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);
119 if (value & (1 << PIN_TXN_IN_PROGRESS))
122 if (!(value & (1 << PIN_IPL_ZERO))) {
147 amiga_reset=(value & (1 << PIN_RESET));
148 if(amiga_reset!=amiga_reset_last)
150 amiga_reset_last=amiga_reset;
153 printf("Amiga Reset is down...\n");
159 printf("Amiga Reset is up...\n");
164 /*if (gayle_ide_enabled) {
165 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
166 //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*/
186 static inline unsigned int inline_read_status_reg() {
187 *(gpio + 7) = (REG_STATUS << PIN_A0);
188 *(gpio + 7) = 1 << PIN_RD;
189 *(gpio + 7) = 1 << PIN_RD;
190 *(gpio + 7) = 1 << PIN_RD;
191 *(gpio + 7) = 1 << PIN_RD;
193 unsigned int value = *(gpio + 13);
195 *(gpio + 10) = 0xffffec;
197 return (value >> 8) & 0xffff;
201 m68ki_cpu_core *state = &m68ki_cpu;
202 m68k_pulse_reset(state);
205 if (mouse_hook_enabled) {
206 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
209 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
210 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
211 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), \
212 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));
213 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), \
214 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));
215 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
218 m68k_execute(state, 1);
221 if (cpu_emulation_running) {
223 m68k_execute(state, 5);
225 m68k_execute(state, loop_cycles);
230 last_irq = ((inline_read_status_reg() & 0xe000) >> 13);
231 if (last_irq != last_last_irq) {
232 last_last_irq = last_irq;
233 M68K_SET_IRQ(last_irq);
235 m68k_execute(state, 50);
237 if (!irq && last_last_irq != 0) {
245 usleep(1000000); // 1sec
247 // while(amiga_reset==0);
248 // printf("CPU emulation reset.\n");
251 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
252 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
253 switch (mouse_extra) {
256 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
260 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
264 // dampen the scroll wheel until next while loop iteration
268 if (load_new_config) {
269 printf("[CPU] Loading new config file.\n");
270 goto stop_cpu_emulation;
274 goto stop_cpu_emulation;
279 printf("[CPU] End of CPU thread\n");
283 void *keyboard_task() {
284 struct pollfd kbdpoll[1];
286 char c = 0, c_code = 0, c_type = 0;
287 char grab_message[] = "[KBD] Grabbing keyboard from input layer\n",
288 ungrab_message[] = "[KBD] Ungrabbing keyboard\n";
290 printf("[KBD] Keyboard thread started\n");
292 // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it
293 if (kb_hook_enabled && cfg->keyboard_grab) {
294 printf(grab_message);
295 grab_device(keyboard_fd);
298 kbdpoll[0].fd = keyboard_fd;
299 kbdpoll[0].events = POLLIN;
302 kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC);
303 if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) {
304 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
305 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
306 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
310 // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents
311 if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) {
315 while (get_key_char(&c, &c_code, &c_type)) {
316 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
318 printf("[KBD] Keyboard hook enabled.\n");
319 if (cfg->keyboard_grab) {
320 grab_device(keyboard_fd);
321 printf(grab_message);
323 } else if (kb_hook_enabled) {
324 if (c == 0x1B && c_type) {
326 printf("[KBD] Keyboard hook disabled.\n");
327 if (cfg->keyboard_grab) {
328 release_device(keyboard_fd);
329 printf(ungrab_message);
332 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
339 // pause pressed; trigger nmi (int level 7)
340 if (c == 0x01 && c_type) {
341 printf("[INT] Sending NMI\n");
