Zilog Z8F0130 - Manual (Page 220)

Using the ANSI C-Compiler UM013037-1212
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Zilog Developer Studio II – Z8 Encore!
User Manual
described in later sections. Any storage specifier used on local and parameter data is
ignored by the compiler.
The data allocation for various storage class specifiers is as follows:
•
near
A variable declared with the near storage specifier is allocated in the 8-bit address-
able RData (near RAM) address space. The address range for these variables is 00-
FF . The corresponding assembler address space for these variables is RData. You can
set this address range within 00-FF based on device type and application requirement.
For example:
near int ni; /* ni is placed in RData address space */
•
far
A variable declared with the far storage specifier is allocated in the 12-bit address-
able EData (far RAM) address space. The address range for these variables is 100-
FFF . The corresponding assembler address space for these variables is EData. You can
set this address range within 100-FFF based on device type and application require-
ment.
For example:
far int fi; /* fi is placed in EData address space */
In the Z8 Encore! compiler, the peripheral registers (address: F00-FFF ) are also mapped to
the far storage specifier; no separate keyword is provided.


For example:


#define T0CTL0 (*(unsigned char volatile far*)0xF06)

T0CTL0 = 0x12;
•
rom
A variable declared with the rom storage specifier is allocated in the 16-bit address-
able nonvolatile memory. The address range for these variables is 0000-FFFF . The
lower portion of this address space is used for the Flash option bytes and interrupt vec-
tor table. The corresponding assembler address space for these variables is ROM. You
can set this address range within
0000-FFFF based on his device type and application
requirement.
For example:
rom int ri; /* ri is placed in ROM address space */
Note: