1 // SPDX-License-Identifier: MIT
5 #include "platforms/platforms.h"
6 #include "input/input.h"
9 #include "platforms/amiga/Gayle.h"
10 #include "platforms/amiga/amiga-registers.h"
11 #include "platforms/amiga/rtg/rtg.h"
12 #include "platforms/amiga/hunk-reloc.h"
13 #include "platforms/amiga/piscsi/piscsi.h"
14 #include "platforms/amiga/piscsi/piscsi-enums.h"
15 #include "platforms/amiga/net/pi-net.h"
16 #include "platforms/amiga/net/pi-net-enums.h"
17 #include "platforms/amiga/pistorm-dev/pistorm-dev.h"
18 #include "platforms/amiga/pistorm-dev/pistorm-dev-enums.h"
19 #include "gpio/ps_protocol.h"
33 #include <sys/ioctl.h>
36 #include <sys/types.h>
39 #define KEY_POLL_INTERVAL_MSEC 5000
41 int kb_hook_enabled = 0;
42 int mouse_hook_enabled = 0;
43 int cpu_emulation_running = 1;
45 uint8_t mouse_dx = 0, mouse_dy = 0;
46 uint8_t mouse_buttons = 0;
47 uint8_t mouse_extra = 0;
49 extern uint8_t gayle_int;
50 extern uint8_t gayle_ide_enabled;
51 extern uint8_t gayle_emulation_enabled;
52 extern uint8_t gayle_a4k_int;
53 extern volatile unsigned int *gpio;
54 extern volatile uint16_t srdata;
55 extern uint8_t realtime_graphics_debug, emulator_exiting;
56 extern uint8_t rtg_on;
57 uint8_t realtime_disassembly, int2_enabled = 0;
58 uint32_t do_disasm = 0, old_level;
59 uint32_t last_irq = 8, last_last_irq = 8;
61 uint8_t end_signal = 0, load_new_config = 0;
63 char disasm_buf[4096];
65 #define KICKBASE 0xF80000
66 #define KICKSIZE 0x7FFFF
68 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
77 extern m68ki_cpu_core m68ki_cpu;
78 extern int m68ki_initial_cycles;
79 extern int m68ki_remaining_cycles;
81 #define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \
82 CPU_INT_LEVEL = (i << 8); \
83 if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \
84 m68ki_cpu.nmi_pending = TRUE;
85 #define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \
88 #define M68K_SET_IRQ m68k_set_irq
89 #define M68K_END_TIMESLICE m68k_end_timeslice()
92 #define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop");
94 #define DEBUG_EMULATOR
101 // Configurable emulator options
102 unsigned int cpu_type = M68K_CPU_TYPE_68000;
103 unsigned int loop_cycles = 300, irq_status = 0;
104 struct emulator_config *cfg = NULL;
105 char keyboard_file[256] = "/dev/input/event1";
107 uint64_t trig_irq = 0, serv_irq = 0;
108 uint16_t irq_delay = 0;
109 unsigned int amiga_reset=0, amiga_reset_last=0;
110 unsigned int do_reset=0;
112 void *ipl_task(void *args) {
113 printf("IPL thread running\n");
114 uint16_t old_irq = 0;
118 value = *(gpio + 13);
120 if (!(value & (1 << PIN_IPL_ZERO))) {
145 amiga_reset=(value & (1 << PIN_RESET));
146 if(amiga_reset!=amiga_reset_last)
148 amiga_reset_last=amiga_reset;
151 printf("Amiga Reset is down...\n");
157 printf("Amiga Reset is up...\n");
162 /*if (gayle_ide_enabled) {
163 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
164 //get_ide(0)->drive[0].intrq = 0;
173 NOP NOP NOP NOP NOP NOP NOP NOP
174 //NOP NOP NOP NOP NOP NOP NOP NOP
175 //NOP NOP NOP NOP NOP NOP NOP NOP
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*/
187 if (mouse_hook_enabled) {
188 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
191 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
192 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
193 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), \
194 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));
195 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), \
196 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));
197 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
203 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);
217 } else if (!irq && last_last_irq != 0) {
225 usleep(1000000); // 1sec
227 // while(amiga_reset==0);
228 // printf("CPU emulation reset.\n");
231 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
232 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
233 switch (mouse_extra) {
236 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
240 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
244 // dampen the scroll wheel until next while loop iteration
248 if (load_new_config) {
