mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-05 02:15:07 +01:00
48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/*******************************************************************************
|
|
* *
|
|
* Define size independent data types and operations. *
|
|
* *
|
|
* The following types must be supported by all platforms: *
|
|
* *
|
|
* UINT8 - Unsigned 8-bit Integer INT8 - Signed 8-bit integer *
|
|
* UINT16 - Unsigned 16-bit Integer INT16 - Signed 16-bit integer *
|
|
* UINT32 - Unsigned 32-bit Integer INT32 - Signed 32-bit integer *
|
|
* *
|
|
*******************************************************************************/
|
|
|
|
#ifndef OSD_CPU_H
|
|
#define OSD_CPU_H
|
|
|
|
#undef TRUE
|
|
#undef FALSE
|
|
#define TRUE 1
|
|
#define FALSE 0
|
|
|
|
typedef unsigned char UINT8;
|
|
typedef unsigned short UINT16;
|
|
typedef unsigned int UINT32;
|
|
typedef signed char INT8;
|
|
typedef signed short INT16;
|
|
typedef signed int INT32;
|
|
|
|
/******************************************************************************
|
|
* Union of UINT8, UINT16 and UINT32 in native endianess of the target
|
|
* This is used to access bytes and words in a machine independent manner.
|
|
* The upper bytes h2 and h3 normally contain zero (16 bit CPU cores)
|
|
* thus PAIR.d can be used to pass arguments to the memory system
|
|
* which expects 'int' really.
|
|
******************************************************************************/
|
|
|
|
typedef union {
|
|
#ifdef LSB_FIRST
|
|
struct { UINT8 l,h,h2,h3; } b;
|
|
struct { UINT16 l,h; } w;
|
|
#else
|
|
struct { UINT8 h3,h2,h,l; } b;
|
|
struct { UINT16 h,l; } w;
|
|
#endif
|
|
UINT32 d;
|
|
} PAIR;
|
|
|
|
#endif /* defined OSD_CPU_H */
|