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"
29 #include <sys/ioctl.h>
32 #include <sys/types.h>
35 #define KEY_POLL_INTERVAL_MSEC 5000
37 unsigned char read_ranges;
38 unsigned int read_addr[8];
39 unsigned int read_upper[8];
40 unsigned char *read_data[8];
41 unsigned char write_ranges;
42 unsigned int write_addr[8];
43 unsigned int write_upper[8];
44 unsigned char *write_data[8];
46 int kb_hook_enabled = 0;
47 int mouse_hook_enabled = 0;
48 int cpu_emulation_running = 1;
50 uint8_t mouse_dx = 0, mouse_dy = 0;
51 uint8_t mouse_buttons = 0;
52 uint8_t mouse_extra = 0;
54 extern uint8_t gayle_int;
55 extern uint8_t gayle_ide_enabled;
56 extern uint8_t gayle_emulation_enabled;
57 extern uint8_t gayle_a4k_int;
58 extern volatile unsigned int *gpio;
59 extern volatile uint16_t srdata;
60 extern uint8_t realtime_graphics_debug;
61 uint8_t realtime_disassembly, int2_enabled = 0;
62 uint32_t do_disasm = 0, old_level;
63 char c = 0, c_code = 0, c_type = 0; // @todo temporary main/cpu_task scope workaround until input moved to a thread
64 uint32_t last_irq = 8, last_last_irq = 8;
66 char disasm_buf[4096];
68 #define KICKBASE 0xF80000
69 #define KICKSIZE 0x7FFFF
71 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
80 extern m68ki_cpu_core m68ki_cpu;
81 extern int m68ki_initial_cycles;
82 extern int m68ki_remaining_cycles;
84 #define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \
85 CPU_INT_LEVEL = (i << 8); \
86 if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \
87 m68ki_cpu.nmi_pending = TRUE;
88 #define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \
91 #define M68K_SET_IRQ m68k_set_irq
92 #define M68K_END_TIMESLICE m68k_end_timeslice()
95 #define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop");
97 #define DEBUG_EMULATOR
104 // Configurable emulator options
105 unsigned int cpu_type = M68K_CPU_TYPE_68000;
106 unsigned int loop_cycles = 300, irq_status = 0;
107 struct emulator_config *cfg = NULL;
108 char keyboard_file[256] = "/dev/input/event1";
110 uint64_t trig_irq = 0, serv_irq = 0;
111 uint16_t irq_delay = 0;
113 void *ipl_task(void *args) {
114 printf("IPL thread running\n");
115 uint16_t old_irq = 0;
119 value = *(gpio + 13);
121 if (!(value & (1 << PIN_IPL_ZERO))) {
143 /*if (gayle_ide_enabled) {
144 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
145 //get_ide(0)->drive[0].intrq = 0;
154 NOP NOP NOP NOP NOP NOP NOP NOP
155 //NOP NOP NOP NOP NOP NOP NOP NOP
156 //NOP NOP NOP NOP NOP NOP NOP NOP
157 /*NOP NOP NOP NOP NOP NOP NOP NOP
158 NOP NOP NOP NOP NOP NOP NOP NOP
159 NOP NOP NOP NOP NOP NOP NOP NOP*/
168 if (mouse_hook_enabled) {
169 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
172 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
173 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
174 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), \
175 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));
176 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), \
177 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));
178 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
184 if (cpu_emulation_running)
185 m68k_execute(loop_cycles);
190 last_irq = ((read_reg() & 0xe000) >> 13);
191 if (last_irq != last_last_irq) {
192 last_last_irq = last_irq;
193 M68K_SET_IRQ(last_irq);
197 if (gayleirq && int2_enabled) {
198 write16(0xdff09c, 0x8000 | (1 << 3) && last_irq != 2);
199 last_last_irq = last_irq;
210 last_last_irq = last_irq;
215 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
216 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
217 switch (mouse_extra) {
220 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
224 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
228 // dampen the scroll wheel until next while loop iteration
234 printf("[CPU] End of CPU thread\n");
237 void *keyboard_task() {
238 struct pollfd kbdfd[1];
241 printf("[KBD] Keyboard thread started\n");
243 kbdfd[0].fd = keyboard_fd;
244 kbdfd[0].events = POLLIN;
247 kpoll = poll(kbdfd, 1, KEY_POLL_INTERVAL_MSEC);
248 if ((kpoll > 0) && (kbdfd[0].revents & POLLHUP)) {
249 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
250 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
251 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
255 // if kpoll > 0 then it contains number of events to pull, also check if POLLIN is set in revents
256 if ((kpoll <= 0) || !(kbdfd[0].revents & POLLIN)) {
260 while (get_key_char(&c, &c_code, &c_type)) {
