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))) {
151 amiga_reset=(value & (1 << PIN_RESET));
152 if(amiga_reset!=amiga_reset_last)
154 amiga_reset_last=amiga_reset;
157 printf("Amiga Reset is down...\n");
163 printf("Amiga Reset is up...\n");
168 /*if (gayle_ide_enabled) {
169 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
170 //get_ide(0)->drive[0].intrq = 0;
179 NOP NOP NOP NOP NOP NOP NOP NOP
180 //NOP NOP NOP NOP NOP NOP NOP NOP
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*/
193 if (mouse_hook_enabled) {
194 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
197 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
198 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
199 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), \
200 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));
201 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), \
202 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));
203 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
209 if (cpu_emulation_running)
210 m68k_execute(loop_cycles);
215 last_irq = ((read_reg() & 0xe000) >> 13);
216 if (last_irq != last_last_irq) {
217 last_last_irq = last_irq;
218 M68K_SET_IRQ(last_irq);
222 if (gayleirq && int2_enabled) {
223 write16(0xdff09c, 0x8000 | (1 << 3) && last_irq != 2);
224 last_last_irq = last_irq;
235 last_last_irq = last_irq;
242 usleep(1000000); // 1sec
244 // while(amiga_reset==0);
245 // printf("CPU emulation reset.\n");
248 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
249 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
250 switch (mouse_extra) {
253 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
257 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
261 // dampen the scroll wheel until next while loop iteration
265 if (load_new_config) {
266 printf("[CPU] Loading new config file.\n");
267 goto stop_cpu_emulation;
271 goto stop_cpu_emulation;
276 printf("[CPU] End of CPU thread\n");
280 void *keyboard_task() {
281 struct pollfd kbdpoll[1];
283 char c = 0, c_code = 0, c_type = 0;
284 char grab_message[] = "[KBD] Grabbing keyboard from input layer\n",
285 ungrab_message[] = "[KBD] Ungrabbing keyboard\n";
287 printf("[KBD] Keyboard thread started\n");
289 // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it
290 if (kb_hook_enabled && cfg->keyboard_grab) {
291 printf(grab_message);
292 grab_device(keyboard_fd);
295 kbdpoll[0].fd = keyboard_fd;
296 kbdpoll[0].events = POLLIN;
299 kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC);
300 if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) {
301 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
302 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
303 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
307 // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents
308 if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) {
312 while (get_key_char(&c, &c_code, &c_type)) {
313 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
315 printf("[KBD] Keyboard hook enabled.\n");
316 if (cfg->keyboard_grab) {
317 grab_device(keyboard_fd);
318 printf(grab_message);
320 } else if (kb_hook_enabled) {
321 if (c == 0x1B && c_type) {
323 printf("[KBD] Keyboard hook disabled.\n");
324 if (cfg->keyboard_grab) {
325 release_device(keyboard_fd);
326 printf(ungrab_message);
329 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
336 // pause pressed; trigger nmi (int level 7)
337 if (c == 0x01 && c_type) {
338 printf("[INT] Sending NMI\n");
342 if (!kb_hook_enabled && c_type) {
343 if (c && c == cfg->mouse_toggle_key) {
344 mouse_hook_enabled ^= 1;
345 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
346 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
349 cpu_emulation_running ^= 1;
350 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
353 realtime_graphics_debug ^= 1;
354 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
358 //m68k_pulse_reset();
359 printf("CPU emulation reset.\n");
362 printf("Quitting and exiting emulator.\n");
367 realtime_disassembly ^= 1;
369 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
372 int r = get_mapped_item_by_address(cfg, 0x08000000);
374 printf("Dumping first 16MB of mapped range %d.\n", r);
375 FILE *dmp = fopen("./memdmp.bin", "wb+");
376 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
380 if (c == 's' && realtime_disassembly) {
383 if (c == 'S' && realtime_disassembly) {
392 printf("[KBD] Keyboard thread ending\n");
393 if (cfg->keyboard_grab) {
394 printf(ungrab_message);
395 release_device(keyboard_fd);
400 void stop_cpu_emulation(uint8_t disasm_cur) {
403 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
404 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), \
405 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));
406 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), \
407 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));
408 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
409 realtime_disassembly = 1;
412 cpu_emulation_running = 0;
417 static volatile unsigned char maprom;
419 void sigint_handler(int sig_num) {
421 //cpu_emulation_running = 0;
424 printf("Received sigint %d, exiting.\n", sig_num);
430 if (cfg->platform->shutdown) {
431 cfg->platform->shutdown(cfg);
434 while (!emulator_exiting) {
435 emulator_exiting = 1;
439 printf("IRQs triggered: %lld\n", trig_irq);
440 printf("IRQs serviced: %lld\n", serv_irq);
445 int main(int argc, char *argv[]) {
447 //const struct sched_param priority = {99};
449 // Some command line switch stuffles
450 for (g = 1; g < argc; g++) {
451 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
453 printf("%s switch found, but no CPU type specified.\n", argv[g]);
456 cpu_type = get_m68k_cpu_type(argv[g]);
459 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
461 printf("%s switch found, but no config filename specified.\n", argv[g]);
464 cfg = load_config_file(argv[g]);
466 set_pistorm_devcfg_filename(argv[g]);
470 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
472 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
475 strcpy(keyboard_file, argv[g]);
483 if (load_new_config != 0) {
484 uint8_t config_action = load_new_config - 1;
486 free_config_file(cfg);
492 /*for(int i = 0; i < 2 * SIZE_MEGA; i++) {
