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* main_windows.cpp - Startup code for Windows
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* Basilisk II (C) 1997-2005 Christian Bauer
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include <SDL_mutex.h>
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#include <SDL_thread.h>
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#include "cpu_emulation.h"
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#include "rom_patches.h"
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#include "prefs_editor.h"
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#include "macos_util.h"
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#include "user_strings.h"
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#include "util_windows.h"
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#include "kernel_windows.h"
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extern void flush_icache_range(uint32 start, uint32 size); // from compemu_support.cpp
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const char ROM_FILE_NAME[] = "ROM";
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const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
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// CPU and FPU type, addressing mode
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bool TwentyFourBitAddressing;
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bool ThirtyThreeBitAddressing = false;
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static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
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static bool xpram_thread_active = false; // Flag: XPRAM watchdog installed
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static volatile bool xpram_thread_cancel = false; // Flag: Cancel XPRAM thread
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static SDL_Thread *xpram_thread = NULL; // XPRAM watchdog
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static bool tick_thread_active = false; // Flag: 60Hz thread installed
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static volatile bool tick_thread_cancel = false; // Flag: Cancel 60Hz thread
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static SDL_Thread *tick_thread; // 60Hz thread
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static SDL_mutex *intflag_lock = NULL; // Mutex to protect InterruptFlags
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#define LOCK_INTFLAGS SDL_LockMutex(intflag_lock)
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#define UNLOCK_INTFLAGS SDL_UnlockMutex(intflag_lock)
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DWORD win_os; // Windows OS id
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DWORD win_os_major; // Windows OS version major
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#if USE_SCRATCHMEM_SUBTERFUGE
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uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
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static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
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static int xpram_func(void *arg);
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static int tick_func(void *arg);
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static void one_tick(...);
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char *strdup(const char *s)
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char *n = (char *)malloc(strlen(s) + 1);
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* Map memory that can be accessed from the Mac side
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void *vm_acquire_mac(size_t size)
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void *m = vm_acquire(size, VM_MAP_DEFAULT | VM_MAP_33BIT);
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ThirtyThreeBitAddressing = false;
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m = vm_acquire(size);
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static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
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// Handle screen fault
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extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
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if (Screen_fault_handler(fault_address, fault_instruction))
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return SIGSEGV_RETURN_SUCCESS;
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#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
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// Ignore writes to ROM
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if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
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return SIGSEGV_RETURN_SKIP_INSTRUCTION;
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// Ignore all other faults, if requested
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if (PrefsFindBool("ignoresegv"))
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return SIGSEGV_RETURN_SKIP_INSTRUCTION;
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return SIGSEGV_RETURN_FAILURE;
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* Dump state when everything went wrong after a SEGV
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static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
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fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
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if (fault_instruction != SIGSEGV_INVALID_PC)
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fprintf(stderr, " [IP=%p]", fault_instruction);
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fprintf(stderr, "\n");
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extern void m68k_dumpstate(uaecptr *nextpc);
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m68k_dumpstate(&nextpc);
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#if USE_JIT && JIT_DEBUG
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extern void compiler_dumpstate(void);
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compiler_dumpstate();
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VideoQuitFullScreen();
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char *arg[4] = {"mon", "-m", "-r", NULL};
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static void usage(const char *prg_name)
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"Usage: %s [OPTION...]\n"
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" --config FILE\n read/write configuration from/to FILE\n"
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" --display STRING\n X display to use\n"
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" --break ADDRESS\n set ROM breakpoint\n"
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" --rominfo\n dump ROM information\n", prg_name
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LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
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int main(int argc, char **argv)
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bool cd_boot = false;
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// Initialize variables
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printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
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printf(" %s\n", GetString(STR_ABOUT_TEXT2));
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// Parse command line arguments
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for (int i=1; i<argc; i++) {
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if (strcmp(argv[i], "--help") == 0) {
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} else if (strcmp(argv[i], "--break") == 0) {
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ROMBreakpoint = strtol(argv[i], NULL, 0);
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} else if (strcmp(argv[i], "--config") == 0) {
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extern string UserPrefsPath; // from prefs_unix.cpp
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UserPrefsPath = argv[i];
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} else if (strcmp(argv[i], "--rominfo") == 0) {
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} else if (strcmp(argv[i], "--cdboot") == 0) {
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// Remove processed arguments
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for (int i=1; i<argc; i++) {
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for (k=i; k<argc; k++)
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for (int j=i+k; j<argc; j++)
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PrefsInit(argc, argv);
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// Boot MacOS from CD-ROM?
