Now we can make a simple lookup table for the columns of this one character

I have found that it is ever so much easier to make the font tables in assembler. They are then processed by C code.

Here is my way in assembler and my abandoned way in C

just look at

CharH:
 ds 01000001b
 ds 01000001b
 ds 01000001b
 ds 01111111b
 ds 01000001b
 ds 01000001b
 ds 01000001b
in assembler as compared to the C code

#define bit6 0x40
.....
#define bit0 0x01

 U8 CharH[] =
{ (bit6                                    + bit0), 
  (bit6                                    + bit0), 
  (bit6                                    + bit0), 
  (bit6 + bit5 + Bit4 + bit3 + Bit2 + Bit1 + bit0), 
  (bit6                                    + bit0), 
  (bit6                                    + bit0), 
  (bit6                                    + bit0)}

'51 assembler has bit oriented features, C does not (because the computer K&R used did not have bit instructions ?).

Erik