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61 lines
2.7 KiB
C
61 lines
2.7 KiB
C
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// Cyclone 68000 Emulator - Header File
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// Most code (c) Copyright 2004 Dave, All rights reserved.
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// Some coding/bugfixing was done by notaz
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// Cyclone 68000 is free for non-commercial use.
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// For commercial use, separate licencing terms must be obtained.
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int CycloneVer; // Version number of library
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struct Cyclone
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{
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unsigned int d[8]; // [r7,#0x00]
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unsigned int a[8]; // [r7,#0x20]
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unsigned int pc; // [r7,#0x40] Memory Base+PC
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unsigned char srh; // [r7,#0x44] Status Register high (T_S__III)
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unsigned char xc; // [r7,#0x45] Extend flag (____??X?)
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unsigned char flags; // [r7,#0x46] Flags (ARM order: ____NZCV) [68k order is XNZVC]
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unsigned char irq; // [r7,#0x47] IRQ level
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unsigned int osp; // [r7,#0x48] Other Stack Pointer (USP/SSP)
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unsigned int vector; // [r7,#0x4c] IRQ vector (temporary)
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unsigned int pad1[2];
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int stopped; // [r7,#0x58] 1 == processor is in stopped state
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int cycles; // [r7,#0x5c]
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int membase; // [r7,#0x60] Memory Base (ARM address minus 68000 address)
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unsigned int (*checkpc)(unsigned int pc); // [r7,#0x64] - Called to recalc Memory Base+pc
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unsigned char (*read8 )(unsigned int a); // [r7,#0x68]
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unsigned short (*read16 )(unsigned int a); // [r7,#0x6c]
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unsigned int (*read32 )(unsigned int a); // [r7,#0x70]
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void (*write8 )(unsigned int a,unsigned char d); // [r7,#0x74]
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void (*write16)(unsigned int a,unsigned short d); // [r7,#0x78]
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void (*write32)(unsigned int a,unsigned int d); // [r7,#0x7c]
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unsigned char (*fetch8 )(unsigned int a); // [r7,#0x80]
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unsigned short (*fetch16)(unsigned int a); // [r7,#0x84]
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unsigned int (*fetch32)(unsigned int a); // [r7,#0x88]
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void (*IrqCallback)(int int_level); // [r7,#0x8c] - optional irq callback function, see config.h
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void (*ResetCallback)(); // [r7,#0x90] - if enabled in config.h, calls this whenever RESET opcode is encountered.
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int (*UnrecognizedCallback)(); // [r7,#0x94] - if enabled in config.h, calls this whenever unrecognized opcode is encountered.
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};
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// used only if Cyclone was compiled with compressed jumptable, see config.h
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void CycloneInit();
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// run cyclone. Cycles should be specified in context (pcy->cycles)
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void CycloneRun(struct Cyclone *pcy);
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// utility functions to get and set SR
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void CycloneSetSr(struct Cyclone *pcy, unsigned int sr); // auto-swaps a7<->osp if detects supervisor change
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unsigned int CycloneGetSr(struct Cyclone *pcy);
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// genesis: if 1, switch to normal TAS handlers
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void CycloneSetRealTAS(int use_real);
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#ifdef __cplusplus
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} // End of extern "C"
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#endif
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