Mov_Draw_VLc_b ($F3B1)
This routine moves to the first location specified in vector list, and then draws lines between the rest of coordinates in the list. The vector list has the following format:
rel y, rel x, rel y, rel x, ...
ENTRY:
DP = $D0
B-reg = scale factor
$C823 = number of vectors to draw
X-reg points to the vector list
EXIT:
X-reg points to next byte after list
D-reg, X-reg trashed
$C823 is cleared