| 1 |
/* |
| 2 |
* main_amiga.cpp - Startup code for AmigaOS |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2000 Christian Bauer |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#include <exec/types.h> |
| 22 |
#include <exec/execbase.h> |
| 23 |
#include <exec/memory.h> |
| 24 |
#include <exec/tasks.h> |
| 25 |
#include <dos/dostags.h> |
| 26 |
#include <intuition/intuition.h> |
| 27 |
#include <devices/timer.h> |
| 28 |
#include <devices/ahi.h> |
| 29 |
#include <proto/exec.h> |
| 30 |
#include <proto/dos.h> |
| 31 |
#include <proto/intuition.h> |
| 32 |
|
| 33 |
#include "sysdeps.h" |
| 34 |
#include "cpu_emulation.h" |
| 35 |
#include "main.h" |
| 36 |
#include "xpram.h" |
| 37 |
#include "timer.h" |
| 38 |
#include "sony.h" |
| 39 |
#include "disk.h" |
| 40 |
#include "cdrom.h" |
| 41 |
#include "scsi.h" |
| 42 |
#include "audio.h" |
| 43 |
#include "video.h" |
| 44 |
#include "serial.h" |
| 45 |
#include "ether.h" |
| 46 |
#include "clip.h" |
| 47 |
#include "emul_op.h" |
| 48 |
#include "rom_patches.h" |
| 49 |
#include "prefs.h" |
| 50 |
#include "prefs_editor.h" |
| 51 |
#include "sys.h" |
| 52 |
#include "user_strings.h" |
| 53 |
#include "version.h" |
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|
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#define DEBUG 0 |
| 56 |
#include "debug.h" |
| 57 |
|
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|
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// Options for libnix |
| 60 |
unsigned long __stack = 0x4000; // Stack requirement |
| 61 |
int __nocommandline = 1; // Disable command line parsing |
| 62 |
|
| 63 |
|
| 64 |
// Constants |
| 65 |
static const char ROM_FILE_NAME[] = "ROM"; |
| 66 |
static const char __ver[] = "$VER: " VERSION_STRING " " __DATE__; |
| 67 |
static const int SCRATCH_MEM_SIZE = 65536; |
| 68 |
|
| 69 |
|
| 70 |
// RAM and ROM pointers |
| 71 |
uint32 RAMBaseMac; // RAM base (Mac address space) |
| 72 |
uint8 *RAMBaseHost; // RAM base (host address space) |
| 73 |
uint32 RAMSize; // Size of RAM |
| 74 |
uint32 ROMBaseMac; // ROM base (Mac address space) |
| 75 |
uint8 *ROMBaseHost; // ROM base (host address space) |
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uint32 ROMSize; // Size of ROM |
| 77 |
|
| 78 |
uint32 MacsBugFlags = 0xbff; |
| 79 |
|
| 80 |
|
| 81 |
// CPU and FPU type, addressing mode |
| 82 |
int CPUType; |
| 83 |
bool CPUIs68060; |
| 84 |
int FPUType; |
| 85 |
bool TwentyFourBitAddressing; |
| 86 |
|
| 87 |
|
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// Global variables |
| 89 |
extern ExecBase *SysBase; |
| 90 |
struct Library *GfxBase = NULL; |
| 91 |
struct IntuitionBase *IntuitionBase = NULL; |
| 92 |
struct Library *GadToolsBase = NULL; |
| 93 |
struct Library *IFFParseBase = NULL; |
| 94 |
struct Library *AslBase = NULL; |
| 95 |
struct Library *P96Base = NULL; |
| 96 |
struct Library *CyberGfxBase = NULL; |
| 97 |
struct Library *TimerBase = NULL; |
| 98 |
struct Library *AHIBase = NULL; |
| 99 |
struct Library *DiskBase = NULL; |
| 100 |
|
| 101 |
struct Task *MainTask; // Our task |
| 102 |
uint32 ScratchMem = NULL; // Scratch memory for Mac ROM writes |
| 103 |
APTR OldTrapHandler = NULL; // Old trap handler |
| 104 |
