//DingusPPC - Prototype 5bf2
//Written by divingkatae
//(c)2018-20 (theweirdo)
//Please ask for permission
//if you want to distribute this.
//(divingkatae#1017 on Discord)

// The memory operations - ppcmemory.cpp

#include <iostream>
#include <cstdint>
#include <cinttypes>
#include <string>
#include <array>
#include <thread>
#include <atomic>
#include "viacuda.h"
#include "macioserial.h"
#include "macswim3.h"
#include "ppcemumain.h"
#include "ppcmemory.h"
#include "openpic.h"
#include "mpc106.h"
#include "davbus.h"

std::vector<uint32_t> pte_storage;

uint32_t pte_word1;
uint32_t pte_word2;

uint32_t msr_ir_test;
uint32_t msr_dr_test;
uint32_t msr_ip_test;

uint32_t choose_sr;
uint32_t pteg_hash1;
uint32_t pteg_hash2;
uint32_t pteg_answer;

uint32_t pteg_address1;
uint32_t pteg_temp1;
uint32_t pteg_address2;
uint32_t pteg_temp2;

uint32_t pteg_check1;
uint32_t rev_pteg_check1;
uint32_t pteg_check2;
uint32_t rev_pteg_check2;

unsigned char * grab_tempmem_ptr1;
unsigned char * grab_tempmem_ptr2;
unsigned char * grab_tempmem_ptr3;
unsigned char * grab_tempmem_ptr4;

unsigned char * grab_macmem_ptr;
unsigned char * grab_pteg1_ptr;
unsigned char * grab_pteg2_ptr;

std::atomic<bool> hash_found (false);

/** PowerPC-style MMU BAT arrays (NULL initialization isn't prescribed). */
PPC_BAT_entry ibat_array[4] = {{0}};
PPC_BAT_entry dbat_array[4] = {{0}};


/**
Quickly map to memory - sort of.

0x00000000 - 0x7FFFFFFF - Macintosh system memory
(Because this emulator is trying to emulate a Mac with a Grackle motherboard,
 the most memory that can ever be allocated to the system is 2 Gigs.)

0x80000000 - 0xFF7FFFFF - PCI memory
This memory is allocated to things like the memory controller, video, and audio.

0xF3000000 - Mac OS I/O Device area
0xF3013000 - Serial Printer Port (0x20 bytes)
0xF3013020 - Serial Modem Port (0x20 bytes)
0xF3011000 - BMAC Ethernet (0x1000 bytes)
0xF3014000 - DAVAudio Sound Bus (0x1000 bytes)
0xF3015000 - Swim 3 Floppy Disk Drive (0x1000 bytes)
0xF3016000 - Cuda (0x2000 bytes)
0xF3020000 - Heathrow ATA (Hard Drive Interface)

0xFF800000 - 0xFFFFFFFF - ROM memory
This memory is for storing the ROM needed to boot up the computer.

This could definitely be refactored better - TODO
**/

void msr_status_update(){
    msr_ip_test = (ppc_state.ppc_msr >> 6) & 1;
    msr_ir_test = (ppc_state.ppc_msr >> 5) & 1;
    msr_dr_test = (ppc_state.ppc_msr >> 4) & 1;
}

inline void ppc_set_cur_instruction(uint32_t mem_index)
{
    ppc_cur_instruction  = (grab_macmem_ptr[mem_index]   << 24) |
                           (grab_macmem_ptr[mem_index+1] << 16) |
                           (grab_macmem_ptr[mem_index+2] << 8)  |
                            grab_macmem_ptr[mem_index+3];
}

void ppc_set_return_val(uint32_t mem_index, int num_size)
{
    //Put the final result in return_value here
    //This is what gets put back into the register

    if (ppc_state.ppc_msr & 1) { /* little-endian byte ordering */
        if (num_size == 1) { // BYTE
            return_value = grab_macmem_ptr[mem_index];
        }
        else if (num_size == 2) { // WORD
            return_value = grab_macmem_ptr[mem_index] |
                          (grab_macmem_ptr[mem_index+1] << 8);
        }
        else if (num_size == 4) { // DWORD
            return_value = grab_macmem_ptr[mem_index]          |
                          (grab_macmem_ptr[mem_index+1] << 8)  |
                          (grab_macmem_ptr[mem_index+2] << 16) |
                          (grab_macmem_ptr[mem_index+3] << 24);
        }
    } else { /* big-endian byte ordering */
        if (num_size == 1) { // BYTE
            return_value = grab_macmem_ptr[mem_index];
        }
        else if (num_size == 2) { // WORD
            return_value = (grab_macmem_ptr[mem_index] << 8) |
                            grab_macmem_ptr[mem_index+1];
        }
        else if (num_size == 4) { // DWORD
            return_value = (grab_macmem_ptr[mem_index]   << 24) |
                           (grab_macmem_ptr[mem_index+1] << 16) |
                           (grab_macmem_ptr[mem_index+2] << 8)  |
                            grab_macmem_ptr[mem_index+3];
        }
    }
}

