ASTRO VG-871 - WINCLR4 [28 H 63 H]: Window Plane Clear

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3.34 WINCLR4 [28H 63H]: Window plane clear
Function: This command clears the window plane.
Sequence: Type 2
Command:
STX
1 byte
02H
VG4CMD
1 byte
FDH
WINCLR4
2 bytes
28H 63H
ETX
1 byte
03H
Fig. 3-34-1