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 uint32_t last_irq = 0, last_last_irq = 0;
64 char c = 0, c_code = 0, c_type = 0; // @todo temporary main/cpu_task scope workaround until input moved to a thread
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))) {
140 if (gayle_ide_enabled) {
141 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
142 //get_ide(0)->drive[0].intrq = 0;
150 NOP NOP NOP NOP NOP NOP NOP NOP
151 NOP NOP NOP NOP NOP NOP NOP NOP
152 NOP NOP NOP NOP NOP NOP NOP NOP
153 /*NOP NOP NOP NOP NOP NOP NOP NOP
154 NOP NOP NOP NOP NOP NOP NOP NOP
155 NOP NOP NOP NOP NOP NOP NOP NOP*/
164 if (mouse_hook_enabled) {
165 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
168 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
169 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
170 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), \
171 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));
172 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), \
173 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));
174 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
180 if (cpu_emulation_running)
181 m68k_execute(loop_cycles);
186 last_irq = ((read_reg() & 0xe000) >> 13);
187 if (last_irq != last_last_irq) {
188 last_last_irq = last_irq;
189 M68K_SET_IRQ(last_irq);
193 if (gayleirq && int2_enabled) {
194 write16(0xdff09c, 0x8000 | (1 << 3) && last_irq != 2);
195 last_last_irq = last_irq;
205 last_last_irq = last_irq;
210 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
211 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
212 switch (mouse_extra) {
215 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
219 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
223 // dampen the scroll wheel until next while loop iteration
229 printf("[CPU] End of CPU thread\n");
232 void *keyboard_task() {
233 struct pollfd kbdfd[1];
236 printf("[KBD] Keyboard thread started\n");
238 kbdfd[0].fd = keyboard_fd;
239 kbdfd[0].events = POLLIN;
242 kpoll = poll(kbdfd, 1, KEY_POLL_INTERVAL_MSEC);
243 if ((kpoll > 0) && (kbdfd[0].revents & POLLHUP)) {
244 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
245 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
246 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
250 // if kpoll > 0 then it contains number of events to pull, also check if POLLIN is set in revents
251 if ((kpoll <= 0) || !(kbdfd[0].revents & POLLIN)) {
255 printf("[KBD-DEBUG] Going to process %d events\n", kpoll);
257 while (get_key_char(&c, &c_code, &c_type)) {
258 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
260 printf("Keyboard hook enabled.\n");
262 else if (kb_hook_enabled) {
263 if (c == 0x1B && c_type) {
265 printf("Keyboard hook disabled.\n");
268 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
275 // pause pressed; trigger nmi (int level 7)
276 if (c == 0x01 && c_type) {
277 printf("[INT] Sending NMI\n");
281 if (!kb_hook_enabled && c_type) {
282 if (c && c == cfg->mouse_toggle_key) {
283 mouse_hook_enabled ^= 1;
284 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
285 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
288 cpu_emulation_running ^= 1;
289 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
292 realtime_graphics_debug ^= 1;
293 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
297 //m68k_pulse_reset();
298 printf("CPU emulation reset.\n");
300 // @todo work out how to signal the main process that we want to quit
302 // printf("Quitting and exiting emulator.\n");
303 // goto stop_cpu_emulation;
306 realtime_disassembly ^= 1;
308 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
311 int r = get_mapped_item_by_address(cfg, 0x08000000);
313 printf("Dumping first 16MB of mapped range %d.\n", r);
314 FILE *dmp = fopen("./memdmp.bin", "wb+");
315 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
319 if (c == 's' && realtime_disassembly) {
322 if (c == 'S' && realtime_disassembly) {
331 printf("[KBD] Keyboard thread ending\n");
334 void stop_cpu_emulation(uint8_t disasm_cur) {
337 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
338 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), \
339 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));
340 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), \
341 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));
342 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
343 realtime_disassembly = 1;
346 cpu_emulation_running = 0;
351 static volatile unsigned char maprom;
353 void sigint_handler(int sig_num) {
355 //cpu_emulation_running = 0;
358 printf("Received sigint %d, exiting.\n", sig_num);
364 if (cfg->platform->shutdown) {
365 cfg->platform->shutdown(cfg);
368 printf("IRQs triggered: %lld\n", trig_irq);
369 printf("IRQs serviced: %lld\n", serv_irq);
374 int main(int argc, char *argv[]) {
376 //const struct sched_param priority = {99};
379 irq_delay = atoi(argv[1]);
380 printf("Setting IRQ delay to %d loops (%s).\n", irq_delay, argv[1]);
383 // Some command line switch stuffles
384 for (g = 1; g < argc; g++) {
385 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
387 printf("%s switch found, but no CPU type specified.\n", argv[g]);
390 cpu_type = get_m68k_cpu_type(argv[g]);
393 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
395 printf("%s switch found, but no config filename specified.\n", argv[g]);
398 cfg = load_config_file(argv[g]);
401 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
403 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
406 strcpy(keyboard_file, argv[g]);
412 printf("No config file specified. Trying to load default.cfg...\n");
413 cfg = load_config_file("default.cfg");
415 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