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PrefsReplaceInt32("bootdriver", CDROMRefNum);
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// Any command line arguments left?
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for (int i=1; i<argc; i++) {
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if (argv[i][0] == '-') {
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fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
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// Check we are using a Windows NT kernel >= 4.0
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ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
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osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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if (!GetVersionEx(&osvi)) {
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ErrorAlert("Could not determine OS type");
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win_os = osvi.dwPlatformId;
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win_os_major = osvi.dwMajorVersion;
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if (win_os != VER_PLATFORM_WIN32_NT || win_os_major < 4) {
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ErrorAlert(STR_NO_WIN32_NT_4);
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// Check that drivers are installed
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if (!check_drivers())
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// Load win32 libraries
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// Initialize SDL system
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sdl_flags |= SDL_INIT_VIDEO;
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sdl_flags |= SDL_INIT_AUDIO;
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assert(sdl_flags != 0);
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if (SDL_Init(sdl_flags) == -1) {
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sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
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// Init system routines
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// Show preferences editor
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if (!PrefsFindBool("nogui"))
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// Install the handler for SIGSEGV
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if (!sigsegv_install_handler(sigsegv_handler)) {
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sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
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// Register dump state function when we got mad after a segfault
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sigsegv_set_dump_state(sigsegv_dump_state);
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RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
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if (RAMSize < 1024*1024) {
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WarningAlert(GetString(STR_SMALL_RAM_WARN));
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// Initialize VM system
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// Create areas for Mac RAM and ROM
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#ifdef USE_33BIT_ADDRESSING
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// Speculatively enables 33-bit addressing
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ThirtyThreeBitAddressing = true;
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RAMBaseHost = (uint8 *)vm_acquire_mac(RAMSize);
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ROMBaseHost = (uint8 *)vm_acquire_mac(0x100000);
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if (RAMBaseHost == VM_MAP_FAILED || ROMBaseHost == VM_MAP_FAILED) {
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ErrorAlert(STR_NO_MEM_ERR);
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#if USE_SCRATCHMEM_SUBTERFUGE
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// Allocate scratch memory
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ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
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if (ScratchMem == VM_MAP_FAILED) {
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ErrorAlert(STR_NO_MEM_ERR);
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ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
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#if DIRECT_ADDRESSING
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// RAMBaseMac shall always be zero
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MEMBaseDiff = (uintptr)RAMBaseHost;
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ROMBaseMac = Host2MacAddr(ROMBaseHost);
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D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
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D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
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// Get rom file path from preferences
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const char *rom_path = PrefsFindString("rom");
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HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
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FILE_ATTRIBUTE_NORMAL,
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if (rom_fh == INVALID_HANDLE_VALUE) {
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ErrorAlert(STR_NO_ROM_FILE_ERR);
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printf(GetString(STR_READING_ROM_FILE));
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ROMSize = GetFileSize(rom_fh, NULL);
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if (ROMSize != 64*1024 && ROMSize != 128*1024 && ROMSize != 256*1024 && ROMSize != 512*1024 && ROMSize != 1024*1024) {
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ErrorAlert(STR_ROM_SIZE_ERR);
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if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 || bytes_read != ROMSize) {
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ErrorAlert(STR_ROM_FILE_READ_ERR);
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// Initialize native timers
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// Initialize everything
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D(bug("Initialization complete\n"));
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// SDL threads available, start 60Hz thread
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tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
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if (!tick_thread_active) {
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sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
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D(bug("60Hz thread started\n"));
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// Start XPRAM watchdog thread
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memcpy(last_xpram, XPRAM, XPRAM_SIZE);
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xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
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D(bug("XPRAM thread started\n"));
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// Start 68k and jump to ROM boot routine
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D(bug("Starting emulation...\n"));
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void QuitEmulator(void)
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D(bug("QuitEmulator\n"));
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// Exit 680x0 emulation
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if (tick_thread_active) {