496 switch(config_action) {
499 cfg = load_config_file(get_pistorm_devcfg_filename());
502 cfg = load_config_file("default.cfg");
508 printf("No config file specified. Trying to load default.cfg...\n");
509 cfg = load_config_file("default.cfg");
511 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
512 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
514 printf("Failed to allocate memory for emulator config!\n");
517 memset(cfg, 0x00, sizeof(struct emulator_config));
522 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
523 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
526 cfg->platform = make_platform_config("none", "generic");
527 cfg->platform->platform_initial_setup(cfg);
530 if (cfg->mouse_enabled) {
531 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
532 if (mouse_fd == -1) {
533 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
534 cfg->mouse_enabled = 0;
537 * *-*-*-* magic numbers! *-*-*-*
538 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
539 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
540 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
541 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
542 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
544 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
545 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
546 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
547 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
548 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
550 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
554 if (cfg->keyboard_file)
555 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
557 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
559 if (keyboard_fd == -1) {
560 printf("Failed to open keyboard event source.\n");
563 if (cfg->mouse_autoconnect)
564 mouse_hook_enabled = 1;
566 if (cfg->keyboard_autoconnect)
571 signal(SIGINT, sigint_handler);
574 //goto skip_everything;
576 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
578 printf("Enable 200MHz GPCLK0 on GPIO4\n");
579 gpio_enable_200mhz();
581 // reset cpld statemachine first
589 // reset amiga and statemachine
595 printf("Setting CPU type to %d.\n", cpu_type);
596 m68k_set_cpu_type(cpu_type);
600 m68k_set_reg(M68K_REG_PC, 0xF80002);
602 m68k_set_reg(M68K_REG_PC, 0x0);
605 ps_reset_state_machine();
610 printf("Setting CPU type to %d.\n", cpu_type);
611 m68k_set_cpu_type(cpu_type);
614 pthread_t ipl_tid = 0, cpu_tid, kbd_tid;
617 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
619 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
621 pthread_setname_np(ipl_tid, "pistorm: ipl");
622 printf("IPL thread created successfully\n");
626 // create keyboard task
627 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
629 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
631 pthread_setname_np(kbd_tid, "pistorm: kbd");
632 printf("[MAIN] Keyboard thread created successfully\n");
636 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
638 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
640 pthread_setname_np(cpu_tid, "pistorm: cpu");
641 printf("[MAIN] CPU thread created successfully\n");
644 // wait for cpu task to end before closing up and finishing
645 pthread_join(cpu_tid, NULL);
647 while (!emulator_exiting) {
648 emulator_exiting = 1;
652 if (load_new_config == 0)
653 printf("[MAIN] All threads appear to have concluded; ending process\n");
660 if (load_new_config != 0)
663 if (cfg->platform->shutdown) {
664 cfg->platform->shutdown(cfg);
670 void cpu_pulse_reset(void) {
672 if (cfg->platform->handle_reset)
673 cfg->platform->handle_reset(cfg);
675 //m68k_write_memory_16(INTENA, 0x7FFF);
677 //m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
678 //m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
683 int cpu_irq_ack(int level) {
684 printf("cpu irq ack\n");
688 static unsigned int target = 0;
689 static uint8_t send_keypress = 0;
691 uint8_t cdtv_dmac_reg_idx_read();
692 void cdtv_dmac_reg_idx_write(uint8_t value);
693 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
694 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
696 #define PLATFORM_CHECK_READ(a) \
697 if (address >= cfg->custom_low && address < cfg->custom_high) { \
698 unsigned int target = 0; \
699 switch(cfg->platform->id) { \
700 case PLATFORM_AMIGA: { \
701 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
702 return handle_piscsi_read(address, a); \
704 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
705 return handle_pinet_read(address, a); \
707 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
708 return rtg_read((address & 0x0FFFFFFF), a); \
710 if (custom_read_amiga(cfg, address, &target, a) != -1) { \
719 if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
720 if (handle_mapped_read(cfg, address, &target, a) != -1) \
724 unsigned int m68k_read_memory_8(unsigned int address) {
725 PLATFORM_CHECK_READ(OP_TYPE_BYTE);
727 /*if (address >= 0xE90000 && address < 0xF00000) {
728 printf("BYTE read from DMAC @%.8X:", address);
729 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_BYTE);
732 cpu_emulation_running = 0;
736 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
737 stop_cpu_emulation(1);
741 if (address & 0xFF000000)
744 unsigned char result = (unsigned int)read8((uint32_t)address);
746 if (mouse_hook_enabled) {
747 if (address == CIAAPRA) {
748 if (mouse_buttons & 0x01) {
749 //mouse_buttons -= 1;
750 return (unsigned int)(result ^ 0x40);
753 return (unsigned int)result;
757 if (kb_hook_enabled) {
758 if (address == CIAAICR) {
759 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
764 if (send_keypress == 2) {
770 if (address == CIAADAT) {
771 //if (send_keypress) {
772 uint8_t c = 0, t = 0;
773 pop_queued_key(&c, &t);
775 result = ((c << 1) | t) ^ 0xFF;
786 unsigned int m68k_read_memory_16(unsigned int address) {
787 PLATFORM_CHECK_READ(OP_TYPE_WORD);
789 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
790 stop_cpu_emulation(1);
793 /*if (address >= 0xE90000 && address < 0xF00000) {
794 printf("WORD read from DMAC @%.8X:", address);
795 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_WORD);
798 cpu_emulation_running = 0;
802 if (mouse_hook_enabled) {
803 if (address == JOY0DAT) {
804 // Forward mouse valueses to Amyga.
