AST CC-432 User manual

Data Communications Products
ASTCC-432
ASr
RESEAACH INC.
Communications Hard-
ware ProductProviding a
Synchronous Communica-
tions ChannelJ Normal
and NRZI Data Encoding
and Security for Custo;-
mizedSoftware

CC·432™
Advanced Communication Board
for the
IBM Personal Computer,
and IBM PC·XT
User's Manual
000140-001 D
October 1985
AST RESEARCH, INC.
Irvine, California
[phone]

Fourth Edition (October 1985)
IBM is a registered trademark of International Business Machines
Corporation.
MOSTEK is a registered trademark of Mostek Corporation.
Z-80 is a registered trademark of Zilog, Inc.
Compaq is a trademark of Compaq Computers, Inc.
AST Research periodically changes the information in this manual; changes
are incorporated into new editions. AST Research reserves the right to
modify this product's design.
A Product Comment Form is provided at the back of this publication. If this
form has been removed, please address your comments to:
AST Research,
Inc., Attn: Product Marketing, 2121 Alton Avenue, Irvine, CA 92714. AST
Research may use or distribute any of the information you supply in any way
it deems appropriate without incurring any obligations whatsoever.
Copyright © 1983 AST Research, Inc. All rights are reserved, including those
to reproduce this book or parts thereof in any form without permission in
writing from AST Research, Inc.
WARNING
This manual is protected by United States Copyright law
(Title 17 United States Code). Unauthorized reproduction
and/or sales may result in imprisonment of up to one
year and fines of up to $10,000 (17
USC 506).
Copyright infringers may be subject to civil liability.

TABLE OF CONTENTS
SECTION 1 INTRODUCTION........................ 1-1
1.1 PC Compatibility .............................. 1-1
1.2 Modem Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3 Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . 1-2
SECTION 2 CONFIGURATION ....... ............... 2-1
2.1 Factory Default Configuration ................... 2-2
2.2 Cable Information
............................. 2-2
2.3 Changing the Factory Default Configuration
....... 2-4
2.4 I/O Address and Function Selection
.............. 2-4
2.5 Port Configuration
............................ 2-7
2.6 Interrupt Line Selection
........................ 2-9
2.7 Baud Rate Selection
......................... 2-10
2.8 CC-432 Shorting Plug Summary ................ 2-10
2.9 Additional Control Signals
..................... 2-12
2.10 NRZI Encode/Decode ........................ 2-13
SECTION 3 INSTALLATION . ....................... 3-1
SECTION 4 PROBLEM DETERMINATION
PROCEDURES
.. ....................... 4-1
4.1 Finding the Problem .......................... 4-1
4.1.1 Modems ............................... 4-1
4.1.2 Software Parameters ..................... 4-2
4.1.3 Phone Lines
............................ 4-2
4.1.4
PC System Hardware .................... 4-2
4.2 Repair Procedure
............................. 4-3
SECTION 5 THE C432TEST DIAGNOSTIC ............ 5-1
5.1 Hardware Requirements ....................... 5-1
5.2 Software Requirements ........................ 5-2
5.3 Setup ...................................... 5-2
5.3.1 CC-432 Board Setup
..................... 5-2
5.3.2 Loopback Plug Configuration
.............. 5-4
5.3.3 Install the Modem or Loopback Plug
........ 5-4
5.4 Diagnostic Operation
.......................... 5-4
iii

