Zilog Z8F0130 - Manual (Page 219)

UM013037-1212 Additional Keywords for Storage Specification
Zilog Developer Studio II – Z8 Encore!
User Manual
195
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Monitor Function Support – see page 203
The C-Compiler provides a special function type to be used in monitor applications to
support efforts to create a real-time operating system kernel for Z8 Encore!.
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String Placement – see page 204
Because the Z8 Encore! CPU has multiple address spaces, the C-Compiler provides
language extensions to specify the storage for string constants.
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Inline Assembly – see page 205
The C-Compiler provides directives for embedding assembly instructions and direc-
tives into the C program.
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Placement Directives – see page 206
The placement directives allow users to place objects at specific hardware addresses
and align objects at a given alignment.
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Char and Short Enumerations – see page 207
The enumeration data type is defined as int as per ANSI C. The C-Compiler provides
language extensions to specify the enumeration data type to be other than int .
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Setting Flash Option Bytes in C – see page 208
The Z8 Encore! CPU has two Flash option bytes. The C-Compiler provides language
extensions to define these Flash option bytes.
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Program RAM Support (Z8 Encore! XP 16K Series Only) – see page 208
The Z8 Encore! XP 16K Series devices have additional RAM that can be used as Pro-
gram RAM (PRAM) optionally. The Z8 Encore! C-Compiler provides syntax to place
code for a function in PRAM.
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Preprocessor #warning Directive Support – see page 210
The C-Compiler supports #warning directives in addition to #error directives for
diagnostic message generation.
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Supported New Features from the 1999 Standard – see page 210
The Z8 Encore! C-Compiler is based on the 1989 ANSI C standard. Some new fea-
tures from the 1999 standard are supported in this compiler for ease of use.
Additional Keywords for Storage Specification
The near , far , and rom keywords are storage class specifiers and are used to control the
allocation of data objects by the compiler. They can be used on individual data objects
similar to the
const and volatile keywords in the ANSI C standard. The storage speci-
fiers can only be used to control the allocation of global and static data. The allocation of
local data (nonstatic local) and function parameters is decided by the compiler and is