OSBYTE &05

From BeebWiki

OSBYTE &05 (5) - Select the printer type.

On entry, A=&05, X=new printer output

Controls which printer output device will be used when output is sent to the printer. This does not activate and send data to the printer. VDU 2 must be used to start output going to the selected printer channel.

The value of X is made up as follows:

Value	Meaning if set
0	Selects a printer sink where characters can be lost without the possibility of the system 'hanging' with a full printer buffer.
1	Selects output to the parallel output connector.
2	Selects the serial RS423 output.
3	Selects a user-supplied printer driver.
4	Selects the Econet printer.