345 if (!kb_hook_enabled && c_type) {
346 if (c && c == cfg->mouse_toggle_key) {
347 mouse_hook_enabled ^= 1;
348 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
349 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
352 cpu_emulation_running ^= 1;
353 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
356 realtime_graphics_debug ^= 1;
357 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
361 //m68k_pulse_reset();
362 printf("CPU emulation reset.\n");
365 printf("Quitting and exiting emulator.\n");
370 realtime_disassembly ^= 1;
372 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
375 int r = get_mapped_item_by_address(cfg, 0x08000000);
377 printf("Dumping first 16MB of mapped range %d.\n", r);
378 FILE *dmp = fopen("./memdmp.bin", "wb+");
379 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
383 if (c == 's' && realtime_disassembly) {
386 if (c == 'S' && realtime_disassembly) {
395 printf("[KBD] Keyboard thread ending\n");
396 if (cfg->keyboard_grab) {
397 printf(ungrab_message);
398 release_device(keyboard_fd);
403 void stop_cpu_emulation(uint8_t disasm_cur) {
406 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
407 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), \
408 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));
409 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), \
410 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));
411 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
412 realtime_disassembly = 1;
415 cpu_emulation_running = 0;
420 static volatile unsigned char maprom;
422 void sigint_handler(int sig_num) {
424 //cpu_emulation_running = 0;
427 printf("Received sigint %d, exiting.\n", sig_num);
433 if (cfg->platform->shutdown) {
434 cfg->platform->shutdown(cfg);
437 while (!emulator_exiting) {
438 emulator_exiting = 1;
442 printf("IRQs triggered: %lld\n", trig_irq);
443 printf("IRQs serviced: %lld\n", serv_irq);
448 int main(int argc, char *argv[]) {
453 //const struct sched_param priority = {99};
455 // Some command line switch stuffles
456 for (g = 1; g < argc; g++) {
457 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
459 printf("%s switch found, but no CPU type specified.\n", argv[g]);
462 cpu_type = get_m68k_cpu_type(argv[g]);
465 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
467 printf("%s switch found, but no config filename specified.\n", argv[g]);
470 FILE *chk = fopen(argv[g], "rb");
472 printf("Config file %s does not exist, please check that you've specified the path correctly.\n", argv[g]);
476 set_pistorm_devcfg_filename(argv[g]);
480 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
482 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
485 strcpy(keyboard_file, argv[g]);
493 ps_reset_state_machine();
497 if (load_new_config != 0) {
498 uint8_t config_action = load_new_config - 1;
501 free_config_file(cfg);
506 switch(config_action) {
509 cfg = load_config_file(get_pistorm_devcfg_filename());
512 cfg = load_config_file("default.cfg");
518 printf("No config file specified. Trying to load default.cfg...\n");
519 cfg = load_config_file("default.cfg");
521 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
522 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
524 printf("Failed to allocate memory for emulator config!\n");
527 memset(cfg, 0x00, sizeof(struct emulator_config));
532 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
533 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
536 cfg->platform = make_platform_config("none", "generic");
537 cfg->platform->platform_initial_setup(cfg);
540 if (cfg->mouse_enabled) {
541 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
542 if (mouse_fd == -1) {
543 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
544 cfg->mouse_enabled = 0;
547 * *-*-*-* magic numbers! *-*-*-*
548 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
