Adding BASIC command to the X16 kernal

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JimmyDansbo
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General - CX16 Adding BASIC command to the X16 kernal

Post by JimmyDansbo »

I have tried to do a writeup of what is needed to add a new statement or function to BASIC on the Commander X16

Have a look at
https://techblog.dansbo.dk/?p=91
Visit my Github repo
or my personal site with CX16/C64/6502 related information.
Feel free to contact me regarding any of my projects or even about meeting up somewhere near Denmark
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mgkaiser
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Re: Adding BASIC command to the X16 kernal

Post by mgkaiser »

This is great if you wish to fork and recompile the ROM. Is there a vector available to add "soft" changes? I know there were numerous "wedges" that did this on the C64, but it would be nice if we could design in from the beginning an interface to just hook a vector to extend BASIC.
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JimmyDansbo
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Re: Adding BASIC command to the X16 kernal

Post by JimmyDansbo »

I believe that the USR function is supported on the CX16 just like it is on the C64
https://www.c64-wiki.com/wiki/USR
Visit my Github repo
or my personal site with CX16/C64/6502 related information.
Feel free to contact me regarding any of my projects or even about meeting up somewhere near Denmark
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ahenry3068
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Re: Adding BASIC command to the X16 kernal

Post by ahenry3068 »

You can also either Bload or Poke Machine code and call it with SYS ..... This is the easiest way to extend BASIC on a one off basis.
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Martin Schmalenbach
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Re: Adding BASIC command to the X16 kernal

Post by Martin Schmalenbach »

mgkaiser wrote: ↑Fri Mar 01, 2024 3:52 pm This is great if you wish to fork and recompile the ROM. Is there a vector available to add "soft" changes? I know there were numerous "wedges" that did this on the C64, but it would be nice if we could design in from the beginning an interface to just hook a vector to extend BASIC.
I would SO love to see this.

Forking the ROM might introduce IP/licensing issues as it would include a substantial copy of the BASIC interpreter, would it not?
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