805 unsigned short result = (mouse_dy << 8) | (mouse_dx);
806 return (unsigned int)result;
808 /*if (address == CIAAPRA) {
809 unsigned short result = (unsigned int)read16((uint32_t)address);
810 if (mouse_buttons & 0x01) {
811 return (unsigned int)(result | 0x40);
814 return (unsigned int)result;
816 if (address == POTGOR) {
817 unsigned short result = (unsigned int)read16((uint32_t)address);
818 // bit 1 rmb, bit 2 mmb
819 if (mouse_buttons & 0x06) {
820 return (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
821 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
823 return (unsigned int)(result & 0xfffd);
827 if (address & 0xFF000000)
830 if (address & 0x01) {
831 return ((read8(address) << 8) | read8(address + 1));
833 return (unsigned int)read16((uint32_t)address);
836 unsigned int m68k_read_memory_32(unsigned int address) {
837 PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
839 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
840 stop_cpu_emulation(1);
843 /*if (address >= 0xE90000 && address < 0xF00000) {
844 printf("LONGWORD read from DMAC @%.8X:", address);
845 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_LONGWORD);
848 cpu_emulation_running = 0;
852 if (address & 0xFF000000)
855 if (address & 0x01) {
856 uint32_t c = read8(address);
857 c |= (be16toh(read16(address+1)) << 8);
858 c |= (read8(address + 3) << 24);
861 uint16_t a = read16(address);
862 uint16_t b = read16(address + 2);
863 return (a << 16) | b;
866 #define PLATFORM_CHECK_WRITE(a) \
867 if (address >= cfg->custom_low && address < cfg->custom_high) { \
868 switch(cfg->platform->id) { \
869 case PLATFORM_AMIGA: { \
870 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
871 handle_piscsi_write(address, value, a); \
874 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
875 handle_pinet_write(address, value, a); \
878 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
879 rtg_write((address & 0x0FFFFFFF), value, a); \
882 if (custom_write_amiga(cfg, address, value, a) != -1) { \
891 if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
892 if (handle_mapped_write(cfg, address, value, a) != -1) \
896 void m68k_write_memory_8(unsigned int address, unsigned int value) {
897 PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
899 /*if (address >= 0xE90000 && address < 0xF00000) {
900 printf("BYTE write to DMAC @%.8X: %.2X\n", address, value);
901 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_BYTE);
903 cpu_emulation_running = 0;
907 if (address == 0xbfe001) {
908 if (ovl != (value & (1 << 0))) {
909 ovl = (value & (1 << 0));
910 printf("OVL:%x\n", ovl);
914 if (address & 0xFF000000)
917 write8((uint32_t)address, value);
921 void m68k_write_memory_16(unsigned int address, unsigned int value) {
922 PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
924 /*if (address >= 0xE90000 && address < 0xF00000) {
925 printf("WORD write to DMAC @%.8X: %.4X\n", address, value);
926 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_WORD);
928 cpu_emulation_running = 0;
932 if (address == 0xDFF030) {
933 char *serdat = (char *)&value;
934 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
935 // ignore this upper byte as it's not viewable data, only display lower byte.
936 printf("%c", serdat[0]);
938 if (address == 0xDFF09A) {
939 if (!(value & 0x8000)) {
944 else if (value & 0x04) {
949 if (address & 0xFF000000)
953 printf("Unaligned WORD write!\n");
955 write16((uint32_t)address, value);
959 void m68k_write_memory_32(unsigned int address, unsigned int value) {
960 PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
962 /*if (address >= 0xE90000 && address < 0xF00000) {
963 printf("LONGWORD write to DMAC @%.8X: %.8X\n", address, value);
964 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_LONGWORD);
966 cpu_emulation_running = 0;
970 if (address & 0xFF000000)
974 printf("Unaligned LONGWORD write!\n");
976 write16(address, value >> 16);
977 write16(address + 2, value);