void ppc_memstore_value(uint32_t value_insert, uint32_t mem_index, int num_size)
{
    if (ppc_state.ppc_msr & 1) { /* little-endian byte ordering */
        if (num_size >= 1) { // BYTE
            grab_macmem_ptr[mem_index] = value_insert & 0xFF;
        }
        if (num_size >= 2) { // WORD
            grab_macmem_ptr[mem_index+1] = (value_insert >> 8) & 0xFF;
        }
        if (num_size == 4) { // DWORD
            grab_macmem_ptr[mem_index+2] = (value_insert >> 16) & 0xFF;
            grab_macmem_ptr[mem_index+3] = (value_insert >> 24) & 0xFF;
        }
    } else { /* big-endian byte ordering */
        if (num_size == 1) { // BYTE
            grab_macmem_ptr[mem_index] = value_insert & 0xFF;
        }
        else if (num_size == 2) { // WORD
            grab_macmem_ptr[mem_index]   = (value_insert >> 8) & 0xFF;
            grab_macmem_ptr[mem_index+1] = value_insert & 0xFF;
        }
        else if (num_size == 4) { // DWORD
            grab_macmem_ptr[mem_index]   = (value_insert >> 24) & 0xFF;
            grab_macmem_ptr[mem_index+1] = (value_insert >> 16) & 0xFF;
            grab_macmem_ptr[mem_index+2] = (value_insert >> 8)  & 0xFF;
            grab_macmem_ptr[mem_index+3] = value_insert & 0xFF;
        }
    }
}

void ibat_update(uint32_t bat_reg)
{
    int upper_reg_num;
    uint32_t bl, lo_mask;
    PPC_BAT_entry *bat_entry;

    upper_reg_num = bat_reg & 0xFFFFFFFE;

    if (ppc_state.ppc_spr[upper_reg_num] & 3) { // is that BAT pair valid?
        bat_entry = &ibat_array[(bat_reg - 528) >> 1];
        bl = (ppc_state.ppc_spr[upper_reg_num] >> 2) & 0x7FF;
        lo_mask = (bl << 17) | 0x1FFFF;

        bat_entry->access  = ppc_state.ppc_spr[upper_reg_num] & 3;
        bat_entry->prot    = ppc_state.ppc_spr[upper_reg_num + 1] & 3;
        bat_entry->lo_mask = lo_mask;
        bat_entry->phys_hi = ppc_state.ppc_spr[upper_reg_num + 1] & ~lo_mask;
        bat_entry->bepi    = ppc_state.ppc_spr[upper_reg_num] & ~lo_mask;
    }
}

void dbat_update(uint32_t bat_reg)
{
    int upper_reg_num;
    uint32_t bl, lo_mask;
    PPC_BAT_entry *bat_entry;

    upper_reg_num = bat_reg & 0xFFFFFFFE;

    if (ppc_state.ppc_spr[upper_reg_num] & 3) { // is that BAT pair valid?
        bat_entry = &dbat_array[(bat_reg - 536) >> 1];
        bl = (ppc_state.ppc_spr[upper_reg_num] >> 2) & 0x7FF;
        lo_mask = (bl << 17) | 0x1FFFF;

        bat_entry->access  = ppc_state.ppc_spr[upper_reg_num] & 3;
        bat_entry->prot    = ppc_state.ppc_spr[upper_reg_num + 1] & 3;
        bat_entry->lo_mask = lo_mask;
        bat_entry->phys_hi = ppc_state.ppc_spr[upper_reg_num + 1] & ~lo_mask;
        bat_entry->bepi    = ppc_state.ppc_spr[upper_reg_num] & ~lo_mask;
    }
}

void get_pointer_pteg1(uint32_t address_grab){
        //Grab the array pointer for the PTEG
    if (address_grab < 0x80000000){
        pte_word1 = address_grab % ram_size_set;
        if (address_grab < 0x040000000){ //for debug purposes
            grab_pteg1_ptr = machine_sysram_mem;
        }
        else if ((address_grab >= 0x5fffe000) && (address_grab <= 0x5fffffff)){
            pte_word1 = address_grab % 0x2000;
            grab_pteg1_ptr = machine_sysconfig_mem;
        }
        else{
            printf("Uncharted territory: %x \n", address_grab);
        }
    }
    else if (address_grab < 0x80800000){
        pte_word1 = address_grab % 0x800000;
        grab_pteg1_ptr = machine_upperiocontrol_mem;

    }
    else if (address_grab < 0x81000000){
        pte_word1 = address_grab % 0x800000;
        grab_pteg1_ptr = machine_iocontrolcdma_mem;

