QBasic 1.1: OUT Statement
Explanation
INP Function, OUT Statement
INP returns a byte read from a hardware I/O port.
OUT sends a byte to a hardware I/O port.
Worth knowing
Useful and cross-version information about the programming environments of QBasic, QuickBasic and Visual Basic for DOS.
Syntax
| INP(port%) |
| OUT port%, data% |
Description / Parameter(s)
| port% |
A number in the range 0 through 65,535 that identifies the port. |
| data% |
A numeric expression in the range 0 through 255 to send to the port. |
Example
x% = INP(&H3FC) 'Read COM1 Modem Control Register.
OUT &H3FC, (x% XOR 1) 'Change Data Terminal Ready bit.