X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=emulator.c;h=f9c1295e5c133bf4ba097abf3cc6d79a9c49c7f3;hb=a0664148fd697682704813658f0ffd51d1260bd3;hp=92edf8f2761dc5b29109a61fa0906668b568280a;hpb=31c070e8a4a6ba9ce4b70eac552d63e60474409d;p=pistorm

diff --git a/emulator.c b/emulator.c
index 92edf8f..f9c1295 100644
--- a/emulator.c
+++ b/emulator.c
@@ -1,838 +1,387 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <signal.h>
+#include <assert.h>
 #include <dirent.h>
+#include <endian.h>
 #include <fcntl.h>
-#include <assert.h>
+#include <pthread.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/mman.h>
-#include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
-#include <stdint.h>
-#include <sched.h>
+#include <sys/ioctl.h>
 #include "m68k.h"
 #include "main.h"
-#include<pthread.h>
-#include "Gayle.h"
-#include "ide.h"
- 
-//#define BCM2708_PERI_BASE        0x20000000  //pi0-1
-//#define BCM2708_PERI_BASE	0xFE000000     //pi4
-#define BCM2708_PERI_BASE       0x3F000000     //pi3
-#define BCM2708_PERI_SIZE       0x01000000
-#define GPIO_BASE               (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */
-#define GPCLK_BASE              (BCM2708_PERI_BASE + 0x101000)
-#define GPIO_ADDR                0x200000 /* GPIO controller */
-#define GPCLK_ADDR               0x101000
-#define CLK_PASSWD      0x5a000000
-#define CLK_GP0_CTL     0x070
-#define CLK_GP0_DIV     0x074
-
-#define SA0 5
-#define SA1 3
-#define SA2 2
-
-#define STATUSREGADDR    GPIO_CLR = 1<<SA0;GPIO_CLR = 1<<SA1;GPIO_SET = 1<<SA2;
-#define W16              GPIO_CLR = 1<<SA0;GPIO_CLR = 1<<SA1;GPIO_CLR = 1<<SA2;
-#define R16              GPIO_SET = 1<<SA0;GPIO_CLR = 1<<SA1;GPIO_CLR = 1<<SA2;
-#define W8               GPIO_CLR = 1<<SA0;GPIO_SET = 1<<SA1;GPIO_CLR = 1<<SA2;
-#define R8               GPIO_SET = 1<<SA0;GPIO_SET = 1<<SA1;GPIO_CLR = 1<<SA2;
-
-#define PAGE_SIZE (4*1024)
-#define BLOCK_SIZE (4*1024)
-
-#define GPIOSET(no, ishigh)           \
-do {                                  \
-        if (ishigh)                   \
-                set |= (1 << (no));   \
-        else                          \
-                reset |= (1 << (no)); \
-} while (0)
-
-
-#define FASTBASE 0x07FFFFFF
-#define FASTSIZE 0xFFFFFFF
-#define GAYLEBASE 0xD80000 //D7FFFF
-#define GAYLESIZE 0x6FFFF
-
-#define KICKBASE 0xF80000
-#define KICKSIZE 0x7FFFF
-
-int  mem_fd;
-int  mem_fd_gpclk;
-void *gpio_map;
-void *gpclk_map;
-
-// I/O access
-volatile unsigned int *gpio;
-volatile unsigned int *gpclk;
-volatile unsigned int gpfsel0;
-volatile unsigned int gpfsel1;
-volatile unsigned int gpfsel2;
-volatile unsigned int gpfsel0_o;
-volatile unsigned int gpfsel1_o;
-volatile unsigned int gpfsel2_o;
-
-// GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or SET_GPIO_ALT(x,y)
-#define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7<<(((g)%10)*3))
-#define OUT_GPIO(g) *(gpio+((g)/10)) |=  (1<<(((g)%10)*3))
-#define SET_GPIO_ALT(g,a) *(gpio+(((g)/10))) |= (((a)<=3?(a)+4:(a)==4?3:2)<<(((g)%10)*3))
-
-#define GPIO_SET *(gpio+7)  // sets   bits which are 1 ignores bits which are 0
-#define GPIO_CLR *(gpio+10) // clears bits which are 1 ignores bits which are 0
-
-#define GET_GPIO(g) (*(gpio+13)&(1<<g)) // 0 if LOW, (1<<g) if HIGH
-
-#define GPIO_PULL *(gpio+37) // Pull up/pull down
-#define GPIO_PULLCLK0 *(gpio+38) // Pull up/pull down clock
-
+#include "platforms/platforms.h"
+#include "input/input.h"
 
-void setup_io();
+#include "platforms/amiga/Gayle.h"
+#include "platforms/amiga/gayle-ide/ide.h"
+#include "platforms/amiga/amiga-registers.h"
+#include "platforms/amiga/rtg/rtg.h"
+#include "gpio/gpio.h"
 