    }
    else if (address_grab < 0xBF80000){
        pte_word1 = address_grab % 33554432;
        grab_pteg1_ptr = machine_loweriocontrol_mem;

    }
    else if (address_grab < 0xC0000000){
        pte_word1 = address_grab % 16;
        grab_pteg1_ptr = machine_interruptack_mem;

    }
    else if (address_grab < 0xF0000000){
        printf("Invalid Memory Attempt: %x \n", address_grab);
        return;
    }
    else if (address_grab < 0xF8000000){
        pte_word1 = address_grab % 67108864;
        grab_pteg1_ptr = machine_iocontrolmem_mem;

    }
    else if (address_grab < rom_file_begin){
        //Get back to this! (weeny1)
        if (address_grab < 0xFE000000){
            pte_word1 = address_grab % 4096;
            grab_pteg1_ptr = machine_f8xxxx_mem;
        }
        else if (address_grab < 0xFEC00000){
            pte_word1 = address_grab % 65536;
            grab_pteg1_ptr = machine_fexxxx_mem;
        }
        else if (address_grab < 0xFEE00000){
            pte_word1 = 0x0CF8;  //CONFIG_ADDR
            grab_pteg1_ptr = machine_fecxxx_mem;
        }
        else if (address_grab < 0xFF000000){
            pte_word1 = 0x0CFC;  //CONFIG_DATA
            grab_pteg1_ptr = machine_feexxx_mem;
        }
        else if (address_grab < 0xFF800000){
            pte_word1 = address_grab % 4096;
            grab_pteg1_ptr = machine_ff00xx_mem;
        }
        else{
            pte_word1 = (address_grab % 1048576) + 0x400000;
            grab_pteg1_ptr = machine_sysram_mem;
        }
    }
    else{
        pte_word1 = address_grab % rom_file_setsize;
        grab_pteg1_ptr = machine_sysrom_mem;
    }
}

void get_pointer_pteg2(uint32_t address_grab){
        //Grab the array pointer for the PTEG
    if (address_grab < 0x80000000){
        pte_word2 = address_grab % ram_size_set;
        if (address_grab < 0x040000000){ //for debug purposes
            grab_pteg2_ptr = machine_sysram_mem;
        }
        else if ((address_grab >= 0x5fffe000) && (address_grab <= 0x5fffffff)){
            pte_word2 = address_grab % 0x2000;
            grab_pteg2_ptr = machine_sysconfig_mem;
        }
        else{
            printf("Uncharted territory: %x \n", address_grab);
        }
    }
    else if (address_grab < 0x80800000){
        pte_word2 = address_grab % 0x800000;
        grab_pteg2_ptr = machine_upperiocontrol_mem;

    }
    else if (address_grab < 0x81000000){
        pte_word2 = address_grab % 0x800000;
        grab_pteg2_ptr = machine_iocontrolcdma_mem;

    }
    else if (address_grab < 0xBF80000){
        pte_word2 = address_grab % 33554432;
        grab_pteg2_ptr = machine_loweriocontrol_mem;

    }
    else if (address_grab < 0xC0000000){
        pte_word2 = address_grab % 16;
        grab_pteg2_ptr = machine_interruptack_mem;

    }
    else if (address_grab < 0xF0000000){
        printf("Invalid Memory Attempt: %x \n", address_grab);
        return;
    }
    else if (address_grab < 0xF8000000){
        pte_word2 = address_grab % 67108864;
        grab_pteg2_ptr = machine_iocontrolmem_mem;

    }
    else if (address_grab < rom_file_begin){
        //Get back to this! (weeny1)
        if (address_grab < 0xFE000000){
            pte_word2 = address_grab % 4096;
            grab_pteg2_ptr = machine_f8xxxx_mem;
        }
        else if (address_grab < 0xFEC00000){
            pte_word2 = address_grab % 65536;
            grab_pteg2_ptr = machine_fexxxx_mem;
        }
        else if (address_grab < 0xFEE00000){
            pte_word2 = 0x0CF8;  //CONFIG_ADDR
            grab_pteg2_ptr = machine_fecxxx_mem;
        }
        else if (address_grab < 0xFF000000){
            pte_word2 = 0x0CFC;  //CONFIG_DATA
            grab_pteg2_ptr = machine_feexxx_mem;
        }
        else if (address_grab < 0xFF800000){
            pte_word2 = address_grab % 4096;
            grab_pteg2_ptr = machine_ff00xx_mem;
        }
        else{
            pte_word2 = (address_grab % 1048576) + 0x400000;
            grab_pteg2_ptr = machine_sysram_mem;
        }
    }
    else{
        pte_word2 = address_grab % rom_file_setsize;
        grab_pteg2_ptr = machine_sysrom_mem;
    }
}