249 printf("[CPU] Loading new config file.\n");
250 goto stop_cpu_emulation;
254 goto stop_cpu_emulation;
259 printf("[CPU] End of CPU thread\n");
263 void *keyboard_task() {
264 struct pollfd kbdpoll[1];
266 char c = 0, c_code = 0, c_type = 0;
267 char grab_message[] = "[KBD] Grabbing keyboard from input layer\n",
268 ungrab_message[] = "[KBD] Ungrabbing keyboard\n";
270 printf("[KBD] Keyboard thread started\n");
272 // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it
273 if (kb_hook_enabled && cfg->keyboard_grab) {
274 printf(grab_message);
275 grab_device(keyboard_fd);
278 kbdpoll[0].fd = keyboard_fd;
279 kbdpoll[0].events = POLLIN;
282 kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC);
283 if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) {
284 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
285 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
286 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
290 // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents
291 if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) {
295 while (get_key_char(&c, &c_code, &c_type)) {
296 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
298 printf("[KBD] Keyboard hook enabled.\n");
299 if (cfg->keyboard_grab) {
300 grab_device(keyboard_fd);
301 printf(grab_message);
303 } else if (kb_hook_enabled) {
304 if (c == 0x1B && c_type) {
306 printf("[KBD] Keyboard hook disabled.\n");
307 if (cfg->keyboard_grab) {
308 release_device(keyboard_fd);
309 printf(ungrab_message);
312 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
319 // pause pressed; trigger nmi (int level 7)
320 if (c == 0x01 && c_type) {
321 printf("[INT] Sending NMI\n");
325 if (!kb_hook_enabled && c_type) {
326 if (c && c == cfg->mouse_toggle_key) {
327 mouse_hook_enabled ^= 1;
328 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
329 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
332 cpu_emulation_running ^= 1;
333 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
336 realtime_graphics_debug ^= 1;
337 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
341 //m68k_pulse_reset();
342 printf("CPU emulation reset.\n");
345 printf("Quitting and exiting emulator.\n");
350 realtime_disassembly ^= 1;
352 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
355 int r = get_mapped_item_by_address(cfg, 0x08000000);
357 printf("Dumping first 16MB of mapped range %d.\n", r);
358 FILE *dmp = fopen("./memdmp.bin", "wb+");
359 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
363 if (c == 's' && realtime_disassembly) {
366 if (c == 'S' && realtime_disassembly) {
375 printf("[KBD] Keyboard thread ending\n");
376 if (cfg->keyboard_grab) {
377 printf(ungrab_message);
378 release_device(keyboard_fd);
383 void stop_cpu_emulation(uint8_t disasm_cur) {
386 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
387 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), \
388 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));
389 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), \
390 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));
391 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
392 realtime_disassembly = 1;
395 cpu_emulation_running = 0;
400 static volatile unsigned char maprom;
402 void sigint_handler(int sig_num) {
404 //cpu_emulation_running = 0;
407 printf("Received sigint %d, exiting.\n", sig_num);
413 if (cfg->platform->shutdown) {
414 cfg->platform->shutdown(cfg);
417 while (!emulator_exiting) {
418 emulator_exiting = 1;
422 printf("IRQs triggered: %lld\n", trig_irq);
423 printf("IRQs serviced: %lld\n", serv_irq);
428 int main(int argc, char *argv[]) {
433 //const struct sched_param priority = {99};
435 // Some command line switch stuffles
436 for (g = 1; g < argc; g++) {
437 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
439 printf("%s switch found, but no CPU type specified.\n", argv[g]);
442 cpu_type = get_m68k_cpu_type(argv[g]);
445 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
447 printf("%s switch found, but no config filename specified.\n", argv[g]);
450 FILE *chk = fopen(argv[g], "rb");
