Re: $D012 values on C64

From: silverdr_at_wfmh.org.pl Date: Thu, 20 Jun 2013 11:57:46 +0200 Message-Id: <D4731B8A-C20D-430F-92ED-FAC0DB4C2383@wfmh.org.pl>

On 2013-06-20, at 11:34, Michał Pleban wrote:

> I tried the raster line trick and it works well - the bytes are written
> to the Flash when VIC draws the border and the screen is intact. But
> there is another problem, however :-( To write to the Flash, I need
> first to erase a 4kB sector, which takes about 25ms (according to the
> chip specs). That means that the screen is garbled for about one video
> frame per each sector erased, and this cannot be avoided.
> 
> Therefore I think I'll just copy the CHAR data to RAM during chip
> prgoramming.

As long as you have enough RAM available, I think this is the most sound idea. Move charset to RAM, switch VIC away from the ROM, do the flashing, restore original settings.

-- 
SD!
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