COMM+2.cPCI USER MANUAL
Contents
1. Make sure the Sealevel Systems adapter is securely installed in a motherboard slot When running DOS or Windows 3 x refer to the supplied Sealevel Software and this User Manual to verify that the Sealevel Systems adapter is configured correctly This software contains a diagnostic program SSD that will verify if an adapter is configured properly This diagnostic program is written with the user in mind and is easy to use For Windows 95 98 ME NT 2000 XP the diagnostic tool WinSSD is 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 Always use the Sealevel Systems diagnostic software when troubleshooting a problem This will eliminate any software issues from the equation Sealevel Systems COMM 2 cPCI Page 11 Appendix B How To Get Assistance Appendix B How To Get Assistance Please refer to Appendix A Troubleshooting prior to calling Technical Support 1 Read this manual thoroughly before attempting to install the adapter in your system 2 When calling for technical assistance please have your user manual and current adapter settings If possible please have the adapter installed in a computer ready to run diagnostics 3 Sealevel Systems maintains a Home page on the Internet Our home page address is www sealevel com The latest software updates and newest manuals are avail2. ground to determine binary logic states The RS 232 and the EIA TIA 574 specification define two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The COMM 2 cPCT is a DTE device RS 422 The RS 422 specification defines the electrical characteristics of balanced voltage digital interface circuits RS 422 is a differential interface that defines voltage levels and driver receiver electrical specifications On a differential interface logic levels are defined by the difference in voltage between a pair of outputs or inputs In contrast a single ended interface for example RS 232 defines the logic levels as the difference in voltage between a single signal and a common ground connection Differential interfaces are typically more immune to noise or voltage spikes that may occur on the communication lines Differential interfaces also have greater drive capabilities that allow for longer cable lengths RS 422 is rated up to 10 Megabits per second and can have cabling 4000 feet long RS 422 also defines driver and receiver electrical characteristics that will allow 1 driver and up to 32 receivers on the line at once RS 422 signal levels range from 0 to 5 volts RS 422 does not define a physical connector Sealevel Systems COMM 2 cPCI Page 13 Appendix C Electrical Interface RS 485 RS 485 is backwardly compatible with RS 422 however it is optimized for party line or multi drop ap
3. assembles the bits back into a character Data rate error checking handshaking and character framing start stop bits are pre defined and must correspond at both the transmitting and receiving ends Asynchronous communications is the standard means of serial data communication for PC compatibles and PS 2 computers The original PC was equipped with a communication or COM port that was designed around an 8250 Universal Asynchronous Receiver Transmitter UART This device allows asynchronous serial data to be transferred through a simple and straightforward programming interface A start bit followed by a pre defined number of data bits 5 6 7 or 8 defines character boundaries for asynchronous communications The end of the character is defined by the transmission of a pre defined number of stop bits usually 1 1 5 or 2 An extra bit used for error detection is often appended before the stop bits Idle state of Odd Even ine 5 to 8 Data Bits oo aak i EE de EE er Loa o J b 6 J L L d4 L i 1 jouw 11 map 1 504 k Figure 3 Asynchronous Communications Bit Diagram This special bit is called the parity bit Parity is a simple method of determining if a data bit has been lost or corrupted during transmission There are several methods for implementing a parity check to guard against data corruption Common methods are called E ven Parity or O dd Parity Sometimes parity is not used to detect errors on the data stre