452 printf("Config file %s does not exist, please check that you've specified the path correctly.\n", argv[g]);
456 set_pistorm_devcfg_filename(argv[g]);
460 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
462 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
465 strcpy(keyboard_file, argv[g]);
473 ps_reset_state_machine();
477 if (load_new_config != 0) {
478 uint8_t config_action = load_new_config - 1;
481 free_config_file(cfg);
486 switch(config_action) {
489 cfg = load_config_file(get_pistorm_devcfg_filename());
492 cfg = load_config_file("default.cfg");
498 printf("No config file specified. Trying to load default.cfg...\n");
499 cfg = load_config_file("default.cfg");
501 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
502 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
504 printf("Failed to allocate memory for emulator config!\n");
507 memset(cfg, 0x00, sizeof(struct emulator_config));
512 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
513 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
516 cfg->platform = make_platform_config("none", "generic");
517 cfg->platform->platform_initial_setup(cfg);
520 if (cfg->mouse_enabled) {
521 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
522 if (mouse_fd == -1) {
523 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
524 cfg->mouse_enabled = 0;
527 * *-*-*-* magic numbers! *-*-*-*
528 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
529 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
530 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
531 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
532 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
534 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
535 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
536 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
537 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
538 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
540 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
544 if (cfg->keyboard_file)
545 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
547 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
549 if (keyboard_fd == -1) {
550 printf("Failed to open keyboard event source.\n");
553 if (cfg->mouse_autoconnect)
554 mouse_hook_enabled = 1;
556 if (cfg->keyboard_autoconnect)
561 signal(SIGINT, sigint_handler);
563 ps_reset_state_machine();
568 printf("Setting CPU type to %d.\n", cpu_type);
569 m68k_set_cpu_type(cpu_type);
572 pthread_t ipl_tid = 0, cpu_tid, kbd_tid;
575 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
577 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
579 pthread_setname_np(ipl_tid, "pistorm: ipl");
580 printf("IPL thread created successfully\n");
584 // create keyboard task
585 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
587 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
589 pthread_setname_np(kbd_tid, "pistorm: kbd");
590 printf("[MAIN] Keyboard thread created successfully\n");
594 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
596 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
598 pthread_setname_np(cpu_tid, "pistorm: cpu");
599 printf("[MAIN] CPU thread created successfully\n");
602 // wait for cpu task to end before closing up and finishing
603 pthread_join(cpu_tid, NULL);
605 while (!emulator_exiting) {
606 emulator_exiting = 1;
610 if (load_new_config == 0)
611 printf("[MAIN] All threads appear to have concluded; ending process\n");
618 if (load_new_config != 0)
621 if (cfg->platform->shutdown) {
622 cfg->platform->shutdown(cfg);
628 void cpu_pulse_reset(void) {
630 if (cfg->platform->handle_reset)
631 cfg->platform->handle_reset(cfg);
633 //m68k_write_memory_16(INTENA, 0x7FFF);
635 //m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
636 //m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
641 int cpu_irq_ack(int level) {
642 printf("cpu irq ack\n");
646 static unsigned int target = 0;
647 static uint8_t send_keypress = 0;
648 static uint32_t platform_res, rres;
650 uint8_t cdtv_dmac_reg_idx_read();
651 void cdtv_dmac_reg_idx_write(uint8_t value);
652 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
