ASTRO VG-870, Instruction Manual, Page: 320 / 499

306
3.10 CHATRI4 [28H 29H]: Character plane triangle
drawing
Function: This command draws a triangle on the character plane.
Sequence: Type 2
Command:
STX 1 byte 02H
VG4CMD 1 byte FDH
CHATRI4 2 bytes 28H 29H
Coordinate X1 2 to 5 bytes Sign
code + “0” to “4095”
Sign
code: “0” = +, “1” = -
* -
2048 (“12048”) to +4096 (“04095”) in numerical
terms
, 1 byte 2CH (Delimiter)
Coordinate Y1 2 to 5 bytes Sign
code + “0” to “4095”
Sign
code: “0” = +, “1” = -
* -
2048 (“12048”) to +4096 (“04095”) in numerical
terms
, 1 byte 2CH (Delimiter)
Coordinate X2 2 to 5 bytes Same as coordinate X1
, 1 byte 2CH (Delimiter)
Coordinate Y2 2 to 5 bytes Same as coordinate Y1
, 1 byte 2CH (Delimiter)
Coordinate X3 2 to 5 bytes Same as coordinate X1
, 1 byte 2CH (Delimiter)
Coordinate Y3 2 to 5 bytes Same as coordinate Y1
, 1 byte 2CH (Delimiter)
Drawing mode 1 byte
“0” = Clear, “1” = Set
ETX 1 byte 03H
Fig. 3-10-1
When the drawing mode setting is omitted as below, the dot is drawn in the Set mode.
STX 1 byte 02H
VG4CMD 1 byte FDH
CHATRI4 2 bytes 28H 29H
Coordinate X1 2 to 5 bytes See above figure.
, 1 byte 2CH (Delimiter)
Coordinate Y1 2 to 5 bytes See above figure.
, 1 byte 2CH (Delimiter)
Coordinate X2 2 to 5 bytes See above figure.
, 1 byte 2CH (Delimiter)
Coordinate Y2 2 to 5 bytes See above figure.
, 1 byte 2CH (Delimiter)
Coordinate X3 2 to 5 bytes See above figure.
, 1 byte 2CH (Delimiter)
Coordinate Y3 2 to 5 bytes See above figure.
ETX 1 byte 03H
Fig. 3-10-2