B B Electronics Computer Hardware 232CC1A User Manual

This manual covers the following B&B Electronics' model serial  
cards:  
RS-232 Serial Cards CE  
232CC1A 232CC1B  
232CC2A 232CC2B  
Documentation Number 232CCxx4502  
Each of these models is an RS-232 serial card and uses the same printed circuit  
board. The "1" and "2" suffix designates the number of ports on the card. The model  
number of the card is printed on a sticker on the board.  
This product designed and manufactured in Ottawa, Illinois USA  
of domestic and imported parts by  
International Headquarters  
B&B Electronics Mfg. Co. Inc.  
707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350 USA  
Phone (815) 433-5100 -- General Fax (815) 433-5105  
Home Page: www.bb-elec.com  
Sales e-mail: [email protected] -- Fax (815) 433-5109  
Technical Support e-mail: [email protected] -- Fax (815) 433-5104  
European Headquarters  
B&B Electronics Ltd.  
Westlink Commercial Park, Oranmore, Co. Galway, Ireland  
Phone +353 91-792444 -- Fax +353 91-792445  
Sales e-mail: [email protected]  
Technical Support e-mail: [email protected]  
© B&B Electronics -- Revised November 2002  
Documentation Number 232CCxx4502  
Cover Page  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Chapter 1: Introduction and General Information  
The B&B Electronics’ 232CC series RS-232 serial interface  
cards are designed for the IBM PC, XT, AT and compatibles. Ports  
are configured as a standard DTE device, and connections are  
made on 9-pin D-style connectors.  
The 232CC cards offer exceptional setup flexibility. The 232CC  
series has the ability to use any I/O address and any hardware  
interrupt. You can install as many serial ports as will physically fit in  
a machine. To use one of the “non-standard” addresses or  
interrupts, the serial software used must also offer that flexibility. If  
you are writing your own application, be sure the communications  
routines used support any address and IRQ. B&B Electronics’  
SimpCom Communications Drivers support these features.  
Features  
Switch selectable addresses, from 0 to hex 3F8, including  
COM1 – COM4  
Jumper selectable interrupts: 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15  
Enhanced 16 bit address decoding  
Baud rates up to 230.4K baud with 2X clock option enabled  
16550A UARTs on all ports  
Supports all standard RS-232 lines: TD, RD, RTS, CTS, DSR, DCD,  
DTR, and RI  
Specifications  
Bus: IBM PC ISA bus  
Slot: Requires 1 full length slot for complete IRQ selectability. When  
installed in a short slot, IRQ’s 10-15 will not be available.  
Dimensions: 6.3 x 3.3 in (16.0 x 8.4cm)  
I/O connection: 9-pin male, D-sub connectors  
Baud rates: 230,400 baud max with 2x clock jumper enabled  
Character length: 5, 6, 7, or 8 bits  
Parity: Even, odd or none  
Stop bits: 1, 1.5, or 2  
Interrupt: IRQ 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, or 15  
Address: Switch programmable, 0 to hex 3F8  
Documentation Number 232CCxx4502  
1
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B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
RS-232 Transceiver  
TD and RD Device: DS232AS  
Transmitter output voltage: 5.0 V minimum  
Short circuit current: 30 mA typical  
Input low level threshold voltage: 0.8 V minimum  
Input high level threshold voltage: 2.4V maximum  
Device will withstand 30 V  
Handshake Line Device: SN75185  
Transmitter output voltage: 10.0 V minimum  
Short circuit current: 12 mA typical  
Input low level threshold voltage: 0.65 V minimum  
Input high level threshold voltage: 2.5V maximum  
Device will withstand 30 V  
Power Consumption (2-port model)  
+5V, 115mA, 575mW  
+12V, 50mA, 600mW  
-12V, 72mA, 864mW  
Total maximum power draw: 2.039 W  
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Documentation Number 232CCxx4502  
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B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Chapter 2: Quick Installation Guide  
The following steps will help you install the Model 232CCXX Serial  
Card. Please follow (step-by-step) the numbered instructions and  
refer to any corresponding chapters for more details.  
CAUTION: Electrostatic Sensitive Device.  
Use ESD precautions for safe handling.  
Before removing the card from the anti-static protective packaging:  
Discharge any static electricity build-up on your body by  
touching a large grounded metal surface or the metal chassis  
on equipment connected to earth ground by a 3-wire power  
cord.  
