SeaLevel ACB-V User manual

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© Sealevel Systems, Inc. 4012 Manual | SL9153 12/2022
ACB-V
User Manual | 4012

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© Sealevel Systems, Inc. 4012 Manual | SL9153 12/2022
Contents
CONTENTS...........................................................................................................................................................2
BEFORE YOU GET STARTED ...............................................................................................................................3
INSTALLATION .................................................................................................................................................... 4
CARD SETUP ........................................................................................................................................................5
TECHNICAL DESCRIPTION ................................................................................................................................. 9
PROGRAMMING THE ACB-V CONTROL/STATUS PORT.................................................................................10
INSTALLATION ..................................................................................................................................................13
ENVIRONMENTAL SPECIFICATIONS ...............................................................................................................14
APPENDIX A – TROUBLESHOOTING................................................................................................................15
APPENDIX B – SAFETY INSTRUCTIONS..........................................................................................................16
APPENDIX G – COMPLIANCE NOTICES ..........................................................................................................17
WARRANTY ........................................................................................................................................................18
................................................................................................................................................................................

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Before You Get Started
What’s Included
The ACB-V is shipped with the following items. If any of these items are missing or damaged, please contact
Sealevel for replacement.
•ACB-V (P/N: 4012)
Advisory Conventions
Warning
The highest level of importance used to stress a condition where damage could result to the
product, or the user could suffer serious injury.
Important
The middle level of importance used to highlight information that might not seem obvious or a
situation that could cause the product to fail.
Note
The lowest level of importance used to provide background information, additional tips, or other
non-critical facts that will not affect the use of the product.

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Installation
The ACB-V can be installed in any of the PC expansion slots. Remove the PC case, remove the blank metal
slot cover, and insert the board. Replace the screw, replace the cover, and the installation is complete.
Be sure to set the address and jumper options before installation.

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Card Setup
Address Selection
The ACB-V occupies 8 consecutive I/O locations. A dip-switch (SW1) is used to set the base address for
these locations. Be careful when selecting the base address as some selections conflict with existing PC
ports. The following table shows several examples that usually do not cause a conflict.
Address
Binary
Switch Settings
A9-----------A0
1
2
3
4
5
6
7
238-23F
1000111XXX
Off
On
On
On
Off
Off
Off
280-287
1010000XXX
Off
On
Off
On
On
On
On
2A0-2A7
1010100XXX
Off
On
Off
On
Off
On
On
2E8-2EF
1011101XXX
Off
On
Off
Off
Off
On
Off
300-307
1100000XXX
Off
Off
On
On
On
On
On
328-32F
1100101XXX
Off
Off
On
On
Off
On
Off
3E8-3EF
1111101XXX
Off
Off
Off
Off
Off
On
Off
Typically COM1:=3F8H; COM2:=2F8H; COM3:=3E8H; COM4:=2E8H.
Figure 1
The following illustration shows the correlation between the dip-switch setting and the address bits used
to determine the base address. In the example below, the address 300 Hex through 307 Hex is selected.
300 Hex =11 0000 0XXX in binary representation.
Note that setting the switch "On" or "Closed" corresponds to a "0" in the address, while leaving it "Off" or
"Open" corresponds to a "1".
The relative I/O address of the 8530 SCC registers is as follows:
Base+0 Channel A Data Port
• Base+1 Channel A Control Port
• Base+2 Channel B Data Port
• Base+3 Channel B Control Port
• Base+4 Board Control / Status Port
Where "Base" is the selected board base address.
ON
OFF
1 2
3
4
5
6
7
`
A9
A3
Figure 2