653 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
655 static inline void inline_write_16(unsigned int address, unsigned int data) {
656 *(gpio + 0) = GPFSEL0_OUTPUT;
657 *(gpio + 1) = GPFSEL1_OUTPUT;
658 *(gpio + 2) = GPFSEL2_OUTPUT;
660 *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0);
661 *(gpio + 7) = 1 << PIN_WR;
662 *(gpio + 10) = 1 << PIN_WR;
663 *(gpio + 10) = 0xffffec;
665 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
666 *(gpio + 7) = 1 << PIN_WR;
667 *(gpio + 10) = 1 << PIN_WR;
668 *(gpio + 10) = 0xffffec;
670 *(gpio + 7) = ((0x0000 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
671 *(gpio + 7) = 1 << PIN_WR;
672 *(gpio + 10) = 1 << PIN_WR;
673 *(gpio + 10) = 0xffffec;
675 *(gpio + 0) = GPFSEL0_INPUT;
676 *(gpio + 1) = GPFSEL1_INPUT;
677 *(gpio + 2) = GPFSEL2_INPUT;
679 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
682 static inline void inline_write_8(unsigned int address, unsigned int data) {
683 if ((address & 1) == 0)
684 data = data + (data << 8); // EVEN, A0=0,UDS
686 data = data & 0xff; // ODD , A0=1,LDS
688 *(gpio + 0) = GPFSEL0_OUTPUT;
689 *(gpio + 1) = GPFSEL1_OUTPUT;
690 *(gpio + 2) = GPFSEL2_OUTPUT;
692 *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0);
693 *(gpio + 7) = 1 << PIN_WR;
694 *(gpio + 10) = 1 << PIN_WR;
695 *(gpio + 10) = 0xffffec;
697 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
698 *(gpio + 7) = 1 << PIN_WR;
699 *(gpio + 10) = 1 << PIN_WR;
700 *(gpio + 10) = 0xffffec;
702 *(gpio + 7) = ((0x0100 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
703 *(gpio + 7) = 1 << PIN_WR;
704 *(gpio + 10) = 1 << PIN_WR;
705 *(gpio + 10) = 0xffffec;
707 *(gpio + 0) = GPFSEL0_INPUT;
708 *(gpio + 1) = GPFSEL1_INPUT;
709 *(gpio + 2) = GPFSEL2_INPUT;
711 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
714 static inline void inline_write_32(unsigned int address, unsigned int value) {
715 inline_write_16(address, value >> 16);
716 inline_write_16(address + 2, value);
719 static inline unsigned int inline_read_16(unsigned int address) {
720 *(gpio + 0) = GPFSEL0_OUTPUT;
721 *(gpio + 1) = GPFSEL1_OUTPUT;
722 *(gpio + 2) = GPFSEL2_OUTPUT;
724 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
725 *(gpio + 7) = 1 << PIN_WR;
726 *(gpio + 10) = 1 << PIN_WR;
727 *(gpio + 10) = 0xffffec;
729 *(gpio + 7) = ((0x0200 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
730 *(gpio + 7) = 1 << PIN_WR;
731 *(gpio + 10) = 1 << PIN_WR;
732 *(gpio + 10) = 0xffffec;
734 *(gpio + 0) = GPFSEL0_INPUT;
735 *(gpio + 1) = GPFSEL1_INPUT;
736 *(gpio + 2) = GPFSEL2_INPUT;
738 *(gpio + 7) = (REG_DATA << PIN_A0);
739 *(gpio + 7) = 1 << PIN_RD;
741 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
742 unsigned int value = *(gpio + 13);
744 *(gpio + 10) = 0xffffec;
746 return (value >> 8) & 0xffff;
749 static inline unsigned int inline_read_8(unsigned int address) {
750 *(gpio + 0) = GPFSEL0_OUTPUT;
751 *(gpio + 1) = GPFSEL1_OUTPUT;
752 *(gpio + 2) = GPFSEL2_OUTPUT;
754 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
755 *(gpio + 7) = 1 << PIN_WR;
756 *(gpio + 10) = 1 << PIN_WR;
757 *(gpio + 10) = 0xffffec;
759 *(gpio + 7) = ((0x0300 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
760 *(gpio + 7) = 1 << PIN_WR;
761 *(gpio + 10) = 1 << PIN_WR;
762 *(gpio + 10) = 0xffffec;
764 *(gpio + 0) = GPFSEL0_INPUT;
765 *(gpio + 1) = GPFSEL1_INPUT;
766 *(gpio + 2) = GPFSEL2_INPUT;
768 *(gpio + 7) = (REG_DATA << PIN_A0);
769 *(gpio + 7) = 1 << PIN_RD;
771 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
772 unsigned int value = *(gpio + 13);
774 *(gpio + 10) = 0xffffec;
776 value = (value >> 8) & 0xffff;
778 if ((address & 1) == 0)
779 return (value >> 8) & 0xff; // EVEN, A0=0,UDS
781 return value & 0xff; // ODD , A0=1,LDS
784 static inline unsigned int inline_read_32(unsigned int address) {
785 unsigned int a = inline_read_16(address);
786 unsigned int b = inline_read_16(address + 2);
787 return (a << 16) | b;
790 static inline uint32_t ps_read(uint8_t type, uint32_t addr) {
793 return inline_read_8(addr);
795 return inline_read_16(addr);
796 case OP_TYPE_LONGWORD:
797 return inline_read_32(addr);
799 // This shouldn't actually happen.
