help with DHR, follow up

[Cyrus Roton <croton@ridgecrest.ca.us>]

I think the problem I was having was related to the need to read data 
bytes from both banks in order to update the data for subsequent points 
and then re-write the new data.

I have gotten around that problem by building the screen bytes in 
temporary memory locations, and then, after four bytes (seven pixels) are 
stuffed, i write those bytes into the proper place in screen memory. 
While I was at it, I went to using a lookup table to find the screen byte 
addresses (rather than calculating them). Not only does the thing work 
better now, but it is much faster.

I should soon have this Mandelplot package ready for distribution via the 
net (freeware). 

Cyrus Roton   croton@ridgecrest.ca.us
Ridgecrest Apple User Group