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--- writing_20to_20vdu_20variables [2018/03/31 13:19] – external edit 127.0.0.1
+++ writing_20to_20vdu_20variables [2024/01/05 00:21] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 =====Writing to VDU variables=====
-//by Richard Russell, April 2009//\\ \\  The main [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwin2.html#vduvars|Help documentation]] recommends that the **VDU variables** be treated as //read-only// values, which are modified only by means of the related VDU commands or associated keywords. However, to achieve certain special effects, or in advanced applications, it may be appropriate to write to those variables. This should be done with care, if unwanted side-effects are not to result.\\ \\  The table below lists the **VDU variables**, why you might want to write to them, and the main precautions which need to be considered when doing so:\\ \\
+//by Richard Russell, April 2009//\\ \\  The main [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwin2.html#vduvars|Help documentation]] recommends that the **VDU variables** be treated as //read-only// values, which are modified only by means of the related VDU commands or associated keywords. However, to achieve certain special effects, or in advanced applications, it may be appropriate to write to those variables. This should be done with care, if unwanted side-effects are not to result.\\ \\  The table below lists the **VDU variables**, why you might want to write to them, and the main precautions which need to be considered when doing so:
 ^ Variable(s)\\ ^ Reason(s) to write\\ ^ Precautions\\ ^
@@ Line 21: / Line 21: @@
 | @vdu.m.c&\\ | Set insert/overtype mode (bit 0) in INPUT replacement, e.g. see NOWAIT.BBC\\ | Change bit(s) 'atomically' using OR= or AND= (or assembler equivalents)\\ |
 | @vdu.m.d&\\ | Set scrolls-until-pause independently of text viewport height\\ | 0 = no paging, &80+n = pause after n scrolls\\ |
-\\  This article is not intended to be exhaustive; side-effects not mentioned here may be experienced when writing to **VDU variables**. Do so at your own risk.
+This article is not intended to be exhaustive; side-effects not mentioned here may be experienced when writing to **VDU variables**. Do so at your own risk.