Motorola HC12 - Manual (Page 198)

User’s Manual MCUez HC12 Assembler
198 Assembler Directives MOTOROLA
Assembler Directives
Example: The following example demonstrates the definition of a section
aaa , which is split into two blocks, with section bbb between
them. The location counter associated with label zz is 1,
because a NOP instruction was already defined in this section
at label xx .
2 2 aaa: section 4
3 3 000000 A7 xx: nop
4 4 bbb: section 5
5 5 000000 A7 yy: nop
6 6 000001 A7 nop
7 7 000002 A7 nop
8 8 aaa: section 4
9 9 000001 A7 zz: nop
The optional qualifier SHORT specifies that the section is a
short section. Objects defined there can be accessed using the
direct addressing mode.
Example: The following example demonstrates the definition and usage
of a
SHORT section. On line number 12, the symbol data is
accessed using the direct addressing mode.
2 2 dataSec: SECTION SHORT
3 3 000000 data: DS.B 1
4 4
5 5 0000 0AFE initSP: EQU $AFE
6 6
7 7 codeSec: SECTION
8 8
9 9 entry:
10 10 000000 CF 0AFE LDS #initSP
11 11 000003 C600 LDAB #0
12 12 000005 5Bxx STAB data