-uint32_t read8(uint32_t address);
-void write8(uint32_t address, uint32_t data);
+int kb_hook_enabled = 0;
+int mouse_hook_enabled = 0;
+int cpu_emulation_running = 1;
 
-uint32_t read16(uint32_t address);
-void write16(uint32_t address, uint32_t data);
+char mouse_dx = 0, mouse_dy = 0;
+char mouse_buttons = 0;
 
-void write32(uint32_t address, uint32_t data);
-uint32_t read32(uint32_t address);
+extern volatile unsigned int *gpio;
+extern volatile uint16_t srdata;
 
-uint16_t read_reg(void);
-void write_reg(unsigned int value);
+#define KICKBASE 0xF80000
+#define KICKSIZE 0x7FFFF
 
-volatile uint16_t srdata;
-volatile uint32_t srdata2;
-volatile uint32_t srdata2_old;
+int mem_fd, mouse_fd = -1, keyboard_fd = -1;
+int mem_fd_gpclk;
+int gayle_emulation_enabled = 1;
 
+// Configurable emulator options
+unsigned int cpu_type = M68K_CPU_TYPE_68000;
+unsigned int loop_cycles = 300;
+struct emulator_config *cfg = NULL;
+char keyboard_file[256] = "/dev/input/event0";
 
-unsigned char g_kick[524288];
-unsigned char g_ram[FASTSIZE+1];                 /* RAM */
-unsigned char toggle;
-static volatile unsigned char ovl;
+//unsigned char g_kick[524288];
+//unsigned char g_ram[FASTSIZE + 1]; /* RAM */
+int ovl;
 static volatile unsigned char maprom;
 
+void sigint_handler(int sig_num) {
+  //if (sig_num) { }
+  //cpu_emulation_running = 0;
 
-/* Signal Handler for SIGINT */
-void sigint_handler(int sig_num)
-{
-    /* Reset handler to catch SIGINT next time.
-       Refer http://en.cppreference.com/w/c/program/signal */
-    printf("\n User provided signal handler for Ctrl+C \n");
-
-    /* Do a graceful cleanup of the program like: free memory/resources/etc and exit */
-    exit(0);
-}
+  //return;
+  printf("Received sigint %d, exiting.\n", sig_num);
+  if (mouse_fd != -1)
+    close(mouse_fd);
+  if (mem_fd)
+    close(mem_fd);
 
+  if (cfg->platform->shutdown) {
+    cfg->platform->shutdown(cfg);
+  }
 
-void* iplThread(void *args){ 
-
-printf("thread!/n");
-//srdata2_old = read_reg();
-//toggle = 0;
-
-while(42){
-//printf("thread!/n");
-  if (GET_GPIO(1) == 0){
-                  srdata = read_reg();
-                  if (srdata != srdata2_old){
-                        srdata2 = ((srdata >> 13)&0xff);
-                        //printf("STATUS: %d\n", srdata2);
-                        srdata2_old = srdata;
-                        m68k_set_irq(srdata2);
-                        toggle = 1;
-                        }
-                } else {
-                        if (toggle != 0){
-                        /*
-			srdata = read_reg();
-                        srdata2 = ((srdata >> 13)&0xff);
-                        srdata2_old = srdata;
-                        m68k_set_irq(srdata2);
-			*/
-			m68k_set_irq(0);
-                        //printf("STATUS: 0\n");
-                        toggle = 0;
-                        }
-                }
-
-	usleep(1);
-	}
+  exit(0);
 }
 
+int main(int argc, char *argv[]) {
+  int g;
+  const struct sched_param priority = {99};
+
+  // Some command line switch stuffles
+  for (g = 1; g < argc; g++) {
+    if (strcmp(argv[g], "--disable-gayle") == 0) {
+      gayle_emulation_enabled = 0;
+    }
+    else if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
+      if (g + 1 >= argc) {
+        printf("%s switch found, but no CPU type specified.\n", argv[g]);
+      } else {
+        g++;
+        cpu_type = get_m68k_cpu_type(argv[g]);
+      }
+    }
+    else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
+      if (g + 1 >= argc) {
+        printf("%s switch found, but no config filename specified.\n", argv[g]);
+      } else {
+        g++;
+        cfg = load_config_file(argv[g]);
+      }
+    }
+    else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
+      if (g + 1 >= argc) {
+        printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
+      } else {
+        g++;
+        strcpy(keyboard_file, argv[g]);
+      }
+    }
+  }
 
-int main() {
+  if (!cfg) {
+    printf("No config file specified. Trying to load default.cfg...\n");
+    cfg = load_config_file("default.cfg");
+    if (!cfg) {
+      printf("Couldn't load default.cfg, empty emulator config will be used.\n");
+      cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
+      if (!cfg) {
+        printf("Failed to allocate memory for emulator config!\n");
+        return 1;
+      }
+      memset(cfg, 0x00, sizeof(struct emulator_config));
+    }
+  }
 
+  if (cfg) {
+    if (cfg->cpu_type) cpu_type = cfg->cpu_type;
+    if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
 
