1 // SPDX-License-Identifier: MIT
5 #include "platforms/platforms.h"
6 #include "input/input.h"
8 #include "platforms/amiga/Gayle.h"
9 #include "platforms/amiga/amiga-registers.h"
10 #include "platforms/amiga/rtg/rtg.h"
11 #include "platforms/amiga/hunk-reloc.h"
12 #include "platforms/amiga/piscsi/piscsi.h"
13 #include "platforms/amiga/piscsi/piscsi-enums.h"
14 #include "platforms/amiga/net/pi-net.h"
15 #include "platforms/amiga/net/pi-net-enums.h"
16 #include "platforms/amiga/pistorm-dev/pistorm-dev.h"
17 #include "platforms/amiga/pistorm-dev/pistorm-dev-enums.h"
18 #include "gpio/ps_protocol.h"
32 #include <sys/ioctl.h>
35 #include <sys/types.h>
38 #define KEY_POLL_INTERVAL_MSEC 5000
40 unsigned char read_ranges;
41 unsigned int read_addr[8];
42 unsigned int read_upper[8];
43 unsigned char *read_data[8];
44 unsigned char write_ranges;
45 unsigned int write_addr[8];
46 unsigned int write_upper[8];
47 unsigned char *write_data[8];
49 int kb_hook_enabled = 0;
50 int mouse_hook_enabled = 0;
51 int cpu_emulation_running = 1;
53 uint8_t mouse_dx = 0, mouse_dy = 0;
54 uint8_t mouse_buttons = 0;
55 uint8_t mouse_extra = 0;
57 extern uint8_t gayle_int;
58 extern uint8_t gayle_ide_enabled;
59 extern uint8_t gayle_emulation_enabled;
60 extern uint8_t gayle_a4k_int;
61 extern volatile unsigned int *gpio;
62 extern volatile uint16_t srdata;
63 extern uint8_t realtime_graphics_debug, emulator_exiting;
64 extern uint8_t rtg_on;
65 uint8_t realtime_disassembly, int2_enabled = 0;
66 uint32_t do_disasm = 0, old_level;
67 uint32_t last_irq = 8, last_last_irq = 8;
69 uint8_t end_signal = 0, load_new_config = 0;
71 char disasm_buf[4096];
73 #define KICKBASE 0xF80000
74 #define KICKSIZE 0x7FFFF
76 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
85 extern m68ki_cpu_core m68ki_cpu;
86 extern int m68ki_initial_cycles;
87 extern int m68ki_remaining_cycles;
89 #define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \
90 CPU_INT_LEVEL = (i << 8); \
91 if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \
92 m68ki_cpu.nmi_pending = TRUE;
93 #define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \
96 #define M68K_SET_IRQ m68k_set_irq
97 #define M68K_END_TIMESLICE m68k_end_timeslice()
100 #define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop");
102 #define DEBUG_EMULATOR
103 #ifdef DEBUG_EMULATOR
109 // Configurable emulator options
110 unsigned int cpu_type = M68K_CPU_TYPE_68000;
111 unsigned int loop_cycles = 300, irq_status = 0;
112 struct emulator_config *cfg = NULL;
113 char keyboard_file[256] = "/dev/input/event1";
115 uint64_t trig_irq = 0, serv_irq = 0;
116 uint16_t irq_delay = 0;
117 unsigned int amiga_reset=0, amiga_reset_last=0;
118 unsigned int do_reset=0;
120 void *ipl_task(void *args) {
121 printf("IPL thread running\n");
122 uint16_t old_irq = 0;
126 value = *(gpio + 13);
128 if (!(value & (1 << PIN_IPL_ZERO))) {
153 amiga_reset=(value & (1 << PIN_RESET));
154 if(amiga_reset!=amiga_reset_last)
156 amiga_reset_last=amiga_reset;
159 printf("Amiga Reset is down...\n");
165 printf("Amiga Reset is up...\n");
170 /*if (gayle_ide_enabled) {
171 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
172 //get_ide(0)->drive[0].intrq = 0;
181 NOP NOP NOP NOP NOP NOP NOP NOP
182 //NOP NOP NOP NOP NOP NOP NOP NOP
183 //NOP NOP NOP NOP NOP NOP NOP NOP
184 /*NOP NOP NOP NOP NOP NOP NOP NOP
185 NOP NOP NOP NOP NOP NOP NOP NOP
186 NOP NOP NOP NOP NOP NOP NOP NOP*/
195 if (mouse_hook_enabled) {
196 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
199 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
200 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
201 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), \
202 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));
203 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), \
204 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));
205 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
211 if (cpu_emulation_running)
212 m68k_execute(loop_cycles);
217 last_irq = ((read_reg() & 0xe000) >> 13);
218 if (last_irq != last_last_irq) {
219 last_last_irq = last_irq;
220 M68K_SET_IRQ(last_irq);
224 if (gayleirq && int2_enabled) {
225 write16(0xdff09c, 0x8000 | (1 << 3) && last_irq != 2);
226 last_last_irq = last_irq;
237 last_last_irq = last_irq;
244 usleep(1000000); // 1sec
246 // while(amiga_reset==0);
247 // printf("CPU emulation reset.\n");
250 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