APTR OldExceptionHandler = NULL; // Old exception handler |
| 105 |
BYTE IRQSig = -1; // "Interrupt" signal number |
| 106 |
ULONG IRQSigMask = 0; // "Interrupt" signal mask |
| 107 |
|
| 108 |
static struct timerequest *timereq = NULL; // IORequest for timer |
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|
| 110 |
static struct MsgPort *ahi_port = NULL; // Port for AHI |
| 111 |
static struct AHIRequest *ahi_io = NULL; // IORequest for AHI |
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|
| 113 |
static struct Process *tick_proc = NULL; // 60Hz process |
| 114 |
static volatile bool tick_proc_active = true; // Flag for quitting the 60Hz process |
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|
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static bool stack_swapped = false; // Stack swapping |
| 117 |
static StackSwapStruct stack_swap; |
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|
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|
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// Assembly functions |
| 121 |
struct trap_regs; |
| 122 |
extern "C" void AtomicAnd(uint32 *p, uint32 val); |
| 123 |
extern "C" void AtomicOr(uint32 *p, uint32 val); |
| 124 |
extern "C" void MoveVBR(void); |
| 125 |
extern "C" void TrapHandlerAsm(void); |
| 126 |
extern "C" void ExceptionHandlerAsm(void); |
| 127 |
extern "C" void IllInstrHandler(trap_regs *regs); |
| 128 |
extern "C" void PrivViolHandler(trap_regs *regs); |
| 129 |
extern "C" void quit_emulator(void); |
| 130 |
uint16 EmulatedSR; // Emulated SR (supervisor bit and interrupt mask) |
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|
| 132 |
|
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// Prototypes |
| 134 |
static void jump_to_rom(void); |
| 135 |
static void tick_func(void); |
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|
| 137 |
|
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/* |
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* Main program |
| 140 |
*/ |
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|
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int main(void) |
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{ |
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// Initialize variables |
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RAMBaseHost = NULL; |
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ROMBaseHost = NULL; |
| 147 |
MainTask = FindTask(NULL); |
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struct DateStamp ds; |
| 149 |
DateStamp(&ds); |
| 150 |
srand(ds.ds_Tick); |
| 151 |
|
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// Print some info |
| 153 |
printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR); |
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printf(" %s\n", GetString(STR_ABOUT_TEXT2)); |
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|
| 156 |
// Open libraries |
| 157 |
GfxBase = OpenLibrary((UBYTE *)"graphics.library", 39); |
| 158 |
if (GfxBase == NULL) { |
| 159 |
printf("Cannot open graphics.library V39.\n"); |
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exit(1); |
| 161 |
} |
| 162 |
IntuitionBase = (struct IntuitionBase *)OpenLibrary((UBYTE *)"intuition.library", 39); |
| 163 |
