/* Read the initial stack pointer and program counter */
m68ki_jump(0);
+ REG_SP = m68ki_read_imm_32();
+ REG_PC = m68ki_read_imm_32();
+ m68ki_jump(REG_PC);
CPU_RUN_MODE = RUN_MODE_NORMAL;
}
}
#endif
-
+
return m68k_read_memory_16(address);
}
inline unsigned int m68k_read_immediate_32(unsigned int address) {
return read_data[i][address - read_addr[i]];
}
}
-
+
return m68k_read_memory_8(address);
}
inline unsigned int m68k_read_pcrelative_16(unsigned int address) {
}
#endif
+
+uint m68ki_read_imm6_addr_slowpath(uint32_t pc, address_translation_cache *cache)
+{
+ uint32_t address = ADDRESS_68K(pc);
+ uint32_t pc_address_diff = pc - address;
+ for (int i = 0; i < read_ranges; i++) {
+ if(address >= read_addr[i] && address < read_upper[i]) {
+ cache->lower = read_addr[i] + pc_address_diff;
+ cache->upper = read_upper[i] + pc_address_diff;
+ cache->data = read_data[i];
+ REG_PC += 2;
+ return be16toh(((unsigned short *)(read_data[i] + (address - read_addr[i])))[0]);
+ }
+ }
+
+ m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
+ m68ki_cpu.mmu_tmp_fc = FLAG_S | FUNCTION_CODE_USER_PROGRAM;
+ m68ki_cpu.mmu_tmp_rw = 1;
+ m68ki_cpu.mmu_tmp_sz = M68K_SZ_WORD;
+ m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */
+
+#if M68K_EMULATE_PREFETCH
+{
+ uint result;
+ if(REG_PC != CPU_PREF_ADDR)
+ {
+ CPU_PREF_DATA = m68ki_ic_readimm16(REG_PC);
+ CPU_PREF_ADDR = m68ki_cpu.mmu_tmp_buserror_occurred ? ((uint32)~0) : REG_PC;
+ }
+ result = MASK_OUT_ABOVE_16(CPU_PREF_DATA);
+ REG_PC += 2;
+ if (!m68ki_cpu.mmu_tmp_buserror_occurred) {
+ // prefetch only if no bus error occurred in opcode fetch
+ CPU_PREF_DATA = m68ki_ic_readimm16(REG_PC);
+ CPU_PREF_ADDR = m68ki_cpu.mmu_tmp_buserror_occurred ? ((uint32)~0) : REG_PC;
+ // ignore bus error on prefetch
+ m68ki_cpu.mmu_tmp_buserror_occurred = 0;
+ }
+ return result;
+}
+#else
+ REG_PC += 2;
+
+ return m68k_read_immediate_16(address);
+#endif /* M68K_EMULATE_PREFETCH */
+}
+
+
+
void m68k_add_ram_range(uint32_t addr, uint32_t upper, unsigned char *ptr)
{
+ code_translation_cache.lower = 0;
+ code_translation_cache.upper = 0;
if ((addr == 0 && upper == 0) || upper < addr)
return;
void m68k_add_rom_range(uint32_t addr, uint32_t upper, unsigned char *ptr)
{
+ code_translation_cache.lower = 0;
+ code_translation_cache.upper = 0;
if ((addr == 0 && upper == 0) || upper < addr)
return;