-int g;
-const struct sched_param priority = {99};
+    if (!cfg->platform)
+      cfg->platform = make_platform_config("none", "generic");
+    cfg->platform->platform_initial_setup(cfg);
+  }
+
+  if (cfg->mouse_enabled) {
+    mouse_fd = open(cfg->mouse_file, O_RDONLY | O_NONBLOCK);
+    if (mouse_fd == -1) {
+      printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
+      cfg->mouse_enabled = 0;
+    }
+  }
 
-    sched_setscheduler(0, SCHED_RR , &priority);
-    mlockall(MCL_CURRENT); // lock in memory to keep us from paging out
+  keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
+  if (keyboard_fd == -1) {
+    printf("Failed to open keyboard event source.\n");
+  }
 
+  sched_setscheduler(0, SCHED_FIFO, &priority);
+  mlockall(MCL_CURRENT);  // lock in memory to keep us from paging out
 
   InitGayle();
 
   signal(SIGINT, sigint_handler);
   setup_io();
 
-  //Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending on pi model
-  printf("Enable GPCLK0 on GPIO4\n");
-
-        *(gpclk+ (CLK_GP0_CTL/4)) =  CLK_PASSWD | (1 << 5);
-        usleep(10);
-        while ( (*(gpclk+(CLK_GP0_CTL/4))) & (1 << 7));
-        usleep(100);
-        *(gpclk+(CLK_GP0_DIV/4)) =  CLK_PASSWD | (6 << 12); //divider , 6=200MHz on pi3
-        usleep(10);
-        *(gpclk+(CLK_GP0_CTL/4)) =   CLK_PASSWD | 5 | (1 << 4); //pll? 6=plld, 5=pllc
-        usleep(10);
-        while (((*(gpclk+(CLK_GP0_CTL/4))) & (1 << 7))== 0);
-        usleep(100);
-
-    SET_GPIO_ALT(4,0); //gpclk0
-
-   //set SA to output
-    INP_GPIO(2);
-    OUT_GPIO(2);
-    INP_GPIO(3);
-    OUT_GPIO(3);
-    INP_GPIO(5);
-    OUT_GPIO(5);
-
-  //set gpio0 (aux0) and gpio1 (aux1) to input
-  INP_GPIO(0);
-  INP_GPIO(1);
-
-  // Set GPIO pins 6,7 and 8-23 to output
-  for (g=6; g<=23; g++)
-  {
-    INP_GPIO(g);
-    OUT_GPIO(g);
-  }
-     printf ("Precalculate GPIO8-23 aus Output\n");
-     gpfsel0_o =*(gpio); //store gpio ddr
-     printf ("gpfsel0: %#x\n", gpfsel0_o);
-     gpfsel1_o =*(gpio+1); //store gpio ddr
-     printf ("gpfsel1: %#x\n", gpfsel1_o);
-     gpfsel2_o =*(gpio+2); //store gpio ddr
-     printf ("gpfsel2: %#x\n", gpfsel2_o);
-
-  // Set GPIO pins 8-23 to input
-  for (g=8; g<=23; g++)
-  {
-    INP_GPIO(g);
-  }
-     printf ("Precalculate GPIO8-23 as Input\n");
-     gpfsel0 =*(gpio); //store gpio ddr
-     printf ("gpfsel0: %#x\n", gpfsel0);
-     gpfsel1 =*(gpio+1); //store gpio ddr
-     printf ("gpfsel1: %#x\n", gpfsel1);
-     gpfsel2 =*(gpio+2); //store gpio ddr
-     printf ("gpfsel2: %#x\n", gpfsel2);
-
- GPIO_CLR = 1<<2;
- GPIO_CLR = 1<<3;
- GPIO_SET = 1<<5;
-
- GPIO_SET = 1<<6;
- GPIO_SET = 1<<7;
-
- //reset cpld statemachine first
-
- write_reg(0x01);
- usleep(100);
- usleep(1500);
- write_reg(0x00);
- usleep(100);
-
-/*
- maprom = 0;
- FILE * fp;
- fp = fopen("kick.rom", "rb");
- if (!fp)
- {
- printf("kick.rom cannot be opened\n");
- } else {
- printf("kick.rom found, using that instead of motherboard rom\n");
- while (1)
-  {
-  unsigned int reads = fread(&g_kick, sizeof(g_kick), 1, fp);
-  if (reads == 0){
-     printf("failed loading kick.rom\n");
-     }else{
-     printf("loaded kick.rom\n");
-     maprom = 1;
-     }
-  break;
-  }
- }
- */
- maprom = 1;
- int fd=0;
- fd = open("kick.rom",O_RDONLY);
- if(fd<1){
-	printf("failed loading kick.rom, using motherboard kickstart\n");
-	maprom = 0;
-	}else{
- 	int size = (int)lseek(fd, 0, SEEK_END);
- 	if(size==0x40000){
-         lseek(fd, 0, SEEK_SET);
-         read(fd, &g_kick, size);
-         lseek(fd, 0, SEEK_SET);
-         read(fd, &g_kick[0x40000], size);
-    	}else{
-         lseek(fd, 0, SEEK_SET);
-         read(fd, &g_kick, size);
-    	 }
- 	 printf("loaded kick.rom with size %d kib\n",size/1024);
-	}
-
-
-cpu_pulse_reset();
-
- ovl=1;
- m68k_write_memory_8(0xbfe201,0x0001); //AMIGA OVL
- m68k_write_memory_8(0xbfe001,0x0001); //AMIGA OVL high (ROM@0x0)
- //cpu_pulse_reset();
-
- usleep(1500);
-
-	m68k_init();
-	m68k_set_cpu_type(M68K_CPU_TYPE_68030);
-	m68k_pulse_reset();
-
-	if (maprom == 1){
-	m68k_set_reg(M68K_REG_PC, 0xF80002);
-	}else{
-	m68k_set_reg(M68K_REG_PC, 0x0);
-	}
-
-/*
-         pthread_t id;
-         int err;
-        //err = pthread_create(&id, NULL, &iplThread, NULL);
-        if (err != 0)
-            printf("\ncan't create IPL thread :[%s]", strerror(err));
-        else
-            printf("\n IPL Thread created successfully\n");
-*/
-
-	m68k_pulse_reset();
-	while(42) {
-
-		m68k_execute(3000);
-		if (GET_GPIO(1) == 0){
-		 srdata = read_reg();
-		 m68k_set_irq((srdata >> 13)&0xff);
-		} else {
-		 m68k_set_irq(0);
-		};
-	}
-
-	return 0;
-}
-
+  //goto skip_everything;
 
