VIDC20 Data Sheet
CD[5] I CU[1] I ED[5] I ED[J]
	0 0	BPD[5]	BPD[4]
	0 I	0	0
	I 1 I 0	f BPD[S]	BPD[4] I
	._		1
	I t		
Table 5: Deriving high speed 2 bit cursor data from the normal 8 bit output- CD[4&5]
CD[3] I CD(2j I ED[3] I ED[2]
	0 0	BPD[3]	BPD[2]
	0 I	0	0
	I 0	BPD[3]	BPD[2]
	I ~ 1	~ 1	~ 1
Table 6: Deriving high speed 2 bit cursor data from the normal 8 bit output • CD[2&3]
	cD[1] CD[O] I ED[11	I ED[Bl
	0 0 BPD[I]	.
	BPD[0]
	0	l	0	0
	I	0	BPD[I]	BPD[0]
	1	1	~	1
Table 7: Deriving high speed 2 bit cursor data from the normal 8 bit output- CD[0&1]
So if the external circuit serialises ED[6,4,2,0] into a single bit stream, or ED[7:0] into a 2-bit data stream then the cursor can be positioned and defined to any micro-pixel: in each case the cursor can be transparent, black or white. If all 8 bits are serialised into a single very high frequency bit stream, then the cursor can nnly be positioned and defined to units of 2 micro-pixels.