4. c5 m as em Ee EN Il Clack Selection ria R21 ce U7 c16 B5 BS R2 gt gt R23 ug aid 614 BEREG E EE U4 Ss H z EE z gt Re E PCi903a a zs E H Sa uo BE Ed 215 gt R27 c2 xe C22 Hg CB MICS2P9 33 C12 te EE R3B R39 R40 R41 R42 uie C18 P2 R32 C24 031 BB B C32 C33 epy a ooo poa Doo Doo ooo Doo Doo ooo ooo poa poo goeqgVvseggang aADoa pDDOO D Doe 0000 DOOD pDoo Pope DOOD oc000 booo Poe Page 16 Sealevel Systems COMM 2 cPCI Appendix F Compliance Notices Appendix F Compliance Notices Federal Communications Commission Statement FCC 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 his own expense EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directive 89 336 EEC and of the low voltage d
5. single port to determine if an interrupt is pending The ISP is at Base 7 on each port Example Base 280 Hex Status Port 287 28F etc The COMM 2 cPCI will allow any one of the available locations to be read to obtain the value in the status register Both status ports on the COMM 2 cPCI are identical so any one can be read Example This indicates that Channel 2 has an interrupt pending Bit Position 7 6 5 4 3 2 1 0 Value Read O IO O JO JO JO 1 0 Sealevel Systems COMM 2 cPCI Page 8 Connector Pin Assignments RS 232 f z Transmit Data g Technical Description Mode Output ju RTS DTR Request To Send Data Term Ready Output nje GND Ground RD Receive Data nw DCD Data Carrier Detect DSR Data Set Ready Input Input Input Co ON CIS Clear To Send RI Ring Indicator Input Note These assignments meet EIA TIA ANSI 574 DTE for DB 9 type connectors Technical Note Please terminate any control signals that are not going to be used The most common way to do this is connect RTS to CTS and RI Also connect DCD to DTR and DSR Terminating these pins if not used will help insure you get the best performance from your adapter RS 422 485 GND Ground Transmit Data Positive Transmit Data Negative 5 4 Output Request To Send Positive Request To Send Negative 3 Output 6 Output Receive Data Positive Receive Data Negati
6. use misuse of or inability to use this product Sealevel Systems will not be liable for any claim made by any other related party RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems Incorporated 155 Technology Place P O Box 830 Liberty SC 29657 USA 864 843 4343 FAX 864 843 3067 www sealevel com email support sealevel com Technical Support is available from 8 a m to 5 p m Eastern time Monday Friday Trademarks Sealevel Systems Incorporated acknowledges that all trademarks referenced in this manual are the service mark trademark or registered trademark of the respective company Sealevel Sealevel Software and Sealevel Systems are registered trademarks of Sealevel Systems Incorporated ULTRA COMM 2 cPCT is a trademark of Sealevel Systems Incorporated Sealevel Systems COMM 2 cPCI Page 18
7. I settings below Electrical Specification Port 1 Port 2 Sealevel Systems COMM 2 cPCI Page 1 Card Setup Card Setup RS 485 Enable Modes RS 485 is ideal for multi drop or network environments RS 485 requires a tri state driver that will allow the electrical presence of the driver to be removed from the line The driver is in a tri state or high impedance condition when this occurs Only one driver may be active at a time and the other driver s must be tri stated The output modem control signal Request To Send RTS is typically used to control the state of the driver Some communication software packages refer to RS 485 as RTS enable or RTS block mode transfer One of the unique features of the COMM 2 cPCI is the ability to be RS 485 compatible without the need for special software or drivers This ability is especially useful in Windows Windows NT and OS 2 environments where the lower level I O control is abstracted from the application program This ability means that the user can effectively use the COMM 2 cPCI in a RS 485 application with existing i e standard RS 232 software drivers Switches SW1 and SW2 are used to control the RS 485 mode functions for the driver circuit The selections are Auto enable switch position 1 or RTS enable switch position 2 The Auto enable feature automatically enables disables the RS 485 interface The RTS mode uses the RTS modem control signal to enable th