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Option Selection
The ACB-V contains several jumper straps which must be set for proper operation.
E2- This header selects DMA mode of operation. Channel A of the SCC can operate in either half-duplex or
full duplex DMA mode. Full duplex DMA can transmit and receive data simultaneously. Half-duplex DMA
can transmit or receive data, but not in both directions simultaneously. Both channels A and B can be used
in half-duplex mode. The various options for E1 and E2 jumper settings are as follows:
If DMA is not used, remove all of the jumpers on E1 and E2. Refer to Page 3 for the most
common DMA settings.
1 DACK 1 Or 3 Acknowledge For Two Channel Mode
2 Two Channel A/B Mode A3B1
3 Two Channel A/B Mode A1B3
4 On = Ch. A Only / Off = Ch. B Only
5 DACK 3 DMA Acknowledge Channel 3
6 DACK 1 DMA Acknowledge Channel 1
Figure 3
2 3 4 5 6 7 8
1 A or B Ch 3
2 A only Ch 3
3 A or B Ch 1
4 A only Ch 1
5 B Enable
6 A Full Duplex
7 DMA Always Enabled
8 Control Port Bit 7 Enables DMA (See Below)
Figure 4 Header E1 DMA Mode Options
Header E2 DMA Mode Options
E1
1
23456
E2

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E1: Positions 7 and 8 enable or disable DMA operation. A jumper “ON” position 7 permanently enables the
DMA tri-state drivers. A jumper “ON” position 8 places DMA under software control via the DMA enable
control port bit (located at Base+4). Removing the jumper disables the drivers, and no DMA can be
performed.
The power on reset signal disables the DMA enable signal. A jumer placed in position 7 of E1 will
override any software uses of the DMA enable / disable status port bit.
Commonly Used DMA Jumper Options
Option
E2
E1
Program 8530
No DMA Channel A or B.
None
None
N/A
Single Channel DMA (Half Duplex Only):
Ch.A DMA Ch.1 Half Duplex Ch.B
No DMA.
4,6
4
WAIT/REQ A
Ch.A DMA Ch.3 Half Duplex Ch.B
No DMA.
4,5
2
WAIT/REQ A
Ch.B DMA Ch.1 Half Duplex Ch.A
No DMA.
6 Only
3,5
WAIT/REQ B
Ch.B DMA Ch.3 Half Duplex Ch.A
No DMA
5 Only
1,5
WAIT/REQ B
Both DMA Channels (1 and 3) Selected:
Ch.A DMA Ch.1 Half Duplex Ch.B
DMA Ch.3 Half Duplex
1,3
1,4,5
WAIT/REQ A
WAIT/REQ B
Ch.A DMA Ch.3 Half Duplex Ch.B
DMA Ch.1 Half Duplex
1,2
2,3,5
WAIT/REQ A
WAIT/REQ B
Full Duplex Channel A with Both DMA Channels 1 and 3:
Ch.A DMA Ch.1 Receive Data Ch.A
DMA Ch.3 Transmit Data
1,4
1,4,6
WAIT/REQ A
DTR/REQ A
Ch.A DMA Ch.3 Receive Data Ch.A
DMA Ch.1 Transmit Data
1,4
2,3,6
WAIT/REQ A
DTR/REQ A
Channel B of the ACB-V does not support full duplex DMA.
Figure 5
E3: This header selects the interrupt request line for the port. The diagram below shows IRQ 5 selected in
a shared configuration. If no interrupt is desired, remove the jumper.
E3