+  // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
+  // on pi model
+  printf("Enable 200MHz GPCLK0 on GPIO4\n");
+  gpio_enable_200mhz();
 
-void cpu_pulse_reset(void){
+  // reset cpld statemachine first
 
-	write_reg(0x00);
-	 printf("Status Reg%x\n",read_reg());
-        usleep(100000);
-	write_reg(0x02);
-	printf("Status Reg%x\n",read_reg());
-}
+  write_reg(0x01);
+  usleep(100);
+  usleep(1500);
+  write_reg(0x00);
+  usleep(100);
 
+  // reset amiga and statemachine
+  skip_everything:;
+  cpu_pulse_reset();
+  ovl = 1;
+  m68k_write_memory_8(0xbfe201, 0x0001);  // AMIGA OVL
+  m68k_write_memory_8(0xbfe001, 0x0001);  // AMIGA OVL high (ROM@0x0)
 
+  usleep(1500);
 
+  m68k_init();
+  printf("Setting CPU type to %d.\n", cpu_type);
+  m68k_set_cpu_type(cpu_type);
+  m68k_pulse_reset();
 
-int cpu_irq_ack(int level)
-{
-    printf("cpu irq ack\n");
-    return level;
-}
-
-
-
-unsigned int  m68k_read_memory_8(unsigned int address){
-
-
-        if (maprom == 1){
-         if(address>KICKBASE && address<KICKBASE + KICKSIZE){
-          return g_kick[address-KICKBASE];
-          }
-        }
-
-	if(address>GAYLEBASE && address<GAYLEBASE + GAYLESIZE){
-        return readGayleB(address);
-    	}
+  if (maprom == 1) {
+    m68k_set_reg(M68K_REG_PC, 0xF80002);
+  } else {
+    m68k_set_reg(M68K_REG_PC, 0x0);
+  }
 
