National Instruments 3.22E+04 用户手册

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About This Manual
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Bold text in this font denotes the messages and responses that the computer 
automatically prints to the screen. This font also emphasizes lines of code 
that are different from the other examples.
PCI serial boards
PCI serial boards refers to all port versions of the PCI serial boards.
Related Documentation
The following documents contain information that you might find helpful 
as you read this manual:
ANSI/EIA-232-D Standard, Interface Between Data Terminal 
Equipment and Data Circuit-Terminating Equipment Employing 
Serial Binary Data Interchange
EIA/RS-422-A Standard, Electrical Characteristics of Balanced 
Voltage Digital Interface Circuits
EIA-485 Standard, Standard for Electrical Characteristics of 
Generators and Receivers for Use in Balanced Digital 
Multipoint Systems
Microsoft Win32 Software Developer Kit, Online Documentation for 
Win32 OverviewsWin32 Reference, and Microsoft Programmer’s 
Guide to Windows 98/95
, Microsoft Corporation
NS16550AF Universal Asynchronous Receiver/Transmitter with 
FIFOs
, National Semiconductor
ST16C654 Asynchronous Receiver/Transmitter with FIFOs
EXAR Corporation