void primary_generate_pa(){
    pteg_address1 |= ppc_state.ppc_spr[25] & 0xFE000000;
    pteg_temp1 = (((ppc_state.ppc_spr[25] & 0x1FF) << 10) & (pteg_hash1 & 0x7FC00));
    pteg_address1 |= ((ppc_state.ppc_spr[25] & 0x1FF0000) | pteg_temp1);
    pteg_address1 |= (pteg_hash1 & 0x3FF) << 6;
}

void secondary_generate_pa(){
    pteg_address2 |= ppc_state.ppc_spr[25] & 0xFE000000;
    pteg_temp2 = (((ppc_state.ppc_spr[25] & 0x1FF) << 10) & (pteg_hash2 & 0x7FC00));
    pteg_address2 |= ((ppc_state.ppc_spr[25] & 0x1FF0000) | pteg_temp2);
    pteg_address2 |= (pteg_hash2 & 0x3FF) << 6;
}

void primary_hash_check(uint32_t vpid_known){

    uint32_t entries_size = ((ppc_state.ppc_spr[25] & 0x1FF) > 0)? ((ppc_state.ppc_spr[25] & 0x1FF) << 9): 65536;
    uint32_t entries_area = pte_word1 + entries_size;

    uint32_t check_vpid = 0;

    do{
        if (!hash_found){
            check_vpid |= grab_pteg1_ptr[pte_word1++] << 24;
            check_vpid |= grab_pteg1_ptr[pte_word1++] << 16;
            check_vpid |= grab_pteg1_ptr[pte_word1++] << 8;
            check_vpid |= grab_pteg1_ptr[pte_word1++];

        check_vpid = (check_vpid >> 7) & 0xFFFFFF;

        if ((check_vpid >> 31) & 0x01){
            if (vpid_known == check_vpid){
                hash_found = true;
                pteg_answer |= grab_pteg1_ptr[pte_word1++] << 24;
                pteg_answer |= grab_pteg1_ptr[pte_word1++] << 16;
                pteg_answer |= grab_pteg1_ptr[pte_word1++] << 8;
                pteg_answer |= grab_pteg1_ptr[pte_word1++];
                break;
            }
            else{
                pte_word1 += 4;
                check_vpid = 0;
            }
        }
        else{
            pte_word1 += 4;
            check_vpid = 0;
        }
        }
        else{
            pte_word1 = entries_area;
        }

    }while (pte_word1 < entries_area);
}

void secondary_hash_check(uint32_t vpid_known){

    uint32_t entries_size = ((ppc_state.ppc_spr[25] & 0x1FF) > 0)? ((ppc_state.ppc_spr[25] & 0x1FF) << 9): 65536;
    uint32_t entries_area = pte_word1 + entries_size;

    uint32_t check_vpid = 0;

    do{
        if (!hash_found){
            check_vpid |= grab_pteg2_ptr[pte_word2++] << 24;
            check_vpid |= grab_pteg2_ptr[pte_word2++] << 16;
            check_vpid |= grab_pteg2_ptr[pte_word2++] << 8;
            check_vpid |= grab_pteg2_ptr[pte_word2++];

        check_vpid = (check_vpid >> 7) & 0xFFFFFF;

        if ((check_vpid >> 31) & 0x01){
            if (vpid_known == check_vpid){
                hash_found = true;
                pteg_answer |= grab_pteg2_ptr[pte_word2++] << 24;
                pteg_answer |= grab_pteg2_ptr[pte_word2++] << 16;
                pteg_answer |= grab_pteg2_ptr[pte_word2++] << 8;
                pteg_answer |= grab_pteg2_ptr[pte_word2++];
                break;
            }
            else{
                pte_word2 += 4;
                check_vpid = 0;
            }
        }
        else{
            pte_word2 += 4;
            check_vpid = 0;
        }
        }
        else{
            pte_word2 = entries_area;
        }

    }while (pte_word2 < entries_area);
}

void pteg_translate(uint32_t address_grab){
    uint32_t choose_sr = (ppc_effective_address >> 28) & 0x0F;
    pteg_hash1 = ppc_state.ppc_sr[choose_sr] & 0x7FFFF;
    uint32_t page_index = (ppc_effective_address & 0xFFFF000) >> 12;
    pteg_hash1 = (pteg_hash1 ^ page_index);
    pteg_hash2 = ~pteg_hash1;

    std::thread primary_pa_check(&primary_generate_pa);
    std::thread secondary_pa_check(&secondary_generate_pa);

    primary_pa_check.join();
    secondary_pa_check.join();

    uint32_t grab_val = ppc_state.ppc_sr[choose_sr] & 0xFFFFFF;

    std::thread primary_pteg_check(&primary_hash_check, std::ref(grab_val));
    std::thread secondary_pteg_check(&secondary_hash_check, std::ref(grab_val));

    primary_pteg_check.join();
    secondary_pteg_check.join();
}

/** PowerPC-style MMU instruction address translation. */
uint32_t ppc_mmu_instr_translate(uint32_t la)
{
    uint32_t pa; /* translated physical address */

    bool bat_hit = false;
    unsigned msr_pr = !!(ppc_state.ppc_msr & 0x4000);