TABLE OF CONTENTS
(Continued)
5.5 Test Descriptions ............................. 5-6
5.5.1 SIO Register Write/Read Test
.............. 5-6
5.5.2 SIO Interrupt Test
....................... 5-7
5.5.3 SDLC Loopback Test.
.................... 5-7
5.6 Error Messages
.............................. 5-7
APPENDICES
APPENDIX A 110 ADDRESS MAP .................... A-1
APPENDIX B HARDWARE INTERRUPT LINES ......... B-1
FIGURES
Figure 2-1. CC-432 Board Layout .................... 2-6
Figure 3-1. Turn
PC Power OFF (rear view) ............ 3-2
Figure 3-2. Remove
PC Cover ....................... 3-3
Figure 3-3. IBM Expansion Slots
..................... 3-4
Figure 3-4. Install Your CC-432 Board
................. 3-5
Figure 3-5. Install Cables
........................... 3-6
TABLES
Table 2-1. CC-432 (DTE mode) and
Modem Configuration
..................... 2-3
Table 2-2. CC-432 110 Address Select ................. 2-5
Table 2-3. CC-432
AO-A3 Function Select .............. 2-7
Table 2-4. DTE and DCE Configurations
............... 2-8
Table 2-5. SIO Data and Modem Control Signals
........ 2-8
Table 2-6. Interrupt Line Selection
.................... 2-9
Table 2-7. CC-432 Shorting Plug
(Positions 1-9) Summary .................. 2-10
iv

SECTION 1
INTRODUCTION
This manual tells you how to configure, install, and run the
diagnostic for the AST Research, Inc., CC-432 Advanced
Communication board. The CC-432 board allows you to
configure its single-channel communications port
as DTE
(Data Terminal Equipment, the equipment associated with a
user) or DCE (Data Communications Equipment, the
equipment associated with the transmission facilities). The
CC-432 board performs all serial-to-parallel and parallel-to-
serial conversions
in synchronous mode, and offers a choice
of normal or Non Return to Zero Inverting (NRZI) data
encoding.
The combination of the CC-432 board and AST Research
communications packages provides convenience and cost
saving by allowing you to support a variety of terminal
emulation and communications protocols. To use a different
type of emulation or communication capability, simply change
diskettes and boot another AST Research communications
program.
The communication element
on the AST Research CC-432
board is its dual port Serial Input/Output (SIO) chip. The
functions available on the SIO include modem control signals
and CRC (Cyclic Redundancy Check) error checking.
1.1 PC Compatibility
The AST Research CC-432 Advanced Communication board
is completely compatible with the IBM
PC and PC-XT.
1-1

1.2 Modem Compatibility
The CC-432 board and its various associated AST Research
software packages are designed for use with Bell-compatible
synchronous modems. A Bell-compatible modem usually has
a model number that corresponds to the Bell standard it
complies with, and different model numbers operate at
different baud rates (for example, 212 = 1200 baud,
201 = 2400 baud, and 208 = 4800 baud).
You can use other modems as long as the modems at both
ends of the phone line are compatible with each other. The
modem that you use must also
be compatible with the
modem at the host (the host is the machine that you are
communicating to). For example, if you use
an IBM modem at
a host computer, you must use
an IBM modem at an IBM PC
at the other end of the phone line. An IBM modem will not
communicate with a Bell-compatible modem.
All AST Research emulation package line protocols require
synchronous modems. Asynchronous modems (such
as the
Hayes and Novation modems) will not work with AST
Research emulation packages.
1.3 Related Documentation
This manual assumes some familiarity with the PC-DOS
operating system and the PC hardware. This information can
be found in the following manuals:
IBM Personal Computer Guide to Operations manual
IBM Personal Computer Technical Reference manual
IBM Personal Computer Disk Operating System manual
1-2

The communication element of the AST Research CC-432
Advanced Communication board is the 510 (such as the Zilog
Z-80 510-0 or the MOSTEK MK3884). Programming and
vector interpretation of the 510 are detailed in
an 510
reference manual such as:
Zilog Z-80 SID Technical Manual
or
MOSTEK MK38841517 Serial 110 Controller Technical Manual
1-3