if (IntuitionBase == NULL) { |
| 164 |
printf("Cannot open intuition.library V39.\n"); |
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CloseLibrary(GfxBase); |
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exit(1); |
| 167 |
} |
| 168 |
DiskBase = (struct Library *)OpenResource((UBYTE *)"disk.resource"); |
| 169 |
if (DiskBase == NULL) |
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QuitEmulator(); |
| 171 |
GadToolsBase = OpenLibrary((UBYTE *)"gadtools.library", 39); |
| 172 |
if (GadToolsBase == NULL) { |
| 173 |
ErrorAlert(GetString(STR_NO_GADTOOLS_LIB_ERR)); |
| 174 |
QuitEmulator(); |
| 175 |
} |
| 176 |
IFFParseBase = OpenLibrary((UBYTE *)"iffparse.library", 39); |
| 177 |
if (IFFParseBase == NULL) { |
| 178 |
ErrorAlert(GetString(STR_NO_IFFPARSE_LIB_ERR)); |
| 179 |
QuitEmulator(); |
| 180 |
} |
| 181 |
AslBase = OpenLibrary((UBYTE *)"asl.library", 36); |
| 182 |
if (AslBase == NULL) { |
| 183 |
ErrorAlert(GetString(STR_NO_ASL_LIB_ERR)); |
| 184 |
QuitEmulator(); |
| 185 |
} |
| 186 |
|
| 187 |
// These two can fail (the respective gfx support won't be available, then) |
| 188 |
P96Base = OpenLibrary((UBYTE *)"Picasso96API.library", 2); |
| 189 |
CyberGfxBase = OpenLibrary((UBYTE *)"cybergraphics.library", 2); |
| 190 |
|
| 191 |
// Read preferences |
| 192 |
PrefsInit(); |
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|
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// Open AHI |
| 195 |
ahi_port = CreateMsgPort(); |
| 196 |
if (ahi_port) { |
| 197 |
ahi_io = (struct AHIRequest *)CreateIORequest(ahi_port, sizeof(struct AHIRequest)); |
| 198 |
if (ahi_io) { |
| 199 |
ahi_io->ahir_Version = 2; |
| 200 |
if (OpenDevice((UBYTE *)AHINAME, AHI_NO_UNIT, (struct IORequest *)ahi_io, 0) == 0) { |
| 201 |
AHIBase = (struct Library *)ahi_io->ahir_Std.io_Device; |
| 202 |
} |
| 203 |
} |
| 204 |
} |
| 205 |
|
| 206 |
// Init system routines |
| 207 |
SysInit(); |
| 208 |
|
| 209 |
// Show preferences editor |
| 210 |
if (!PrefsFindBool("nogui")) |
| 211 |
if (!PrefsEditor()) |
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QuitEmulator(); |
| 213 |
|
| 214 |
// Check start of Chip memory (because we need access to 0x0000..0x2000) |
| 215 |
if ((uint32)FindName(&SysBase->MemList, (UBYTE *)"chip memory") < 0x2000) { |
| 216 |
ErrorAlert(GetString(STR_NO_PREPARE_EMUL_ERR)); |
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QuitEmulator(); |
| 218 |
} |
| 219 |
|
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// Open timer.device |
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timereq = (struct timerequest *)AllocVec(sizeof(timerequest), MEMF_PUBLIC | MEMF_CLEAR); |
| 222 |
if (timereq == NULL) { |
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ErrorAlert(GetString(STR_NO_MEM_ERR)); |
| 224 |
QuitEmulator(); |
| 225 |
} |
| 226 |
if (OpenDevice((UBYTE *)TIMERNAME, UNIT_MICROHZ, (struct IORequest *)timereq, 0)) { |
| 227 |
ErrorAlert(GetString(STR_NO_TIMER_DEV_ERR)); |
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QuitEmulator(); |
| 229 |
} |
| 230 |
TimerBase = (struct Library *)timereq->tr_node.io_Device; |
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|
| 232 |
// Allocate scratch memory |
| 233 |