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2
Selects IRQ2
3
Selects IRQ3
4
Selects IRQ4
5
Selects IRQ5
N
Selects Normal (1 IRQ Per Board) IRQ Mode
M
Selects "Multi-IRQ" (Shared) IRQ Mode
Figure 6
The factory default setting for E3 is: “5” and “M”.
EPROM Usage
The EPROM socket on the ACB-V is provided for convenience only and does not affect the communication
functions of the board in any way. If the EPROM is not used, the socket should be disabled (dip-switch SW2
position 5 off). The following table shows several EPROM base address examples.
The EPROM is a 27128 device occupying 16K bytes of memory at or above C800 Hex to be recognized by
the PC on boot up. Address lines A19, and A18 are always a binary 1, forcing a selection of C000 Hex or
greater.
Address Address Lines Switch position setting (SW1)
A17
A16
A15
A14
1
2
3
4
C000-C3FF
0
0
0
0
On
On
On
On
C400-C7FF
0
0
0
1
On
On
On
Off
C800-C9FF
0
0
1
0
On
On
Off
On
D000-D3FF
0
1
0
0
On
Off
On
On
D400-D7FF
0
1
0
1
On
Off
On
Off
D800-DBFF
0
1
1
0
On
Off
Off
On
E000-E3FF
1
0
0
0
Off
On
On
On
E400-E7FF
1
0
0
1
Off
On
On
Off
Figure 7 EPROM Address Examples
Some “AT” class machines cannot use addressee E000 and above.
Figure 8 illustrates the correlation between the dip-switch setting and the address bits used to determine
the base address.
Switch position 5 enables and disables the EPROM socket. The default setting is with the EPROM socket
disabled. The ACB-V will be shipped with the dip-switch in the configuration illustrated in Figure 8.
Figure 8 Dip-Switch Illustration (SW2)
1 2 3 4
ON
OFF
5

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Technical Description
Advanced Communications Board IV Specifications
The Sealevel ACB-V advanced communications board provides the PC with two high speed sync/async
ports. The ACB-V can be used in a variety of sophisticated communication applications such as SDLC,
HDLC, X.25, and high speed async. Features included on the card are:
•Two channels of sync / async communications using 8530 chip
•DMA supports data rate greater than 1 million bps (bits per second)
•Selectable Port Address, IRQ level (2,3,4,5), and DMA channel (1 or 3)
•CCITT V.35 interface with full modem control supports TD, RD, RTS, CTS, DSR, DCD, DTR,
TXC, RXC signals
•Jumper options for clock source
•Software programmable baud rate
•High Speed Enhanced Serial Communications Controller (85C30,85230) compatible
The ACB-V utilizes the ZILOG 8530 Serial Communications Controller (SCC). This chip features
programmable baud rate, data format and interrupt control, as well as DMA control. Refer to the 8530
technical manual, the ZILOG SCC user’s manual, and the ACB Developers Toolkit Diskette for details on
programming the SCC.
CCITT V.35
The Comite Consultatif Internationale de Telegraphie et Telephonie also known as the CCITT is the agency
that set the V.35 standard. V.35 specifies an electrical, mechanical, and physical interface that is used
extensively by high-speed digital carriers such as AT&T Dataphone Digital Service (DDS). CCITT V.35 is an
international standard that is often referred to as "Data Transmission at 48 Kbps Using 60 - 108 KHz Group-
Band Circuits." CCITT V.35 electrical characteristics are a combination of unbalanced voltage and balanced
current mode signals. Data and clock signals are balanced current mode circuits. These circuits typically
have voltage levels from 0.5 Volts to -0.5 Volts (1 Volt differential). The modem control signals are
unbalanced signals and are compatible with RS-232. The physical connector is a 34 pin connector that
supports 24 data, clock, and control signals. The physical connector is defined in the ISO-2593 standard.
CCITT V.35 is implemented with both DTE and DCE interfaces, the ACB-V is implemented using the DTE
interface. The ACB-V will not generate a clock signal without a modification. because the CCITT V.35
specification does not specify a clock output signal for a V.35 DTE. If an output clock signal is required for
the V.35 interface, please call Sealevel Systems Technical Support . The ACB-V is compatible with CCITT
V.36 and V.37.

