Function cpu_do_fallback

src/newcpu.cpp:3772–3819

}

static void cpu_do_fallback()
{
	bool fallbackmode = false;
	if ((fallback_new_cpu_model < 68020 && !(currprefs.chipset_mask & CSMASK_AGA)) || (fallback_new_cpu_model == 68020 && (currprefs.chipset_mask & CSMASK_AGA))) {
		// -> 68000/68010 or 68EC020
		fallback_cpu_model = currprefs.cpu_model;
		fallback_fpu_model = currprefs.fpu_model;
		fallback_mmu_model = currprefs.mmu_model;
		fallback_cpu_compatible = currprefs.cpu_compatible;
		fallback_cpu_address_space_24 = currprefs.address_space_24;
		changed_prefs.cpu_model = currprefs.cpu_model_fallback && fallback_new_cpu_model <= 68020 ? currprefs.cpu_model_fallback : fallback_new_cpu_model;
		changed_prefs.fpu_model = 0;
		changed_prefs.mmu_model = 0;
		changed_prefs.cpu_compatible = true;
		changed_prefs.address_space_24 = true;
		memcpy(&fallback_regs, &regs, sizeof(struct regstruct));
		fallback_regs.pc = M68K_GETPC;
		fallbackmode = true;
	} else {
		// -> 68020+
		changed_prefs.cpu_model = fallback_cpu_model;
		changed_prefs.fpu_model = fallback_fpu_model;
		changed_prefs.mmu_model = fallback_mmu_model;
		changed_prefs.cpu_compatible = fallback_cpu_compatible;
		changed_prefs.address_space_24 = fallback_cpu_address_space_24;
		fallback_cpu_model = 0;
	}
	init_m68k();
	build_cpufunctbl();
	m68k_reset2(false);
	if (!fallbackmode) {
		// restore original 68020+
		memcpy(&regs, &fallback_regs, sizeof(regs));
		restore_banks();
		memory_restore();
#ifdef DEBUGGER
		memory_map_dump();
#endif
		m68k_setpc(fallback_regs.pc);
	} else {
		// 68000/010/EC020
		memory_restore();
		expansion_cpu_fallback();
#ifdef DEBUGGER
		memory_map_dump();
#endif
	}
}

static void m68k_reset_restore()
{