Extending BASIC

[nsg Profile]

Ther is this Convertion plugin on my Prizm that when you start it says "It provides conversion functions". And indeed BASIC has some conversion functions.
How do I write a plugin like that? I would like to try to write a plugin that provides functionality nat available in basic, sprites, for example.

[helder7]

If I am sure, the conversion add-in for prizm does not add function(s) for programs.

The OS shearch for the add-in Conv.g3a (try renaming it, and it will not work) and possibly check some parameters.

Thereafter the conversion functions (natively on the system) are activated.

There is already a similar project (extending basic) for fx9860 and prizm by purobaz (but I think it is a little stopped), check this thread. Maybe you can expand it.

[nsg Profile]

Thank you fir the explanation. It is a pity that there is no standard way to extend.
So, Conv.g3a is just a dummy add-in that does not do anything, but by mere presence enables/allows functions, right?

[helder7]

So, Conv.g3a is just a dummy add-in that does not do anything, but by mere presence enables/allows functions, right?

Yes

[flyingfisch Profile]

PRGM2 expands BASIC code though.

[nsg Profile]

What is this PRGM2 i keep reading about? Does it exist for Prizm? I only found .G1M file, it would not run on Prizm.