I finished the programming Mode; now the Interpreter also supports writing a new Program.

In order to get some more free space, I got around compressing the GFX Data, improving memory usage by about 27% (from 512 Bytes down to 372 for packed data and table)

I dont think I will be able to squeeze in an Input method for the ',' instruction, there is no more space available.

This is also as far as I will take it with the SNESf1k Interpreter, the memory limitation does not allow for any more than this.