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 "gpio/ps_protocol.h"
30 #include <sys/ioctl.h>
33 #include <sys/types.h>
36 #define KEY_POLL_INTERVAL_MSEC 5000
38 unsigned char read_ranges;
39 unsigned int read_addr[8];
40 unsigned int read_upper[8];
41 unsigned char *read_data[8];
42 unsigned char write_ranges;
43 unsigned int write_addr[8];
44 unsigned int write_upper[8];
45 unsigned char *write_data[8];
47 int kb_hook_enabled = 0;
48 int mouse_hook_enabled = 0;
49 int cpu_emulation_running = 1;
51 uint8_t mouse_dx = 0, mouse_dy = 0;
52 uint8_t mouse_buttons = 0;
53 uint8_t mouse_extra = 0;
55 extern uint8_t gayle_int;
56 extern uint8_t gayle_ide_enabled;
57 extern uint8_t gayle_emulation_enabled;
58 extern uint8_t gayle_a4k_int;
59 extern volatile unsigned int *gpio;
60 extern volatile uint16_t srdata;
61 extern uint8_t realtime_graphics_debug;
62 uint8_t realtime_disassembly, int2_enabled = 0;
63 uint32_t do_disasm = 0, old_level;
64 uint32_t last_irq = 8, last_last_irq = 8;
66 uint8_t end_signal = 0;
68 char disasm_buf[4096];
70 #define KICKBASE 0xF80000
71 #define KICKSIZE 0x7FFFF
73 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
82 extern m68ki_cpu_core m68ki_cpu;
83 extern int m68ki_initial_cycles;
84 extern int m68ki_remaining_cycles;
86 #define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \
87 CPU_INT_LEVEL = (i << 8); \
88 if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \
89 m68ki_cpu.nmi_pending = TRUE;
90 #define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \
93 #define M68K_SET_IRQ m68k_set_irq
94 #define M68K_END_TIMESLICE m68k_end_timeslice()
97 #define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop");
99 #define DEBUG_EMULATOR
100 #ifdef DEBUG_EMULATOR
106 // Configurable emulator options
107 unsigned int cpu_type = M68K_CPU_TYPE_68000;
108 unsigned int loop_cycles = 300, irq_status = 0;
109 struct emulator_config *cfg = NULL;
110 char keyboard_file[256] = "/dev/input/event1";
112 uint64_t trig_irq = 0, serv_irq = 0;
113 uint16_t irq_delay = 0;
114 unsigned int amiga_reset=0, amiga_reset_last=0;
115 unsigned int do_reset=0;
117 void *ipl_task(void *args) {
118 printf("IPL thread running\n");
119 uint16_t old_irq = 0;
123 value = *(gpio + 13);
125 if (!(value & (1 << PIN_IPL_ZERO))) {
148 amiga_reset=(value & (1 << PIN_RESET));
149 if(amiga_reset!=amiga_reset_last)
151 amiga_reset_last=amiga_reset;
154 printf("Amiga Reset is down...\n");
160 printf("Amiga Reset is up...\n");
165 /*if (gayle_ide_enabled) {
166 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
167 //get_ide(0)->drive[0].intrq = 0;
176 NOP NOP NOP NOP NOP NOP NOP NOP
177 //NOP NOP NOP NOP NOP NOP NOP NOP
178 //NOP NOP NOP NOP NOP NOP NOP NOP
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*/
190 if (mouse_hook_enabled) {
191 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
194 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
195 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
196 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), \
197 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));
198 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), \
199 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));
200 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
206 if (cpu_emulation_running)
207 m68k_execute(loop_cycles);
212 last_irq = ((read_reg() & 0xe000) >> 13);
213 if (last_irq != last_last_irq) {
214 last_last_irq = last_irq;
215 M68K_SET_IRQ(last_irq);
219 if (gayleirq && int2_enabled) {
220 write16(0xdff09c, 0x8000 | (1 << 3) && last_irq != 2);
221 last_last_irq = last_irq;
232 last_last_irq = last_irq;
240 usleep(1000000); // 1sec
241 // while(amiga_reset==0);
242 // printf("CPU emulation reset.\n");
245 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
246 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
247 switch (mouse_extra) {
250 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
254 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
258 // dampen the scroll wheel until next while loop iteration
263 goto stop_cpu_emulation;
268 printf("[CPU] End of CPU thread\n");
272 void *keyboard_task() {
273 struct pollfd kbdpoll[1];
275 char c = 0, c_code = 0, c_type = 0;
276 char grab_message[] = "[KBD] Grabbing keyboard from input layer\n",
277 ungrab_message[] = "[KBD] Ungrabbing keyboard\n";
279 printf("[KBD] Keyboard thread started\n");
281 // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it
282 if (kb_hook_enabled && cfg->keyboard_grab) {
283 printf(grab_message);
284 grab_device(keyboard_fd);
287 kbdpoll[0].fd = keyboard_fd;
288 kbdpoll[0].events = POLLIN;
291 kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC);
292 if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) {
293 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