Avoid touching the gold connectors or other parts on the card  
except as necessary. After setting the jumper, ground yourself  
to the computer chassis before and while inserting the card.  
Remove AC power from the computer and unplug the power  
cord before inserting the card.  
Retain the ESD bag for handling the card. Save the packaging  
for storage or shipping.  
1. Make sure you have an available ISA slot for installing your  
B&B Electronics Serial Card. You may have to remove the  
cover of your PC.  
2. Determine what addresses and IRQ’s are free to use on your  
PC by checking your operating system for unused addresses  
and IRQ’s. Each port uses eight I/O address spaces starting at  
the base address that you select. Each port I/O address and  
interrupt request (IRQ) must be set as well. See “Checking  
Device Manager for Available Address/IRQ’s” in Chapter 3 for  
your operating system. Refer to Chapter 4 (Table 3) for  
frequently unused I/O addresses and IRQ’s. Write down the  
address and IRQ you select to use. Do not physically install the  
ISA card at this point.  
3. Add New Hardware – This consists of adding a port or ports to  
your operating system. See “Adding Serial Ports” in Chapter 3  
for specific instructions for your operating system.  
Documentation Number 232CCxx4502  
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4. Assign Address and IRQ – The address and IRQ are set in the  
operating system that you are using. This is the final step of  
adding new hardware. See Chapter 4 for more details.  
5. Set up the address (with dipswitches) and IRQ (jumpers) on the  
serial card to reflect unused addresses and IRQ’s that you want  
to use. The address dipswitch setting consists of configuring  
seven dipswitches that reflect a particular hex address. The IRQ  
is set via a little black jumper. See Chapter 4 for an explanation  
of address and IRQ settings as well as details on configuring  
the card itself.  
6. Set serial card hardware jumpers for the communication  
parameters that you desire. See Chapter 5 for an explanation of  
serial parameters and details on how to configure them.  
7. Shut down the PC before installing the serial card.  
8. Install ISA serial card into an available ISA slot in the PC.  
9. Physical Hook-up and Troubleshooting – pinout, cable data, and  
troubleshooting information. See Chapter 6 for more details.  
4
Documentation Number 232CCxx4502  
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Chapter 3: Windows Installation  
Checking Device Manager for Available  
Address/IRQ’s (Windows 95/98)  
Click on Start / Settings / Control Panel and double-click on System  
Properties.  
Left-click on Device Manager.  
Double-click on Computer.  
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Left-click on Interrupt Request.  
Find a free IRQ in the displayed list. Any number that is seen on  
the left hand side of this screen is an IRQ that is currently being  
used. The object is to find a number of IRQ(s) that are not listed  
and set your port(s) using those IRQ’s.  
Left-click on Input/Output (I/O).  
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Documentation Number 232CCxx4502  
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Scroll through the list, check 03F8H, 02F8H, 03E8H, 02E8H. If  
one of these is available, use it. If not, check alternates.  
Find a free address in the list. Most desktop PC’s have a COM1  
and possibly a COM2 already on their system which will be seen in  
the list. You might have to start at COM3 or COM4 to begin  
addressing the ISA card. If these addresses are used you may have  
to resort to the Frequently Unused Port Addresses (found in  
Chapter 4, Table 3) of this manual. Write these open addresses and  
IRQ’s down for later reference.  
Documentation Number 232CCxx4502  
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B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Adding Serial Port(s) in Windows 95/98  
Go to Start Menu / Settings / Control Panel.  
Run the Windows Add New Hardware utility found in the control  
panel. Click Next.  
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Click Next.  
Select Yes/No, (for) the device in the list. Click Next.  
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Select No (you do not want Windows to search for your new  
hardware). Click Next.  
Select Ports (COM & LPT). Click Next.  
10  
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Select (Standard port types) and Communication Port. Click Next.  
Documentation Number 232CCxx4502  
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The next screen will show the address and interrupt request of  
the port. These may not match your configuration. For now, simply  
click Next. Windows may ask for the Windows 95/98 disk/CD to be  
inserted.  
Finally, click Finish.  
12  
Documentation Number 232CCxx4502  
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Changing COM Port Resources in Windows 95/98  
Click Start / Settings / Control Panel and double-click on System  
Properties.  
Click on Device Manager (make sure “View devices by type” is  
enabled.  
