Latest version seems stable and good for 24-high fonts.
Only problem now is to find a 24-high font set that works for 0000-001F codes.
Up-arrow and down-arrow (0x18/0x19) are needed.
The strange thing is these are encoded weirdly even in the 16-high unifont hex file - e.g.
If I substitute the character used for 0011 into this file and use it for 0019, it does not change the character
echo -e \x19
still produces the same down arrow...??