 C166 User's Guide | |
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C166 User's Guide
C166 Introduction Compiling Programs Language Extensions
Keywords Memory Models Tiny Model Small Model Medium Model Compact Model Large Model HCompact Model HLarge Model XLarge Model Memory Types near far bdata ebdata idata sdata huge xhuge Memory Type Comparison Pointers with Memory Types Implicit Memory Types Type Qualifiers const volatile Data Types Special Function Registers sfr Types sbit Types bit Types Bit-Addressable Objects Function Declarations Return Values Register Bank Register Mask Interrupt Functions Fast Interrupts Cached Vectors Fast Register Banks Inline Functions Real-Time Function Tasks Inline Assembly Traditional Inline Assembly Extended Inline Assembly Register Use Use in Macro Definitions Preprocessor Advanced Programming Error Messages Library Reference Appendixhuge
The huge memory type may be used for variables, constants, and functions. This memory is accessed using 32-bit addresses and may be on-chip or external.
- For variables, huge memory is limited to 16M, objects are limited to 64K, and objects may not cross a 64K boundary. Variables declared huge are located in the HDATA group.
- For constants (ROM variables), huge memory is limited to 16M, objects are limited to 64K, and objects may not cross a 64K boundary. Constant variables declared huge are located in the HCONST group.
- For program code (functions), huge memory is limited to 16M. Program code declared huge is stored in the FCODE group. Functions are invoked with the CALLS instruction.
Declare huge objects as follows:
unsigned char huge huge_variable;
unsigned char const huge huge_const_variable;
unsigned int huge huge_func (void)
{
return (0);
}
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