Motorola HC12 - 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