549 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
550 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
551 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
552 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
554 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
555 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
556 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
557 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
558 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
560 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
564 if (cfg->keyboard_file)
565 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
567 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
569 if (keyboard_fd == -1) {
570 printf("Failed to open keyboard event source.\n");
573 if (cfg->mouse_autoconnect)
574 mouse_hook_enabled = 1;
576 if (cfg->keyboard_autoconnect)
581 signal(SIGINT, sigint_handler);
583 ps_reset_state_machine();
588 printf("Setting CPU type to %d.\n", cpu_type);
589 m68k_set_cpu_type(&m68ki_cpu, cpu_type);
592 pthread_t ipl_tid = 0, cpu_tid, kbd_tid;
595 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
597 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
599 pthread_setname_np(ipl_tid, "pistorm: ipl");
600 printf("IPL thread created successfully\n");
604 // create keyboard task
605 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
607 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
609 pthread_setname_np(kbd_tid, "pistorm: kbd");
610 printf("[MAIN] Keyboard thread created successfully\n");
614 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
616 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
618 pthread_setname_np(cpu_tid, "pistorm: cpu");
619 printf("[MAIN] CPU thread created successfully\n");
622 // wait for cpu task to end before closing up and finishing
623 pthread_join(cpu_tid, NULL);
625 while (!emulator_exiting) {
626 emulator_exiting = 1;
630 if (load_new_config == 0)
631 printf("[MAIN] All threads appear to have concluded; ending process\n");
638 if (load_new_config != 0)
641 if (cfg->platform->shutdown) {
642 cfg->platform->shutdown(cfg);
648 void cpu_pulse_reset(void) {
649 m68ki_cpu_core *state = &m68ki_cpu;
653 if (cfg->platform->handle_reset)
654 cfg->platform->handle_reset(cfg);
656 m68k_pulse_reset(state);
659 int cpu_irq_ack(int level) {
660 printf("cpu irq ack\n");
664 static unsigned int target = 0;
665 static uint8_t send_keypress = 0;
666 static uint32_t platform_res, rres;
668 uint8_t cdtv_dmac_reg_idx_read();
669 void cdtv_dmac_reg_idx_write(uint8_t value);
670 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
671 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
673 static inline void inline_write_16(unsigned int address, unsigned int data) {
674 *(gpio + 0) = GPFSEL0_OUTPUT;
675 *(gpio + 1) = GPFSEL1_OUTPUT;
676 *(gpio + 2) = GPFSEL2_OUTPUT;
678 *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0);
679 *(gpio + 7) = 1 << PIN_WR;
680 *(gpio + 10) = 1 << PIN_WR;
681 *(gpio + 10) = 0xffffec;
683 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
684 *(gpio + 7) = 1 << PIN_WR;
685 *(gpio + 10) = 1 << PIN_WR;
686 *(gpio + 10) = 0xffffec;
688 *(gpio + 7) = ((0x0000 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
689 *(gpio + 7) = 1 << PIN_WR;
690 *(gpio + 10) = 1 << PIN_WR;
691 *(gpio + 10) = 0xffffec;
693 *(gpio + 0) = GPFSEL0_INPUT;
694 *(gpio + 1) = GPFSEL1_INPUT;
695 *(gpio + 2) = GPFSEL2_INPUT;
697 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
700 static inline void inline_write_8(unsigned int address, unsigned int data) {
701 if ((address & 1) == 0)
702 data = data + (data << 8); // EVEN, A0=0,UDS
704 data = data & 0xff; // ODD , A0=1,LDS
706 *(gpio + 0) = GPFSEL0_OUTPUT;
707 *(gpio + 1) = GPFSEL1_OUTPUT;
708 *(gpio + 2) = GPFSEL2_OUTPUT;
710 *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0);
