| [Overview][Procedures and functions] | Reference for unit 'x86' (#rtl) |
Read bytes from a PC port
Source position: line 0
function ReadPortB( |
Port: LongInt |
):Byte; |
Port: LongInt; |
var Buf; |
Count: LongInt |
); |
The procedural form of ReadPortB reads Count bytes from port Port and stores them in Buf. There must be enough memory allocated at Buf to store Count bytes.
The functional form of ReadPortB reads 1 byte from port B and returns the byte that was read.
Note that you need permission to read a port. This permission can be set by the root user with the FpIOPerm call.
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Set permission on IO ports |
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Read data from a PC port |
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Read Words from a PC port |
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Read longints from a PC port |
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Write data to PC port |
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Write byte to PC port |
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Write longint to PC port. |
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Write Word to PC port |
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