#endif\r
}\r
\r
-\r
-// -----------------------------------------------------------------\r
-// z80 stuff\r
-\r
-#ifdef _USE_MZ80\r
-\r
-// memhandlers for mz80 core\r
-unsigned char mz80_read(UINT32 a, struct MemoryReadByte *w) { return z80_read(a); }\r
-void mz80_write(UINT32 a, UINT8 d, struct MemoryWriteByte *w) { z80_write(d, a); }\r
-\r
-// structures for mz80 core\r
-static struct MemoryReadByte mz80_mem_read[]=\r
-{\r
- {0x0000,0xffff,mz80_read},\r
- {(UINT32) -1,(UINT32) -1,NULL}\r
-};\r
-static struct MemoryWriteByte mz80_mem_write[]=\r
-{\r
- {0x0000,0xffff,mz80_write},\r
- {(UINT32) -1,(UINT32) -1,NULL}\r
-};\r
-static struct z80PortRead mz80_io_read[] ={\r
- {(UINT16) -1,(UINT16) -1,NULL}\r
-};\r
-static struct z80PortWrite mz80_io_write[]={\r
- {(UINT16) -1,(UINT16) -1,NULL}\r
-};\r
-\r
-int mz80_run(int cycles)\r
-{\r
- int ticks_pre = mz80GetElapsedTicks(0);\r
- mz80exec(cycles);\r
- return mz80GetElapsedTicks(0) - ticks_pre;\r
-}\r
-\r
-#endif\r
-\r
-#ifdef _USE_DRZ80\r
-\r
-struct DrZ80 drZ80;\r
-\r
-static unsigned int DrZ80_rebasePC(unsigned short a)\r
-{\r
- drZ80.Z80PC_BASE = (unsigned int) Pico.zram;\r
- return drZ80.Z80PC_BASE + a;\r
-}\r
-\r
-static unsigned int DrZ80_rebaseSP(unsigned short a)\r
-{\r
- drZ80.Z80SP_BASE = (unsigned int) Pico.zram;\r
- return drZ80.Z80SP_BASE + a;\r
-}\r
-#endif\r
-\r
-#if defined(_USE_DRZ80) || defined(_USE_CZ80)\r
-static unsigned char z80_in(unsigned short p)\r
-{\r
- elprintf(EL_ANOMALY, "Z80 port %04x read", p);\r
- return 0xff;\r
-}\r
-\r
-static void z80_out(unsigned short p,unsigned char d)\r
-{\r
- elprintf(EL_ANOMALY, "Z80 port %04x write %02x", p, d);\r
-}\r
-#endif\r
-\r
-\r
-// z80 functionality wrappers\r
-PICO_INTERNAL void z80_init(void)\r
-{\r
-#ifdef _USE_MZ80\r
- struct mz80context z80;\r
-\r
- // z80\r
- mz80init();\r
- // Modify the default context\r
- mz80GetContext(&z80);\r
-\r
- // point mz80 stuff\r
- z80.z80Base=Pico.zram;\r
- z80.z80MemRead=mz80_mem_read;\r
- z80.z80MemWrite=mz80_mem_write;\r
- z80.z80IoRead=mz80_io_read;\r
- z80.z80IoWrite=mz80_io_write;\r
-\r
- mz80SetContext(&z80);\r
-#endif\r
-#ifdef _USE_DRZ80\r
- memset(&drZ80, 0, sizeof(struct DrZ80));\r
- drZ80.z80_rebasePC=DrZ80_rebasePC;\r
- drZ80.z80_rebaseSP=DrZ80_rebaseSP;\r
- drZ80.z80_read8 =z80_read;\r
- drZ80.z80_read16 =NULL;\r
- drZ80.z80_write8 =z80_write;\r
- drZ80.z80_write16 =NULL;\r
- drZ80.z80_in =z80_in;\r
- drZ80.z80_out =z80_out;\r
- drZ80.z80_irq_callback=NULL;\r
-#endif\r
-#ifdef _USE_CZ80\r
- memset(&CZ80, 0, sizeof(CZ80));\r
- Cz80_Init(&CZ80);\r
- Cz80_Set_Fetch(&CZ80, 0x0000, 0x1fff, (UINT32)Pico.zram); // main RAM\r
- Cz80_Set_Fetch(&CZ80, 0x2000, 0x3fff, (UINT32)Pico.zram); // mirror\r
- Cz80_Set_ReadB(&CZ80, (UINT8 (*)(UINT32 address))z80_read); // unused (hacked in)\r
- Cz80_Set_WriteB(&CZ80, z80_write);\r
- Cz80_Set_INPort(&CZ80, z80_in);\r
- Cz80_Set_OUTPort(&CZ80, z80_out);\r
-#endif\r
-}\r
-\r
-PICO_INTERNAL void z80_reset(void)\r
-{\r
-#ifdef _USE_MZ80\r
- mz80reset();\r
-#endif\r
-#ifdef _USE_DRZ80\r
- memset(&drZ80, 0, 0x54);\r
- drZ80.Z80F = (1<<2); // set ZFlag\r
- drZ80.Z80F2 = (1<<2); // set ZFlag\r
- drZ80.Z80IX = 0xFFFF << 16;\r
- drZ80.Z80IY = 0xFFFF << 16;\r
- drZ80.Z80IM = 0; // 1?\r
- drZ80.z80irqvector = 0xff0000; // RST 38h\r
- drZ80.Z80PC = drZ80.z80_rebasePC(0);\r
- drZ80.Z80SP = drZ80.z80_rebaseSP(0x2000); // 0xf000 ?\r
-#endif\r
-#ifdef _USE_CZ80\r
- Cz80_Reset(&CZ80);\r
- Cz80_Set_Reg(&CZ80, CZ80_IX, 0xffff);\r
- Cz80_Set_Reg(&CZ80, CZ80_IY, 0xffff);\r
- Cz80_Set_Reg(&CZ80, CZ80_SP, 0x2000);\r
-#endif\r
- Pico.m.z80_fakeval = 0; // for faking when Z80 is disabled\r
-}\r
-\r
-#if 0\r