1-4

SECTION 2
CONFIGURATION
If your CC-432 board is part of a complete AST Research
hardware/software package,and you intend to communicate
with a host computer via a modem/phone line link, it
-is
probably ready to use in its factory default configuration.
NOTE
If you are using the AST-3780 package, the
CC-432 board is ready to use as is (verify
the factory configuration below). If you are
using the AST-5251, AST-SNA, or AST-BSC
communications packages, the only change
you have to make to the factory
configuration is to remove the shorting plug
from pOSition 8.
Otherwise, you must configure the AST Research CC-432
Advanced Communication board to select its IBM PC I/O
addresses, interrupt line, baud rate, and to configure its
communications port as DCE or DTE (default is DTE). You
can also configure your CC-432 to take advantage of
additional control signals, and to support the Non Return to
Zero Inverting (NRZI) data encoding that is commonly used
with some synchronous protocols (default is non-NRZI).
This section describes how to set the DIP switch, shunts, and
shorting plugs for your application, and is intended primarily
for those users who want to create their own custom software
for the CC-432. If you are using the CC-432
as part of a
complete AST Research communications package, this
information is useful
as a reference. Your AST Research
communications package user's manual tells you how to
configure your CC-432 board for your application.
2-1

NOTE
When you install your AST Research
communications package
and CC-432 card
in your PC, be sure that you know which
IRQ lines and I/O addresses are used by
each of the devices
in your system (you
can obtain this information from the device
suppliers, user's manuals, and your dealer).
Resolving device conflicts before installation
will save time and frustration later
on.
Refer to the CC-432 board layout (Figure 2-1) throughout this
section.
2.1 Factory Default Configuration
If your CC-432 board is part of a complete AST Research
hardware/software package (such
as AST-SNA, AST-BSC,
AST-3780, or AST-5251), it is probably ready to use in its
factory configuration, and you won't need to make any
changes.
To verify proper factory default configuration, check your
CC-432 board settings:
1. DIP switch SW1 set as follows:
12345678
ON ON OFF OFF OFF OFF OFF ON
2. DIP shunts installed in positions U25 and U27 (DTE).
3. Shorting plugs installed in positions 1, 3, and 8.
2.2 Cable Information
This Subsection gives cable configuration information that is
important for standard use.
2-2

When you use the CC-432 in DTE mode, the cable should
only
be as long as necessary to reach a modem positioned
next to your
PC. When you use the CC-432 in DCE mode,
limit the cable length to a maximum of 50 feet. Some
installations require a shielded cable for reliable operation.
AST Research recommends that you use a shielded 25-pin
cable for reliable operation. However, the 11-pin cable shown
in Table
2-1 can be used for some installations; this typical
configuration includes the CC-432 board (DTE mode) and a
synchronous modem for use with an AST Research
communications package (asynchronous modems will not work).
Table 2-1. CC-432 (DTE mode) and Modem Configuration
CC-432
J1 Pin
2
3
""'
4
5
6
7
8
15
17
20
Signal Modem
Direction Pin Signal Name
1 Chassis Ground
2 Transmit Data (TxD)
3 Receive Data (RxD)
4 Request To Send (RTS)
5 Clear To Send (CTS)
6 Data Set Ready (DSR)
7 Signal Ground
8 Data Carrier Detect (DCD)
15 Transmit Clock (TxDCE)
17 Receive Clock (RxDCE)
20 Data Terminal Ready (DTR)
NOTE
For DCE operation, the cable configuration
is the same, but the signal directions are
reversed.
2-3

2.3 Changing the Factory Default Configuration
In its factory default configuration the CC-432 board is set up
as follows:
1. Occupies PC 1/0 hexadecimal addresses 300-30F
2. DTE operation (external synchronous modem
required)
3. Interrupts generated on IRQ2.
Your AST Research communications package user's manual
tells
you how to configure your CC-432 board for your
application. This information is useful for technical personnel
in the event that there is a hardware or software conflict
between the CC-432 and another device installed in your PC:
To reconfigure the CC-432 for a different set of 1/0
addresses, refer to Subsection 2.4.
To reconfigure the CC-432 for DCE mode, refer to
Subsection 2.5.
To reconfigure the CC-432 to use an interrupt other than
IRQ2, refer to Subsection 2.6.
This section also includes information
on the cable
configuration, baud rate, shorting plug functions,
additional modem control signals, and NRZI data
encoding (see Subsections 2.7 through 2.10).
2.4 I/O Address and Function Selection
The CC-432 occupies 16 consecutive locations of the IBM PC
1/0 address space. To avoid conflict with existing IBM PC
peripheral boards, use an address range that is not used by
any of the peripherals
in your PC (Appendix A gives the
standard 1/0 address map for the
IBM PC). Positions 1 and 2
on DIP switch S1 select the 1/0 address range for the CC-432
(Table
2-2).
2-4