416 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
418 printf("Failed to allocate memory for emulator config!\n");
421 memset(cfg, 0x00, sizeof(struct emulator_config));
426 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
427 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
430 cfg->platform = make_platform_config("none", "generic");
431 cfg->platform->platform_initial_setup(cfg);
434 if (cfg->mouse_enabled) {
435 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
436 if (mouse_fd == -1) {
437 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
438 cfg->mouse_enabled = 0;
441 * *-*-*-* magic numbers! *-*-*-*
442 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
443 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
444 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
445 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
446 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
448 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
449 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
450 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
451 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
452 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
454 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
458 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
459 if (keyboard_fd == -1) {
460 printf("Failed to open keyboard event source.\n");
465 signal(SIGINT, sigint_handler);
468 //goto skip_everything;
470 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
472 printf("Enable 200MHz GPCLK0 on GPIO4\n");
473 gpio_enable_200mhz();
475 // reset cpld statemachine first
483 // reset amiga and statemachine
489 printf("Setting CPU type to %d.\n", cpu_type);
490 m68k_set_cpu_type(cpu_type);
494 m68k_set_reg(M68K_REG_PC, 0xF80002);
496 m68k_set_reg(M68K_REG_PC, 0x0);
499 ps_reset_state_machine();
504 printf("Setting CPU type to %d.\n", cpu_type);
505 m68k_set_cpu_type(cpu_type);
508 pthread_t ipl_tid, cpu_tid, kbd_tid;
510 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
512 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
514 pthread_setname_np(ipl_tid, "pistorm: ipl");
515 printf("IPL thread created successfully\n");
518 // create keyboard task
519 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
521 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
523 pthread_setname_np(kbd_tid, "pistorm: kbd");
524 printf("[MAIN] Keyboard thread created successfully\n");
528 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
530 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
532 pthread_setname_np(cpu_tid, "pistorm: cpu");
533 printf("[MAIN] CPU thread created successfully\n");
536 // wait for cpu task to end before closing up and finishing
537 pthread_join(cpu_tid, NULL);
538 printf("[MAIN] All threads appear to have concluded; ending process\n");
548 void cpu_pulse_reset(void) {
551 // printf("Status Reg%x\n",read_reg());
554 // printf("Status Reg%x\n",read_reg());
555 if (cfg->platform->handle_reset)
556 cfg->platform->handle_reset(cfg);
559 m68k_write_memory_16(INTENA, 0x7FFF);
561 m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
562 m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
567 int cpu_irq_ack(int level) {
568 printf("cpu irq ack\n");
572 static unsigned int target = 0;
573 static uint8_t send_keypress = 0;
575 uint8_t cdtv_dmac_reg_idx_read();
576 void cdtv_dmac_reg_idx_write(uint8_t value);
577 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
578 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
580 #define PLATFORM_CHECK_READ(a) \
581 if (address >= cfg->custom_low && address < cfg->custom_high) { \
582 unsigned int target = 0; \
583 switch(cfg->platform->id) { \
584 case PLATFORM_AMIGA: { \
585 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
586 return handle_piscsi_read(address, a); \
588 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
589 return handle_pinet_read(address, a); \
591 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
592 return rtg_read((address & 0x0FFFFFFF), a); \
594 if (custom_read_amiga(cfg, address, &target, a) != -1) { \
603 if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
604 if (handle_mapped_read(cfg, address, &target, a) != -1) \
608 unsigned int m68k_read_memory_8(unsigned int address) {
609 PLATFORM_CHECK_READ(OP_TYPE_BYTE);
611 /*if (address >= 0xE90000 && address < 0xF00000) {
612 printf("BYTE read from DMAC @%.8X:", address);
613 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_BYTE);
616 cpu_emulation_running = 0;
620 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
621 stop_cpu_emulation(1);
625 if (address & 0xFF000000)
628 unsigned char result = (unsigned int)read8((uint32_t)address);
630 if (mouse_hook_enabled) {
631 if (address == CIAAPRA) {
632 if (mouse_buttons & 0x01) {
633 //mouse_buttons -= 1;
634 return (unsigned int)(result ^ 0x40);
637 return (unsigned int)result;
641 if (kb_hook_enabled) {
642 if (address == CIAAICR) {
643 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
648 if (send_keypress == 2) {
654 if (address == CIAADAT) {
655 //if (send_keypress) {
656 uint8_t c = 0, t = 0;
657 pop_queued_key(&c, &t);
659 result = ((c << 1) | t) ^ 0xFF;
670 unsigned int m68k_read_memory_16(unsigned int address) {
671 PLATFORM_CHECK_READ(OP_TYPE_WORD);
673 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
674 stop_cpu_emulation(1);
677 /*if (address >= 0xE90000 && address < 0xF00000) {
678 printf("WORD read from DMAC @%.8X:", address);
679 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_WORD);
682 cpu_emulation_running = 0;
686 if (mouse_hook_enabled) {
687 if (address == JOY0DAT) {
688 // Forward mouse valueses to Amyga.