294 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
295 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
299 // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents
300 if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) {
304 while (get_key_char(&c, &c_code, &c_type)) {
305 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
307 printf("[KBD] Keyboard hook enabled.\n");
308 if (cfg->keyboard_grab) {
309 grab_device(keyboard_fd);
310 printf(grab_message);
312 } else if (kb_hook_enabled) {
313 if (c == 0x1B && c_type) {
315 printf("[KBD] Keyboard hook disabled.\n");
316 if (cfg->keyboard_grab) {
317 release_device(keyboard_fd);
318 printf(ungrab_message);
321 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
328 // pause pressed; trigger nmi (int level 7)
329 if (c == 0x01 && c_type) {
330 printf("[INT] Sending NMI\n");
334 if (!kb_hook_enabled && c_type) {
335 if (c && c == cfg->mouse_toggle_key) {
336 mouse_hook_enabled ^= 1;
337 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
338 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
341 cpu_emulation_running ^= 1;
342 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
345 realtime_graphics_debug ^= 1;
346 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
350 //m68k_pulse_reset();
351 printf("CPU emulation reset.\n");
354 printf("Quitting and exiting emulator.\n");
359 realtime_disassembly ^= 1;
361 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
364 int r = get_mapped_item_by_address(cfg, 0x08000000);
366 printf("Dumping first 16MB of mapped range %d.\n", r);
367 FILE *dmp = fopen("./memdmp.bin", "wb+");
368 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
372 if (c == 's' && realtime_disassembly) {
375 if (c == 'S' && realtime_disassembly) {
384 printf("[KBD] Keyboard thread ending\n");
385 if (cfg->keyboard_grab) {
386 printf(ungrab_message);
387 release_device(keyboard_fd);
392 void stop_cpu_emulation(uint8_t disasm_cur) {
395 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
396 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), \
397 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));
398 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), \
399 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));
400 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
401 realtime_disassembly = 1;
404 cpu_emulation_running = 0;
409 static volatile unsigned char maprom;
411 void sigint_handler(int sig_num) {
413 //cpu_emulation_running = 0;
416 printf("Received sigint %d, exiting.\n", sig_num);
422 if (cfg->platform->shutdown) {
423 cfg->platform->shutdown(cfg);
426 printf("IRQs triggered: %lld\n", trig_irq);
427 printf("IRQs serviced: %lld\n", serv_irq);
432 int main(int argc, char *argv[]) {
434 //const struct sched_param priority = {99};
437 irq_delay = atoi(argv[1]);
438 printf("Setting IRQ delay to %d loops (%s).\n", irq_delay, argv[1]);
441 // Some command line switch stuffles
442 for (g = 1; g < argc; g++) {
443 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
445 printf("%s switch found, but no CPU type specified.\n", argv[g]);
448 cpu_type = get_m68k_cpu_type(argv[g]);
451 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
453 printf("%s switch found, but no config filename specified.\n", argv[g]);
456 cfg = load_config_file(argv[g]);
459 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
461 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
464 strcpy(keyboard_file, argv[g]);
470 printf("No config file specified. Trying to load default.cfg...\n");
471 cfg = load_config_file("default.cfg");
473 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
474 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
476 printf("Failed to allocate memory for emulator config!\n");
479 memset(cfg, 0x00, sizeof(struct emulator_config));
484 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
485 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
488 cfg->platform = make_platform_config("none", "generic");
489 cfg->platform->platform_initial_setup(cfg);
492 if (cfg->mouse_enabled) {
493 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
494 if (mouse_fd == -1) {
495 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
496 cfg->mouse_enabled = 0;
499 * *-*-*-* magic numbers! *-*-*-*
500 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
501 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
502 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
503 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
504 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
506 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
507 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
508 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
