Posted By
Bionic
on 2003-10-30
|  Re: Out-border text (graphics :) )
You can extend the testscreen with some $ff1e tricks. The trick is that you have to invert any value you write into this reg. Also the timing has to by cycle exact.
It is possible to display a few extra characters in the border, however it seems that you can only display character $00 (@). Maybe some $ff1a/$1b and hires tricks may help here. You also have to deal with bad lines or avoid them by manipulating $ff1d or $ff1f.
Some additional horizontal cycles could be gained by "stealing" the refresh cycles...
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