    // Format: %XY
    // X - supervisor access bit, Y - problem/user access bit
    // Those bits are mutually exclusive
    unsigned access_bits = (~msr_pr << 1) | msr_pr;

    for (int bat_index = 0; bat_index < 4; bat_index++){
        PPC_BAT_entry *bat_entry = &ibat_array[bat_index];

        if ((bat_entry->access & access_bits) &&
            ((la & ~bat_entry->lo_mask) == bat_entry->bepi)) {
            bat_hit = true;
            // TODO: check access

            // logical to physical translation
            pa = bat_entry->phys_hi | (la & bat_entry->lo_mask);
            break;
        }
    }

    // Segment registers & page table translation
    if (!bat_hit){
        pteg_translate(la);
        if (hash_found == true){
            pa = (la & 0xFFF) | (pteg_answer & 0xFFFFF000);
        }
    }

    return pa;
}

/** PowerPC-style MMU data address translation. */
uint32_t ppc_mmu_addr_translate(uint32_t la, uint32_t access_type)
{
    uint32_t pa; /* translated physical address */

    bool bat_hit = false;
    unsigned msr_pr = !!(ppc_state.ppc_msr & 0x4000);

    // Format: %XY
    // X - supervisor access bit, Y - problem/user access bit
    // Those bits are mutually exclusive
    unsigned access_bits = (~msr_pr << 1) | msr_pr;

    for (int bat_index = 0; bat_index < 4; bat_index++){
        PPC_BAT_entry *bat_entry = &dbat_array[bat_index];

        if ((bat_entry->access & access_bits) &&
            ((la & ~bat_entry->lo_mask) == bat_entry->bepi)) {
            bat_hit = true;
            // TODO: check access

            // logical to physical translation
            pa = bat_entry->phys_hi | (la & bat_entry->lo_mask);
            break;
        }
    }

    // Segment registers & page table translation
    if (!bat_hit){
        pteg_translate(la);
        if (hash_found == true){
            pa = (la & 0xFFF) | (pteg_answer & 0xFFFFF000);
        }
    }

    return pa;
}


/** Insert a value into memory from a register. */
void address_quickinsert_translate(uint32_t value_insert, uint32_t address_grab,
            uint8_t num_bytes)
{
    uint32_t storage_area = 0;

    printf("Inserting into address %x with %x \n", address_grab, value_insert);

    // data address translation if enabled
    if (ppc_state.ppc_msr & 0x10) {
        printf("DATA RELOCATION GO! - INSERTING \n");

        address_grab = ppc_mmu_addr_translate(address_grab, 0);
    }

    //regular grabbing
    if (address_grab < 0x80000000){
        if (mpc106_check_membound(address_grab)){
            if (address_grab > 0x03ffffff){ //for debug purposes
                storage_area = address_grab;
                grab_macmem_ptr = machine_sysram_mem;
            }
            else if ((address_grab >= 0x40000000) && (address_grab < 0x40400000)){
                if (is_nubus){
                    storage_area = address_grab % rom_file_setsize;
                    grab_macmem_ptr = machine_sysrom_mem;
                    ppc_memstore_value(value_insert, storage_area, num_bytes);
                    return;
                }
                else{
                    return;
                }
            }
            else if ((address_grab >= 0x5fffe000) && (address_grab <= 0x5fffffff)){
                storage_area = address_grab % 0x2000;
                grab_macmem_ptr = machine_sysconfig_mem;
            }
            else{
                storage_area = address_grab % 0x04000000;
                grab_macmem_ptr = machine_sysram_mem;
                printf("Uncharted territory: %x \n", address_grab);
            }
        }
        else{
            return;
        }
    }
    else if (address_grab < 0x80800000){
        storage_area = address_grab % 0x800000;
        if (address_grab == 0x80000CF8){
            storage_area = 0x0CF8;  //CONFIG_ADDR
            value_insert = rev_endian32(value_insert);
            grab_macmem_ptr = machine_fecxxx_mem;
            uint32_t reg_num = (value_insert & 0x07FC) >> 2;
            uint32_t dev_num = (value_insert & 0xF800) >> 11;
            printf("ADDRESS SET FOR GRACKLE: ");
            printf("Device Number: %d  ", dev_num);
            printf("Hex Register Number: %x \n", reg_num);
            mpc106_address = value_insert;
        }
        else{
            grab_macmem_ptr = machine_upperiocontrol_mem;
        }


