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BiDirectionalBit - Specify BIOS control register bit that determines bidirectional operation

Description

BiDirectionalBit can be 5, 6, or 7. The default value is 5 because most parallel port hardware uses bit 5 of the BIOS control register to determine the direction (input or output) of port 0.

If port 0 is unable to input data, you need to configure the BiDirectionalBit value to 6 or 7. Typically, you will not know the bit value required by your port, and some experimentation is required.

Note   The Parallel Port adaptor will be deprecated in a future version of the toolbox. If you create a Data Acquisition Toolbox™ object for 'parallel' beginning in R2008b, you will receive a warning stating that this adaptor will be removed in a future release. See the supported hardware page at www.mathworks.com/products/daq/supportedio.html for more information.

Characteristics

Vendor	Parallel port
Usage	DIO, Common
Access	Read/write
Data type	Double
Read-only when running	Yes

Values

{5}, 6, or 7

The BIOS control register bit that determines bidirectional operation.

Device-Specific Properties — Alphabetical List

BitsPerSample

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