I was also going to reference that asciipetscii thread. Font is not supposed to go outside of the 64x64 screen.
You could try this out...
- Download this font: https://www.dafont.com/perfect-dos-vga-437.font
- Type what you need and hit the "Print Screen" Key
- Paste it into MS-PAINT.
- Select the portion with the text and hit "Ctrl" + "Numpad Minus"
- Clean it up.
I just used this process to make the icon for my submission.