ScratchMem = (uint32)AllocMem(SCRATCH_MEM_SIZE, MEMF_PUBLIC); |
| 234 |
if (ScratchMem == NULL) { |
| 235 |
ErrorAlert(GetString(STR_NO_MEM_ERR)); |
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QuitEmulator(); |
| 237 |
} |
| 238 |
ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block |
| 239 |
|
| 240 |
// Create area for Mac RAM and ROM (ROM must be higher in memory, |
| 241 |
// so we allocate one big chunk and put the ROM at the top of it) |
| 242 |
RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary |
| 243 |
if (RAMSize < 1024*1024) { |
| 244 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
| 245 |
RAMSize = 1024*1024; |
| 246 |
} |
| 247 |
RAMBaseHost = (uint8 *)AllocVec(RAMSize + 0x100000, MEMF_PUBLIC); |
| 248 |
// if (RAMBaseHost == NULL) { |
| 249 |
// ErrorAlert(GetString(STR_NO_MEM_ERR)); |
| 250 |
// QuitEmulator(); |
| 251 |
// } |
| 252 |
if (RAMBaseHost == NULL) |
| 253 |
{ |
| 254 |
uint32 newRAMSize = AvailMem(MEMF_LARGEST) - 0x100000; |
| 255 |
char xText[120]; |
| 256 |
|
| 257 |
sprintf(xText, GetString(STR_NOT_ENOUGH_MEM_WARN), RAMSize, newRAMSize); |
| 258 |
|
| 259 |
if (1 != ChoiceAlert(xText, "Use", "Quit")) |
| 260 |
QuitEmulator(); |
| 261 |
|
| 262 |
RAMSize = newRAMSize; |
| 263 |
RAMBaseHost = (uint8 *)AllocVec(RAMSize + 0x100000, MEMF_PUBLIC); |
| 264 |
if (RAMBaseHost == NULL) { |
| 265 |
ErrorAlert(GetString(STR_NO_MEM_ERR)); |
| 266 |
QuitEmulator(); |
| 267 |
} |
| 268 |
} |
| 269 |
RAMBaseMac = (uint32)RAMBaseHost; |
| 270 |
D(bug("Mac RAM starts at %08lx\n", RAMBaseHost)); |
| 271 |
ROMBaseHost = RAMBaseHost + RAMSize; |
| 272 |
ROMBaseMac = (uint32)ROMBaseHost; |
| 273 |
D(bug("Mac ROM starts at %08lx\n", ROMBaseHost)); |
| 274 |
|
| 275 |
// Get rom file path from preferences |
| 276 |
const char *rom_path = PrefsFindString("rom"); |
| 277 |
|
| 278 |
// Load Mac ROM |
| 279 |
BPTR rom_fh = Open(rom_path ? (char *)rom_path : (char *)ROM_FILE_NAME, MODE_OLDFILE); |
| 280 |
if (rom_fh == NULL) { |
| 281 |
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR)); |
| 282 |
QuitEmulator(); |
| 283 |
} |
| 284 |
printf(GetString(STR_READING_ROM_FILE)); |
| 285 |
Seek(rom_fh, 0, OFFSET_END); |
| 286 |
ROMSize = Seek(rom_fh, 0, OFFSET_CURRENT); |
| 287 |
if (ROMSize != 512*1024 && ROMSize != 1024*1024) { |
| 288 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 289 |
Close(rom_fh); |
| 290 |
QuitEmulator(); |
| 291 |
} |
| 292 |
Seek(rom_fh, 0, OFFSET_BEGINNING); |
| 293 |
if (Read(rom_fh, ROMBaseHost, ROMSize) != ROMSize) { |
| 294 |
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR)); |
| 295 |
Close(rom_fh); |
| 296 |
QuitEmulator(); |
| 297 |
} |
| 298 |
|
| 299 |
// Set CPU and FPU type |
| 300 |
UWORD attn = SysBase->AttnFlags; |
| 301 |
CPUType = attn & AFF_68040 ? 4 : (attn & AFF_68030 ? 3 : 2); |
| 302 |
CPUIs68060 = attn & AFF_68060; |
| 303 |
FPUType = attn & AFF_68881 ? 1 : 0; |
| 304 |
|
| 305 |
// Initialize everything |
| 306 |
if (!InitAll()) |
| 307 |
QuitEmulator(); |
| 308 |
|
| 309 |
// Move VBR away from 0 if neccessary |
| 310 |
MoveVBR(); |
| 311 |
|
| 312 |
// Install trap handler |
| 313 |
EmulatedSR = 0x2700; |
| 314 |
OldTrapHandler = MainTask->tc_TrapCode; |
| 315 |
MainTask->tc_TrapCode = (APTR)TrapHandlerAsm; |
| 316 |
|
| 317 |