        if ((address_grab >= 0x80040000) && (address_grab < 0x80080000)){
            openpic_address = address_grab - 0x80000000;
            openpic_read_word = value_insert;
            openpic_read();
            return;
        }

        printf("Uncharted territory: %x \n", address_grab);
    }
    else if (address_grab < 0x81000000){
        if (address_grab > 0x83FFFFFF){
            return;
        }
        storage_area = address_grab;
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_iocontrolcdma_mem;
    }
    else if (address_grab < 0xBF800000){
        storage_area = address_grab % 33554432;
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_loweriocontrol_mem;
    }
    else if (address_grab < 0xC0000000){
        storage_area = address_grab % 16;
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_interruptack_mem;
    }
    else if (address_grab < 0xF0000000){
        printf("Invalid Memory Attempt: %x \n", address_grab);
        return;
    }
    else if (address_grab < 0xF8000000){
        storage_area = address_grab % 67108864;
            if ((address_grab >= 0xF3013000) && (address_grab < 0xF3013040)){
                mac_serial_address = storage_area;
                serial_write_byte = (uint8_t)value_insert;
                printf("Writing byte to Serial address %x ... %x \n", address_grab, via_write_byte);
                mac_serial_write();
                return;
            }
            else if ((address_grab >= 0xF3014000) && (address_grab < 0xF3015000)){
                davbus_address = storage_area;
                davbus_write_word = value_insert;
                printf("\nWriting to DAVBus: %x \n", return_value);
                davbus_write();
                return;
            }
            else if ((address_grab >= 0xF3015000) && (address_grab < 0xF3016000)){
                mac_swim3_address = storage_area;
                swim3_write_byte = (uint8_t)value_insert;
                printf("Writing byte to SWIM3 address %x ... %x \n", address_grab, swim3_write_byte);
                mac_swim3_write();
                return;
            }
            else if ((address_grab >= 0xF3016000) && (address_grab < 0xF3018000)){
                via_cuda_address = storage_area;
                via_write_byte = (uint8_t)value_insert;
                printf("Writing byte to CUDA address %x ... %x \n", address_grab, via_write_byte);
                via_cuda_write();
                return;
            }
            else if ((address_grab >= 0xF3040000) && (address_grab < 0xF3080000)){
                openpic_address = storage_area - 0x3000000;
                openpic_write_word = value_insert;
                printf("Writing byte to OpenPIC address %x ... %x \n", address_grab, openpic_write_word);
                openpic_write();
                return;
            }
            else if (address_grab > 0xF3FFFFFF){
                printf("Uncharted territory: %x", address_grab);
                return;
            }
        grab_macmem_ptr = machine_iocontrolmem_mem;
    }
    else if (address_grab < rom_file_begin){
        //Get back to this! (weeny1)

        if (address_grab < 0xFE000000){
            storage_area = address_grab % 4096;
            grab_macmem_ptr = machine_f8xxxx_mem;
        }
        else if (address_grab < 0xFEC00000){
            mpc106_address = address_grab % 65536;
            mpc106_write(value_insert);
            return;
        }
        else if (address_grab < 0xFEE00000){
            storage_area = 0x0CF8;  //CONFIG_ADDR
            grab_macmem_ptr = machine_fecxxx_mem;
            value_insert = rev_endian32(value_insert);
            uint32_t reg_num = (value_insert & 0x07FC) >> 2;
            uint32_t dev_num = (value_insert & 0xF800) >> 11;
            printf("ADDRESS SET FOR GRACKLE \n");
            printf("Device Number: %d ", dev_num);
            printf("Hex Register Number: %x \n", reg_num);
            mpc_config_addr = value_insert;
        }
        else if (address_grab < 0xFF000000){
            storage_area = 0x0CFC;  //CONFIG_DATA
            mpc106_word_custom_size = num_bytes;
            mpc106_write_device(mpc_config_addr, value_insert, num_bytes);
            grab_macmem_ptr = machine_feexxx_mem;
        }
        else if (address_grab < 0xFF800000){
            storage_area = address_grab % 4096;
            grab_macmem_ptr = machine_ff00xx_mem;
        }
        else{
            storage_area = (address_grab % 1048576) + 0x400000;
            grab_macmem_ptr = machine_sysram_mem;
        }
    }
    else{
        storage_area = address_grab % rom_file_setsize;
        grab_macmem_ptr = machine_sysrom_mem;
    }

    ppc_memstore_value(value_insert, storage_area, num_bytes);
}

/** Grab a value from memory into a register */
void address_quickgrab_translate(uint32_t address_grab, uint8_t num_bytes)
{
    uint32_t storage_area = 0;

    //printf("Grabbing from address %x \n", address_grab);

    return_value = 0; //reset this before going into the real fun.