689 unsigned short result = (mouse_dy << 8) | (mouse_dx);
690 return (unsigned int)result;
692 /*if (address == CIAAPRA) {
693 unsigned short result = (unsigned int)read16((uint32_t)address);
694 if (mouse_buttons & 0x01) {
695 return (unsigned int)(result | 0x40);
698 return (unsigned int)result;
700 if (address == POTGOR) {
701 unsigned short result = (unsigned int)read16((uint32_t)address);
702 // bit 1 rmb, bit 2 mmb
703 if (mouse_buttons & 0x06) {
704 return (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
705 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
707 return (unsigned int)(result & 0xfffd);
711 if (address & 0xFF000000)
714 if (address & 0x01) {
715 return ((read8(address) << 8) | read8(address + 1));
717 return (unsigned int)read16((uint32_t)address);
720 unsigned int m68k_read_memory_32(unsigned int address) {
721 PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
723 /*if (m68k_get_reg(NULL, M68K_REG_PC) >= 0x080032F0 && m68k_get_reg(NULL, M68K_REG_PC) <= 0x080032F0 + 0x4000) {
724 stop_cpu_emulation(1);
727 /*if (address >= 0xE90000 && address < 0xF00000) {
728 printf("LONGWORD read from DMAC @%.8X:", address);
729 uint32_t v = cdtv_dmac_read(address & 0xFFFF, OP_TYPE_LONGWORD);
732 cpu_emulation_running = 0;
736 if (address & 0xFF000000)
739 if (address & 0x01) {
740 uint32_t c = read8(address);
741 c |= (be16toh(read16(address+1)) << 8);
742 c |= (read8(address + 3) << 24);
745 uint16_t a = read16(address);
746 uint16_t b = read16(address + 2);
747 return (a << 16) | b;
750 #define PLATFORM_CHECK_WRITE(a) \
751 if (address >= cfg->custom_low && address < cfg->custom_high) { \
752 switch(cfg->platform->id) { \
753 case PLATFORM_AMIGA: { \
754 if (address >= PISCSI_OFFSET && address < PISCSI_UPPER) { \
755 handle_piscsi_write(address, value, a); \
757 if (address >= PINET_OFFSET && address < PINET_UPPER) { \
758 handle_pinet_write(address, value, a); \
760 if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
761 rtg_write((address & 0x0FFFFFFF), value, a); \
764 if (custom_write_amiga(cfg, address, value, a) != -1) { \
773 if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
774 if (handle_mapped_write(cfg, address, value, a) != -1) \
778 void m68k_write_memory_8(unsigned int address, unsigned int value) {
779 PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
781 /*if (address >= 0xE90000 && address < 0xF00000) {
782 printf("BYTE write to DMAC @%.8X: %.2X\n", address, value);
783 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_BYTE);
785 cpu_emulation_running = 0;
789 if (address == 0xbfe001) {
790 if (ovl != (value & (1 << 0))) {
791 ovl = (value & (1 << 0));
792 printf("OVL:%x\n", ovl);
796 if (address & 0xFF000000)
799 write8((uint32_t)address, value);
803 void m68k_write_memory_16(unsigned int address, unsigned int value) {
804 PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
806 /*if (address >= 0xE90000 && address < 0xF00000) {
807 printf("WORD write to DMAC @%.8X: %.4X\n", address, value);
808 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_WORD);
810 cpu_emulation_running = 0;
814 if (address == 0xDFF030) {
815 char *serdat = (char *)&value;
816 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
817 // ignore this upper byte as it's not viewable data, only display lower byte.
818 printf("%c", serdat[0]);
820 if (address == 0xDFF09A) {
821 if (!(value & 0x8000)) {
826 else if (value & 0x04) {
831 if (address & 0xFF000000)
835 printf("Unaligned WORD write!\n");
837 write16((uint32_t)address, value);
841 void m68k_write_memory_32(unsigned int address, unsigned int value) {
842 PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
844 /*if (address >= 0xE90000 && address < 0xF00000) {
845 printf("LONGWORD write to DMAC @%.8X: %.8X\n", address, value);
846 cdtv_dmac_write(address & 0xFFFF, value, OP_TYPE_LONGWORD);
848 cpu_emulation_running = 0;
852 if (address & 0xFF000000)
856 printf("Unaligned LONGWORD write!\n");
858 write16(address, value >> 16);
859 write16(address + 2, value);