// Allocate signal for interrupt emulation and install exception handler |
| 318 |
IRQSig = AllocSignal(-1); |
| 319 |
IRQSigMask = 1 << IRQSig; |
| 320 |
OldExceptionHandler = MainTask->tc_ExceptCode; |
| 321 |
MainTask->tc_ExceptCode = (APTR)ExceptionHandlerAsm; |
| 322 |
SetExcept(SIGBREAKF_CTRL_C | IRQSigMask, SIGBREAKF_CTRL_C | IRQSigMask); |
| 323 |
|
| 324 |
// Start 60Hz process |
| 325 |
tick_proc = CreateNewProcTags( |
| 326 |
NP_Entry, (ULONG)tick_func, |
| 327 |
NP_Name, (ULONG)"Basilisk II 60Hz", |
| 328 |
NP_Priority, 5, |
| 329 |
TAG_END |
| 330 |
); |
| 331 |
|
| 332 |
// Set task priority to -1 so we don't use all processing time |
| 333 |
SetTaskPri(MainTask, -1); |
| 334 |
|
| 335 |
WriteMacInt32(MacsBugFlags, 0); |
| 336 |
|
| 337 |
// Swap stack to Mac RAM area |
| 338 |
stack_swap.stk_Lower = RAMBaseHost; |
| 339 |
stack_swap.stk_Upper = (ULONG)RAMBaseHost + RAMSize; |
| 340 |
stack_swap.stk_Pointer = RAMBaseHost + 0x8000; |
| 341 |
StackSwap(&stack_swap); |
| 342 |
stack_swapped = true; |
| 343 |
|
| 344 |
// Jump to ROM boot routine |
| 345 |
Start680x0(); |
| 346 |
|
| 347 |
QuitEmulator(); |
| 348 |
return 0; |
| 349 |
} |
| 350 |
|
| 351 |
void Start680x0(void) |
| 352 |
{ |
| 353 |
typedef void (*rom_func)(void); |
| 354 |
rom_func fp = (rom_func)(ROMBaseHost + 0x2a); |
| 355 |
fp(); |
| 356 |
} |
| 357 |
|
| 358 |
|
| 359 |
/* |
| 360 |
* Quit emulator (__saveds because it might be called from an exception) |
| 361 |
*/ |
| 362 |
|
| 363 |
// Assembly entry point |
| 364 |
void __saveds quit_emulator(void) |
| 365 |
{ |
| 366 |
QuitEmulator(); |
| 367 |
} |
| 368 |
|
| 369 |
void QuitEmulator(void) |
| 370 |
{ |
| 371 |
// Stop 60Hz thread |
| 372 |
if (tick_proc) { |
| 373 |
SetSignal(0, SIGF_SINGLE); |
| 374 |
tick_proc_active = false; |
| 375 |
Wait(SIGF_SINGLE); |
| 376 |
} |
| 377 |
|
| 378 |
// Restore stack |
| 379 |
if (stack_swapped) { |
| 380 |
stack_swapped = false; |
| 381 |
StackSwap(&stack_swap); |
| 382 |
} |
| 383 |
|
| 384 |
// Remove exception handler |
| 385 |
if (IRQSig >= 0) { |
| 386 |
SetExcept(0, SIGBREAKF_CTRL_C | IRQSigMask); |
| 387 |
MainTask->tc_ExceptCode = OldExceptionHandler; |
| 388 |
FreeSignal(IRQSig); |
| 389 |
} |
| 390 |
|
| 391 |
// Remove trap handler |
| 392 |
MainTask->tc_TrapCode = OldTrapHandler; |
| 393 |
|
| 394 |
// Deinitialize everything |
| 395 |
ExitAll(); |
| 396 |
|
| 397 |
// Delete RAM/ROM area |
| 398 |
if (RAMBaseHost) |
| 399 |
FreeVec(RAMBaseHost); |
| 400 |
|
| 401 |
// Delete scratch memory area |
| 402 |
if (ScratchMem) |
| 403 |
FreeMem((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE); |
| 404 |
|
| 405 |
// Close timer.device |
| 406 |
if (TimerBase) |
| 407 |
CloseDevice((struct IORequest *)timereq); |
| 408 |
if (timereq) |
| 409 |
FreeVec(timereq); |
| 410 |
|
| 411 |
// Exit system routines |
| 412 |
SysExit(); |
| 413 |
|
| 414 |
// Close AHI |
| 415 |
if (AHIBase) |
| 416 |
CloseDevice((struct IORequest *)ahi_io); |
| 417 |
if (ahi_io) |
| 418 |
DeleteIORequest((struct IORequest *)ahi_io); |
| 419 |
if (ahi_port) |
| 420 |
DeleteMsgPort(ahi_port); |
| 421 |
|
| 422 |
// Exit preferences |
| 423 |
PrefsExit(); |
| 424 |
|
| 425 |
// Close libraries |
| 426 |
if (CyberGfxBase) |
| 427 |
