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Graphics
Parameters
Parameters come from columns 2 and 3 of the ASCII table (SPACE through ?). Most parame-
ters are simply the ASCII numeric characters used to represent data coordinates or to select
one ofseveral settings. Binary formatted data is generated by appending the bits 0 1 to five bits
of binary data. Note that in binary formats, spaces are treated as data and are not ignored or
used as delimiters. Both ASCII and binary data formats are described later in this section.
Parameters precede their associated commands (postfix notation). The most frequently used
parameters are vector data. Refer to the discussion of Vectors for additional information on
parameters used to define vector operations.
Examples:
commands
""
~
Ec
*
m 2a 7b
256,195
J
~~
preamble
parameters
command
end sequence
~
""
Ec
* P
f
100, 100, 200, 200Z
~ ~
preamble
parameters
The programmable graphics functions are organized into the following groups.
• Display Control
• Cursor Control
• Plotting Sequences
• Vector Data Formats
• Relocatable Origin
• Line Types
• Area Fills
• Drawing Modes
• Graphics Defaults
• Graphics Text
• Compatibility Mode
• Graphics Status Requests
The remainder of this section contains descriptions of each of these functional groups.
D-6
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