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https://github.com/wavemotion-dave/A5200DS.git
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53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
#ifndef _CPU_H_
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#define _CPU_H_
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#include "config.h"
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#ifdef ASAP /* external project, see http://asap.sf.net */
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#include "asap_internal.h"
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#else
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#include "atari.h"
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#endif
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#define N_FLAG 0x80
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#define V_FLAG 0x40
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#define B_FLAG 0x10
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#define D_FLAG 0x08
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#define I_FLAG 0x04
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#define Z_FLAG 0x02
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#define C_FLAG 0x01
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void CPU_Initialise(void); /* used in the assembler version of cpu.c only */
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void CPU_GetStatus(void);
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void CPU_PutStatus(void);
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void CPU_Reset(void);
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void NMI(void);
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void GO(int limit);
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#define GenerateIRQ() (IRQ = 1)
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extern ULONG regPC;
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extern UBYTE regA;
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extern UBYTE regP;
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extern UBYTE regS;
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extern UBYTE regY;
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extern UBYTE regX;
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#define SetN regP |= N_FLAG
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#define ClrN regP &= (~N_FLAG)
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#define SetV regP |= V_FLAG
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#define ClrV regP &= (~V_FLAG)
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#define SetB regP |= B_FLAG
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#define ClrB regP &= (~B_FLAG)
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#define SetD regP |= D_FLAG
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#define ClrD regP &= (~D_FLAG)
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#define SetI regP |= I_FLAG
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#define ClrI regP &= (~I_FLAG)
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#define SetZ regP |= Z_FLAG
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#define ClrZ regP &= (~Z_FLAG)
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#define SetC regP |= C_FLAG
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#define ClrC regP &= (~C_FLAG)
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extern UBYTE IRQ;
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extern UBYTE cim_encountered;
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#endif /* _CPU_H_ */
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