CloseLibrary(CyberGfxBase); |
| 428 |
if (P96Base) |
| 429 |
CloseLibrary(P96Base); |
| 430 |
if (AslBase) |
| 431 |
CloseLibrary(AslBase); |
| 432 |
if (IFFParseBase) |
| 433 |
CloseLibrary(IFFParseBase); |
| 434 |
if (GadToolsBase) |
| 435 |
CloseLibrary(GadToolsBase); |
| 436 |
if (IntuitionBase) |
| 437 |
CloseLibrary((struct Library *)IntuitionBase); |
| 438 |
if (GfxBase) |
| 439 |
CloseLibrary(GfxBase); |
| 440 |
|
| 441 |
exit(0); |
| 442 |
} |
| 443 |
|
| 444 |
|
| 445 |
/* |
| 446 |
* Code was patched, flush caches if neccessary (i.e. when using a real 680x0 |
| 447 |
* or a dynamically recompiling emulator) |
| 448 |
*/ |
| 449 |
|
| 450 |
void FlushCodeCache(void *start, uint32 size) |
| 451 |
{ |
| 452 |
CacheClearE(start, size, CACRF_ClearI | CACRF_ClearD); |
| 453 |
} |
| 454 |
|
| 455 |
|
| 456 |
/* |
| 457 |
* Interrupt flags (must be handled atomically!) |
| 458 |
*/ |
| 459 |
|
| 460 |
uint32 InterruptFlags; |
| 461 |
|
| 462 |
void SetInterruptFlag(uint32 flag) |
| 463 |
{ |
| 464 |
AtomicOr(&InterruptFlags, flag); |
| 465 |
} |
| 466 |
|
| 467 |
void ClearInterruptFlag(uint32 flag) |
| 468 |
{ |
| 469 |
AtomicAnd(&InterruptFlags, ~flag); |
| 470 |
} |
| 471 |
|
| 472 |
void TriggerInterrupt(void) |
| 473 |
{ |
| 474 |
Signal(MainTask, IRQSigMask); |
| 475 |
} |
| 476 |
|
| 477 |
void TriggerNMI(void) |
| 478 |
{ |
| 479 |
AsmTriggerNMI(); |
| 480 |
} |
| 481 |
|
| 482 |
|
| 483 |
/* |
| 484 |
* 60Hz thread |
| 485 |
*/ |
| 486 |
|
| 487 |
static __saveds void tick_func(void) |
| 488 |
{ |
| 489 |
int tick_counter = 0; |
| 490 |
struct MsgPort *timer_port = NULL; |
| 491 |
struct timerequest *timer_io = NULL; |
| 492 |
ULONG timer_mask = 0; |
| 493 |
|
| 494 |
// Start 60Hz timer |
| 495 |
timer_port = CreateMsgPort(); |
| 496 |
if (timer_port) { |
| 497 |
timer_io = (struct timerequest *)CreateIORequest(timer_port, sizeof(struct timerequest)); |
| 498 |
if (timer_io) { |
| 499 |
if (!OpenDevice((UBYTE *)TIMERNAME, UNIT_MICROHZ, (struct IORequest *)timer_io, 0)) { |
| 500 |
timer_mask = 1 << timer_port->mp_SigBit; |
| 501 |
timer_io->tr_node.io_Command = TR_ADDREQUEST; |
| 502 |
timer_io->tr_time.tv_secs = 0; |
| 503 |
timer_io->tr_time.tv_micro = 16625; |
| 504 |
SendIO((struct IORequest *)timer_io); |
| 505 |
} |
| 506 |
} |
| 507 |
} |
| 508 |
|
| 509 |
while (tick_proc_active) { |
| 510 |
|
| 511 |
// Wait for timer tick |
| 512 |
Wait(timer_mask); |
| 513 |
|
| 514 |
// Restart timer |
| 515 |
timer_io->tr_node.io_Command = TR_ADDREQUEST; |
| 516 |
timer_io->tr_time.tv_secs = 0; |
| 517 |
timer_io->tr_time.tv_micro = 16625; |
| 518 |
SendIO((struct IORequest *)timer_io); |
| 519 |
|
| 520 |
// Pseudo Mac 1Hz interrupt, update local time |
| 521 |
if (++tick_counter > 60) { |
| 522 |
tick_counter = 0; |
| 523 |
WriteMacInt32(0x20c, TimerDateTime()); |
| 524 |
SetInterruptFlag(INTFLAG_1HZ); |
| 525 |
TriggerInterrupt(); |
| 526 |
} |
| 527 |
|
| 528 |
// Trigger 60Hz interrupt |
| 529 |
SetInterruptFlag(INTFLAG_60HZ); |
| 530 |
TriggerInterrupt(); |
| 531 |
} |
| 532 |
|
| 533 |
// Stop timer |
| 534 |
if (timer_io) { |
| 535 |
if (!CheckIO((struct IORequest *)timer_io)) |
| 536 |
AbortIO((struct IORequest *)timer_io); |
| 537 |
WaitIO((struct IORequest *)timer_io); |
| 538 |
