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https://github.com/ekeeke/Genesis-Plus-GX.git
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35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
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#ifndef _MACROS_H_
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#define _MACROS_H_
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#ifdef LSB_FIRST
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#define READ_BYTE(BASE, ADDR) (BASE)[(ADDR)^1]
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#define READ_WORD(BASE, ADDR) (((BASE)[ADDR]<<8) | \
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(BASE)[(ADDR)+1])
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#define READ_WORD_LONG(BASE, ADDR) (((BASE)[ADDR]<<24) | \
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((BASE)[(ADDR)+1]<<16) | \
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((BASE)[(ADDR)+2]<<8) | \
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(BASE)[(ADDR)+3])
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#define WRITE_BYTE(BASE, ADDR, VAL) (BASE)[(ADDR)^1] = (VAL)&0xff
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#define WRITE_WORD(BASE, ADDR, VAL) (BASE)[ADDR] = ((VAL)>>8) & 0xff; \
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(BASE)[(ADDR)+1] = (VAL)&0xff
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#define WRITE_WORD_LONG(BASE, ADDR, VAL) (BASE)[(ADDR] = ((VAL)>>24) & 0xff; \
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(BASE)[(ADDR)+1] = ((VAL)>>16)&0xff; \
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(BASE)[(ADDR)+2] = ((VAL)>>8)&0xff; \
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(BASE)[(ADDR)+3] = (VAL)&0xff
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#else
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#define READ_BYTE(BASE, ADDR) (BASE)[ADDR]
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#define READ_WORD(BASE, ADDR) *(uint16 *)((BASE) + (ADDR));
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#define READ_WORD_LONG(BASE, ADDR) *(uint32 *)((BASE) + (ADDR));
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#define WRITE_BYTE(BASE, ADDR, VAL) (BASE)[ADDR] = VAL & 0xff
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#define WRITE_WORD(BASE, ADDR, VAL) *(uint16 *)((BASE) + (ADDR)) = VAL & 0xffff
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#define WRITE_WORD_LONG(BASE, ADDR, VAL) *(uint32 *)((BASE) + (ADDR)) = VAL & 0xffffffff
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#endif
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#endif /* _MACROS_H_ */
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