    /* data address translation if enabled */
    if (ppc_state.ppc_msr & 0x10) {
        printf("DATA RELOCATION GO! - GRABBING \n");

        address_grab = ppc_mmu_addr_translate(address_grab, 0);
    }

    if (address_grab >= 0xFFC00000){
        //printf("Charting ROM Area: %x \n", address_grab);
        storage_area = address_grab % rom_file_setsize;
        grab_macmem_ptr = machine_sysrom_mem;
        ppc_set_return_val(storage_area, num_bytes);
        return;
    }

    //regular grabbing
    else if (address_grab < 0x80000000){
        if (mpc106_check_membound(address_grab)){
            if (address_grab > 0x03ffffff){ //for debug purposes
                storage_area = address_grab;
                grab_macmem_ptr = machine_sysram_mem;
            }
            else if ((address_grab >= 0x40000000) && (address_grab < 0x40400000)){
                if (is_nubus){
                    storage_area = address_grab % rom_file_setsize;
                    grab_macmem_ptr = machine_sysrom_mem;
                    ppc_set_return_val(storage_area, num_bytes);
                    return;
                }
                else{
                    storage_area = address_grab;
                    grab_macmem_ptr = machine_sysram_mem;
                }
            }
            else if ((address_grab >= 0x5fffe000) && (address_grab <= 0x5fffffff)){
                storage_area = address_grab % 0x2000;
                grab_macmem_ptr = machine_sysconfig_mem;
            }
            else{
                return_value = (num_bytes == 1)?0xFF:(num_bytes == 2)?0xFFFF:0xFFFFFFFF;
                return;
            }
        }
        else{
            //The address is not within the ROM banks
            return_value = (num_bytes == 1)?0xFF:(num_bytes == 2)?0xFFFF:0xFFFFFFFF;
            return;
        }
    }
    else if (address_grab < 0x80800000){
        if ((address_grab >= 0x80040000) && (address_grab < 0x80080000)){
            openpic_address = address_grab - 0x80000000;
            openpic_write();
            return_value = openpic_write_word;
            return;
        }

        storage_area = address_grab % 0x800000;
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_upperiocontrol_mem;
    }
    else if (address_grab < 0x81000000){
        storage_area = address_grab;
        if (address_grab > 0x83FFFFFF){
            return_value = (num_bytes == 1)?0xFF:(num_bytes == 2)?0xFFFF:0xFFFFFFFF;
            return;
        }
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_iocontrolcdma_mem;
    }
    else if (address_grab < 0xBF800000){
        storage_area = address_grab % 33554432;
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_loweriocontrol_mem;
    }
    else if (address_grab < 0xC0000000){
        storage_area = address_grab % 16;
        printf("Uncharted territory: %x \n", address_grab);
        grab_macmem_ptr = machine_interruptack_mem;
    }
    else if (address_grab < 0xF0000000){
        return_value = (num_bytes == 1)?0xFF:(num_bytes == 2)?0xFFFF:0xFFFFFFFF;
        return;
    }
    else if (address_grab < 0xF8000000){
        storage_area = address_grab % 67108864;
            if ((address_grab >= 0xF3013000) && (address_grab < 0xF3013040)){
                mac_serial_address = storage_area;
                mac_serial_read();
                return_value = serial_read_byte;
                printf("\n Read from Serial: %x \n", return_value);
                return;
            }
            else if ((address_grab >= 0xF3014000) && (address_grab < 0xF3015000)){
                davbus_address = storage_area;
                davbus_read();
                return_value = davbus_read_word;
                printf("\n Read from DAVBus: %x \n", return_value);
                return;
            }
            else if ((address_grab >= 0xF3015000) && (address_grab < 0xF3016000)){
                mac_swim3_address = storage_area;
                mac_swim3_read();
                return_value = swim3_read_byte;
                printf("\n Read from Swim3: %x \n", return_value);
                return;
            }
            else if ((address_grab >= 0xF3016000) && (address_grab < 0xF3018000)){
                via_cuda_address = storage_area;
                via_cuda_read();
                return_value = via_read_byte;
                printf("\n Read from CUDA: %x \n", return_value);
                return;
            }
            else if ((address_grab >= 0xF3040000) && (address_grab < 0xF3080000)){
                openpic_address = storage_area - 0x3000000;
                openpic_read();
                return_value = openpic_write_word;
                return;
            }
            else if (address_grab > 0xF3FFFFFF){
                return_value = (num_bytes == 1)?0xFF:(num_bytes == 2)?0xFFFF:0xFFFFFFFF;
                return;
            }
        grab_macmem_ptr = machine_iocontrolmem_mem;
    }
    else if (address_grab < rom_file_begin){
        //Get back to this! (weeny1)
        if (address_grab < 0xFE000000){
            storage_area = address_grab % 4096;
            grab_macmem_ptr = machine_f8xxxx_mem;
        }
        else if (address_grab < 0xFEC00000){
            mpc106_address = address_grab % 65536;
            mpc106_read();
            return_value = mpc106_read_word;
            return;
        }
        else if (address_grab < 0xFEE00000){
            return_value = (num_bytes == 1)? (mpc106_address & 0xFF):(num_bytes == 2)?(mpc106_address & 0xFFFF):mpc106_address;
            return;
        }
        else if (address_grab < 0xFF000000){
            mpc106_word_custom_size = num_bytes;
            return_value = mpc106_read_device(mpc_config_addr, num_bytes);
            return_value = rev_endian32(return_value);
            return;
        }
        else if (address_grab < 0xFF800000){
            storage_area = address_grab % 4096;
            grab_macmem_ptr = machine_ff00xx_mem;
        }
        else{
            storage_area = (address_grab % 1048576) + 0x400000;
            grab_macmem_ptr = machine_sysram_mem;
        }
    }

