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- # 6/8 bit columns and smaller fonts
-
- If your glyphs, including padding, are 6 or 8 pixels wide,
- you're in luck because pushing them to the LCD can be done in a
- very efficient manner. Unfortunately, this makes the LCD
- unsuitable for a Collapse OS shell: 6 pixels per glyph gives us
- only 16 characters per line, which is hardly usable.
-
- This is why we have this buffering system. How it works is that
- we're always in 8-bit mode and we hold the whole area (8 pixels
- wide by FNTH high) in memory. When we want to put a glyph to
- screen, we first read the contents of that area, then add our
- new glyph, offsetted and masked, to that buffer, then push the
- buffer back to the LCD. If the glyph is split, move to the next
- area and finish the job.
- (cont.)
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