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Left Hand Pointer

Side-Effects on $X and $Y

1977 Version of ANSI Standard

Right Hand Pointer

3.5.5 Side Effects on $X and $Y

READ and WRITE transfer characters one at a time, certain characters or character combinations represent device control functions, depending on the identity of the current device. To the extent that the supervisory function can detect these control characters or character sequences, they will alter $X and $Y as follows.

graphic: add 1 to $X
backspace: set $X = max($X–1,0)
line feed: add 1 to $Y
carriage return: set $X = 0
form feed: set $Y = 0, $X = 0
Button for 1977 Button for 1984 Button for 1990 Button for 1995 Button for MDC Button for notes Button for examples

Copyright © Standard Documents; 1977-2018 MUMPS Development Committee;
Copyright © Examples: 1995-2018 Ed de Moel;
Copyright © Annotations: 2003-2008 Jacquard Systems Research
Copyright © Annotations: 2008-2018 Ed de Moel.

This page most recently updated on 13-Sep-2014, 08:55:55 .

For comments, contact Ed de Moel (demoel@jacquardsystems.com)