8. SEALEVEL SYSTEMS INCORPORATED COMM 2 cPCI USER MANUAL mias A di an i Sealevel Systems Inc 155 Technology Place P O Box 830 Liberty SC 29657 USA m TEE Part 7901 Phone 864 843 4343 FAX 864 843 3067 www sealevel com Contents BE AE Ed EE OE ts 1 WHAT INCLUDED e du e de ee he 1 FACTORY DEFAULT SETTINGS ocococcconnononnononnononcnonananonononaononancanaconnacones 1 CARD SETUP ssse siese ses se se se so ed des be ee dd ee sod de be Ge Ge oe geo Ge be Gee see 2 RS 485 ENABLE MODES ees esse see ese ees ese ee ee ee ee ee Re ee Re Re ee ee 2 LNE TERMINATION mi EES ee colle ee ee Geek ee ee eg ee N Be eg de 3 ELECTRICAL INTERFACE SELECTION ees ese see ee ees een ee ee ese ee ee ee ee 4 CLOCK MODES esse see ee ee ene ee ee Re ee Re ee ee Re ee ee Re ee ee ee 4 INSTALLATION ss osse se case deeg diana O OPERATING SYSTEM INSTALLATION eeuse see ee ee eene ee ee ee ene ee ee ee 6 For Windows USETS ese ese ee ee ee ee ee ee ee 6 Other Operating Systems eieiei tan ee ee Ge Ge Re Ge 6 SYSTEM INSTALLATION eeuse sesse ese eene ee ee ee Re ee ee Re ee ee Re ee ee ee 6 INTERRUPTS EE ie ee GE RE GE oe Ee eee 7 WHY USEANISPY tonta de se gee oes tale 8 CONNECTOR PIN ASSIGNMENTS scssesscessesseesscesecesscesscesscseessesseenseens 9 AS EO EE EE EN 9 RSA A DER GR GE EE Re EE ee Ee 9 SPECIFICATIONS sies sees Gee ie eb ee eo reinar LO ENVIRONMENTAL SPECIFICATIONS ee ee sesse esse e
9. able via our FTP site that can be accessed from our home page 4 Technical support is available Monday to Friday from 8 00 a m to 5 00 p m eastern time Technical support can be reached at 864 843 4343 RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION RMA NUMBER Sealevel Systems COMM 2 cPCI Page 12 Appendix C Electrical Interface Appendix C Electrical Interface RS 232 Quite possibly the most widely used communication standard is RS 232 This implementation has been defined and revised several times and is often referred to as RS 232 or EIA TIA 232 The IBM PC computer defined the RS 232 port on a 9 pin D sub connector and subsequently the EIA TIA approved this implementation as the EIA TIA 574 standard This standard is defined as the 9 Position Non Synchronous Interface between Data Terminal Equipment and Data Circuit Terminating Equipment Employing Serial Binary Data Interchange Both implementations are in wide spread use and will be referred to as RS 232 in this document RS 232 is capable of operating at data rates up to 20 Kbps at distances less than 50 ft The absolute maximum data rate may vary due to line conditions and cable lengths RS 232 is a single ended or unbalanced interface meaning that a single electrical signal is compared to a common signal
10. am This is refereed to as N o parity Because each bit in asynchronous communications is sent consecutively it is easy to generalize asynchronous communications by stating that each character is wrapped framed by pre defined bits to mark the beginning and end of the serial transmission of the character The data rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends The communication parameters are baud rate parity number of data bits per character and stop bits i e 9600 N 8 1 Sealevel Systems COMM 2 cPCI Page 15 Appendix E Silk Screen Appendix E ilk creen 7901 El E3 PORT 31 R5422 RS232 om o O o o o a o o o ollo o o o Gjo osse o ol Slo o ZO o o DIO o 2o o olzle 9 o o o o D o o o o o o o o O o o o o o oo o PORT2 J2 oa o o o o o o oo o 8 o o o o Ool o o 909 k0 o o O5 2 o o o Oo o o o o o o oo o o o o o O o oo o o o Oo o R5422 R5232 C E E2 E4 R33 R34 R353 R36 R37 BEER sd C13 017 SL ui 25 US PORT2 EB yg PORT Ba Se BEBEEEEAABB BABBAEEBEEE Swi Y a 16550 16558 X AE T ES Z JJ ES Boo Beds ee NE66886868888 8888888 8E 6 SE c11 a oS ea SW3 AE O DN1 7 XC9572XL 2 oj DNB S Rig C4 E p O DNT ag moeg p ol ona R24
