IVP wrote:
>> Drawing a line from 1,0 to 1,240 sets bytes 0 to 239 to 0x02, erasing=20
>> the first line
>>    =20
>
> If I understand you, the new data should be IORed with or added to
> the existing ? Or 8 lines should be drawn at once with FF ?
>
> Joe
>  =20

Assuming that his demo code does actually write to 0 to 239 for the=20
first 8 lines (as opposed to having an actual line algorithm), then he=20
could write a 1 to those locations, then a 3, then a 7, then 0x0F, 0x1F,=20
0x3F, 0x7F and finally 0xFF, then move to the next 8 lines at 240 to=20
479.  This would draw the lines 1 at a time, preserving previously drawn=20
lines and confirming that this is, indeed, the problem.

Kerry

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.