261 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
263 printf("Keyboard hook enabled.\n");
265 else if (kb_hook_enabled) {
266 if (c == 0x1B && c_type) {
268 printf("Keyboard hook disabled.\n");
271 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
278 // pause pressed; trigger nmi (int level 7)
279 if (c == 0x01 && c_type) {
280 printf("[INT] Sending NMI\n");
284 if (!kb_hook_enabled && c_type) {
285 if (c && c == cfg->mouse_toggle_key) {
286 mouse_hook_enabled ^= 1;
287 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
288 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
291 cpu_emulation_running ^= 1;
292 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
295 realtime_graphics_debug ^= 1;
296 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
300 //m68k_pulse_reset();
301 printf("CPU emulation reset.\n");
303 // @todo work out how to signal the main process that we want to quit
305 // printf("Quitting and exiting emulator.\n");
306 // goto stop_cpu_emulation;
309 realtime_disassembly ^= 1;
311 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
314 int r = get_mapped_item_by_address(cfg, 0x08000000);
316 printf("Dumping first 16MB of mapped range %d.\n", r);
317 FILE *dmp = fopen("./memdmp.bin", "wb+");
318 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
322 if (c == 's' && realtime_disassembly) {
325 if (c == 'S' && realtime_disassembly) {
334 printf("[KBD] Keyboard thread ending\n");
337 void stop_cpu_emulation(uint8_t disasm_cur) {
340 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
341 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), \
342 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));
343 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), \
344 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));
345 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
346 realtime_disassembly = 1;
349 cpu_emulation_running = 0;
354 static volatile unsigned char maprom;
356 void sigint_handler(int sig_num) {
358 //cpu_emulation_running = 0;
361 printf("Received sigint %d, exiting.\n", sig_num);
367 if (cfg->platform->shutdown) {
368 cfg->platform->shutdown(cfg);
371 printf("IRQs triggered: %lld\n", trig_irq);
372 printf("IRQs serviced: %lld\n", serv_irq);
377 int main(int argc, char *argv[]) {
379 //const struct sched_param priority = {99};
382 irq_delay = atoi(argv[1]);
383 printf("Setting IRQ delay to %d loops (%s).\n", irq_delay, argv[1]);
386 // Some command line switch stuffles
387 for (g = 1; g < argc; g++) {
388 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
390 printf("%s switch found, but no CPU type specified.\n", argv[g]);
393 cpu_type = get_m68k_cpu_type(argv[g]);
396 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
398 printf("%s switch found, but no config filename specified.\n", argv[g]);
401 cfg = load_config_file(argv[g]);
404 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
406 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
409 strcpy(keyboard_file, argv[g]);
415 printf("No config file specified. Trying to load default.cfg...\n");
416 cfg = load_config_file("default.cfg");
418 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
419 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
421 printf("Failed to allocate memory for emulator config!\n");
424 memset(cfg, 0x00, sizeof(struct emulator_config));
429 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
430 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
433 cfg->platform = make_platform_config("none", "generic");
434 cfg->platform->platform_initial_setup(cfg);
437 if (cfg->mouse_enabled) {
438 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
439 if (mouse_fd == -1) {
440 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
441 cfg->mouse_enabled = 0;
444 * *-*-*-* magic numbers! *-*-*-*
445 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
446 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
447 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
448 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
449 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
451 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
452 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
453 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
454 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
455 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
457 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
461 if (cfg->keyboard_file)