-        if(address>FASTBASE && address<FASTBASE + FASTSIZE){
-        return g_ram[address- FASTBASE];
+  char c = 0;
+
+  m68k_pulse_reset();
+  while (42) {
+    if (mouse_hook_enabled) {
+      if (get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons)) {
+        //printf("Maus: %d (%.2X), %d (%.2X), B:%.2X\n", mouse_dx, mouse_dx, mouse_dy, mouse_dy, mouse_buttons);
+      }
+    }
+
+    if (cpu_emulation_running)
+      m68k_execute(loop_cycles);
+    
+    // FIXME: Rework this to use keyboard events instead.
+    /*while (get_key_char(&c)) {
+      if (c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
+        kb_hook_enabled = 1;
+        printf("Keyboard hook enabled.\n");
+      }
+      else if (c == 0x1B && kb_hook_enabled) {
+        kb_hook_enabled = 0;
+        printf("Keyboard hook disabled.\n");
+      }
+      if (!kb_hook_enabled) {
+        if (c == cfg->mouse_toggle_key) {
+          mouse_hook_enabled ^= 1;
+          printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
+          mouse_dx = mouse_dy = mouse_buttons = 0;
         }
-
-	/*
-            if (ovl == 1 && address<KICKSIZE){
-               return g_kick[address];}
-               if (ovl == 0 && (address>KICKBASE && address<KICKBASE + KICKSIZE)){
-               return g_kick[address-KICKBASE];}
-	}
-	*/
-	if (address < 0xffffff){
-         return read8((uint32_t)address);
-	}
-
-	return 0;
-}
-
-unsigned int  m68k_read_memory_16(unsigned int address){
-
-
-        if (maprom == 1){
-          if(address>KICKBASE && address<KICKBASE + KICKSIZE){
-           uint16_t value = *(uint16_t*)&g_kick[address-KICKBASE];
-           value = (value << 8) | (value >> 8);
-           return value;
-          }
+        if (c == 'r') {
+          cpu_emulation_running ^= 1;
+          printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
         }
-
-	if(address>GAYLEBASE && address<GAYLEBASE + GAYLESIZE){
-        return readGayle(address);
-    	}
-
-        if(address>FASTBASE && address<FASTBASE + FASTSIZE){
-        uint16_t value = *(uint16_t*)&g_ram[address- FASTBASE];
-        value = (value << 8) | (value >> 8);
-	return value;
+        if (c == 'R') {
+          cpu_pulse_reset();
+          m68k_pulse_reset();
+          printf("CPU emulation reset.\n");
         }
-
-/*
-	if (maprom == 1){
-	    if (ovl == 1 && address<KICKSIZE ){
-	       uint16_t value = *(uint16_t*)&g_kick[address];
-	       return (value << 8) | (value >> 8);}
-              if (ovl == 0 && (address>KICKBASE && address<KICKBASE + KICKSIZE)){
- 	       //printf("kread16 addr: %x\n",address);
-	       uint16_t value = *(uint16_t*)&g_kick[address-KICKBASE];
-	       return (value << 8) | (value >> 8);}
+        if (c == 'q') {
+          printf("Quitting and exiting emulator.\n");
+          goto stop_cpu_emulation;
         }
-*/
-	if (address < 0xffffff){
-        return (unsigned int)read16((uint32_t)address);
-	}
-
-	return 0;
-}
+      }
+    }*/
 
-unsigned int  m68k_read_memory_32(unsigned int address){
-
-        if (maprom == 1){
-          if(address>KICKBASE && address<KICKBASE + KICKSIZE){
-            uint32_t value = *(uint32_t*)&g_kick[address-KICKBASE];
-            value = ((value << 8) & 0xFF00FF00 ) | ((value >> 8) & 0xFF00FF );
-            return value << 16 | value >> 16;
-            }
-        }
+    //gpio_handle_irq();
+    GPIO_HANDLE_IRQ;
+  }
 
-	if(address>GAYLEBASE && address<GAYLEBASE + GAYLESIZE){
-         return readGayleL(address);
-    	}
+  stop_cpu_emulation:;
 
- 	if(address>FASTBASE && address<FASTBASE + FASTSIZE){
-	uint32_t value = *(uint32_t*)&g_ram[address- FASTBASE];
-        value = ((value << 8) & 0xFF00FF00 ) | ((value >> 8) & 0xFF00FF );
-        return value << 16 | value >> 16;
-        }
+  if (mouse_fd != -1)
+    close(mouse_fd);
+  if (mem_fd)
+    close(mem_fd);
 
-/*
-        if (maprom == 1){
-            if (ovl == 1 && address<KICKSIZE){
-              uint32_t value = *(uint32_t*)&g_kick[address];
-              value = ((value << 8) & 0xFF00FF00 ) | ((value >> 8) & 0xFF00FF );
-              return value << 16 | value >> 16;}
-            if (ovl == 0 && (address>KICKBASE && address<KICKBASE + KICKSIZE)){
-               //printf("kread32/n");
-	       uint32_t value = *(uint32_t*)&g_kick[address-KICKBASE];
-               value = ((value << 8) & 0xFF00FF00 ) | ((value >> 8) & 0xFF00FF );
-               return value << 16 | value >> 16;}
-        }
-*/
-	if (address < 0xffffff){
-            uint16_t a = read16(address);
-            uint16_t b = read16(address+2);
-	    return (a << 16) | b;
-	   }
-
-	return 0;
+  return 0;
 }
 
-void m68k_write_memory_8(unsigned int address, unsigned int value){
-
-
-	if (address == 0xbfe001){
-	ovl = (value & (1<<0));
-        printf("OVL:%x\n", ovl );
-	}
-
-
-  	if(address>GAYLEBASE && address<GAYLEBASE + GAYLESIZE){
-        writeGayleB(address, value);
-        return;
-    	}
-
-
-      if(address>FASTBASE && address<FASTBASE + FASTSIZE){
-	g_ram[address- FASTBASE] = value;
-        return;
-        }
-
-	if (address < 0xffffff){
-	 write8((uint32_t)address,value);
-	 return;
-	}
-
-	return;
+void cpu_pulse_reset(void) {
+  write_reg(0x00);
+  // printf("Status Reg%x\n",read_reg());
+  usleep(100000);
+  write_reg(0x02);
+  // printf("Status Reg%x\n",read_reg());
 }
 
