Difference between revisions of "VDU 0"
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Revision as of 01:13, 8 March 2015
The null character.
| Syntax | VDU 0
|
| Keyboard equivalent | CTRL @ |
| Character stream (hex) | 00
|
| Description | Does nothing. |
Description
VDU 0 prints the ASCII character NUL. NUL does nothing. It is usually used to complete a VDU sequence that has been created intentionally or accidentally.
When the display drivers are in an unknown state, they can be reset by printing nine NULs. This is guaranteed to fill any outstanding queue, and any excess NULs are harmless. In BASIC V, the VDU n| syntax sends these NULs conveniently.
-- beardo 00:03, 25 September 2007 (BST)