Double-click on Ports (COM & LPT).  
Documentation Number 232CCxx4502  
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Double-click on the new port that has been added.  
Click Resources.  
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Documentation Number 232CCxx4502  
Click off (check mark out of box) Use Automatic Settings.  
Select Basic Configuration 0007 (or last one).  
Select Input / Output Range.  
Click Change Setting.  
Change Address to match the free address settings you found  
earlier.  
Click OK.  
Select Interrupt Request.  
Click Change Settings.  
Change IRQ to match the free IRQ settings you found earlier.  
At this point you can shut down the system and physically install  
your B&B Electronics Serial Card into an available ISA slot. Double  
check to make sure the addresses and IRQ’s on the Serial Card are  
set to the correct settings.  
Documentation Number 232CCxx4502  
15  
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B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Checking Windows NT Diagnostics for Available  
Address/IRQ’s (Windows NT 4.0)  
Click on Start / Programs / Administrative Tools / Windows NT  
Diagnostics.  
Left-click on Resources.  
Find a free IRQ in the following list. Any number that is seen on  
the left hand side of this screen is an IRQ that is currently being  
used. The object is to find a number of IRQ(s) not listed and set  
your port(s) using those IRQ’s.  
Left-click on I/O Port in Resources. Tab to view currently used  
addresses.  
16  
Documentation Number 232CCxx4502  
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B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Scroll through the list, checking 03F8H, 02F8H, 03E8H, 02E8H.  
If one of these is available, use it. If not, check alternates.  
Find a free address in the list. Most desktop PC’s have a COM1  
and possibly a COM2 already on their system, which will be seen in  
the list. You may have to start at COM3 or COM4 to start your  
addressing of the ISA card you have. If these addresses are used  
you may have to resort to the Frequently Unused Port Addresses  
(found in Chapter 4, Table 3) of this manual. Write these open  
addresses and IRQ’s down for later reference.  
Documentation Number 232CCxx4502  
17  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Adding Serial Port(s) in Windows NT 4.0  
Go to Start Menu / Settings / Control Panel.  
Double-click on Ports.  
Click Add.  
Choose COM Port Number, Base I/O Address, and IRQ that  
you want to use for the new Serial Port(s) being added.  
After clicking OK, you will see a screen – System Setting  
Change. Click the button Restart Now to restart Windows NT 4.0.  
At this point you can shut down the system and physically install  
your B&B Electronics Serial Card into an available ISA Slot. Double  
check to make sure the addresses and IRQ’s on the Serial Card are  
set to the correct settings.  
18  
Documentation Number 232CCxx4502  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Checking Windows 2000 for Available Address/IRQ’s  
Click on Start / Settings / Control Panel.  
Double-click on System.  
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Click on Hardware.  
20  
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Click on Device Manager.  
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Click on View (top of screen).  
Click on Resources by type.  
Double-click on Input/Output. Find an unused address to set your  
B&B Electronics serial card to.  
Scroll through the list, checking 03F8H, 02F8H, 03E8H, 02E8H.  
If one of these is available, use it. If not, check alternates.  
Find a free address in the list. Most desktop PC’s have a COM1  
and possibly a COM2 already on their system, which will be seen in  
the list. You may have to start at COM3 or COM4 to begin  
addressing the ISA card that you have. If these addresses are used  
you may have to resort to the Frequently Unused Port Addresses  
(found in Chapter 4, Table 3) of this manual. Write these open  
addresses and IRQ’s down for later reference.  
22  
Documentation Number 232CCxx4502  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Double-click on Interrupt Request (IRQ). Here you need to find an  
unused IRQ to set your B&B Electronics serial card to.  
Documentation Number 232CCxx4502  
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Adding Serial Port(s) in Windows 2000  
Go to Start Menu / Settings / Control Panel.  
Double-click on Add/Remove Hardware.  
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Documentation Number 232CCxx4502  
Click Next.  
Click on Add/Troubleshoot a device.  
Click Next.  
The following screen will appear after a few seconds.  
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Click Add a new device.  
Click Next.  
Click No, I want to select the hardware from a list.  
26  
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Documentation Number 232CCxx4502  
Click Ports (COM & LPT).  
Click Next.  
Select Standard port types and Communication Port and Click  
Next. You will see the following screen, go ahead and Click OK.  
