ASTRO VG-877 - Chapter 5 INDIVIDUAL DRAWING COMMAND FORMATS

Chapter 5 INDIVIDUAL DRAWING COMMAND FORMATS
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5.2 GCIRCPA [D4H]: Filled-in circle drawing /
CCIRCPA [D5H]: Filled-in circle clearing
5.2.1 GCIRCPA [D4H]: Filled-in circle drawing
Function: This command draws a filled-in circle on the graphic plane (1-bit plane).
The center coordinates and radius of the circle are set by the parameters.
Sequence: Type 2
Command:
STX
1 byte
02H
GCIRCPA, CCIRCPA
1 byte
D4H, D5H
Center X coordinate
2 to 5 bytes
Sign code + “0” to “4095” e.g. 100 “0100”
Sign code: “0” = +, “1” = -
*-2048 (“12048”) to +4096 (“04095”) in numerical
terms
Data delimiter
1 byte
“, “
Center Y coordinate
2 to 5 bytes
Sign code + “0” to “4095” e.g. 100 “0100”
Sign code: “0” = +, “1” = -
*-2048 (“12048”) to +4096 (“04095”) in numerical
terms
Data delimiter
1 byte
“, “
Radius
1 to 4 bytes
“1” to “4095”
ETX
1 byte
03H
Fig. 5-2-1
* A sign code is provided for each of the center coordinates.