-static int had_irq = 0, z80_ppc, z80_ops_done = 0;\r
-int z80_cycles_left = 0;\r
-\r
-void z80_int(void)\r
-{\r
- had_irq = 1;\r
-}\r
-\r
-static void xfail(void)\r
-{\r
- printf("PC: %04x, %04x\n", Cz80_Get_Reg(&CZ80, CZ80_PC), z80_ppc);\r
- printf("z80_ops_done done: %i\n", z80_ops_done);\r
- exit(1);\r
-}\r
-\r
-int z80_run(int cycles)\r
-{\r
- int fail = 0;\r
- int cdrz, ccz;\r
-\r
- z80_cycles_left = cycles;\r
- z80_ppc = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
-\r
- if (had_irq) {\r
- printf("irq @ %04x\n", Cz80_Get_Reg(&CZ80, CZ80_PC));\r
- Cz80_Set_IRQ(&CZ80, 0, HOLD_LINE);\r
- drZ80.Z80_IRQ = 1;\r
- had_irq = 0;\r
- }\r
-\r
- while (z80_cycles_left > 0)\r
- {\r
- ccz = Cz80_Exec(&CZ80, 1);\r
- cdrz = 1 - DrZ80Run(&drZ80, 1);\r
-\r
- if (drZ80.Z80_IRQ && (drZ80.Z80IF&1))\r
- cdrz += 1 - DrZ80Run(&drZ80, 1); // cz80 processes IRQ after EI, DrZ80 does not\r
-\r
- if (cdrz != ccz) {\r
- printf("cycles: %i vs %i\n", cdrz, ccz);\r
- fail = 1;\r
- }\r
-\r
- if (drZ80.Z80PC - drZ80.Z80PC_BASE != Cz80_Get_Reg(&CZ80, CZ80_PC)) {\r
- printf("PC: %04x vs %04x\n", drZ80.Z80PC - drZ80.Z80PC_BASE, Cz80_Get_Reg(&CZ80, CZ80_PC));\r
- fail = 1;\r
- }\r
-\r
- if (fail) xfail();\r
-\r
- z80_ops_done++;\r
- z80_cycles_left -= ccz;\r
- z80_ppc = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
- }\r
-\r
- return co - z80_cycles_left;\r
-}\r
-#endif\r
-\r
-\r
-PICO_INTERNAL void z80_pack(unsigned char *data)\r
-{\r
-#if defined(_USE_MZ80)\r
- struct mz80context mz80;\r
- *(int *)data = 0x00005A6D; // "mZ"\r
- mz80GetContext(&mz80);\r
- memcpy(data+4, &mz80.z80clockticks, sizeof(mz80)-5*4); // don't save base&memhandlers\r
-#elif defined(_USE_DRZ80)\r
- *(int *)data = 0x015A7244; // "DrZ" v1\r
- drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r
- drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r
- memcpy(data+4, &drZ80, 0x54);\r
-#elif defined(_USE_CZ80)\r
- *(int *)data = 0x00007a43; // "Cz"\r
- *(int *)(data+4) = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
- memcpy(data+8, &CZ80, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r
-#endif\r
-}\r
-\r
-PICO_INTERNAL void z80_unpack(unsigned char *data)\r
-{\r
-#if defined(_USE_MZ80)\r
- if (*(int *)data == 0x00005A6D) { // "mZ" save?\r
- struct mz80context mz80;\r
- mz80GetContext(&mz80);\r
- memcpy(&mz80.z80clockticks, data+4, sizeof(mz80)-5*4);\r
- mz80SetContext(&mz80);\r
- } else {\r
- z80_reset();\r
- z80_int();\r
- }\r
-#elif defined(_USE_DRZ80)\r
- if (*(int *)data == 0x015A7244) { // "DrZ" v1 save?\r
- memcpy(&drZ80, data+4, 0x54);\r
- // update bases\r
- drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r
- drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r
- } else {\r
- z80_reset();\r
- drZ80.Z80IM = 1;\r
- z80_int(); // try to goto int handler, maybe we won't execute trash there?\r
- }\r
-#elif defined(_USE_CZ80)\r
- if (*(int *)data == 0x00007a43) { // "Cz" save?\r
- memcpy(&CZ80, data+8, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r
- Cz80_Set_Reg(&CZ80, CZ80_PC, *(int *)(data+4));\r
- } else {\r
- z80_reset();\r
- z80_int();\r
- }\r
-#endif\r
-}\r
-\r
-PICO_INTERNAL void z80_exit(void)\r
-{\r
-#if defined(_USE_MZ80)\r
- mz80shutdown();\r
-#endif\r
-}\r
-\r
-#if 1 // defined(__DEBUG_PRINT) || defined(__GP2X__) || defined(__GIZ__)\r
-PICO_INTERNAL void z80_debug(char *dstr)\r
-{\r
-#if defined(_USE_DRZ80)\r
- sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", drZ80.Z80PC-drZ80.Z80PC_BASE, drZ80.Z80SP-drZ80.Z80SP_BASE);\r
-#elif defined(_USE_CZ80)\r
- sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", CZ80.PC - CZ80.BasePC, CZ80.SP.W);\r
-#endif\r
-}\r
-#endif\r
notaz.gp2x.de / picodrive.git / blobdiff