711 *(gpio + 7) = 1 << PIN_WR;
712 *(gpio + 10) = 1 << PIN_WR;
713 *(gpio + 10) = 0xffffec;
715 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
716 *(gpio + 7) = 1 << PIN_WR;
717 *(gpio + 10) = 1 << PIN_WR;
718 *(gpio + 10) = 0xffffec;
720 *(gpio + 7) = ((0x0100 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
721 *(gpio + 7) = 1 << PIN_WR;
722 *(gpio + 10) = 1 << PIN_WR;
723 *(gpio + 10) = 0xffffec;
725 *(gpio + 0) = GPFSEL0_INPUT;
726 *(gpio + 1) = GPFSEL1_INPUT;
727 *(gpio + 2) = GPFSEL2_INPUT;
729 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
732 static inline void inline_write_32(unsigned int address, unsigned int value) {
733 inline_write_16(address, value >> 16);
734 inline_write_16(address + 2, value);
737 static inline unsigned int inline_read_16(unsigned int address) {
738 *(gpio + 0) = GPFSEL0_OUTPUT;
739 *(gpio + 1) = GPFSEL1_OUTPUT;
740 *(gpio + 2) = GPFSEL2_OUTPUT;
742 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
743 *(gpio + 7) = 1 << PIN_WR;
744 *(gpio + 10) = 1 << PIN_WR;
745 *(gpio + 10) = 0xffffec;
747 *(gpio + 7) = ((0x0200 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
748 *(gpio + 7) = 1 << PIN_WR;
749 *(gpio + 10) = 1 << PIN_WR;
750 *(gpio + 10) = 0xffffec;
752 *(gpio + 0) = GPFSEL0_INPUT;
753 *(gpio + 1) = GPFSEL1_INPUT;
754 *(gpio + 2) = GPFSEL2_INPUT;
756 *(gpio + 7) = (REG_DATA << PIN_A0);
757 *(gpio + 7) = 1 << PIN_RD;
759 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
760 unsigned int value = *(gpio + 13);
762 *(gpio + 10) = 0xffffec;
764 return (value >> 8) & 0xffff;
767 static inline unsigned int inline_read_8(unsigned int address) {
768 *(gpio + 0) = GPFSEL0_OUTPUT;
769 *(gpio + 1) = GPFSEL1_OUTPUT;
770 *(gpio + 2) = GPFSEL2_OUTPUT;
772 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
773 *(gpio + 7) = 1 << PIN_WR;
774 *(gpio + 10) = 1 << PIN_WR;
775 *(gpio + 10) = 0xffffec;
777 *(gpio + 7) = ((0x0300 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
778 *(gpio + 7) = 1 << PIN_WR;
779 *(gpio + 10) = 1 << PIN_WR;
780 *(gpio + 10) = 0xffffec;
782 *(gpio + 0) = GPFSEL0_INPUT;
783 *(gpio + 1) = GPFSEL1_INPUT;
784 *(gpio + 2) = GPFSEL2_INPUT;
786 *(gpio + 7) = (REG_DATA << PIN_A0);
787 *(gpio + 7) = 1 << PIN_RD;
789 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
790 unsigned int value = *(gpio + 13);
792 *(gpio + 10) = 0xffffec;
794 value = (value >> 8) & 0xffff;
796 if ((address & 1) == 0)
797 return (value >> 8) & 0xff; // EVEN, A0=0,UDS
799 return value & 0xff; // ODD , A0=1,LDS
802 static inline unsigned int inline_read_32(unsigned int address) {
803 unsigned int a = inline_read_16(address);
804 unsigned int b = inline_read_16(address + 2);
805 return (a << 16) | b;
808 static inline uint32_t ps_read(uint8_t type, uint32_t addr) {
811 return inline_read_8(addr);
813 return inline_read_16(addr);
814 case OP_TYPE_LONGWORD:
815 return inline_read_32(addr);
817 // This shouldn't actually happen.
821 static inline int32_t platform_read_check(uint8_t type, uint32_t addr, uint32_t *res) {
822 switch (cfg->platform->id) {
826 if (mouse_hook_enabled && (mouse_buttons & 0x01)) {
827 rres = (uint32_t)ps_read(type, addr);
828 *res = (rres ^ 0x40);
834 if (kb_hook_enabled) {
835 rres = (uint32_t)ps_read(type, addr);
836 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
841 if (send_keypress == 2) {
850 if (kb_hook_enabled) {
851 rres = (uint32_t)ps_read(type, addr);
852 uint8_t c = 0, t = 0;
853 pop_queued_key(&c, &t);
855 rres = ((c << 1) | t) ^ 0xFF;
863 if (mouse_hook_enabled) {
864 unsigned short result = (mouse_dy << 8) | (mouse_dx);
865 *res = (unsigned int)result;
871 if (mouse_hook_enabled) {
872 unsigned short result = (unsigned short)ps_read(type, addr);
873 // bit 1 rmb, bit 2 mmb
874 if (mouse_buttons & 0x06) {
875 *res = (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
876 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
