3 #include "platforms/platforms.h"
4 #include "input/input.h"
6 #include "platforms/amiga/Gayle.h"
7 #include "platforms/amiga/gayle-ide/ide.h"
8 #include "platforms/amiga/amiga-registers.h"
9 #include "platforms/amiga/rtg/rtg.h"
10 #include "platforms/amiga/hunk-reloc.h"
11 #include "platforms/amiga/piscsi/piscsi.h"
12 #include "platforms/amiga/piscsi/piscsi-enums.h"
13 #include "platforms/amiga/net/pi-net.h"
14 #include "platforms/amiga/net/pi-net-enums.h"
15 #include "gpio/ps_protocol.h"
28 #include <sys/ioctl.h>
31 #include <sys/types.h>
35 unsigned char read_ranges;
36 unsigned int read_addr[8];
37 unsigned int read_upper[8];
38 unsigned char *read_data[8];
39 unsigned char write_ranges;
40 unsigned int write_addr[8];
41 unsigned int write_upper[8];
42 unsigned char *write_data[8];
44 int kb_hook_enabled = 0;
45 int mouse_hook_enabled = 0;
46 int cpu_emulation_running = 1;
48 uint8_t mouse_dx = 0, mouse_dy = 0;
49 uint8_t mouse_buttons = 0;
50 uint8_t mouse_extra = 0;
52 extern uint8_t gayle_int;
53 extern uint8_t gayle_ide_enabled;
54 extern uint8_t gayle_emulation_enabled;
55 extern uint8_t gayle_a4k_int;
56 extern volatile unsigned int *gpio;
57 extern volatile uint16_t srdata;
58 extern uint8_t realtime_graphics_debug;
59 uint8_t realtime_disassembly, int2_enabled = 0;
60 uint32_t do_disasm = 0, old_level;
62 char disasm_buf[4096];
64 #define KICKBASE 0xF80000
65 #define KICKSIZE 0x7FFFF
67 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
76 extern m68ki_cpu_core m68ki_cpu;
77 extern int m68ki_initial_cycles;
78 extern int m68ki_remaining_cycles;
80 #define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \
81 CPU_INT_LEVEL = (i << 8); \
82 if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \
83 m68ki_cpu.nmi_pending = TRUE;
84 #define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \
87 #define M68K_SET_IRQ m68k_set_irq
88 #define M68K_END_TIMESLICE m68k_end_timeslice()
91 #define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop");
93 #define DEBUG_EMULATOR
100 // Configurable emulator options
101 unsigned int cpu_type = M68K_CPU_TYPE_68000;
102 unsigned int loop_cycles = 300, irq_status = 0;
103 struct emulator_config *cfg = NULL;
104 char keyboard_file[256] = "/dev/input/event1";
106 uint64_t trig_irq = 0, serv_irq = 0;
107 uint16_t irq_delay = 0;
109 void *iplThread(void *args) {
110 printf("IPL thread running\n");
111 uint16_t old_irq = 0;
115 value = *(gpio + 13);
117 if (!(value & (1 << PIN_IPL_ZERO))) {
136 if (gayle_ide_enabled) {
137 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
138 //get_ide(0)->drive[0].intrq = 0;
146 NOP NOP NOP NOP NOP NOP NOP NOP
147 NOP NOP NOP NOP NOP NOP NOP NOP
148 NOP NOP NOP NOP NOP NOP NOP NOP
149 /*NOP NOP NOP NOP NOP NOP NOP NOP
150 NOP NOP NOP NOP NOP NOP NOP NOP
151 NOP NOP NOP NOP NOP NOP NOP NOP*/
156 void stop_cpu_emulation(uint8_t disasm_cur) {
159 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
160 printf("REGA: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), m68k_get_reg(NULL, M68K_REG_A2), m68k_get_reg(NULL, M68K_REG_A3), \
161 m68k_get_reg(NULL, M68K_REG_A4), m68k_get_reg(NULL, M68K_REG_A5), m68k_get_reg(NULL, M68K_REG_A6), m68k_get_reg(NULL, M68K_REG_A7));
162 printf("REGD: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_D2), m68k_get_reg(NULL, M68K_REG_D3), \
163 m68k_get_reg(NULL, M68K_REG_D4), m68k_get_reg(NULL, M68K_REG_D5), m68k_get_reg(NULL, M68K_REG_D6), m68k_get_reg(NULL, M68K_REG_D7));
164 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
165 realtime_disassembly = 1;
168 cpu_emulation_running = 0;
173 static volatile unsigned char maprom;
175 void sigint_handler(int sig_num) {
177 //cpu_emulation_running = 0;
180 printf("Received sigint %d, exiting.\n", sig_num);
186 if (cfg->platform->shutdown) {
187 cfg->platform->shutdown(cfg);
190 printf("IRQs triggered: %lld\n", trig_irq);
191 printf("IRQs serviced: %lld\n", serv_irq);
196 int main(int argc, char *argv[]) {
198 //const struct sched_param priority = {99};
201 irq_delay = atoi(argv[1]);
202 printf("Setting IRQ delay to %d loops (%s).\n", irq_delay, argv[1]);
205 // Some command line switch stuffles
206 for (g = 1; g < argc; g++) {
207 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
209 printf("%s switch found, but no CPU type specified.\n", argv[g]);