11. apter for Compact PCI compliant machines It provides two field selectable RS232 422 485 serial ports supporting data rates up to 460 8K bps in RS 232 mode and 921 6K bps in RS 422 485 mode Configure both ports as RS232 for standard serial COM port requirements Choose the RS 422 mode for long distance device connections up to 4000ft where noise immunity and high data integrity are essential Select RS 485 and capture data from multiple peripherals in a RS485 multi drop network Up to 31 RS 485 devices can be connected to each port to automate your data collection You can even mix the ports in any of the interface combinations to provide maximum flexibility to your application In both RS 232 and RS 422 modes the card works seamlessly with the standard operating system serial driver In RS 485 mode our special auto enable feature allows the RS485 ports to be viewed by the operating system as a COM port This allows the standard COM driver to be utilized for RS485 communications Our on board hardware automatically handles the RS 485 driver enable What s Included The COMM 2 cPCI is shipped with the following items If any of these items are missing or damaged contact the supplier e ULTRA COMM 2 cPCI Serial VO Adapter e Sealevel Software Factory Default Settings The COMM 2 cPCI factory default settings are as follows Electrical Specification Port 1 RS 232 Port 2 RS 232 For your reference record installed COMM 2 cPC
12. e RS 422 RS 485 receiver circuit Receive data only Adds or removes the IK ohm pull down resistor in the RS 422 RS 485 receiver circuit Receive data only Adds or removes the 120 ohm termination Connects the TX to RX for RS 485 two wire operation Connects the TX to RX for RS 485 two wire operation Figure 1 Factory Default setting for SWI and SW2 RS 422 Sealevel Systems COMM 2 cPCI Page 3 Card Setup Address and IRQ selection The COMM 2 cPCI is automatically assigned I O addresses and IRQs by your motherboard BIOS Only the I O address may be modified by the user Adding or removing other hardware may change the assignment of VO addresses and IRQs Electrical Interface Selection Each port on the COMM 2 cPCI has the ability to be used in either RS 232 or RS 422 485 This is selectable via four 24 pin DIP shunts at E1 E4 Please use the following illustration to aid in the configuration of your electrical interface a b RS B RS cl cc a EN E a RS Be RS E RS ae HALL RS 232 RS 422 485 Port 1 Port 1 Port 2 Port 2 Figure 2 Headers El E4 Electrical Interface Selection Clock Modes The COMM 2 cPCI employs a unique clocking option that allows the end user to select from divide by 8 and divide by 1 clocking modes These modes are selected at dipswitch SW3 To select the Baud rates commonly associated with COM ports i e 2400 4800 9600 19 2 115 2K Bps select the DIV8
13. e RS 485 interface and provides backward compatibility with existing software products Position 3 Echo of SW1 and SW2 is used to control the RS 485 enable disable functions for the receiver circuit and determine the state of the RS 422 485 driver The RS 485 Echo is the result of connecting the receiver inputs to the transmitter outputs Every time a character is transmitted it is also received This can be beneficial if the software can handle echoing i e using received characters to throttle the transmitter or it can confuse the system if the software does not To select the No Echo set this switch to On For RS 422 compatibility set switches 1 2 and 3 to Off Sealevel Systems COMM 2 cPCI Page 2 Card Setup Line Termination Typically each end of the RS 485 bus must have line terminating resistors RS 422 terminates at the receive end only A 120 ohm resistor is across each RS 422 485 input in addition to a 1K ohm pull up pull down combination that biases the receiver inputs Switches SW1 and SW2 also allow the user to customize this interface to their specific requirements Each jumper position corresponds to a specific portion of the interface If multiple COMM 2 cPCI adapters are configured in a RS 485 network only the boards on each end should have jumpers Term PU amp PD ON Refer to the following table for each position s operation Function Adds or removes the 1K ohm pull up resistor in th