879 *res = (unsigned int)(result & 0xfffd);
888 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
889 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
890 *res = handle_piscsi_read(addr, type);
893 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
894 *res = handle_pinet_read(addr, type);
897 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
898 *res = rtg_read((addr & 0x0FFFFFFF), type);
901 if (custom_read_amiga(cfg, addr, &target, type) != -1) {
911 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
912 if (handle_mapped_read(cfg, addr, &target, type) != -1) {
921 unsigned int m68k_read_memory_8(unsigned int address) {
922 if (platform_read_check(OP_TYPE_BYTE, address, &platform_res)) {
926 if (address & 0xFF000000)
929 return (unsigned int)inline_read_8((uint32_t)address);
932 unsigned int m68k_read_memory_16(unsigned int address) {
933 if (platform_read_check(OP_TYPE_WORD, address, &platform_res)) {
937 if (address & 0xFF000000)
940 if (address & 0x01) {
941 return ((inline_read_8(address) << 8) | inline_read_8(address + 1));
943 return (unsigned int)inline_read_16((uint32_t)address);
946 unsigned int m68k_read_memory_32(unsigned int address) {
947 if (platform_read_check(OP_TYPE_LONGWORD, address, &platform_res)) {
951 if (address & 0xFF000000)
954 if (address & 0x01) {
955 uint32_t c = inline_read_8(address);
956 c |= (be16toh(inline_read_16(address+1)) << 8);
957 c |= (inline_read_8(address + 3) << 24);
960 uint16_t a = inline_read_16(address);
961 uint16_t b = inline_read_16(address + 2);
962 return (a << 16) | b;
965 static inline int32_t platform_write_check(uint8_t type, uint32_t addr, uint32_t val) {
966 switch (cfg->platform->id) {
969 case 0xEFFFFE: // VIA1?
970 if (val & 0x10 && !ovl) {
972 printf("[MAC] OVL on.\n");
973 handle_ovl_mappings_mac68k(cfg);
976 printf("[MAC] OVL off.\n");
977 handle_ovl_mappings_mac68k(cfg);
985 if (ovl != (val & (1 << 0))) {
986 ovl = (val & (1 << 0));
987 printf("OVL:%x\n", ovl);
992 char *serdat = (char *)&val;
993 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
994 // ignore this upper byte as it's not viewable data, only display lower byte.
995 printf("%c", serdat[0]);
1000 // This code is kind of strange and should probably be reworked/revoked.
1001 if (!(val & 0x8000)) {
1006 else if (val & 0x04) {
1015 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
1016 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
1017 handle_piscsi_write(addr, val, type);
1020 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
1021 handle_pinet_write(addr, val, type);
1024 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
1025 rtg_write((addr & 0x0FFFFFFF), val, type);
1028 if (custom_write_amiga(cfg, addr, val, type) != -1) {
1037 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
1038 if (handle_mapped_write(cfg, addr, val, type) != -1) {
1046 void m68k_write_memory_8(unsigned int address, unsigned int value) {
1047 if (platform_write_check(OP_TYPE_BYTE, address, value))
1050 if (address & 0xFF000000)
1053 inline_write_8((uint32_t)address, value);
1057 void m68k_write_memory_16(unsigned int address, unsigned int value) {
1058 if (platform_write_check(OP_TYPE_WORD, address, value))
1061 if (address & 0xFF000000)
1064 if (address & 0x01) {
1065 inline_write_8(value & 0xFF, address);
1066 inline_write_8((value >> 8) & 0xFF, address + 1);
1070 inline_write_16((uint32_t)address, value);
1074 void m68k_write_memory_32(unsigned int address, unsigned int value) {
1075 if (platform_write_check(OP_TYPE_LONGWORD, address, value))
1078 if (address & 0xFF000000)
1081 if (address & 0x01) {
1082 inline_write_8(value & 0xFF, address);
1083 inline_write_16(htobe16(((value >> 8) & 0xFFFF)), address + 1);
1084 inline_write_8((value >> 24), address + 3);
1088 inline_write_16(address, value >> 16);
1089 inline_write_16(address + 2, value);