CALL numeric-address

Invokes a native machine routine at the given memory address.
This allows BASIC programs to interface directly with the Retro Rocket kernel or user-supplied machine code.

Remarks: This feature is currently not implemented.; In future, it will allow advanced users to extend BASIC with their own routines.

Planned Behaviour

numeric-address must be a valid 64-bit address aligned to an instruction boundary.
The called routine will execute with the same privileges as the BASIC interpreter.
No automatic argument passing or stack frame is provided - users are responsible for adhering to the calling convention.
Returning from the routine will resume BASIC execution at the next statement.
Invalid addresses will raise a runtime error (caught by ON ERROR if present).

Notes

This statement is intended for advanced/low-level use only.
Incorrect usage may crash Retro Rocket or corrupt memory.
Future documentation will detail calling conventions and safe entry points.

See also: CHAIN, LIBRARY