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Programming the ACB-V Control/Status Port
The ACB-V occupies eight Input/Output (I/O) addresses. The first four are used by the SCC chip, while the
fifth address (Base+4) is the address of the on-board Control/Status Port. This port is used to set the Data
Terminal Ready (DTR) signal, to enable or disable DMA under software control, and to monitor the Data Set
Ready (DSR) input signals from the modem. The following table lists bit positions of the Control/ Status
port.
Bit:
Output Port Bits
Input Port Bits
0
DTR A 1=On, 0=Off
DSR A
1=On, 0=Off
1
DTR B 1=On, 0=Off
DSR B
1=On, 0=Off
2
Not Used
Not Used
1=On, 0=Off
3
Not Used
Not Used
1=On, 0=Off
4
Not Used
Not Used
1=On, 0=Off
5
Not Used
Not Used
1=On, 0=Off
6
Not Used
Not Used
1=On, 0=Off
7
DMA Enable 1=On, 0=Off
Not Used
1=On, 0=Off
Figure 11
Software Examples
Function
Program Bits
Turn On CH.A DTR
Write Out Base+4,XXXX XXX1
Turn On CH.B DTR
Write Out Base+4,XXXX XX1X
Turn Off CH.A DTR
Write Out Base+4,XXXX XXX0
Turn Off CH.B DTR
Write Out Base+4,XXXX XX0X
Enable DMA Drivers
Write Out Base+4,1XXX XXXX
Disable DMA Drivers
Write Out Base+4,0XXX XXXX
Test CH.A DSR
Read In Base+4, Mask=0000 0001
Test CH.B DSR
Read In Base+4, Mask=0000 0010
Figure 12
Assembly language programs should not do two successive I/O accesses, which violates the
8530 SCC recovery time specification. Please refer to the 8530 technical reference for more
details.
Correct: Incorrect:
MOV DX,3E0H MOV DX,3E0H
OUT DX,AL OUT DX,AL
JMP $+2 OUT DX,AL
OUT DX,AL

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Direct Memory Access
Direct Memory Access (DMA) can be used to transfer data at very high rates. DMA allows the ACB-V to
transfer data directly to or from system memory bypassing the CPU. The software examples provided on
the ACB Developer Toolkit diskette demonstrate the setup and use of DMA.
Internal Baud Rate Generator
The baud rate of the SCC is programmed under software control. The standard oscillator supplied with the
board is 4.9152 MHz. However, other oscillator values can be substituted to achieve different baud rates.
P1 and P2 Connector
The connector on the ACB-V is a DB-15. This connector is matched with a V.35 cable to provide the proper
mechanical connection as required by the ISO-2593 standard.
The connector for the SCC Channel A is labeled as P2 and is the bottom connector when the card
is installed in a socket. The connector for SCC Channel B is labeled P1 and is the top connector
when the card is installed in a socket
Signal
Name
DB-15
Pin #
V.35
Pin #
Mode
GND
Ground
8
B
TDB
TX+
Transmit Data
Positive
2
S
Output V.35
TDA
TX-
Transmit Data
Negative
9
P
Output V.35
RDB
RX+
Receive Data
Positive
4
T
Input V.35
RDA
RX-
Receive Data
Negative
11
R
Input V.35
TXCB
TXC+
Transmit Clock
12
AA
Input V.35
TXCA
TXC-
Transmit Clock
10
Y
Input V.35
RXCB
RXC+
Receive Clock
13
X
Input V.35
RXCA
RXC-
Receive Clock
14
V
Input V.35
CTS
CTS
Clear To Send
5
D
Input RS-232
DSR
DSR
Data Set Ready
6
E
Input RS-232
DCD
DCD
Data Carrier Detect
7
F
Input RS-232
RTS
RTS
Request To Send
3
C
Output RS-232
DTR
DTR
Data Terminal Ready
15
H
Output RS-232

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ACB Developer Toolkit Diskette and the ACB Resource Kit for DOS
The ACB Developer Toolkit software provides sample software for DOS and technical insight to aid in the
development of reliable applications and device drivers for the ACB family of communication cards. The
goal in publishing this collection of source code and technical information is two fold. First is to provide
the developer with ample information to develop ACB based applications. Second is to provide a channel
for suggestions into the technical support efforts. The ACB Resource Kit provides a brief overview of the
ACB product line. Topics concerning applications and integration are covered to provide a complete
overview of the versatile ACB family. During ACB development, any questions, comments, suggestions, or
to receive the ACB Resource Kit, please contact Technical Support at the numbers listed at the end of this
manual.

