| Data Acquisition Toolbox | |
Specify the 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.
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. |
| | Properties - Alphabetical List | BitsPerSample | |