| 1 | // This is part of Pico Library |
| 2 | |
| 3 | // (c) Copyright 2004 Dave, All rights reserved. |
| 4 | // (c) Copyright 2006 notaz, All rights reserved. |
| 5 | // Free for non-commercial use. |
| 6 | |
| 7 | // For commercial use, separate licencing terms must be obtained. |
| 8 | |
| 9 | |
| 10 | #include "../PicoInt.h" |
| 11 | |
| 12 | |
| 13 | int SekCycleCntS68k=0; // cycles done in this frame |
| 14 | int SekCycleAimS68k=0; // cycle aim |
| 15 | |
| 16 | #ifdef EMU_M68K |
| 17 | // ---------------------- MUSASHI 68000 ---------------------- |
| 18 | m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU |
| 19 | #endif |
| 20 | |
| 21 | |
| 22 | #ifdef EMU_M68K |
| 23 | int SekIntAckS68k(int level) |
| 24 | { |
| 25 | dprintf("s68k: int %i ack [%i|%i]", level, Pico.m.scanline, SekCyclesDone()); |
| 26 | CPU_INT_LEVEL = 0; |
| 27 | return M68K_INT_ACK_AUTOVECTOR; |
| 28 | } |
| 29 | #endif |
| 30 | |
| 31 | |
| 32 | int SekInitS68k() |
| 33 | { |
| 34 | #ifdef EMU_M68K |
| 35 | { |
| 36 | // Musashi is not very context friendly.. |
| 37 | void *oldcontext = m68ki_cpu_p; |
| 38 | m68k_set_context(&PicoS68kCPU); |
| 39 | m68k_set_cpu_type(M68K_CPU_TYPE_68000); |
| 40 | m68k_init(); |
| 41 | m68k_set_int_ack_callback(SekIntAckS68k); |
| 42 | // m68k_pulse_reset(); // not yet, memmap is not set up |
| 43 | m68k_set_context(oldcontext); |
| 44 | } |
| 45 | #endif |
| 46 | |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | // Reset the 68000: |
| 51 | int SekResetS68k() |
| 52 | { |
| 53 | if (Pico.rom==NULL) return 1; |
| 54 | |
| 55 | #ifdef EMU_M68K |
| 56 | { |
| 57 | void *oldcontext = m68ki_cpu_p; |
| 58 | |
| 59 | m68k_set_context(&PicoS68kCPU); |
| 60 | m68k_pulse_reset(); |
| 61 | m68k_set_context(oldcontext); |
| 62 | } |
| 63 | #endif |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | int SekInterruptS68k(int irq) |
| 69 | { |
| 70 | #ifdef EMU_M68K |
| 71 | void *oldcontext = m68ki_cpu_p; |
| 72 | m68k_set_context(&PicoS68kCPU); |
| 73 | m68k_set_irq(irq); // raise irq (gets lowered after taken or must be done in ack) |
| 74 | m68k_set_context(oldcontext); |
| 75 | #endif |
| 76 | return 0; |
| 77 | } |
| 78 | |