Tutorial by Luca Bordoni, thanks to David Saphier and Allan Turvey
 
It’s suggested to read and understand the tutorials about the AGD character set and the ASM calls before continuing here.
 
Assembly routines inject “special effects” in our AGD projects. Even without being an assembly expert, there could be the need to include external machine code routines such as sound effects, compressed graphics or any other kind of enhanchement, and ...

Tutorial by Luca Bordoni
 
This page is oriented to AGD newbies, some arguments could sound obvious to experienced programmers.
 
The first AGD option is about the character set, that is a tool to modify every single character easily. However, many users would like to load an external file, by pressing “L” from the AGD character set menu.
 

 
Memory specifications
 
The ZX Spectrum character-set has 96 characters, 8 bytes each, that is a ...