251 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
252 switch (mouse_extra) {
255 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
259 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
263 // dampen the scroll wheel until next while loop iteration
267 if (load_new_config) {
268 printf("[CPU] Loading new config file.\n");
269 goto stop_cpu_emulation;
273 goto stop_cpu_emulation;
278 printf("[CPU] End of CPU thread\n");
282 void *keyboard_task() {
283 struct pollfd kbdpoll[1];
285 char c = 0, c_code = 0, c_type = 0;
286 char grab_message[] = "[KBD] Grabbing keyboard from input layer\n",
287 ungrab_message[] = "[KBD] Ungrabbing keyboard\n";
289 printf("[KBD] Keyboard thread started\n");
291 // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it
292 if (kb_hook_enabled && cfg->keyboard_grab) {
293 printf(grab_message);
294 grab_device(keyboard_fd);
297 kbdpoll[0].fd = keyboard_fd;
298 kbdpoll[0].events = POLLIN;
301 kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC);
302 if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) {
303 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
304 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
305 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
309 // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents
310 if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) {
314 while (get_key_char(&c, &c_code, &c_type)) {
315 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
317 printf("[KBD] Keyboard hook enabled.\n");
318 if (cfg->keyboard_grab) {
319 grab_device(keyboard_fd);
320 printf(grab_message);
322 } else if (kb_hook_enabled) {
323 if (c == 0x1B && c_type) {
325 printf("[KBD] Keyboard hook disabled.\n");
326 if (cfg->keyboard_grab) {
327 release_device(keyboard_fd);
328 printf(ungrab_message);
331 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
338 // pause pressed; trigger nmi (int level 7)
339 if (c == 0x01 && c_type) {
340 printf("[INT] Sending NMI\n");
344 if (!kb_hook_enabled && c_type) {
345 if (c && c == cfg->mouse_toggle_key) {
346 mouse_hook_enabled ^= 1;
347 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
348 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
351 cpu_emulation_running ^= 1;
352 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
355 realtime_graphics_debug ^= 1;
356 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
360 //m68k_pulse_reset();
361 printf("CPU emulation reset.\n");
364 printf("Quitting and exiting emulator.\n");
369 realtime_disassembly ^= 1;
371 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
374 int r = get_mapped_item_by_address(cfg, 0x08000000);
376 printf("Dumping first 16MB of mapped range %d.\n", r);
377 FILE *dmp = fopen("./memdmp.bin", "wb+");
378 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
382 if (c == 's' && realtime_disassembly) {
385 if (c == 'S' && realtime_disassembly) {
394 printf("[KBD] Keyboard thread ending\n");
395 if (cfg->keyboard_grab) {
396 printf(ungrab_message);
397 release_device(keyboard_fd);
402 void stop_cpu_emulation(uint8_t disasm_cur) {
405 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
406 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), \
407 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));
408 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), \
409 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));
410 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
411 realtime_disassembly = 1;
414 cpu_emulation_running = 0;
419 static volatile unsigned char maprom;
421 void sigint_handler(int sig_num) {
423 //cpu_emulation_running = 0;
426 printf("Received sigint %d, exiting.\n", sig_num);
432 if (cfg->platform->shutdown) {
433 cfg->platform->shutdown(cfg);
436 while (!emulator_exiting) {
437 emulator_exiting = 1;
441 printf("IRQs triggered: %lld\n", trig_irq);
442 printf("IRQs serviced: %lld\n", serv_irq);
447 int main(int argc, char *argv[]) {
452 //const struct sched_param priority = {99};
454 // Some command line switch stuffles
455 for (g = 1; g < argc; g++) {
456 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
458 printf("%s switch found, but no CPU type specified.\n", argv[g]);
461 cpu_type = get_m68k_cpu_type(argv[g]);
464 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
466 printf("%s switch found, but no config filename specified.\n", argv[g]);
469 FILE *chk = fopen(argv[g], "rb");