212 cpu_type = get_m68k_cpu_type(argv[g]);
215 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
217 printf("%s switch found, but no config filename specified.\n", argv[g]);
220 cfg = load_config_file(argv[g]);
223 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
225 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
228 strcpy(keyboard_file, argv[g]);
234 printf("No config file specified. Trying to load default.cfg...\n");
235 cfg = load_config_file("default.cfg");
237 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
238 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
240 printf("Failed to allocate memory for emulator config!\n");
243 memset(cfg, 0x00, sizeof(struct emulator_config));
248 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
249 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
252 cfg->platform = make_platform_config("none", "generic");
253 cfg->platform->platform_initial_setup(cfg);
256 if (cfg->mouse_enabled) {
257 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
258 if (mouse_fd == -1) {
259 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
260 cfg->mouse_enabled = 0;
263 * *-*-*-* magic numbers! *-*-*-*
264 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
265 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
266 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
267 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
268 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
270 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
271 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
272 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
273 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
274 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
276 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
280 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
281 if (keyboard_fd == -1) {
282 printf("Failed to open keyboard event source.\n");
287 signal(SIGINT, sigint_handler);
290 //goto skip_everything;
292 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
294 printf("Enable 200MHz GPCLK0 on GPIO4\n");
295 gpio_enable_200mhz();
297 // reset cpld statemachine first
305 // reset amiga and statemachine
311 printf("Setting CPU type to %d.\n", cpu_type);
312 m68k_set_cpu_type(cpu_type);
316 m68k_set_reg(M68K_REG_PC, 0xF80002);
318 m68k_set_reg(M68K_REG_PC, 0x0);
321 ps_reset_state_machine();
326 printf("Setting CPU type to %d.\n", cpu_type);
327 m68k_set_cpu_type(cpu_type);
330 char c = 0, c_code = 0, c_type = 0;
331 uint32_t last_irq = 0, last_last_irq = 0;
335 err = pthread_create(&id, NULL, &iplThread, NULL);
337 printf("can't create IPL thread :[%s]", strerror(err));
339 printf("IPL Thread created successfully\n");
343 if (mouse_hook_enabled) {
344 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
347 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
348 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
349 printf("REGA: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), m68k_get_reg(NULL, M68K_REG_A2), m68k_get_reg(NULL, M68K_REG_A3), \
350 m68k_get_reg(NULL, M68K_REG_A4), m68k_get_reg(NULL, M68K_REG_A5), m68k_get_reg(NULL, M68K_REG_A6), m68k_get_reg(NULL, M68K_REG_A7));
351 printf("REGD: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_D2), m68k_get_reg(NULL, M68K_REG_D3), \
352 m68k_get_reg(NULL, M68K_REG_D4), m68k_get_reg(NULL, M68K_REG_D5), m68k_get_reg(NULL, M68K_REG_D6), m68k_get_reg(NULL, M68K_REG_D7));
353 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
359 if (cpu_emulation_running)
360 m68k_execute(loop_cycles);
365 last_irq = ((read_reg() & 0xe000) >> 13);
366 if (last_irq != last_last_irq) {
367 last_last_irq = last_irq;
368 M68K_SET_IRQ(last_irq);
372 if (gayleirq && int2_enabled) {
373 write16(0xdff09c, 0x8000 | (1 << 3) && last_irq != 2);
374 last_last_irq = last_irq;
384 last_last_irq = last_irq;
389 while (get_key_char(&c, &c_code, &c_type)) {
390 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
392 printf("Keyboard hook enabled.\n");
394 else if (kb_hook_enabled) {
395 if (c == 0x1B && c_type) {
397 printf("Keyboard hook disabled.\n");
400 /*printf("Key code: %.2X - ", c_code);
403 printf("released.\n");
406 printf("pressed.\n");
412 printf("unknown.\n");
