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by erwincoumans 547 days ago
You can copy C64 Basic to its underlying RAM (starting at $A000) and disable the ROM. Then it is mutable. https://www.lemon64.com/forum/viewtopic.php?t=69655
1 comments
fastjack42 547 days ago
That was our favourite trick. Copying BASIC ROM to the RAM below and then changing "ERROR" to "TERROR". My 13 year old self was always amused by:

?SYNTAX TERROR

link