471 printf("Config file %s does not exist, please check that you've specified the path correctly.\n", argv[g]);
475 set_pistorm_devcfg_filename(argv[g]);
479 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
481 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
484 strcpy(keyboard_file, argv[g]);
492 ps_reset_state_machine();
496 if (load_new_config != 0) {
497 uint8_t config_action = load_new_config - 1;
500 free_config_file(cfg);
505 switch(config_action) {
508 cfg = load_config_file(get_pistorm_devcfg_filename());
511 cfg = load_config_file("default.cfg");
517 printf("No config file specified. Trying to load default.cfg...\n");
518 cfg = load_config_file("default.cfg");
520 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
521 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
523 printf("Failed to allocate memory for emulator config!\n");
526 memset(cfg, 0x00, sizeof(struct emulator_config));
531 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
532 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
535 cfg->platform = make_platform_config("none", "generic");
536 cfg->platform->platform_initial_setup(cfg);
539 if (cfg->mouse_enabled) {
540 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
541 if (mouse_fd == -1) {
542 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
543 cfg->mouse_enabled = 0;
546 * *-*-*-* magic numbers! *-*-*-*
547 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
548 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
549 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
550 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
551 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
553 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
554 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
555 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
556 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
557 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
559 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
563 if (cfg->keyboard_file)
564 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
566 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
568 if (keyboard_fd == -1) {
569 printf("Failed to open keyboard event source.\n");
572 if (cfg->mouse_autoconnect)
573 mouse_hook_enabled = 1;
575 if (cfg->keyboard_autoconnect)
580 signal(SIGINT, sigint_handler);
582 ps_reset_state_machine();
587 printf("Setting CPU type to %d.\n", cpu_type);
588 m68k_set_cpu_type(cpu_type);
591 pthread_t ipl_tid = 0, cpu_tid, kbd_tid;
594 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
596 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
598 pthread_setname_np(ipl_tid, "pistorm: ipl");
599 printf("IPL thread created successfully\n");
603 // create keyboard task
604 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
606 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
608 pthread_setname_np(kbd_tid, "pistorm: kbd");
609 printf("[MAIN] Keyboard thread created successfully\n");
613 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
615 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
617 pthread_setname_np(cpu_tid, "pistorm: cpu");
618 printf("[MAIN] CPU thread created successfully\n");
621 // wait for cpu task to end before closing up and finishing
622 pthread_join(cpu_tid, NULL);
624 while (!emulator_exiting) {
625 emulator_exiting = 1;
629 if (load_new_config == 0)
630 printf("[MAIN] All threads appear to have concluded; ending process\n");
637 if (load_new_config != 0)
640 if (cfg->platform->shutdown) {
641 cfg->platform->shutdown(cfg);
647 void cpu_pulse_reset(void) {
649 if (cfg->platform->handle_reset)
650 cfg->platform->handle_reset(cfg);
652 //m68k_write_memory_16(INTENA, 0x7FFF);
654 //m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
655 //m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
660 int cpu_irq_ack(int level) {
661 printf("cpu irq ack\n");
665 static unsigned int target = 0;
666 static uint8_t send_keypress = 0;
667 static uint32_t platform_res, rres;
669 uint8_t cdtv_dmac_reg_idx_read();
670 void cdtv_dmac_reg_idx_write(uint8_t value);
671 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
672 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
674 static inline uint32_t ps_read(uint8_t type, uint32_t addr) {
677 return ps_read_8(addr);
679 return ps_read_16(addr);
680 case OP_TYPE_LONGWORD:
681 return ps_read_32(addr);
683 // This shouldn't actually happen.