415 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
422 // pause pressed; trigger nmi (int level 7)
423 if (c == 0x01 && c_type) {
424 printf("[INT] Sending NMI\n");
429 if (!kb_hook_enabled && c_type) {
430 if (c && c == cfg->mouse_toggle_key) {
431 mouse_hook_enabled ^= 1;
432 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
433 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
436 cpu_emulation_running ^= 1;
437 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
440 realtime_graphics_debug ^= 1;
441 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
445 //m68k_pulse_reset();
446 printf("CPU emulation reset.\n");
449 printf("Quitting and exiting emulator.\n");
450 goto stop_cpu_emulation;
453 realtime_disassembly ^= 1;
455 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
458 int r = get_mapped_item_by_address(cfg, 0x08000000);
460 printf("Dumping first 16MB of mapped range %d.\n", r);
461 FILE *dmp = fopen("./memdmp.bin", "wb+");
462 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
466 if (c == 's' && realtime_disassembly) {
469 if (c == 'S' && realtime_disassembly) {
475 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
476 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
477 switch (mouse_extra) {
480 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
484 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
488 // dampen the scroll wheel until next while loop iteration
503 void cpu_pulse_reset(void) {
506 // printf("Status Reg%x\n",read_reg());
509 // printf("Status Reg%x\n",read_reg());
510 if (cfg->platform->handle_reset)
511 cfg->platform->handle_reset(cfg);
514 m68k_write_memory_16(INTENA, 0x7FFF);
516 m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
517 m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
522 int cpu_irq_ack(int level) {
523 printf("cpu irq ack\n");
527 static unsigned int target = 0;
528 static uint8_t send_keypress = 0;
530 uint8_t cdtv_dmac_reg_idx_read();
531 void cdtv_dmac_reg_idx_write(uint8_t value);
532 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
533 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
535 #define PLATFORM_CHECK_READ(a) \
536 if (address >= cfg->custom_low && address < cfg->custom_high) { \
537 unsigned int target = 0; \
538 switch(cfg->platform->id) { \
539 case PLATFORM_AMIGA: { \
540 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
541 return handle_piscsi_read(address, a); \
543 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
544 return handle_pinet_read(address, a); \
546 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
547 return rtg_read((address & 0x0FFFFFFF), a); \
549 if (custom_read_amiga(cfg, address, &target, a) != -1) { \
558 if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
559 if (handle_mapped_read(cfg, address, &target, a) != -1) \
563 unsigned int m68k_read_memory_8(unsigned int address) {
564 PLATFORM_CHECK_READ(OP_TYPE_BYTE);
566 /*if (address >= 0xE90000 && address < 0xF00000) {
567 printf("BYTE read from DMAC @%.8X:", address);
568 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_BYTE);
571 cpu_emulation_running = 0;
575 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
576 stop_cpu_emulation(1);
580 if (address & 0xFF000000)
583 unsigned char result = (unsigned int)read8((uint32_t)address);
585 if (mouse_hook_enabled) {
586 if (address == CIAAPRA) {
587 if (mouse_buttons & 0x01) {
588 //mouse_buttons -= 1;
589 return (unsigned int)(result ^ 0x40);
592 return (unsigned int)result;
596 if (kb_hook_enabled) {
597 if (address == CIAAICR) {
598 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
603 if (send_keypress == 2) {
609 if (address == CIAADAT) {
610 //if (send_keypress) {
611 uint8_t c = 0, t = 0;
612 pop_queued_key(&c, &t);
614 result = ((c << 1) | t) ^ 0xFF;
625 unsigned int m68k_read_memory_16(unsigned int address) {
626 PLATFORM_CHECK_READ(OP_TYPE_WORD);
628 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
629 stop_cpu_emulation(1);
632 /*if (address >= 0xE90000 && address < 0xF00000) {
633 printf("WORD read from DMAC @%.8X:", address);
634 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_WORD);
637 cpu_emulation_running = 0;
641 if (mouse_hook_enabled) {
642 if (address == JOY0DAT) {
643 // Forward mouse valueses to Amyga.
