Motorola HC12 - page 230

User’s Manual MCUez HC12 Assembler
230 Operating Procedures MOTOROLA
Operating Procedures
NOTE: Each constant in the section VectorTable is defined as a word (2-byte
constant, because the entry in the HC12 vector table is 16 bits wide. In the
previous example, the constant
IRQInt is initialized with the address of the
label
IRQFunc , the constant COPResetInt is initialized with the address of
the label
DummyFunc , etc. Labels specified as initialization values must be
defined, published (using
XDEF ) or imported (using XREF ) before the vector
table section. The statement
ORG $FFF2 specifies that the following section
must start at address
$FFF2 .
The section should now be placed at the expected address. This is performed in
the linker parameter file.
Example:
LINK test.abs
NAMES
test.o
END
SEGMENTS
MY_ROM = READ_ONLY 0x0800 TO 0x08FF;
MY_RAM = READ_WRITE 0x0A00 TO 0x0BFF;
END
PLACEMENT
DEFAULT_RAM INTO MY_RAM;
DEFAULT_ROM INTO MY_ROM;
END
INIT ResetFunc
ENTRIES
*
END
NOTE: The statement ENTRY * END switches smart linking OFF . If this statement is
missing in the PRM file, the vector table will not be linked with the application
because it is never referenced. The smart linker only links referenced objects in
the absolute file.