PAUSE

Syntax

PAUSE [timeout] or

PAUSE [#chan,] [timeout](Minerva v1.80+, THORv6.41, SMS, ST/QL E-init v1.27+)

Location QL ROM

The command PAUSE halts execution of a program temporarily for the specified timeout number of frames (there are 50 frames per second in the UK and Europe, 60 frames per second in the US). If no timeout or a negative timeout is specified, the command will wait indefinitely. If a timeout of zero is specified, no actual PAUSE will take place. Execution will continue at the end of the timeout, or if a key is pressed. The key is read from channel #0 and therefore the command will report the error ‘channel not open’ if #0 is not open.

The second variant of this command allows you to specify a channel #chan (default #0) upon which the command should operate, thus allowing the command to be used in programs which do not have #0 open.

Example

PAUSE 100

Pauses for approximately 2 seconds, unless a key is pressed in the meantime!

NOTE 1

Using timeouts allows programs to run at the same speed on all QL implementations.

NOTE 2

Normally, if #0 or the specified channel (in the THOR variant of this command) is not a console window (or not open), an error will be generated, of either ‘Bad Parameter’ or ‘Channel not open’ respectively. However, the Minerva and SMS variants of this command do not report any error messages and merely return straight away (although see next note).

NOTE 3

On Minerva (v1.90+), the second variant of this command will also work on a screen (scr_) channel.

NOTE 4

The second variant didn’t really work on ST/QL Emulators until v1.30 of E-Init).

CROSS-REFERENCE

INKEY$ allows you to read the key which has been pressed, as well as halting program execution.