509 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
510 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
512 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
516 if (cfg->keyboard_file)
517 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
519 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
521 if (keyboard_fd == -1) {
522 printf("Failed to open keyboard event source.\n");
525 if (cfg->mouse_autoconnect)
526 mouse_hook_enabled = 1;
528 if (cfg->keyboard_autoconnect)
533 signal(SIGINT, sigint_handler);
536 //goto skip_everything;
538 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
540 printf("Enable 200MHz GPCLK0 on GPIO4\n");
541 gpio_enable_200mhz();
543 // reset cpld statemachine first
551 // reset amiga and statemachine
557 printf("Setting CPU type to %d.\n", cpu_type);
558 m68k_set_cpu_type(cpu_type);
562 m68k_set_reg(M68K_REG_PC, 0xF80002);
564 m68k_set_reg(M68K_REG_PC, 0x0);
567 ps_reset_state_machine();
572 printf("Setting CPU type to %d.\n", cpu_type);
573 m68k_set_cpu_type(cpu_type);
576 pthread_t ipl_tid, cpu_tid, kbd_tid;
578 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
580 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
582 pthread_setname_np(ipl_tid, "pistorm: ipl");
583 printf("IPL thread created successfully\n");
586 // create keyboard task
587 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
589 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
591 pthread_setname_np(kbd_tid, "pistorm: kbd");
592 printf("[MAIN] Keyboard thread created successfully\n");
596 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
598 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
600 pthread_setname_np(cpu_tid, "pistorm: cpu");
601 printf("[MAIN] CPU thread created successfully\n");
604 // wait for cpu task to end before closing up and finishing
605 pthread_join(cpu_tid, NULL);
606 printf("[MAIN] All threads appear to have concluded; ending process\n");
616 void cpu_pulse_reset(void) {
619 // printf("Status Reg%x\n",read_reg());
622 // printf("Status Reg%x\n",read_reg());
623 if (cfg->platform->handle_reset)
624 cfg->platform->handle_reset(cfg);
626 //m68k_write_memory_16(INTENA, 0x7FFF);
628 m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
629 m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
634 int cpu_irq_ack(int level) {
635 printf("cpu irq ack\n");
639 static unsigned int target = 0;
640 static uint8_t send_keypress = 0;
642 uint8_t cdtv_dmac_reg_idx_read();
643 void cdtv_dmac_reg_idx_write(uint8_t value);
644 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
645 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
647 #define PLATFORM_CHECK_READ(a) \
648 if (address >= cfg->custom_low && address < cfg->custom_high) { \
649 unsigned int target = 0; \
650 switch(cfg->platform->id) { \
651 case PLATFORM_AMIGA: { \
652 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
653 return handle_piscsi_read(address, a); \
655 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
656 return handle_pinet_read(address, a); \
658 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
659 return rtg_read((address & 0x0FFFFFFF), a); \
661 if (custom_read_amiga(cfg, address, &target, a) != -1) { \
670 if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
671 if (handle_mapped_read(cfg, address, &target, a) != -1) \
675 unsigned int m68k_read_memory_8(unsigned int address) {
676 PLATFORM_CHECK_READ(OP_TYPE_BYTE);
678 /*if (address >= 0xE90000 && address < 0xF00000) {
679 printf("BYTE read from DMAC @%.8X:", address);
680 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_BYTE);
683 cpu_emulation_running = 0;
687 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
688 stop_cpu_emulation(1);
692 if (address & 0xFF000000)
695 unsigned char result = (unsigned int)read8((uint32_t)address);
697 if (mouse_hook_enabled) {
698 if (address == CIAAPRA) {
699 if (mouse_buttons & 0x01) {
700 //mouse_buttons -= 1;
701 return (unsigned int)(result ^ 0x40);
704 return (unsigned int)result;
708 if (kb_hook_enabled) {
709 if (address == CIAAICR) {
710 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
715 if (send_keypress == 2) {
721 if (address == CIAADAT) {
722 //if (send_keypress) {
723 uint8_t c = 0, t = 0;
724 pop_queued_key(&c, &t);
726 result = ((c << 1) | t) ^ 0xFF;
737 unsigned int m68k_read_memory_16(unsigned int address) {
738 PLATFORM_CHECK_READ(OP_TYPE_WORD);
740 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
741 stop_cpu_emulation(1);
744 /*if (address >= 0xE90000 && address < 0xF00000) {
745 printf("WORD read from DMAC @%.8X:", address);
746 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_WORD);
749 cpu_emulation_running = 0;
753 if (mouse_hook_enabled) {
754 if (address == JOY0DAT) {
755 // Forward mouse valueses to Amyga.