803 static inline int32_t platform_read_check(uint8_t type, uint32_t addr, uint32_t *res) {
804 switch (cfg->platform->id) {
808 if (mouse_hook_enabled && (mouse_buttons & 0x01)) {
809 rres = (uint32_t)ps_read(type, addr);
810 *res = (rres ^ 0x40);
816 if (kb_hook_enabled) {
817 rres = (uint32_t)ps_read(type, addr);
818 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
823 if (send_keypress == 2) {
832 if (kb_hook_enabled) {
833 rres = (uint32_t)ps_read(type, addr);
834 uint8_t c = 0, t = 0;
835 pop_queued_key(&c, &t);
837 rres = ((c << 1) | t) ^ 0xFF;
845 if (mouse_hook_enabled) {
846 unsigned short result = (mouse_dy << 8) | (mouse_dx);
847 *res = (unsigned int)result;
853 if (mouse_hook_enabled) {
854 unsigned short result = (unsigned short)ps_read(type, addr);
855 // bit 1 rmb, bit 2 mmb
856 if (mouse_buttons & 0x06) {
857 *res = (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
858 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
861 *res = (unsigned int)(result & 0xfffd);
870 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
871 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
872 *res = handle_piscsi_read(addr, type);
875 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
876 *res = handle_pinet_read(addr, type);
879 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
880 *res = rtg_read((addr & 0x0FFFFFFF), type);
883 if (custom_read_amiga(cfg, addr, &target, type) != -1) {
893 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
894 if (handle_mapped_read(cfg, addr, &target, type) != -1) {
903 unsigned int m68k_read_memory_8(unsigned int address) {
904 if (platform_read_check(OP_TYPE_BYTE, address, &platform_res)) {
908 if (address & 0xFF000000)
911 return (unsigned int)inline_read_8((uint32_t)address);
914 unsigned int m68k_read_memory_16(unsigned int address) {
915 if (platform_read_check(OP_TYPE_WORD, address, &platform_res)) {
919 if (address & 0xFF000000)
922 if (address & 0x01) {
923 return ((inline_read_8(address) << 8) | inline_read_8(address + 1));
925 return (unsigned int)inline_read_16((uint32_t)address);
928 unsigned int m68k_read_memory_32(unsigned int address) {
929 if (platform_read_check(OP_TYPE_LONGWORD, address, &platform_res)) {
933 if (address & 0xFF000000)
936 if (address & 0x01) {
937 uint32_t c = inline_read_8(address);
938 c |= (be16toh(inline_read_16(address+1)) << 8);
939 c |= (inline_read_8(address + 3) << 24);
942 uint16_t a = inline_read_16(address);
943 uint16_t b = inline_read_16(address + 2);
944 return (a << 16) | b;
947 static inline int32_t platform_write_check(uint8_t type, uint32_t addr, uint32_t val) {
948 switch (cfg->platform->id) {
951 case 0xEFFFFE: // VIA1?
952 if (val & 0x10 && !ovl) {
954 printf("[MAC] OVL on.\n");
957 printf("[MAC] OVL off.\n");
965 if (ovl != (val & (1 << 0))) {
966 ovl = (val & (1 << 0));
967 printf("OVL:%x\n", ovl);
972 char *serdat = (char *)&val;
973 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
974 // ignore this upper byte as it's not viewable data, only display lower byte.
975 printf("%c", serdat[0]);
980 // This code is kind of strange and should probably be reworked/revoked.
981 if (!(val & 0x8000)) {
986 else if (val & 0x04) {
995 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
996 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
997 handle_piscsi_write(addr, val, type);
1000 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
1001 handle_pinet_write(addr, val, type);
1004 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
1005 rtg_write((addr & 0x0FFFFFFF), val, type);
1008 if (custom_write_amiga(cfg, addr, val, type) != -1) {
1017 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
1018 if (handle_mapped_write(cfg, addr, val, type) != -1) {
1026 void m68k_write_memory_8(unsigned int address, unsigned int value) {
1027 if (platform_write_check(OP_TYPE_BYTE, address, value))
1030 if (address & 0xFF000000)
1033 inline_write_8((uint32_t)address, value);
1037 void m68k_write_memory_16(unsigned int address, unsigned int value) {
1038 if (platform_write_check(OP_TYPE_WORD, address, value))
1041 if (address & 0xFF000000)
1044 if (address & 0x01) {
1045 inline_write_8(value & 0xFF, address);
1046 inline_write_8((value >> 8) & 0xFF, address + 1);
1050 inline_write_16((uint32_t)address, value);
1054 void m68k_write_memory_32(unsigned int address, unsigned int value) {
1055 if (platform_write_check(OP_TYPE_LONGWORD, address, value))
1058 if (address & 0xFF000000)
1061 if (address & 0x01) {
1062 inline_write_8(value & 0xFF, address);
1063 inline_write_16(htobe16(((value >> 8) & 0xFFFF)), address + 1);
1064 inline_write_8((value >> 24), address + 3);
1068 inline_write_16(address, value >> 16);
1069 inline_write_16(address + 2, value);