-void m68k_write_memory_16(unsigned int address, unsigned int value){
-//        if (address==0xdff030) printf("%c", value);
-
- 	if(address>GAYLEBASE && address<GAYLEBASE + GAYLESIZE){
-        writeGayle(address,value);
-        return;
-    	}
-
-	if (address == 0xbfe001)
-	printf("16CIA Output:%x\n", value );
-
-
-      if(address>FASTBASE && address<FASTBASE + FASTSIZE ){
-	uint16_t* dest = (uint16_t*)&g_ram[address- FASTBASE];
-    	value = (value << 8) | (value >> 8);
-    	*dest = value;
-        return;
-        }
-
-	if (address < 0xffffff){
-         write16((uint32_t)address,value);
-	 return;
-	}
-      return;
+int cpu_irq_ack(int level) {
+  printf("cpu irq ack\n");
+  return level;
 }
 
-void m68k_write_memory_32(unsigned int address, unsigned int value){
-
-
-	if(address>GAYLEBASE && address<GAYLEBASE + GAYLESIZE){
-        writeGayleL(address, value);
-    	}
-
-        if(address>FASTBASE && address<FASTBASE + FASTSIZE ){
-	   uint32_t* dest = (uint32_t*)&g_ram[address- FASTBASE];
-           value = ((value << 8) & 0xFF00FF00 ) | ((value >> 8) & 0xFF00FF );
-           value = value << 16 | value >> 16;
-           *dest = value;
-        return;
-        }
-
-       if (address < 0xffffff){
-	write16(address , value >> 16);
-	write16(address+2 , value );
-	return;
-       }
+static unsigned int target = 0;
+
+#define PLATFORM_CHECK_READ(a) \
+  if (address >= cfg->custom_low && address < cfg->custom_high) { \
+    unsigned int target = 0; \
+    switch(cfg->platform->id) { \
+      case PLATFORM_AMIGA: { \
+        if (address >= PIGFX_RTG_BASE && address < PIGFX_RTG_BASE + PIGFX_RTG_SIZE) { \
+          return rtg_read((address & 0x0FFFFFFF), a); \
+        } \
+        if (custom_read_amiga(cfg, address, &target, a) != -1) { \
+          return target; \
+        } \
+        break; \
+      } \
+      default: \
+        break; \
+    } \
+  } \
+  if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
+    if (handle_mapped_read(cfg, address, &target, a) != -1) \
+      return target; \
+  }
 
-      return;
-}
+unsigned int m68k_read_memory_8(unsigned int address) {
+  PLATFORM_CHECK_READ(OP_TYPE_BYTE);
 
-/*
-void write32(uint32_t address, uint32_t data){
-        write16(address+2 , data);
-        write16(address , data >>16 );
+    address &=0xFFFFFF;
+    return read8((uint32_t)address);
 }
 
-uint32_t read32(uint32_t address){
-        uint16_t a = read16(address+2);
-        uint16_t b = read16(address);
-        return (a>>16)|b;
-}
-*/
-
-void write16(uint32_t address, uint32_t data)
-{
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
- uint32_t data_s = (data & 0x0000ffff) << 8;
- uint32_t data_r = (~data & 0x0000ffff) << 8;
-
-  //      asm volatile ("dmb" ::: "memory");
-        W16
-        *(gpio) = gpfsel0_o;
-        *(gpio + 1) = gpfsel1_o;
-        *(gpio + 2) = gpfsel2_o;
-
-        *(gpio + 7) = addr_h_s;
-        *(gpio + 10) = addr_h_r;
-	while ((GET_GPIO(0)));
-        GPIO_CLR = 1 << 7;
-	GPIO_SET = 1 << 7;
-
-	*(gpio + 7) = addr_l_s;
-        *(gpio + 10) = addr_l_r;
-        GPIO_CLR = 1 << 7;
-	GPIO_SET = 1 << 7;
-
-        //write phase
-        *(gpio + 7) = data_s;
-        *(gpio + 10) = data_r;
-        GPIO_CLR = 1 << 7;
-	GPIO_SET = 1 << 7;
-
-        *(gpio) = gpfsel0;
-        *(gpio + 1) = gpfsel1;
-        *(gpio + 2) = gpfsel2;
-   //     while ((GET_GPIO(0)));
-   //     asm volatile ("dmb" ::: "memory");
-}
+unsigned int m68k_read_memory_16(unsigned int address) {
+  PLATFORM_CHECK_READ(OP_TYPE_WORD);
+
+  if (mouse_hook_enabled) {
+    if (address == JOY0DAT) {
+      // Forward mouse valueses to Amyga.
+      unsigned short result = (mouse_dy << 8) | (mouse_dx);
+      mouse_dx = mouse_dy = 0;
+      return (unsigned int)result;
+    }
+    if (address == CIAAPRA) {
+      unsigned short result = (unsigned int)read16((uint32_t)address);
+      if (mouse_buttons & 0x01) {
+        mouse_buttons -= 1;
+        return (unsigned int)(result | 0x40);
+      }
+      else
+          return (unsigned int)result;
+    }
+    if (address == POTGOR) {
+      unsigned short result = (unsigned int)read16((uint32_t)address);
+      if (mouse_buttons & 0x02) {
+        mouse_buttons -= 2;
+        return (unsigned int)(result | 0x2);
+      }
+      else
+          return (unsigned int)result;
+    }
+  }
 