756 unsigned short result = (mouse_dy << 8) | (mouse_dx);
757 return (unsigned int)result;
759 /*if (address == CIAAPRA) {
760 unsigned short result = (unsigned int)read16((uint32_t)address);
761 if (mouse_buttons & 0x01) {
762 return (unsigned int)(result | 0x40);
765 return (unsigned int)result;
767 if (address == POTGOR) {
768 unsigned short result = (unsigned int)read16((uint32_t)address);
769 // bit 1 rmb, bit 2 mmb
770 if (mouse_buttons & 0x06) {
771 return (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
772 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
774 return (unsigned int)(result & 0xfffd);
778 if (address & 0xFF000000)
781 if (address & 0x01) {
782 return ((read8(address) << 8) | read8(address + 1));
784 return (unsigned int)read16((uint32_t)address);
787 unsigned int m68k_read_memory_32(unsigned int address) {
788 PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
790 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
791 stop_cpu_emulation(1);
794 /*if (address >= 0xE90000 && address < 0xF00000) {
795 printf("LONGWORD read from DMAC @%.8X:", address);
796 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_LONGWORD);
799 cpu_emulation_running = 0;
803 if (address & 0xFF000000)
806 if (address & 0x01) {
807 uint32_t c = read8(address);
808 c |= (be16toh(read16(address+1)) << 8);
809 c |= (read8(address + 3) << 24);
812 uint16_t a = read16(address);
813 uint16_t b = read16(address + 2);
814 return (a << 16) | b;
817 #define PLATFORM_CHECK_WRITE(a) \
818 if (address >= cfg->custom_low && address < cfg->custom_high) { \
819 switch(cfg->platform->id) { \
820 case PLATFORM_AMIGA: { \
821 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
822 handle_piscsi_write(address, value, a); \
824 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
825 handle_pinet_write(address, value, a); \
827 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
828 rtg_write((address & 0x0FFFFFFF), value, a); \
831 if (custom_write_amiga(cfg, address, value, a) != -1) { \
840 if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
841 if (handle_mapped_write(cfg, address, value, a) != -1) \
845 void m68k_write_memory_8(unsigned int address, unsigned int value) {
846 PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
848 /*if (address >= 0xE90000 && address < 0xF00000) {
849 printf("BYTE write to DMAC @%.8X: %.2X\n", address, value);
850 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_BYTE);
852 cpu_emulation_running = 0;
856 if (address == 0xbfe001) {
857 if (ovl != (value & (1 << 0))) {
858 ovl = (value & (1 << 0));
859 printf("OVL:%x\n", ovl);
863 if (address & 0xFF000000)
866 write8((uint32_t)address, value);
870 void m68k_write_memory_16(unsigned int address, unsigned int value) {
871 PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
873 /*if (address >= 0xE90000 && address < 0xF00000) {
874 printf("WORD write to DMAC @%.8X: %.4X\n", address, value);
875 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_WORD);
877 cpu_emulation_running = 0;
881 if (address == 0xDFF030) {
882 char *serdat = (char *)&value;
883 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
884 // ignore this upper byte as it's not viewable data, only display lower byte.
885 printf("%c", serdat[0]);
887 if (address == 0xDFF09A) {
888 if (!(value & 0x8000)) {
893 else if (value & 0x04) {
898 if (address & 0xFF000000)
902 printf("Unaligned WORD write!\n");
904 write16((uint32_t)address, value);
908 void m68k_write_memory_32(unsigned int address, unsigned int value) {
909 PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
911 /*if (address >= 0xE90000 && address < 0xF00000) {
912 printf("LONGWORD write to DMAC @%.8X: %.8X\n", address, value);
913 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_LONGWORD);
915 cpu_emulation_running = 0;
919 if (address & 0xFF000000)
923 printf("Unaligned LONGWORD write!\n");
925 write16(address, value >> 16);
926 write16(address + 2, value);