    ppc_set_return_val(storage_area, num_bytes);

}

void quickinstruction_translate(uint32_t address_grab)
{
    uint32_t storage_area = 0;

    return_value = 0; //reset this before going into the real fun.

    /* instruction address translation if enabled */
    if (ppc_state.ppc_msr & 0x20) {
        printf("INSTRUCTION RELOCATION GO! \n");

        address_grab = ppc_mmu_instr_translate(address_grab);
    }

    //grab opcode from memory area
    if (address_grab >= 0xFFC00000){
        storage_area = address_grab % rom_file_setsize;
        grab_macmem_ptr = machine_sysrom_mem;
        ppc_set_cur_instruction(storage_area);
        return;
    }
    else if (address_grab < 0x80000000){
        if (address_grab < 0x040000000){ //for debug purposes
            storage_area = address_grab;
            grab_macmem_ptr = machine_sysram_mem;
        }
            else if ((address_grab >= 0x40000000) && (address_grab < 0x40400000)){
                if (is_nubus){
                    storage_area = address_grab % rom_file_setsize;
                    grab_macmem_ptr = machine_sysrom_mem;
                    ppc_set_cur_instruction(storage_area);
                    return;
                }
                else{
                    storage_area = address_grab;
                    grab_macmem_ptr = machine_sysram_mem;
                }
            }
        else if ((address_grab >= 0x5fffe000) && (address_grab <= 0x5fffffff)){
            storage_area = address_grab % 0x2000;
            grab_macmem_ptr = machine_sysconfig_mem;
        }
        else{
            storage_area = address_grab % 0x04000000;
            grab_macmem_ptr = machine_sysram_mem;
            printf("Uncharted territory: %x \n", address_grab);
        }
    }
    else if (address_grab < 0x80800000){
        storage_area = address_grab % 0x800000;
        grab_macmem_ptr = machine_upperiocontrol_mem;

    }
    else if (address_grab < 0x81000000){
        storage_area = address_grab % 0x800000;
        grab_macmem_ptr = machine_iocontrolcdma_mem;

    }
    else if (address_grab < 0xBF80000){
        storage_area = address_grab % 33554432;
        grab_macmem_ptr = machine_loweriocontrol_mem;

    }
    else if (address_grab < 0xC0000000){
        storage_area = address_grab % 16;
        grab_macmem_ptr = machine_interruptack_mem;

    }
    else if (address_grab < 0xF0000000){
        printf("Invalid Memory Attempt: %x \n", address_grab);
        return;
    }
    else if (address_grab < 0xF8000000){
        storage_area = address_grab % 67108864;
        grab_macmem_ptr = machine_iocontrolmem_mem;

    }
    else if (address_grab < rom_file_begin){
        //Get back to this! (weeny1)

        if (address_grab < 0xFE000000){
            storage_area = address_grab % 4096;
            grab_macmem_ptr = machine_f8xxxx_mem;
        }
        else if (address_grab < 0xFEC00000){
            storage_area = address_grab % 65536;
            grab_macmem_ptr = machine_fexxxx_mem;
        }
        else if (address_grab < 0xFEE00000){
            storage_area = 0x0CF8;  //CONFIG_ADDR
            grab_macmem_ptr = machine_fecxxx_mem;
        }
        else if (address_grab < 0xFF000000){
            storage_area = 0x0CFC;  //CONFIG_DATA
            grab_macmem_ptr = machine_feexxx_mem;
        }
        else if (address_grab < 0xFF800000){
            storage_area = address_grab % 4096;
            grab_macmem_ptr = machine_ff00xx_mem;
        }
        else{
            storage_area = (address_grab % 1048576) + 0x400000;
            grab_macmem_ptr = machine_sysram_mem;
        }
    }

    ppc_set_cur_instruction(storage_area);
}