operation 23
FIFO Polled Mode Operation 24
Baud Rate Selection 25

VII. Serial Port Functional Description 27

VIII. Troubleshooting 28

LIST OF FIGURES

Figure 1. Default address and IRQ settings 2
Figure 2. Diagram of QS-100M / ES-100M 3
Figure 3. Port address map 5
Figure 4. Examination of a serial port base address 6
Figure 5. Serial port base I/O address selection switches 7
Figure 6. Interrupt level (IRQ) selection 8
Figure 7. Enabling the Interrupt Status Register 9
Figure 8. Interrupt Status Register contents 9
Figure 9. Use of DTEs and DCEs in a communications link 10
Figure 10. Cabling requirements for RS-232-C devices 10
Figure 11. QS-100M / ES-100M connector definitions 11
Figure 12. QS-100M / ES-100M output connectors 11
Figure 13. Auxiliary signal configuration jumpers 12
Figure 14. Output connector configuration 13
Figure 15. Serial port register address map for 16450/16550 15
Figure 16. Interrupt Enable Register bit definitions 16
Figure 17. Interrupt Identification Register bit definitions 17
Figure 18. Interrupt Identification Register bit decoding 17
Figure 19. 16550 FIFO Control Register bit definitions 18
Figure 20. Line Control Register bit definitions 19
Figure 21. Modem Control Register bit definitions 20
Figure 22. Line Status Register bit definitions 21
Figure 23. Modem Status Register bit definitions 22
Figure 24. Input clock frequency options 25
Figure 25. Divisor latch settings for common baud rates 26

I. GENERAL INFORMATION

The Quatech, Inc. ES-100M provides eight RS-232 asynchronous
serial communication interfaces for IBM-compatible personal computer
systems using the 16-bit ISA (Industry Standard Architecture) expansion
bus. The QS-100M is a four-port version of the same product (with
several blank areas on the circuit card). External connections are made
using RJ-11 "phone jack" connectors. This document uses "QS/ES-100M"
when information applies to either product.

The QS/ES-100M's serial ports are implemented using 16450
Universal Asynchronous Receiver/Transmitters (UARTs). For higher
performance, 16550 UARTs can be installed in place of the 16450 UARTs.
The 16550 contains a hardware buffer that reduces processing overhead.
Software must be aware of the 16550 UART for the device's extra
capabilities to be used, otherwise it will act as a 16450 UART. The 16550 is
suggested for multitasking environments and for applications involving
high data rates.

The QS/ES-100M is highly flexible with respect to addressing and
interrupt level use. The serial ports are addressed in a contiguous block
that can be placed anywhere within the range of 0000 hex to FFFF hex,
and available interrupt levels include IRQ2 to IRQ7, IRQ10 to IRQ12,
IRQ14, or IRQ15. (Early versions of the QS/ES-100M are limited to
IRQ2-7.)

All ports on the QS/ES-100M share one interrupt level. A special
interrupt status register is provided to allow controlling software to
manage the shared interrupt level. The shared interrupt feature
minimizes the system resources consumed by the adapter.

In order to support the use of the shared interrupt feature of the
QS/ES-100M, Quatech has developed device drivers for several popular
operating systems and environments. The sales department can be
contacted for details on current offerings.

Quatech QS-100M/ES-100M User's Manual 1

II. INSTALLATION

If the default address and interrupt settings are sufficient, the
QS/ES-100M can be quickly installed and put to use. The factory defaults
are listed in Figure 1.

PORT ADDRESS IRQ
Serial 1 300 hex 3
Serial 2 308 hex 3
Serial 3 310 hex 3
Serial 4 318 hex 3
Serial 5 (ES only) 320 hex 3
Serial 6 (ES only) 328 hex 3
Serial 7 (ES only) 330 hex 3
Serial 8 (ES only) 338 hex 3

Figure 1 --- Default address and IRQ settings for QS/ES-100M

The outputs of the QS/ES-100M are provided with RJ-11

connectors. See section V of this manual for connector details.

1. If the default settings are correct, skip to step 2, otherwise refer to
sections III and IV of this document for detailed information on
how to set the address and IRQ level.

2. Turn off the power of the computer system in which the
QS/ES-100M is to be installed.

3. Remove the system cover according to the instructions provided by
the computer manufacturer.

4. Install the QS/ES-100M in any vacant expansion slot. The board
should be secured by installing the Option Retaining Bracket (ORB)
screw.

5. Replace the system cover according to the instructions provided by
the computer manufacturer.

6. Attach and secure the cable connectors to the desired equipment.

2

Quatech QS-100M/ES-100M User's Manual

CN1

Shaded parts are not present on the QS-100M.

(Diagram not to scale)

J12

J14

J11

J13

16450/16550

J16

J15

16450/16550

16450/16550

J18
J17

16450/16550

J10

IRQ 15
IRQ 14
IRQ 12
IRQ 11
IRQ 10
IRQ 7
IRQ 6
IRQ 5
IRQ 4
IRQ 3
IRQ 2

J2

J3J4J5

16450/16550

J1

J6

J7

16450/16550

16450/16550

J8

J9

QUATECH INC.

16450/16550

SW2

SW1

(SW1, SW2)

Set addresses here

(J10)

Set IRQ level here

ES-100 / QS-100M

Figure 2 --- Diagram of QS/ES-100M

Quatech QS-100M/ES-100M User's Manual 3

(This page left blank intentionally.)

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Quatech QS-100M/ES-100M User's Manual

III. ADDRESSING PORTS

Setting The Address

The base address of the QS/ES-100M is set using the two DIP
switch packs. When setting the address selection switches, a switch in the
"ON" position specifies that the corresponding address line must be a
logic 0 for the port to be selected. Similarly, a switch in the "OFF" position
forces the corresponding address line to be a logic 1 for the port to be
selected.

A full sixteen bit address decode is implemented to reduce the
chance of address conflicts with other adapters in the system. The base
address of the QS/ES-100M can be set anywhere in the range of 0000 hex
to FFFF hex. Each serial port on the QS/ES-100M uses 8 consecutive I/O
locations. The ports reside in a contiguous block of I/O space in eight
byte increments, for a total of 32 contiguous bytes in the case of the
QS-100M, or 64 contiguous bytes in the case of the ES-100M. This is
shown in Figure 3.

PORT ADDRESS RANGE
Serial 1 Base Address + 0 to Base Address + 7
Serial 2 Base Address + 8 to Base Address + 15
Serial 3 Base Address + 16 to Base Address + 23
Serial 4 Base Address + 24 to Base Address + 31
Serial 5 (ES only) Base Address + 32 to Base Address + 39
Serial 6 (ES only) Base Address + 40 to Base Address + 47
Serial 7 (ES only) Base Address + 48 to Base Address + 55
Serial 8 (ES only) Base Address + 56 to Base Address + 63

Figure 3 --- Port address map

Quatech QS-100M/ES-100M User's Manual 5