notBD 0.1 - Bitmapped screen demo -- "Scrolling"

["Andrew Davie" <atari2600@xxxxxxxxxxxxx>]

Here's a very early testbed of 3E bankswitched bitmap graphics, implemented 
as a 10x10 character window into a 128 character x 20 character map.  The 
map size is arbitrary, limited only by RAM.  Speed is very slow, but I have 
some major speedups coming (really!).  There are some glitches on the 
screen -- areas I'm avoiding writing for now, for reasons to do with 
memory/access issues with RAM and page boundary crossing.
The zip file has the latest source, NTSC and PAL demos, and a screenshot.
Note, the graphics are arbitrary mockups, and there's a woofin screen shake 
there, which I currently am unable to find.  Have a look at the source code, 
though -- it's an amazing system in action.  There may be a lot of dead-wood 
in there, and don't believe all the comments :)
Those with Krokodile Kart, or Cuttle Cart 2 will be able to view the 
binaries -- or those with the rumoured Z26 that supports 3E mode.  All 
others will have to drool over the screenshot ;)
Cheers
A

Attachment: NOTBD10JAN2005.zip
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