644 unsigned short result = (mouse_dy << 8) | (mouse_dx);
645 return (unsigned int)result;
647 /*if (address == CIAAPRA) {
648 unsigned short result = (unsigned int)read16((uint32_t)address);
649 if (mouse_buttons & 0x01) {
650 return (unsigned int)(result | 0x40);
653 return (unsigned int)result;
655 if (address == POTGOR) {
656 unsigned short result = (unsigned int)read16((uint32_t)address);
657 // bit 1 rmb, bit 2 mmb
658 if (mouse_buttons & 0x06) {
659 return (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
660 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
662 return (unsigned int)(result & 0xfffd);
666 if (address & 0xFF000000)
669 if (address & 0x01) {
670 return ((read8(address) << 8) | read8(address + 1));
672 return (unsigned int)read16((uint32_t)address);
675 unsigned int m68k_read_memory_32(unsigned int address) {
676 PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
678 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
679 stop_cpu_emulation(1);
682 /*if (address >= 0xE90000 && address < 0xF00000) {
683 printf("LONGWORD read from DMAC @%.8X:", address);
684 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_LONGWORD);
687 cpu_emulation_running = 0;
691 if (address & 0xFF000000)
694 if (address & 0x01) {
695 uint32_t c = read8(address);
696 c |= (be16toh(read16(address+1)) << 8);
697 c |= (read8(address + 3) << 24);
700 uint16_t a = read16(address);
701 uint16_t b = read16(address + 2);
702 return (a << 16) | b;
705 #define PLATFORM_CHECK_WRITE(a) \
706 if (address >= cfg->custom_low && address < cfg->custom_high) { \
707 switch(cfg->platform->id) { \
708 case PLATFORM_AMIGA: { \
709 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
710 handle_piscsi_write(address, value, a); \
712 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
713 handle_pinet_write(address, value, a); \
715 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
716 rtg_write((address & 0x0FFFFFFF), value, a); \
719 if (custom_write_amiga(cfg, address, value, a) != -1) { \
728 if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
729 if (handle_mapped_write(cfg, address, value, a) != -1) \
733 void m68k_write_memory_8(unsigned int address, unsigned int value) {
734 PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
736 /*if (address >= 0xE90000 && address < 0xF00000) {
737 printf("BYTE write to DMAC @%.8X: %.2X\n", address, value);
738 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_BYTE);
740 cpu_emulation_running = 0;
744 if (address == 0xbfe001) {
745 if (ovl != (value & (1 << 0))) {
746 ovl = (value & (1 << 0));
747 printf("OVL:%x\n", ovl);
751 if (address & 0xFF000000)
754 write8((uint32_t)address, value);
758 void m68k_write_memory_16(unsigned int address, unsigned int value) {
759 PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
761 /*if (address >= 0xE90000 && address < 0xF00000) {
762 printf("WORD write to DMAC @%.8X: %.4X\n", address, value);
763 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_WORD);
765 cpu_emulation_running = 0;
769 if (address == 0xDFF030) {
770 char *serdat = (char *)&value;
771 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
772 // ignore this upper byte as it's not viewable data, only display lower byte.
773 printf("%c", serdat[0]);
775 if (address == 0xDFF09A) {
776 if (!(value & 0x8000)) {
781 else if (value & 0x04) {
786 if (address & 0xFF000000)
790 printf("Unaligned WORD write!\n");
792 write16((uint32_t)address, value);
796 void m68k_write_memory_32(unsigned int address, unsigned int value) {
797 PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
799 /*if (address >= 0xE90000 && address < 0xF00000) {
800 printf("LONGWORD write to DMAC @%.8X: %.8X\n", address, value);
801 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_LONGWORD);
803 cpu_emulation_running = 0;
807 if (address & 0xFF000000)
811 printf("Unaligned LONGWORD write!\n");
813 write16(address, value >> 16);
814 write16(address + 2, value);