Documentation Number 232CCxx4502  
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The Resources area will allow you to set the IRQ and Address  
of your new ports.  
Click on the down arrow to the middle right of the screen after  
“Setting based on”:  
Click on the highest Basic configuration number in the list on the  
“Setting based on” category.  
28  
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Double-click on the Input/Output Range to set the Address.  
Double-click on the Interrupt Request to set the IRQ.  
Select IRQ and Address that you want your port(s) configured at.  
Documentation Number 232CCxx4502  
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At this point you can shut down the system and physically install  
your B&B Electronics Serial Card into an available ISA Slot. Double  
check to make sure the addresses and IRQ’s on the Serial Card are  
set to the correct settings.  
30  
Documentation Number 232CCxx4502  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Chapter 4: Address and IRQ Setting  
Address Switch Setup  
A Windows PC has I/O port addresses and memory addresses.  
Some devices use both types of addresses. I/O port addresses  
have a 64K address space. Devices may decode all 16 address bits  
or only some of the lower bits. Traditionally, serial cards have only  
decoded 10 bits of the address bus. Recently this has begun to  
cause address conflicts with full 16 bit decoded devices, most  
notably between video cards and COM 4. B&B has solved these  
conflicts by decoding all 16 bits of the ISA address bus. Address  
settings in our ISA bus serial cards is set by DIP switches (selecting  
bits 11-4) or jumpers.  
CAUTION : Electrostatic Sensitive Device.  
Use ESD precautions for safe handling.  
B&B Electronics 232CC cards are factory configured for COM1  
IRQ4, and COM2 IRQ3 (2-port models). If you plan to install the  
232CC as standard COM1 and COM2, you may leave the address  
and IRQ set to the factory defaults.  
The 232CC cards use a 7-position DIP switch to program the  
binary I/O address of each port on the card. Figure 1 is a drawing of  
the printed circuit board that shows the locations of the setup  
switches and jumpers on the 232CC cards.  
Documentation Number 232CCxx4502  
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Figure 1. Silk Screen Plot of 232CC PCB  
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When setting the address (via the dipswitch) use the silkscreen  
on the printed circuit board. This silkscreen shows a “1” and a “0” --  
referring to the “on and “off” states that each switch is set to. Switch  
S1 configures port one (labeled J1) and, on two port cards, switch  
S2 configures port two (labeled J2). Least significant bit (LSB) and  
most significant bit (MSB) are labeled on the card. Table 1 shows  
the numerical weight and electrical connection of each switch  
position. Refer to Table 2 for COM Port addresses. Table 3 shows  
frequently unused port addresses for applications when COM Port  
addresses 1-4 are already used.  
Table 1. Address Switches  
Switch Position  
7
6
5
4
3
2
1
Bus Connection SA9 SA8 SA7 SA6 SA5 SA4 SA3  
Decimal Weight  
Hex Weight  
512 256  
200 100  
128 64  
80 40  
32  
20  
16  
10  
8
8
To install the 232CC card as COM1, 2, 3, or 4, follow the switch  
settings shown in Table 2. To install at another address, follow the  
switch settings shown in Table 3.  
Table 2. Standard Port Addresses  
Base Hex  
Address  
Binary  
Equivalent  
Switch Settings  
MSB  
LSB  
7654321  
COM1  
COM2  
COM3  
COM4  
3F8  
2F8  
3E8  
2E8  
1111111000  
1011111000  
1111101000  
1011101000  
1111111  
1011111  
1111101  
1011101  
Documentation Number 232CCxx4502  
33  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Table 3. Frequently Unused Port Addresses  
Base  
Hex  
Address  
Binary  
Equivalent  
Switch  
I/O Space  
Description  
Settings  
MSB  
LSB  
7654321  
1000000  
1000001  
1100000  
1100001  
1100010  
1100011  
1110000  
1110001  
1110100  
1110101  
200  
208  
300  
308  
310  
318  
380  
388  
3A0  
3A8  
1000000000  
1000001000  
1100000000  
1100001000  
1100010000  
1100011000  
1110000000  
1110001000  
1110100000  
1110101000  
game port  
game port  
prototype  
prototype  
prototype  
prototype  
SDLC  
SDLC  
bisync com  
bisync com  
Interrupt Jumper Setup  
The IRQ is a hardware Interrupt Request line in an ISA Bus  
expansion slot on a PC or AT compatible computer. The 8 bit PC  
ISA slot has 8 interrupts, the 16 bit slot has another 7 since one of  
the first 8 is used to link in the remaining 8. The IRQ is used by  
devices to request immediate service by the main microprocessor.  