 
-void write8(uint32_t address, uint32_t data)
-{
-
-        if ((address & 1) == 0)
-            data = data + (data << 8); //EVEN, A0=0,UDS
-        else data = data & 0xff ; //ODD , A0=1,LDS
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
- uint32_t data_s = (data & 0x0000ffff) << 8;
- uint32_t data_r = (~data & 0x0000ffff) << 8;
- 
-
-     //   asm volatile ("dmb" ::: "memory");
-        W8
-        *(gpio) = gpfsel0_o;
-        *(gpio + 1) = gpfsel1_o;
-        *(gpio + 2) = gpfsel2_o;
-
-        *(gpio + 7) = addr_h_s;
-        *(gpio + 10) = addr_h_r;
-	//while ((GET_GPIO(0)));
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-        *(gpio + 7) = addr_l_s;
-        *(gpio + 10) = addr_l_r;
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-        //write phase
-        *(gpio + 7) = data_s;
-        *(gpio + 10) = data_r;
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-        *(gpio) = gpfsel0;
-        *(gpio + 1) = gpfsel1;
-        *(gpio + 2) = gpfsel2;
-        while ((GET_GPIO(0)));
-     //   asm volatile ("dmb" ::: "memory");
-     //	GPIO_SET = 1 << 7;
+  address &=0xFFFFFF;
+  return (unsigned int)read16((uint32_t)address);
 }
 
+unsigned int m68k_read_memory_32(unsigned int address) {
+  PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
 
-uint32_t read16(uint32_t address)
-{
-        volatile int val;
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
-
-     //   asm volatile ("dmb" ::: "memory");
-        R16
-
-        *(gpio) = gpfsel0_o;
-        *(gpio + 1) = gpfsel1_o;
-        *(gpio + 2) = gpfsel2_o;
-
-        *(gpio + 7) = addr_h_s;
-        *(gpio + 10) = addr_h_r;
-  	while ((GET_GPIO(0)));
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-        *(gpio + 7) = addr_l_s;
-        *(gpio + 10) = addr_l_r;
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-
-        //read phase
-
-        *(gpio) = gpfsel0;
-        *(gpio + 1) = gpfsel1;
-        *(gpio + 2) = gpfsel2;
-
-        GPIO_CLR = 1 << 6;
-        while (!(GET_GPIO(0)));
-        GPIO_CLR = 1 << 6;
-//        asm volatile ("nop" ::);
-//	asm volatile ("nop" ::);
-//	asm volatile ("nop" ::);
-	val = *(gpio + 13);
-        GPIO_SET = 1 << 6;
-    //    asm volatile ("dmb" ::: "memory");
-        return (val >>8)&0xffff;
+  address &=0xFFFFFF;
+  uint16_t a = read16(address);
+  uint16_t b = read16(address + 2);
+  return (a << 16) | b;
 }
 
+#define PLATFORM_CHECK_WRITE(a) \
+  if (address >= cfg->custom_low && address < cfg->custom_high) { \
+    switch(cfg->platform->id) { \
+      case PLATFORM_AMIGA: { \
+        if (address >= PIGFX_RTG_BASE && address < PIGFX_RTG_BASE + PIGFX_RTG_SIZE) { \
+          rtg_write((address & 0x0FFFFFFF), value, a); \
+          return; \
+        } \
+        if (custom_write_amiga(cfg, address, value, a) != -1) { \
+          return; \
+        } \
+        break; \
+      } \
+      default: \
+        break; \
+    } \
+  } \
+  if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
+    if (handle_mapped_write(cfg, address, value, a) != -1) \
+      return; \
+  }
 