Table 2-2. CC-432 1/0 Address Select
S1 Position
1 2
ON
OFF
ON
OFF
ON
ON
OFF
OFF
NOTE
Hexadecimal
1/0 Addresses
300-30F*
320-32F
340-34F
360-36F
*The factory default setting for the CC-432
board is for
1/0 addresses 300-30F.
AST Research communications packages
normally use 1/0 addresses 300-30F (S1
positions 1 and 2 ON). Consult your user's
manual for information on other available
address settings where applicable.
2-5

N
•
en
"'T1
cO'
s:::::
;
N
•
.....
o
o
.
.1:>0
Co)
N
OJ
o
ell
a.
r-
ell
'<
o
s:::::
-
U28
11
Factory Configuration:
Shorting Plugs at
1,3, and 8
Shunt positions for oTE
(Factory configuration:
shunts Installed at
U25
and U27)
C)
c-J- ••
= R6
U",
'-----~-r----_t_-+-oCE Shunt
Positions
CC'432
j~, U2'
.g '------------' , ~! ----~
U3 I I i SPI
I~--~( c==:su.
~ ct=:-=1~O'i=-~=_~2~~::=:3!~
Edge Connector
Factory Configuration: 1, 2, 8 ON (300-30F)
t
Card
Bracket

Once the CC-432 board has been software-selected, address
lines AO through A3 select the functions summarized in
Table 2-3.
Table 2-3. CC-432 AO-A3 Function Select
Address Lines
A3 A2 A1
AO
Selected Function
0 0 0 0 Data port 510 channel A
0 0 0 1 Data port 510 channel B
0 0 0 Control port 510 channel A
0 0 1 1 Control port 510 channel B
0 1 X X Reserved
1 0 X X Reserved
1 1 X X Read interrupt vector
X = Don't Care
If the selected I/O address range is 300 through 30F, then
3nO is 300, 3n1 is 301, and so on. Hexadecimal I/O
addresses 3nO through 3n3 select one of the 510 registers
and perform a read or write (depending
on the I/O
instruction). The 510 contains eight registers (WRO through
WR7) that are programmed by the system program and
determine the functional personality of the 510 channels (the
510 reference manual provides detailed programming
information).
2.5 Port Configuration
The communications port on the AST Research CC-432 board
can be configured as DTE or DCE. In DTE mode: the CC-432
expects to be connected to a synchronous modem that
provides clocking signals as well as data. In
DeE mode: the
on-board modem eliminator is enabled. For some applications
where the
PC is in the same room as the host computer, the
on-board CC-432 modem eliminator can replace a separate
modem eliminator. The CC-432 modem eliminator does not
replace the RS-232 interface that is required for
communicating with the PC.
2-7

The eight-position shunts that configure the port. also carry
signals that can be used for modem controls. Install the
shunts in the positions (shown in Figure 2-1) summarized in
Table 2-4 for the desired configuration.
Table 2-4. DTE and DCE Configurations
Configuration
DCE
DTE*
Shunt Positions
U26, U28
U25, U27
*The factory default configuration is for DTE operation.
Table 2-5 summarizes how the SIO data and modem control
signals appear at the DB-25 connector in the DTE and DCE
configurations.
Table 2-5. SIO Data and Modem Control Signals
DTE Mode DCE Mode
SIO Signal J1 Signal J1 Pin J1 Signal J1 Pin
TxDA Output TxD 2 RxD
3
RxDA Input RxD 3 TxD 2
RTSA Output RTS 4 DCD
8
CTSA Input CTS 5 *
DCDA Input DCD 8 RTS/CTS
4/5**
CTSB Input DSR 6 DTR 20
DTRA Output DTR 20 DSR
6
TxCA Input TxC
15
TxC 15***
RxCA Input RxC
17 RxC
17***
Chassis Ground 1 1
Signal Ground 7 7
* In DCE mode, the SIO RTSA output is routed to SIO
CTSA input.
**In DCE mode, J1 pin 4 RTS input is routed to J1 pin 5
CTS output and to SIO DCDA input.
***In DCE mode, the J1 pins 15 and 17 clock outputs and
SIO clock inputs are determined by the strapping of the
baud rate jumpers as long as shorting plugs are
installed in positions 2 and 4.
2-8

