Motorola DSP96002 - Manual (Page 603)

B-84 DSP96002 USER’S MANUAL MOTOROLA
OUTPUT
Address register r5 should point to a display list data area when the polyline generator is called. Afterwards,
the display list will be in the following format:
Polygon1: X1,Y1
X2,Y2
X3,Y3
Xn,Yn
Delimiter -1.0
Polygon2: X1,Y1
X2,Y2
Delimiter -1.0
PolygonM: X1,Y1
Xn,Yn
-2.0
All coordinates are in IEEE single-precision floating-point format to speed up the DSP96002 floating-point
incremental line drawing algorithm.
ADDRESS REGISTER USAGE
Four address registers are used:
r0 input list
r1 temporary coordinates
r4 transformation matrix, scale and offset for 2D transformation
r5 output list
r6 miscellaneous scratchpad memory