Posted on October 29, 2004 at 08:37Hi Ronnie,
in the Cosmic Compiler the @tiny modifier forces a variable to be explicitely allocated in zero page. In the compiled assembler code this variable will then be addressed in
short addressing mode. See also
C Cross Compiler User's Guide for ST7 (Cosmic), chapter 3 at Placing DataObjects in Short Range Memory (page 3-13ff).
- Example:
@tiny char c_tiny; /* short addressing mode */
@near char b_near; /* long addressing mode */
....
c_tiny = b_near;
....
b_near = c_tiny;
....
-> Resulting assembler code:
....
F107 c60123 LD A,b_near
F10a b7C1 LD c_tiny,A
....
F11e b6C1 LD A,c_tiny
F120 c70123 LD b_near,A
The @tiny modifier helps you in optimizing your resulting code, especially if you are using bit operations.
The Metrowerks Compiler uses #pragma directives instead.
With your #define statement the compiler only substitutes the term
@tiny for
abc in your program.
Hope it helps and good luck
WoRo
