Lunar lander and UDG generally

[Jbizzel]

Damn it. It doesn't work.

[tofro]

How does "doesn't work" look like?

What does (after the program has run)

Code: Select all

FOR i = 127 TO 127 + 15 : PRINT #1,CHR$(i) 

do?

[dilwyn]

Hi,

Have look at QL Today Vol13 issue 2,3,4 Dilwyn did an excellent article on the use of Fonts.

Article available here.
https://www.dilwyn.qlforum.co.uk/docs/a ... nfonts.zip

[Jbizzel]

How does "doesn't work" look like?

What does (after the program has run)

Code: Select all

FOR i = 127 TO 127 + 15 : PRINT #1,CHR$(i) 

do?

It prints the UDGs!!!!

Edit*

Ah, I need channel 3. I have UDG. Working!

Thanks, I'll have a read of the articles you listed.

It's always good to work through a practical example.

Thank you

[dilwyn]

I don't want to overcomplicate things, but I wrote an article on how the font data structures work (in broad terms) which might help to explain why PEEKing and POKEing font addresses is a bad idea. It's a bit technical but tries to explain things as it goes along. If it helps explains things, I might add it to the Fun With Fonts article on my website.