14. e ee eene ee ee ee ee 10 MANUFACTURING osse sees eseee Gee ee Sies bede bees Bee Ee gee Ee gee EES EES Eed Ee 10 POWER CONSUMPTION ccsccsscesscscesscesecsecesscessesscesscsscssceascsssenseesaes 10 MEAN TIME BETWEEN FAILURES MT BP ccscesesssseseeseeseceeesees 10 PHYSICAL DIMENSIONS renei 10 APPENDIX A TROUBLESHOOTING ccccccssssssssssssssssssssseees LL APPENDIX B HOW TO GET ASSISTANCE cccccccscsccscsscesecees 12 APPENDIX C ELECTRICAL INTERFACE cccccccccsscsccscssseeeee 13 RS EG EE EEEE E aa 13 RS 2422 is OE EE ER EE OR OE A aS 13 RA EE EN EE EE EE ER EE ENE 14 APPENDIX D ASYNCHRONOUS COMMUNICATIONS 00066 15 APPENDIX E SILK SCREEN ccccccscssscssssscscscscscscscscssscscscsees LO APPENDIX F COMPLIANCE NOTICES cccscscssscssscscscscscscseee 17 FEDERAL COMMUNICATIONS COMMISSION STATEMENT sesse ese 17 EMC DIRECTIVE STATEMENT esse see ese ese ee ee ee ee ee ee ee ee ee 17 WARRANTY sedes De GR GE Geek Dee GE HO oe ee Se Ge Ne be ge be Se ee obese LO Figures Figure 1 Factory Default setting for SW1 and SW2 RS 422 sssessee 3 Figure 2 Headers El F4 Electrical Interface Selection s 0sseeeee 4 Figure 3 Asynchronous Communications Bit DiagraM o oooommmmmmmo 15 2002a Sealevel Systems Incorporated All rights reserved Introduction Introduction Overview The Sealevel Systems COMM 2 cPCI is a two channel serial I O ad
15. es the 16850 UART This chip features programmable baud rates data format interrupt control and a 128 byte input and output FIFO Interrupts A good description of an interrupt and its importance to the IBM PC can be found in the book Peter Norton s Inside the PC Premier Edition One of the key things that makes a computer different from any other kind of man made machine is that computers have the capability to respond to the unpredictable variety of work that comes to them The key to this capability is a feature known as interrupts The interrupt feature enables the computer to suspend whatever it is doing and switch to something else in response to an interruption such as the press of a key on the keyboard A good analogy of a PC interrupt would be the phone ringing The phone bell is a request for us to stop what we are currently doing and take up another task speak to the person on the other end of the line This is the same process the PC uses to alert the CPU that a task must be preformed The CPU upon receiving an interrupt makes a record of what the processor was doing at the time and stores this information on the stack this allows the processor to resume its predefined duties after the interrupt is handled exactly where it left off Every main sub system in the PC has it s own interrupt frequently called an IRQ short for Interrupt ReQuest The following IRQ table will define the system IRQs as wel
16. irective 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 EN60950 1EC950 Safety of information technology equipment including electrical business equipment Warning 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 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 Sealevel Systems COMM 2 cPCI Page 17 Warranty Warranty Sealevel Systems Inc provides a limited lifetime UFETIME warranty Should this product fail to be in good working order at any time during this period Sealevel Systems will at it s option replace or repair it at no additional charge except as set forth in the following terms This warranty does not apply to products damaged by misuse modifications accident or disaster Sealevel Systems assumes no liability for any damages lost profits lost savings or any other incidental or consequential damage resulting from the
17. l as show typically free IRQs In these early days of PC s Sealevel Systems decided that the ability to share IRQs was an important feature for any add in I O card Consider that in the IBM XT the available IRQs were IRQO through IRQ7 Of these interrupts only IRQ2 5 and IRQ7 were actually available for use This made the IRQ a very valuable system resource To make the maximum use of these system resources Sealevel Systems devised an IRQ sharing circuit that allowed more than one port to use a selected IRQ This worked fine as a hardware solution but presented the software designer with a challenge to identify the source of the interrupt The software designer frequently used a technique referred to as round robin polling This method required the interrupt service routine to poll or interrogate each UART as to its interrupt pending status This method Sealevel Systems COMM 2 cPCI Page 7 Technical Description of polling was sufficient for use with slower speed communications but as modems increased their through put abilities this method of servicing shared IRQs became inefficient Why use an ISP The answer to the polling inefficiency was the Interrupt Status Port ISP The ISP is a read only 8 bit register that sets a corresponding bit when an interrupt is pending Port 1 interrupt line corresponds with Bit DO of the status port Port 2 with D1 etc The use of this port means that the software designer now only has to poll a