462 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
464 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
466 if (keyboard_fd == -1) {
467 printf("Failed to open keyboard event source.\n");
472 signal(SIGINT, sigint_handler);
475 //goto skip_everything;
477 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
479 printf("Enable 200MHz GPCLK0 on GPIO4\n");
480 gpio_enable_200mhz();
482 // reset cpld statemachine first
490 // reset amiga and statemachine
496 printf("Setting CPU type to %d.\n", cpu_type);
497 m68k_set_cpu_type(cpu_type);
501 m68k_set_reg(M68K_REG_PC, 0xF80002);
503 m68k_set_reg(M68K_REG_PC, 0x0);
506 ps_reset_state_machine();
511 printf("Setting CPU type to %d.\n", cpu_type);
512 m68k_set_cpu_type(cpu_type);
515 pthread_t ipl_tid, cpu_tid, kbd_tid;
517 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
519 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
521 pthread_setname_np(ipl_tid, "pistorm: ipl");
522 printf("IPL thread created successfully\n");
525 // create keyboard task
526 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
528 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
530 pthread_setname_np(kbd_tid, "pistorm: kbd");
531 printf("[MAIN] Keyboard thread created successfully\n");
535 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
537 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
539 pthread_setname_np(cpu_tid, "pistorm: cpu");
540 printf("[MAIN] CPU thread created successfully\n");
543 // wait for cpu task to end before closing up and finishing
544 pthread_join(cpu_tid, NULL);
545 printf("[MAIN] All threads appear to have concluded; ending process\n");
555 void cpu_pulse_reset(void) {
558 // printf("Status Reg%x\n",read_reg());
561 // printf("Status Reg%x\n",read_reg());
562 if (cfg->platform->handle_reset)
563 cfg->platform->handle_reset(cfg);
565 //m68k_write_memory_16(INTENA, 0x7FFF);
567 m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
568 m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
573 int cpu_irq_ack(int level) {
574 printf("cpu irq ack\n");
578 static unsigned int target = 0;
579 static uint8_t send_keypress = 0;
581 uint8_t cdtv_dmac_reg_idx_read();
582 void cdtv_dmac_reg_idx_write(uint8_t value);
583 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
584 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
586 #define PLATFORM_CHECK_READ(a) \
587 if (address >= cfg->custom_low && address < cfg->custom_high) { \
588 unsigned int target = 0; \
589 switch(cfg->platform->id) { \
590 case PLATFORM_AMIGA: { \
591 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
592 return handle_piscsi_read(address, a); \
594 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
595 return handle_pinet_read(address, a); \
597 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
598 return rtg_read((address & 0x0FFFFFFF), a); \
600 if (custom_read_amiga(cfg, address, &target, a) != -1) { \
609 if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
610 if (handle_mapped_read(cfg, address, &target, a) != -1) \
614 unsigned int m68k_read_memory_8(unsigned int address) {
615 PLATFORM_CHECK_READ(OP_TYPE_BYTE);
617 /*if (address >= 0xE90000 && address < 0xF00000) {
618 printf("BYTE read from DMAC @%.8X:", address);
619 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_BYTE);
622 cpu_emulation_running = 0;
626 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
627 stop_cpu_emulation(1);
631 if (address & 0xFF000000)
634 unsigned char result = (unsigned int)read8((uint32_t)address);
636 if (mouse_hook_enabled) {
637 if (address == CIAAPRA) {
638 if (mouse_buttons & 0x01) {
639 //mouse_buttons -= 1;
640 return (unsigned int)(result ^ 0x40);
643 return (unsigned int)result;
647 if (kb_hook_enabled) {
648 if (address == CIAAICR) {
649 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
654 if (send_keypress == 2) {
660 if (address == CIAADAT) {
661 //if (send_keypress) {
662 uint8_t c = 0, t = 0;
663 pop_queued_key(&c, &t);
665 result = ((c << 1) | t) ^ 0xFF;
676 unsigned int m68k_read_memory_16(unsigned int address) {
677 PLATFORM_CHECK_READ(OP_TYPE_WORD);
679 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
680 stop_cpu_emulation(1);
683 /*if (address >= 0xE90000 && address < 0xF00000) {
684 printf("WORD read from DMAC @%.8X:", address);
685 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_WORD);
688 cpu_emulation_running = 0;
692 if (mouse_hook_enabled) {
693 if (address == JOY0DAT) {
694 // Forward mouse valueses to Amyga.
