New font

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The default text mode font is now aligned with CP437 and includes PETSCII and ATASCII semigraphics.

X65 text-mode font

I did my best to align the font with ASCII codes in the 0-31 range, which is why some symbols are in different places compared to the default VGA font of CP437.

I also placed box-drawing characters in the same locations as in CP437. (Almost - one character got moved.)

The remaining semigraphics are arranged in reasonable order, wherever there was place and the ordering seemed logical.