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tick_thread_cancel = true;
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SDL_WaitThread(tick_thread, NULL);
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// Stop XPRAM watchdog thread
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if (xpram_thread_active) {
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xpram_thread_cancel = true;
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SDL_WaitThread(xpram_thread, NULL);
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// Deinitialize everything
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// Free ROM/RAM areas
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if (RAMBaseHost != VM_MAP_FAILED) {
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vm_release(RAMBaseHost, RAMSize);
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if (ROMBaseHost != VM_MAP_FAILED) {
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vm_release(ROMBaseHost, 0x100000);
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#if USE_SCRATCHMEM_SUBTERFUGE
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// Delete scratch memory area
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if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
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vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
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// Exit system routines
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// Release win32 libraries
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* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
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* or a dynamically recompiling emulator)
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void FlushCodeCache(void *start, uint32 size)
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flush_icache_range((uintptr)start, size);
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B2_mutex() { m = SDL_CreateMutex(); }
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~B2_mutex() { if (m) SDL_DestroyMutex(m); }
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B2_mutex *B2_create_mutex(void)
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void B2_lock_mutex(B2_mutex *mutex)
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SDL_LockMutex(mutex->m);
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void B2_unlock_mutex(B2_mutex *mutex)
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SDL_UnlockMutex(mutex->m);
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void B2_delete_mutex(B2_mutex *mutex)
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* Interrupt flags (must be handled atomically!)
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uint32 InterruptFlags = 0;
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void SetInterruptFlag(uint32 flag)
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InterruptFlags |= flag;
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void ClearInterruptFlag(uint32 flag)
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InterruptFlags &= ~flag;
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* XPRAM watchdog thread (saves XPRAM every minute)
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static void xpram_watchdog(void)
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if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
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memcpy(last_xpram, XPRAM, XPRAM_SIZE);
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static int xpram_func(void *arg)
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while (!xpram_thread_cancel) {
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for (int i=0; i<60 && !xpram_thread_cancel; i++)
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Delay_usec(999999); // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
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* 60Hz thread (really 60.15Hz)
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static void one_second(void)
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// Pseudo Mac 1Hz interrupt, update local time
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WriteMacInt32(0x20c, TimerDateTime());
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SetInterruptFlag(INTFLAG_1HZ);
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static void one_tick(...)
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static int tick_counter = 0;
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if (++tick_counter > 60) {
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// Trigger 60Hz interrupt
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if (ROMVersion != ROM_VERSION_CLASSIC || HasMacStarted()) {
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SetInterruptFlag(INTFLAG_60HZ);
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static int tick_func(void *arg)
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uint64 start = GetTicks_usec();
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uint64 next = GetTicks_usec();
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while (!tick_thread_cancel) {
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int64 delay = next - GetTicks_usec();
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else if (delay < -16625)
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next = GetTicks_usec();
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uint64 end = GetTicks_usec();
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D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
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* Get the main window handle
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#include <SDL_syswm.h>
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static HWND GetMainWindowHandle(void)
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SDL_SysWMinfo wmInfo;
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wmInfo.version.major = SDL_MAJOR_VERSION;
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wmInfo.version.minor = SDL_MINOR_VERSION;
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wmInfo.version.patch = SDL_PATCHLEVEL;
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return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
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static void display_alert(int title_id, const char *text, int flags)
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HWND hMainWnd = GetMainWindowHandle();
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MessageBox(hMainWnd, text, GetString(title_id), MB_OK | flags);
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* Display error alert
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void ErrorAlert(const char *text)
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if (PrefsFindBool("nogui"))
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VideoQuitFullScreen();
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display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
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* Display warning alert
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void WarningAlert(const char *text)
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if (PrefsFindBool("nogui"))
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display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
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* Display choice alert
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bool ChoiceAlert(const char *text, const char *pos, const char *neg)
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printf(GetString(STR_SHELL_WARNING_PREFIX), text);
added
removed
src/Windows/main_windows.cpp