695 unsigned short result = (mouse_dy << 8) | (mouse_dx);
696 return (unsigned int)result;
698 /*if (address == CIAAPRA) {
699 unsigned short result = (unsigned int)read16((uint32_t)address);
700 if (mouse_buttons & 0x01) {
701 return (unsigned int)(result | 0x40);
704 return (unsigned int)result;
706 if (address == POTGOR) {
707 unsigned short result = (unsigned int)read16((uint32_t)address);
708 // bit 1 rmb, bit 2 mmb
709 if (mouse_buttons & 0x06) {
710 return (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
711 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
713 return (unsigned int)(result & 0xfffd);
717 if (address & 0xFF000000)
720 if (address & 0x01) {
721 return ((read8(address) << 8) | read8(address + 1));
723 return (unsigned int)read16((uint32_t)address);
726 unsigned int m68k_read_memory_32(unsigned int address) {
727 PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
729 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
730 stop_cpu_emulation(1);
733 /*if (address >= 0xE90000 && address < 0xF00000) {
734 printf("LONGWORD read from DMAC @%.8X:", address);
735 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_LONGWORD);
738 cpu_emulation_running = 0;
742 if (address & 0xFF000000)
745 if (address & 0x01) {
746 uint32_t c = read8(address);
747 c |= (be16toh(read16(address+1)) << 8);
748 c |= (read8(address + 3) << 24);
751 uint16_t a = read16(address);
752 uint16_t b = read16(address + 2);
753 return (a << 16) | b;
756 #define PLATFORM_CHECK_WRITE(a) \
757 if (address >= cfg->custom_low && address < cfg->custom_high) { \
758 switch(cfg->platform->id) { \
759 case PLATFORM_AMIGA: { \
760 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
761 handle_piscsi_write(address, value, a); \
763 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
764 handle_pinet_write(address, value, a); \
766 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
767 rtg_write((address & 0x0FFFFFFF), value, a); \
770 if (custom_write_amiga(cfg, address, value, a) != -1) { \
779 if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
780 if (handle_mapped_write(cfg, address, value, a) != -1) \
784 void m68k_write_memory_8(unsigned int address, unsigned int value) {
785 PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
787 /*if (address >= 0xE90000 && address < 0xF00000) {
788 printf("BYTE write to DMAC @%.8X: %.2X\n", address, value);
789 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_BYTE);
791 cpu_emulation_running = 0;
795 if (address == 0xbfe001) {
796 if (ovl != (value & (1 << 0))) {
797 ovl = (value & (1 << 0));
798 printf("OVL:%x\n", ovl);
802 if (address & 0xFF000000)
805 write8((uint32_t)address, value);
809 void m68k_write_memory_16(unsigned int address, unsigned int value) {
810 PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
812 /*if (address >= 0xE90000 && address < 0xF00000) {
813 printf("WORD write to DMAC @%.8X: %.4X\n", address, value);
814 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_WORD);
816 cpu_emulation_running = 0;
820 if (address == 0xDFF030) {
821 char *serdat = (char *)&value;
822 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
823 // ignore this upper byte as it's not viewable data, only display lower byte.
824 printf("%c", serdat[0]);
826 if (address == 0xDFF09A) {
827 if (!(value & 0x8000)) {
832 else if (value & 0x04) {
837 if (address & 0xFF000000)
841 printf("Unaligned WORD write!\n");
843 write16((uint32_t)address, value);
847 void m68k_write_memory_32(unsigned int address, unsigned int value) {
848 PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
850 /*if (address >= 0xE90000 && address < 0xF00000) {
851 printf("LONGWORD write to DMAC @%.8X: %.8X\n", address, value);
852 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_LONGWORD);
854 cpu_emulation_running = 0;
858 if (address & 0xFF000000)
862 printf("Unaligned LONGWORD write!\n");
864 write16(address, value >> 16);
865 write16(address + 2, value);