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Disclosed is a programming concept which improves the performance for a display service.
English (United States)
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Display Performance Improvement
Disclosed is a programming concept which improves the performance for a
For improved performance during IBM 3101 and Digital VT100
terminal emulation, bits were set and tested at various points to
determine when none, part or all of the display was to be updated.
Based on tests, code was not executed which was not necessary.
Several display conditions were focussed on to set these bits:
1) Display Initialization - Bits set so entire display
would be updated initially.
2) Cursor Movement - Bits set so new cursor position
would get updated on display and only code involved would be
3) No Change To Display - Bits set so display would not
be updated and code involved would not be executed. In most
cases, after display gets updated, the "no change" value is
assigned to bits.
4) Partial Display Updates - Any change in
minimum/maximum variables cause bits to be set.
5) Full Screen Updates - Bits set when functions cause
entire display to be updated.
Significant performance improvements are realized using this philosophy.
Two bits were used to achieve this goal and several variables assisted.