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0
Null Operation
16
Clear graphics window
1
Send next char to printer
17
Set text colour
2
Enable printer
18
Set graphics colour and action
3
Disable printer
19
Set palette
4
Split text, graphics cursors
20
Restore default colours
5
Join text, graphics cursors
21
Disable screen output
6
Enable screen output
22
Change screen mode
7
Bell
23
Misc
8
Back space
(move left) 24
Define graphics window
9
Horizontal tab
(move right) 25
Plot
10
Line feed
(move down) 26
Restore default windows
11
Vertical tab
(move up) 27
Null Operation
12
Form feed/clear screen
28
Define text window
13
Carriage return
29
Set graphics origin
14
Page mode on
30
Home
15
Page mode off
31
Position text cursor
127
Delete
See also:
OS_ReadVDUVariables
Scroll protection
Output stream status
VDU status
Unknown VDU23 vector
Unknown plot vector
VDU extension vector
OS_Plot
VDU commands manual
v2.04, 12 Nov 2016
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