687 static inline int32_t platform_read_check(uint8_t type, uint32_t addr, uint32_t *res) {
690 if (mouse_hook_enabled && (mouse_buttons & 0x01)) {
691 rres = (uint32_t)ps_read(type, addr);
692 *res = (rres ^ 0x40);
698 if (kb_hook_enabled) {
699 rres = (uint32_t)ps_read(type, addr);
700 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
705 if (send_keypress == 2) {
714 if (kb_hook_enabled) {
715 rres = (uint32_t)ps_read(type, addr);
716 uint8_t c = 0, t = 0;
717 pop_queued_key(&c, &t);
719 rres = ((c << 1) | t) ^ 0xFF;
727 if (mouse_hook_enabled) {
728 unsigned short result = (mouse_dy << 8) | (mouse_dx);
729 *res = (unsigned int)result;
735 if (mouse_hook_enabled) {
736 unsigned short result = (unsigned short)ps_read(type, addr);
737 // bit 1 rmb, bit 2 mmb
738 if (mouse_buttons & 0x06) {
739 *res = (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
740 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
743 *res = (unsigned int)(result & 0xfffd);
752 switch (cfg->platform->id) {
754 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
755 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
756 *res = handle_piscsi_read(addr, type);
759 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
760 *res = handle_pinet_read(addr, type);
763 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
764 *res = rtg_read((addr & 0x0FFFFFFF), type);
767 if (custom_read_amiga(cfg, addr, &target, type) != -1) {
777 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
778 if (handle_mapped_read(cfg, addr, &target, type) != -1) {
787 unsigned int m68k_read_memory_8(unsigned int address) {
788 if (platform_read_check(OP_TYPE_BYTE, address, &platform_res)) {
792 if (address & 0xFF000000)
795 return (unsigned int)read8((uint32_t)address);
798 unsigned int m68k_read_memory_16(unsigned int address) {
799 if (platform_read_check(OP_TYPE_WORD, address, &platform_res)) {
803 if (address & 0xFF000000)
806 if (address & 0x01) {
807 return ((read8(address) << 8) | read8(address + 1));
809 return (unsigned int)read16((uint32_t)address);
812 unsigned int m68k_read_memory_32(unsigned int address) {
813 if (platform_read_check(OP_TYPE_LONGWORD, address, &platform_res)) {
817 if (address & 0xFF000000)
820 if (address & 0x01) {
821 uint32_t c = read8(address);
822 c |= (be16toh(read16(address+1)) << 8);
823 c |= (read8(address + 3) << 24);
826 uint16_t a = read16(address);
827 uint16_t b = read16(address + 2);
828 return (a << 16) | b;
831 static inline int32_t platform_write_check(uint8_t type, uint32_t addr, uint32_t val) {
834 if (ovl != (val & (1 << 0))) {
835 ovl = (val & (1 << 0));
836 printf("OVL:%x\n", ovl);
841 char *serdat = (char *)&val;
842 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
843 // ignore this upper byte as it's not viewable data, only display lower byte.
844 printf("%c", serdat[0]);
849 // This code is kind of strange and should probably be reworked/revoked.
850 if (!(val & 0x8000)) {
855 else if (val & 0x04) {
864 switch (cfg->platform->id) {
866 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
867 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
868 handle_piscsi_write(addr, val, type);
871 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
872 handle_pinet_write(addr, val, type);
875 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
876 rtg_write((addr & 0x0FFFFFFF), val, type);
879 if (custom_write_amiga(cfg, addr, val, type) != -1) {
888 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
889 if (handle_mapped_write(cfg, addr, val, type) != -1) {
898 void m68k_write_memory_8(unsigned int address, unsigned int value) {
899 if (platform_write_check(OP_TYPE_BYTE, address, value))
902 if (address & 0xFF000000)
905 write8((uint32_t)address, value);
909 void m68k_write_memory_16(unsigned int address, unsigned int value) {
910 if (platform_write_check(OP_TYPE_WORD, address, value))
913 if (address & 0xFF000000)
916 if (address & 0x01) {
917 write8(value & 0xFF, address);
918 write8((value >> 8) & 0xFF, address + 1);
922 write16((uint32_t)address, value);
926 void m68k_write_memory_32(unsigned int address, unsigned int value) {
927 if (platform_write_check(OP_TYPE_LONGWORD, address, value))
930 if (address & 0xFF000000)
933 if (address & 0x01) {
934 write8(value & 0xFF, address);
935 write16(htobe16(((value >> 8) & 0xFFFF)), address + 1);
936 write8((value >> 24), address + 3);
940 write16(address, value >> 16);
941 write16(address + 2, value);