18. plications The output of the RS 422 485 driver is capable of being Active enabled or Tri State disabled This capability allows multiple ports to be connected in a multi drop bus and selectively polled RS 485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second The signal levels for RS 485 are the same as those defined by RS 422 RS 485 has electrical characteristics that allow for 32 drivers and 32 receivers to be connected to one line This interface is ideal for multi drop or network environments RS 485 tri state driver not dual state will allow the electrical presence of the driver to be removed from the line Only one driver may be active at a time and the other driver s must be tri stated RS 485 can be cabled in two ways two wire and four wire mode Two wire mode does not allow for full duplex communication and requires that data be transferred in only one direction at a time For half duplex operation the two transmit pins should be connected to the two receive pins Tx to Rx and Tx to Rx Four wire mode allows full duplex data transfers RS 485 does not define a connector pin out or a set of modem control signals RS 485 does not define a physical connector Sealevel Systems COMM 2 cPCI Page 14 Appendix D Asynchronous Communications Appendix D Asynchronous Communications Serial data communications implies that individual bits of a character are transmitted consecutively to a receiver that
19. position To select the maximum data rate 921 6K bps select the DIV1 position Sealevel Systems COMM 2 cPCI Page 4 Card Setup Sealevel Systems COMM 2 cPCI Page 5 Installation Installation Operating System Installation For Windows Users Start by choosing Install Software at the beginning of the CD Choose Asynchronous COM Port Software SeaCOM Other Operating Systems Refer to the appropriate section of the Sealevel Software System Installation The adapter can be installed in any of the 3U cPCI expansion slots and contains configuration options for each port that must be set for proper operation For 6U systems an adapter is available from Sealevel Systems 1 2 3 4 Turn off PC power Disconnect the power cord Locate an available cPCI slot and remove the blank metal slot cover Gently insert the adapter into the slot Make sure that the adapter is seated properly and the locking mechanism is locked The adapter is also equipped with two mounting screws that may also be used Connect the power cord Installation is complete Sealevel Systems COMM 2 cPCI Page 6 Technical Description Technical Description The Sealevel Systems COMM 2 cPCI provides a cPCI interface adapter with 2 asynchronous serial ports providing a versatile interface field selectable as RS 232 for modems printers and plotters as well as RS 422 485 for industrial automation and control applications The COMM 2 cPCI utiliz
20. ve 7 Output 1 Input CTS CTS Clear To Send Negative 8 Input Clear To Send Positive Sealevel Systems COMM 2 cPCI 2 Input 9 Input Page 9 Specifications Specifications Environmental Specifications Temperature Range 0 to 50 C 20 to 70 C 32 to 122 F 4 to 158 F Humidity Range 10 to 90 R H 10 to 90 R H Non Condensing Non Condensing Manufacturing e All Sealevel Systems Printed Circuit boards are built to U L 94V0 rating and are 100 electrically tested These printed circuit boards are solder mask over bare copper or solder mask over tin nickel Power Consumption Supply line 12VDC 12VDC 5 VDC 350 mA Mean Time Between Failures MTBF Greater than 150 000 hours Calculated Physical Dimensions The adapter conforms to the requirements of a 3U Adapter as set forth by the PCI SIG Sealevel Systems COMM 2 cPCI Page 10 Appendix A Troubleshooting Appendix A Troubleshooting Sealevel Software is supplied with the Sealevel Systems adapter and will be used in the troubleshooting procedures Using this Software and following these simple steps 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
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