When the IRQ line is set, the microprocessor stops whatever it’s  
doing, saves status, checks which line was set, then jumps to code  
to handle the interrupt. The processor then clears the interrupt and  
returns to what it was doing before. IRQ lines are set by the internal  
timer, keyboard, hard drive controller, PCI, USB controller, sound  
card, serial ports, printer and more.  
The 232CC cards allow the use of interrupts (IRQ) 2, 3, 4, 5, 6,  
7, 10, 11, 12, 14, and 15. Table 4 shows the standard serial port  
IRQ settings. NOTE: If two ports use the same IRQ setting, both  
ports cannot use the serial port at once. Only one port at a time may  
communicate.  
Table 4. Standard IRQ Settings  
COM1  
COM2  
COM3  
COM4  
IRQ4  
IRQ3  
IRQ4  
IRQ3  
34  
Documentation Number 232CCxx4502  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Chapter 5: Communication Jumper Settings  
This chapter will cover all of the jumper settings to set your B&B  
Serial Card for the proper communications that you desire.  
CAUTION : Electrostatic Sensitive Device.  
Use ESD precautions for safe handling.  
High Speed Mode  
The 232CC Serial has only two communication jumpers  
referring to clock speed. High data rates may be obtained with the  
232CC cards by placing JP1 or JP2 in the *2 position. This  
multiplies the clock speed supplied to the UARTs by 2 times to  
3.684MHz for Ports 1 and 2 respectively, allowing data rates up to  
230.4 KBaud. Note that serial software is not aware of the change  
in oscillator frequency. For example, with JP5 in the *2 position,  
setting the baud rate to 115.2 KBaud in software will result in a  
actual baud rate of 230.4 KBaud. It is also important to realize that  
simply increasing the baud rate may not increase actual throughput.  
Often, due to the computer’s inability to respond to interrupts quickly  
enough, there will be large idle spaces between characters.  
Increasing the baud rate to this point will reduce allowable cable  
length, and increase the potential for data errors.  
Documentation Number 232CCxx4502  
35  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Chapter 6: Physical Hook-up and Troubleshooting  
This chapter will cover 232CC pinout, communication cable  
data, and troubleshooting information.  
Pinouts  
The 232CC Serial Cards are wired as DTE (Data Terminal  
Equipment) devices. The 232CC Serial Cards can be connected  
directly to DCE (Data Communication Equipment) devices with a  
straight through cable. If you need to connect two DTE devices, you  
will need a null modem cable or cross-over cable.  
Pin  
1
2
Name  
DCD  
RD  
Description  
Direction  
input  
input  
Data Carrier Detect  
Receive Data  
Transmit Data  
3
TD  
output  
4
5
6
7
8
9
DTR  
Gnd  
DSR  
RTS  
CTS  
RI  
Data Terminal Ready output  
Signal Ground  
Data Set Ready  
Request to Send  
Clear to Send  
Ring Indicator  
------  
input  
output  
input  
input  
Table 5. Pinout Description  
Communication Cable Data  
The 232CC Serial Card communicates using RS-232  
communications only. The communication cable specifications are  
24AWG (wire gauge) and 30pF/ft. (capacitance rating). B&B  
Electronics can provide this communication cable, Model ETC8195.  
36  
Documentation Number 232CCxx4502  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Troubleshooting  
If you are unable to communicate with the card from your software:  
1. Consult your software manual to make sure it supports the  
address and interrupt that you have configured.  
2. Double check that the address and interrupt are properly set.  
3. Try another software package for troubleshooting. Download  
SimpTerm (DOS Terminal Emulator) or Comtest (Windows  
Terminal Emulator) from B&B Electronics’ web site. SimpTerm  
and Comtest are shareware Simple Terminal Emulators which  
can be used to vary the setup of any serial card. Both can be  
downloaded from the following site location:  
4. Troubleshooting with a Loopback Test.  
Load Simpterm or Comtest on the test PC. When loading  
Simpterm you must set up the port address and IRQ you have set  
on the B&B Electronics serial card.  