-uint32_t read8(uint32_t address)
-{
-        int val;
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
-
-    //    asm volatile ("dmb" ::: "memory");
-        R8
-        *(gpio) = gpfsel0_o;
-        *(gpio + 1) = gpfsel1_o;
-        *(gpio + 2) = gpfsel2_o;
-
-        *(gpio + 7) = addr_h_s;
-        *(gpio + 10) = addr_h_r;
-	while ((GET_GPIO(0)));
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-        *(gpio + 7) = addr_l_s;
-        *(gpio + 10) = addr_l_r;
-        GPIO_CLR = 1 << 7;
-        GPIO_SET = 1 << 7;
-
-        //read phase
-
-        *(gpio) = gpfsel0;
-        *(gpio + 1) = gpfsel1;
-        *(gpio + 2) = gpfsel2;
-
-        GPIO_CLR = 1 << 6;
-        while (!(GET_GPIO(0)));
-        GPIO_CLR = 1 << 6;
-//	asm volatile ("nop" ::);
-//	asm volatile ("nop" ::);
-//	asm volatile ("nop" ::);
-        val = *(gpio + 13);
-        GPIO_SET = 1 << 6;
-    //    asm volatile ("dmb" ::: "memory");
-
-	val = (val >>8)&0xffff;
-        if ((address & 1) == 0)
-            val = (val >> 8) & 0xff ; //EVEN, A0=0,UDS
-        else
-            val = val & 0xff ; //ODD , A0=1,LDS
-	return val;
-}
-
+void m68k_write_memory_8(unsigned int address, unsigned int value) {
+  PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
 
+  if (address == 0xbfe001) {
+    if (ovl != (value & (1 << 0))) {
+      ovl = (value & (1 << 0));
+      printf("OVL:%x\n", ovl);
+    }
+  }
 
-/******************************************************/
-
-void write_reg(unsigned int value)
-{
-        asm volatile ("dmb" ::: "memory");
-        STATUSREGADDR
-        asm volatile ("nop" ::);
-        asm volatile ("nop" ::);
-        asm volatile ("nop" ::);
-        //Write Status register
-        GPIO_CLR = 1 << SA0;
-        GPIO_CLR = 1 << SA1;
-        GPIO_SET = 1 << SA2;
-
-        *(gpio) = gpfsel0_o;
-        *(gpio + 1) = gpfsel1_o;
-        *(gpio + 2) = gpfsel2_o;
-        *(gpio + 7) = (value & 0xffff) << 8;
-        *(gpio + 10) = (~value & 0xffff) << 8;
-        GPIO_CLR = 1 << 7;
-        GPIO_CLR = 1 << 7; //delay
-        GPIO_SET = 1 << 7;
-	GPIO_SET = 1 << 7;
-        //Bus HIGH-Z
-        *(gpio) = gpfsel0;
-        *(gpio + 1) = gpfsel1;
-        *(gpio + 2) = gpfsel2;
-        asm volatile ("dmb" ::: "memory");
+  address &=0xFFFFFF;
+  write8((uint32_t)address, value);
+  return;
 }
 
+void m68k_write_memory_16(unsigned int address, unsigned int value) {
+  PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
 
-uint16_t read_reg(void)
-{
-        uint32_t val;
-
-        asm volatile ("dmb" ::: "memory");
-        STATUSREGADDR
-        asm volatile ("nop" ::);
-        asm volatile ("nop" ::);
-        asm volatile ("nop" ::);
-        //Bus HIGH-Z
-        *(gpio) = gpfsel0;
-        *(gpio + 1) = gpfsel1;
-        *(gpio + 2) = gpfsel2;
-
-        GPIO_CLR = 1 << 6;
-        GPIO_CLR = 1 << 6;      //delay
-	GPIO_CLR = 1 << 6;
-	GPIO_CLR = 1 << 6;
-        asm volatile ("nop" ::);
-        asm volatile ("nop" ::);
-        asm volatile ("nop" ::);
-        val = *(gpio + 13);
-        GPIO_SET = 1 << 6;
-        asm volatile ("dmb" ::: "memory");
-
-        return (uint16_t)(val >> 8);
+  address &=0xFFFFFF;
+  write16((uint32_t)address, value);
+  return;
 }
 
+void m68k_write_memory_32(unsigned int address, unsigned int value) {
+  PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
 
-//
-// Set up a memory regions to access GPIO
-//
-void setup_io()
-{
-   /* open /dev/mem */
-   if ((mem_fd = open("/dev/mem", O_RDWR|O_SYNC) ) < 0) {
-      printf("can't open /dev/mem \n");
-      exit(-1);
-   }
-
-   /* mmap GPIO */
-   gpio_map = mmap(
-      NULL,             //Any adddress in our space will do
-      BCM2708_PERI_SIZE,       //Map length
-      PROT_READ|PROT_WRITE,// Enable reading & writting to mapped memory
-      MAP_SHARED,       //Shared with other processes
-      mem_fd,           //File to map
-      BCM2708_PERI_BASE //Offset to GPIO peripheral
-   );
-
-   close(mem_fd); //No need to keep mem_fd open after mmap
-
-   if (gpio_map == MAP_FAILED) {
-      printf("gpio mmap error %d\n", (int)gpio_map);//errno also set!
-      exit(-1);
-   }
-
-   gpio = ((volatile unsigned *)gpio_map) + GPIO_ADDR/4;
-   gpclk = ((volatile unsigned *)gpio_map) + GPCLK_ADDR/4;
-
-
-} // setup_io
-
+  address &=0xFFFFFF;
+  write16(address, value >> 16);
+  write16(address + 2, value);
+  return;
+}