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Installation
Software Installation
Windows Installation
Do not install the Adapter in the machine until the software has been fully installed.
Only users running Windows 7 or newer should utilize these instructions for accessing and
installing the appropriate driver via Sealevel’s website. If you are utilizing an operating system
prior to Windows 7, please contact Sealevel by calling 864.843.4343 or emailing
[email protected] to receive access to the proper driver download and installation
instructions.
1. Begin by locating, selecting, and installing SeaMAC Synchronous Serial Suite software
from Sealevel’s website.
2. Select ‘Download SeaMAC’ for the OS which you are running.
3. The setup files will automatically detect the operating environment and install the proper
components. Follow the information presented on the screens that follow.
4. A screen may appear with text similar to: “The publisher cannot be determined due to the
problems below: Authenticode signature not found.” Please click the ‘Yes’ button and
proceed with the installation. This declaration simply means that the operating system is
not aware of the driver being loaded. It will not cause any harm to your system.
5. During setup, the user may specify installation directories and other preferred
configurations. This program also adds entries to the system registry that are necessary
for specifying the operating parameters for each driver. An uninstall option is also included
to remove all registry/INI file entries from the system.
6. The software is now installed, and you can proceed with the hardware installation.
All Sealevel Systems software drivers have been fully tested by Sealevel. Clicking ‘OK’ will not
harm your system.

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Environmental Specifications
Environmental Specifications
Specification Operating Storage
Temperature Range 0º to 50º C (32º to 122º F) -20º to 70º C (-40º to 100º F)
Humidity Range 0 to 90% R.H. Non-Condensing 0 to 90% R.H. Non-Condensing
Performance Specifications
MTBF > 150,000 Hours
MTTR < .25 Hours
Turnaround for repair 5 working days
Manufacturing Specifications
•Adherence to IPC 610-A Class-III standards with a 0.1 visual A.Q.L. and 100% functional testing.
•Boards are built to U.L. 94V0 rating and are 100% electronically tested. Most boards are solder
mask over bare copper.
Power Specifications
Supply line +5 VDC -5 ±12
Rating 450 mA 75 mA 50 mA

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Appendix A – Troubleshooting
The adapter should provide years of trouble-free service. However, in the event that device appears to not
be functioning incorrectly, the following tips can eliminate most common problems without the need to call
Technical Support.
1. Identify all I/O adapters currently installed in your system. This includes your on-board serial ports,
controller cards, sound cards etc. The I/O addresses used by these adapters, as well as the IRQ (if
any) should be identified.
2. Configure your Sealevel Systems adapter so that there is no conflict with currently installed
adapters. No two adapters can occupy the same I/O address.
3. Make sure the Sealevel Systems adapter is using a unique IRQ The IRQ is typically selected via an
on-board header block. Refer to the section on Card Setup for help in choosing an I/O address and
IRQ.
4. Make sure the Sealevel Systems adapter is securely installed in a motherboard slot.
5. If you are utilizing an operating system prior to Windows 7, please contact Sealevel‘s Technical
support as directed below to receive more information regarding the utility software which will
determine if your product is functioning properly.
6. Only users running Windows 7 or newer should utilize the diagnostic tool ‘WinSSD’ installed in the
SeaCOM folder on the Start Menu during the setup process. First find the ports using the Device
Manager, then use ‘WinSSD’ to verify that the ports are functional.
7. Always use the Sealevel Systems diagnostic software when troubleshooting a problem. This will
help eliminate any software issues and identify any hardware conflicts.
If these steps do not solve your problem, please call Sealevel Systems’ Technical Support, [phone].
Our technical support is free and available from 8:00 A.M.- 5:00 P.M. Eastern Time Monday through Friday.
For email support contact [e-mail].