Jumper TD to RD on the DB9 male connector located on the  
serial card. You may have to make a “loopback connector” in order  
to do this. This is done by jumpering pin 2 and pin 3 of a DB9  
female connector and plugging it into the DB9 male port on the  
serial card.  
To test the RS-232 handshake lines you can also jumper RTS  
to CTS and DTR to DSR. When you raise the RTS line you should  
see CTS also go high. When you raise the DTR line you should see  
DSR also go high.  
Send data from the Serial Port (B&B Electronics serial card) and  
see if the data is echoed back to the port. When a character is typed  
on the keyboard you must see a duplicate character after the first  
character to verify that the same character was received. Perform  
this test on all ports of your serial card to verify the ports can (or  
cannot) transmit and receive data.  
5. Call B&B Electronics' Technical Support at the number/s shown  
below:  
International/USA Office:  
(815) 433-5100, 8a.m. - 5:00 p.m. weekdays (Central USA Time).  
European Office:  
+353 91-792444, 8a.m. – 4:30 p.m. weekdays (UK).  
Documentation Number 232CCxx4502  
37  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Appendix A: Hardware I/O Map  
I/O Map of XT Class Machines  
Hex Address  
000-00F  
020-021  
040-043  
060-063  
080-083  
0A0-0AF  
200-20F  
210-217  
2E8-2EF  
2F8-2FF  
300-31F  
320-32F  
378-37F  
380-38F  
3B0-3BF  
3D0-3D7  
3E8-3EF  
3F0-3F7  
3F8-3FF  
Address Function in XT Class Machines  
DMA controller (8237A)  
interrupt controller (8259A)  
timer (8253)  
PPI(8255A)  
DMA page register (74LS612)  
NMI - non maskable interrupt  
game port joystick controller  
expansion unit  
COM4 serial port  
COM2 serial port  
prototype card  
hard disk  
parallel print  
SDLC  
MDA - monochrome adapter and printer  
CGA - color graphics adapter  
COM3 serial port  
floppy diskette controller  
COM1 serial port  
Documentation Number 232CCxx4502  
Appendix A: Hardware I/O  
A-1  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
I/O Map of AT Class Machines  
Hex Address  
000-01F  
020-03F  
040-05F  
060-06F  
070-07F  
080-09F  
0A0-0BF  
0C0-0DF  
0F0-0FF  
1F0-1F8  
200-20F  
258-25F  
278-27F  
2E8-2EF  
2F8-2FF  
300-31F  
378-37F  
380-38F  
3A0-3AF  
3B0-3BF  
3BC-3BE  
3C0-3CF  
3D0-3D7  
3E8-3EF  
3F0-3F7  
3F8-3FF  
Address Function in AT Class Machines  
DMA controller #1 (8237A-5)  
interrupt controller #1 (8259A)  
timer (8254)  
keyboard (8042)  
NMI - non maskable interrupt & CMOS RAM  
DMA page register (74LS612)  
interrupt controller #2 (8259A)  
DMA controller #2 (8237A)  
80287 math coprocessor  
hard disk  
game port joystick controller  
Intel Above Board  
parallel printer port 2  
COM4 serial port  
COM2 serial port  
prototype card  
parallel printer 1  
SDLC or bisync com 2  
bisync com 1  
MDA - monochrome adapter  
parallel printer on monochrome adapter  
EGA - reserved  
CGA - color graphics adapter  
COM 3 serial port  
floppy diskette controller  
COM1 serial port  
Any eight-byte space not used by one of the devices listed in  
the table and not used by any other equipment in your system may  
be used for the serial port.  
A-2  
Appendix A: Hardware I/O  
Documentation Number 232CCxx4502  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  
Appendix B: Declaration of Conformity Statement  
DECLARATION OF CONFORMITY  
Manufacturer’s Name:  
B&B Electronics Manufacturing Company  
Manufacturer’s Address:  
P.O. Box 1040  
707 Dayton Road  
Ottawa, IL 61350 USA  
232CC1A, 232CC1B, 232CC2A, 232CC2B  
RS-232 Serial Cards  
Model Numbers:  
Description:  
Type:  
Light industrial ITE equipment  
89/336/EEC  
EN 50082-1  
Application of Council Directive:  
Standards:  
EN 61000 (-4-2, -4-3, -4-4, -4-6)  
William H. Franklin III, Director of Engineering  
Documentation Number 232CCxx4502  
Declaration of Conformity  
B-1  
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104  
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445  

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