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Chapter 4: Graphing Features
4 PxlON(
5 PxlOFF(
6 PxlCHG(
7 PxlTST(
106
PxlON(column, row)
Draws a pixel point at a given screen location indicated
by column and row.
The column and row definitions are as follows:
Column: 0 to 132,
Row: 0 to 64.
column
(0, 0)
row
(0, 62)
64
PxlOFF(column, row)
Erases a pixel point at a given screen location indicated
by column and row.
PxlCHG(column, row)
Changes the status (i.e., visible/invisible) of a pixel at a
given screen location indicated by column and row.
PxlTST(column, row)
Returns "1" if a pixel point is present at a given screen
location indicated by column and row.
Returns "0" if no pixel point exists.
132
(126, 0)
(126, 62)
This area cannot be specified
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