license info added to Pico directory

[cyclone68000.git] / Pico / Sek.cpp

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// This file is part of the PicoDrive Megadrive Emulator\r
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// This code is licensed under the GNU General Public License version 2.0 and the MAME License.\r
// You can choose the license that has the most advantages for you.\r
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// SVN repository can be found at http://code.google.com/p/cyclone68000/\r
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#include "PicoInt.h"\r
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char PicoStatus[128]=""; // 68000 state for debug\r
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#ifdef EMU_C68K\r
// ---------------------- Cyclone 68000 ----------------------\r
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struct Cyclone PicoCpu;\r
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int SekInit()\r
{\r
  memset(&PicoCpu,0,sizeof(PicoCpu));\r
  return 0;\r
}\r
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// Reset the 68000:\r
int SekReset()\r
{\r
  if (Pico.rom==NULL) return 1;\r
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  PicoCpu.srh =0x27; // Supervisor mode\r
  PicoCpu.a[7]=PicoCpu.read32(0); // Stack Pointer\r
  PicoCpu.membase=0;\r
  PicoCpu.pc=PicoCpu.checkpc(PicoCpu.read32(4)); // Program Counter\r
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  return 0;\r
}\r
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// Run the 68000 for 'cyc' number of cycles and return the number of cycles actually executed\r
static inline int DoRun(int cyc)\r
{\r
  PicoCpu.cycles=cyc;\r
  CycloneRun(&PicoCpu);\r
  return cyc-PicoCpu.cycles;\r
}\r
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int SekInterrupt(int irq)\r
{\r
  PicoCpu.irq=(unsigned char)irq;\r
  return 0;\r
}\r
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int SekPc() { return PicoCpu.pc-PicoCpu.membase; }\r
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void SekState(unsigned char *data)\r
{\r
  memcpy(data,PicoCpu.d,0x44);\r
}\r
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#endif\r
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#ifdef EMU_A68K\r
// ---------------------- A68K ----------------------\r
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extern "C" void __cdecl M68000_RUN();\r
extern "C" void __cdecl M68000_RESET();\r
extern "C" int m68k_ICount=0;\r
extern "C" unsigned int mem_amask=0xffffff; // 24-bit bus\r
extern "C" unsigned int mame_debug=0,cur_mrhard=0,m68k_illegal_opcode=0,illegal_op=0,illegal_pc=0,opcode_entry=0; // filler\r
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static int IrqCallback(int) { return -1; }\r
static int DoReset() { return 0; }\r
static int (*ResetCallback)()=DoReset;\r
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int SekInit()\r
{\r
  memset(&M68000_regs,0,sizeof(M68000_regs));\r
  M68000_regs.IrqCallback=IrqCallback;\r
  M68000_regs.pResetCallback=ResetCallback;\r
  M68000_RESET(); // Init cpu emulator\r
  return 0;\r
}\r
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int SekReset()\r
{\r
  // Reset CPU: fetch SP and PC\r
  M68000_regs.srh=0x27; // Supervisor mode\r
  M68000_regs.a[7]=PicoRead32(0);\r
  M68000_regs.pc  =PicoRead32(4);\r
  PicoInitPc(M68000_regs.pc);\r
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  return 0;\r
}\r
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static inline int DoRun(int cyc)\r
{\r
  m68k_ICount=cyc;\r
  M68000_RUN();\r
  return cyc-m68k_ICount;\r
}\r
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int SekInterrupt(int irq)\r
{\r
  M68000_regs.irq=irq; // raise irq (gets lowered after taken)\r
  return 0;\r
}\r
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int SekPc() { return M68000_regs.pc; }\r
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void SekState(unsigned char *data)\r
{\r
  memcpy(data,      M68000_regs.d, 0x40);\r
  memcpy(data+0x40,&M68000_regs.pc,0x04);\r
}\r
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#endif\r
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#ifdef EMU_NULL\r
// -----------------------------------------------------------\r
int SekInit() { return 0; }\r
int SekReset() { return 0; }\r
static inline int DoRun(int cyc) { return cyc; }\r
int SekInterrupt(int) { return 0; }\r
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int SekPc()\r
{\r
  return 0;\r
}\r
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void SekState(unsigned char *) { }\r
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#endif\r
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int SekRun(int cyc)\r
{\r
  int did=0;\r
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  did=DoRun(cyc);\r
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  return did;\r
}\r