2.6 Interrupt Line Selection
Positions 3 through 8 on DIP switch S1 select an Interrupt
Request (IRQ) line for the CC-432. Table 2-6 lists the IRQ line
selected by each of these five positions.
An ON condition
selects the interrupt line, and only one IRQ position can be
ON at any time.
Table 2-6. Interrupt Line Selection
S1 Position
8
7
6
5
4
3
NOTE
Interrupt Line
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
AST Research communications packages
normally use IRQ2. Consult your user's
manual for information on other available
interrupt options where applicable.
For all applications, make sure that the
selected IRQ line is not used by another
system device. Only one IRQ position
on
the CC-432 can be ON at any time.
Appendix B lists standard
IBM assigned
IRQ applications.
When you operate the CC-432 board with the SIO in the
vectored interrupt mode and there
is an interrupt from the
SIO, you must read I/O address 3nF during the interrupt
routine. The contents of that address tell you what condition
caused the interrupt (that
is, which of the eight interrupt
service routines
is pOinted to). This vector must be read in the
interrupt service routine regardless of whether the vector
information
is used. Failure to read this value can cause
improper SIO interrupt operation. The SIO reference manual
details programming
and vector interpretation.
2-9

2.7 Baud Rate Selection (DCE mode only)
NOTE
If your CC-432 board is configured for DTE
operation, the position of the baud rate
shorting plug
has no effect because the
baud rate
is determined by the modem.
If your CC-432 board is configured for DCE operation, the
baud rate jumper block (shown
in Figure 2-1) selects the baud
rate for the CC-432 clock
(as long as shorting plugs are
installed in positions 2 and 4). To select the baud rate, install
a shorting plug in the position that corresponds to the desired
baud rate. For example, if you want to select a baud rate of
9600, install a shorting plug in the shorting block position
labeled 9600.
2.8 CC-432 Shorting Plug Summary
Table 2-7 summarizes the functions that correspond to the
shorting plugs installed
in positions 1 through 9 (illustrated in
Figure 2-1) on the AST Research CC-432 board. The default
configuration is for shorting plugs installed in positions 1, 3,
and 8.
Table 2-7. CC-432 Shorting Plug (Positions 1-9) Summary
Shorting Plug
Position
2-10
Function
DTE Mode: Routes J1 pin 17 Receive Clock
input to the SIO RxCA Receive
Clock input.
DCE Mode: No function.

Table 2-7. CC-432 Shorting Plug (Positions 1-9) Summary
(Continued)
Shorting Plug
Position Function
2 DTE Mode: Routes the internal baud rate
generator clock to the 510
RxCA Receive Clock input.
DCE Mode: Same as DTE. Also routes
same clock to
J1 pin 15
Transmit Clock output.
3 DTE Mode: Routes J1 pin 15 Transmit
Clock input to the 510 TxCA
Transmit Clock input.
DCE Mode: No function.
4 DTE Mode: Routes the internal baud rate
generator clock to the 510
TxCA Transmit Clock output,
and to the
J1 pin 24 Transmit
Clock input.
DCE Mode: Routes the internal baud rate
generator clock to the 510
TxCA Transmit Clock input and
to the
J1 pin 17 Receive Clock
output.
5 DTE Mode: No function.
DCE Mode: Routes. the J1 pin 24 Transmit
Clock input to the 510 RxCA
Receive Clock input.
6 DTE Mode: Routes
J1 pin 22 Ring Indicator
input to the 510 DCDB input.
DCE Mode: Forces J1 pin 22 Ring Indicator
into a false state.
2-11