ASTRO VG-871 - GELPS [D6 H]: Ellipse Drawing; CELPS [D7 H]: Ellipse Clearing

Chapter 5 INDIVIDUAL DRAWING COMMAND FORMATS
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5.15 GELPS [D6H]: Ellipse drawing /
CELPS [D7H]: Ellipse clearing
5.15.1 GELPS [D6H]: Ellipse drawing
Function: This command draws an ellipse on the graphic plane (1-bit plane).
The center coordinates and radii of the ellipse are set by the parameters.
Sequence: Type 2
Command:
STX
1 byte
02H
GELPS, CELPS
1 byte
D6H, D7H
Center coordinate X
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 coordinate Y
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 RX
1 to 4 bytes
“1” to “4095”
Data delimiter
1 byte
“, “
Radius RY
1 to 4 bytes
“1” to “4095”
ETX
1 byte
03H
Fig. 5-15-1