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Appendix B – Safety Instructions
ESD Warnings
Electrostatic Discharges (ESD)
A sudden electrostatic discharge can destroy sensitive components. Proper packaging and grounding rules
must therefore be observed. Always take the following precautions:
1. Transport boards and cards in electrostatically secure containers or bags.
2. Keep electrostatically sensitive components in their containers, until they arrive at an
electrostatically protected workplace.
3. Only touch electrostatically sensitive components when you are properly grounded.
4. Store electrostatically sensitive components in protective packaging or on anti-static mats.
Grounding Methods
The following measures help to avoid electrostatic damages to the device:
1. Cover workstations with approved antistatic material. Always wear a wrist strap connected to a
properly grounded workplace.
2. Use antistatic mats, heel straps, and/or air ionizers for more protection.
3. Always handle electrostatically sensitive components by their edge or by their casing.
4. Avoid contact with pins, leads, or circuitry.
5. Turn off power and input signals before inserting and removing connectors or connecting test
equipment.
6. Keep work area free of non-conductive materials such as ordinary plastic assembly aids and
Styrofoam.
7. Use field service tools such as cutters, screwdrivers, and vacuum cleaners that are conductive.

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Appendix G – Compliance Notices
Federal Communications Commission (FCC) Statement
This equipment has been tested and found to comply with the limits for Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference in such case the user will be required to correct the
interference at the users expense.
EMC Directive Statement
Products bearing the CE Label fulfill the requirements of the EMC directive (89/336/EEC)
and of the low-voltage directive (73/23/EEC) issued by the European Commission. To obey
these directives, the following European standards must be met:
•EN55022 Class A - “Limits and methods of measurement of radio interference
characteristics of information technology equipment”
•EN55024 – “Information technology equipment Immunity characteristics Limits
and methods of measurement”.
This is a Class A Product. In a domestic environment, this product may cause radio interference in
which case the user may be required to take adequate measures to prevent or correct the
interference.
Always use cabling provided with this product if possible. If no cable is provided or if an alternate
cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC
directives.

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Warranty
Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime Warranty that is
standard on all Sealevel manufactured I/O products. We are able to offer this warranty due to our control
of manufacturing quality and the historically high reliability of our products in the field. Sealevel products
are designed and manufactured at its Liberty, South Carolina facility, allowing direct control over product
development, production, burn-in and testing. Sealevel achieved ISO-9001:2015 certification in 2018.
Warranty Policy
Sealevel Systems, Inc. (hereafter "Sealevel") warrants that the Product shall conform to and perform in
accordance with published technical specifications and shall be free of defects in materials and
workmanship for the warranty period. In the event of failure, Sealevel will repair or replace the product at
Sealevel's sole discretion. Failures resulting from misapplication or misuse of the Product, failure to adhere
to any specifications or instructions, or failure resulting from neglect, abuse, accidents, or acts of nature
are not covered under this warranty.
Warranty service may be obtained by delivering the Product to Sealevel and providing proof of purchase.
Customer agrees to ensure the Product or assume the risk of loss or damage in transit, to prepay shipping
charges to Sealevel, and to use the original shipping container or equivalent. Warranty is valid only for
original purchaser and is not transferable.
This warranty applies to Sealevel manufactured Product. Product purchased through Sealevel but
manufactured by a third party will retain the original manufacturer's warranty.
Non-Warranty Repair/Retest
Products returned due to damage or misuse and Products retested with no problem found are subject to
repair/retest charges. A purchase order or credit card number and authorization must be provided in order
to obtain an RMA (Return Merchandise Authorization) number prior to returning Product.
How to obtain an RMA (Return Merchandise Authorization)
If you need to return a product for warranty or non-warranty repair, you must first obtain an RMA number.
Please contact Sealevel Systems, Inc. Technical Support for assistance:
Available Monday – Friday, 8:00AM to 5:00PM EST
Phone [phone]
Email [e-mail]
Trademarks
Sealevel Systems, Incorporated acknowledges that all trademarks referenced in this manual are the service
mark, trademark, or registered trademark of the respective company.