CloseDevice((struct IORequest *)timer_io); |
| 539 |
DeleteIORequest(timer_io); |
| 540 |
} |
| 541 |
if (timer_port) |
| 542 |
DeleteMsgPort(timer_port); |
| 543 |
|
| 544 |
// Main task asked for termination, send signal |
| 545 |
Forbid(); |
| 546 |
Signal(MainTask, SIGF_SINGLE); |
| 547 |
} |
| 548 |
|
| 549 |
|
| 550 |
/* |
| 551 |
* Display error alert |
| 552 |
*/ |
| 553 |
|
| 554 |
void ErrorAlert(const char *text) |
| 555 |
{ |
| 556 |
if (PrefsFindBool("nogui")) { |
| 557 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 558 |
return; |
| 559 |
} |
| 560 |
EasyStruct req; |
| 561 |
req.es_StructSize = sizeof(EasyStruct); |
| 562 |
req.es_Flags = 0; |
| 563 |
req.es_Title = (UBYTE *)GetString(STR_ERROR_ALERT_TITLE); |
| 564 |
req.es_TextFormat = (UBYTE *)GetString(STR_GUI_ERROR_PREFIX); |
| 565 |
req.es_GadgetFormat = (UBYTE *)GetString(STR_QUIT_BUTTON); |
| 566 |
EasyRequest(NULL, &req, NULL, (ULONG)text); |
| 567 |
} |
| 568 |
|
| 569 |
|
| 570 |
/* |
| 571 |
* Display warning alert |
| 572 |
*/ |
| 573 |
|
| 574 |
void WarningAlert(const char *text) |
| 575 |
{ |
| 576 |
if (PrefsFindBool("nogui")) { |
| 577 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 578 |
return; |
| 579 |
} |
| 580 |
EasyStruct req; |
| 581 |
req.es_StructSize = sizeof(EasyStruct); |
| 582 |
req.es_Flags = 0; |
| 583 |
req.es_Title = (UBYTE *)GetString(STR_WARNING_ALERT_TITLE); |
| 584 |
req.es_TextFormat = (UBYTE *)GetString(STR_GUI_WARNING_PREFIX); |
| 585 |
req.es_GadgetFormat = (UBYTE *)GetString(STR_OK_BUTTON); |
| 586 |
EasyRequest(NULL, &req, NULL, (ULONG)text); |
| 587 |
} |
| 588 |
|
| 589 |
|
| 590 |
/* |
| 591 |
* Display choice alert |
| 592 |
*/ |
| 593 |
|
| 594 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
| 595 |
{ |
| 596 |
char str[256]; |
| 597 |
sprintf(str, "%s|%s", pos, neg); |
| 598 |
EasyStruct req; |
| 599 |
req.es_StructSize = sizeof(EasyStruct); |
| 600 |
req.es_Flags = 0; |
| 601 |
req.es_Title = (UBYTE *)GetString(STR_WARNING_ALERT_TITLE); |
| 602 |
req.es_TextFormat = (UBYTE *)GetString(STR_GUI_WARNING_PREFIX); |
| 603 |
req.es_GadgetFormat = (UBYTE *)str; |
| 604 |
return EasyRequest(NULL, &req, NULL, (ULONG)text); |
| 605 |
} |
| 606 |
|
| 607 |
|
| 608 |
/* |
| 609 |
* Illegal Instruction and Privilege Violation trap handlers |
| 610 |
*/ |
| 611 |
|
| 612 |
struct trap_regs { // This must match the layout of M68kRegisters |
| 613 |
uint32 d[8]; |
| 614 |
uint32 a[8]; |
| 615 |
uint16 sr; |
| 616 |
uint32 pc; |
| 617 |
}; |
| 618 |
|
| 619 |
void __saveds IllInstrHandler(trap_regs *r) |
| 620 |
{ |
| 621 |
uint16 opcode = *(uint16 *)(r->pc); |
| 622 |
if ((opcode & 0xff00) != 0x7100) { |
| 623 |
printf("Illegal Instruction %04x at %08lx\n", *(uint16 *)(r->pc), r->pc); |
| 624 |
printf("d0 %08lx d1 %08lx d2 %08lx d3 %08lx\n" |
| 625 |
"d4 %08lx d5 %08lx d6 %08lx d7 %08lx\n" |
| 626 |
"a0 %08lx a1 %08lx a2 %08lx a3 %08lx\n" |
| 627 |
"a4 %08lx a5 %08lx a6 %08lx a7 %08lx\n" |
| 628 |
"sr %04x\n", |
| 629 |
r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7], |
| 630 |
r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7], |
| 631 |
r->sr); |
| 632 |
QuitEmulator(); |
| 633 |
} else { |
| 634 |
// Disable interrupts |
| 635 |
uint16 sr = EmulatedSR; |
| 636 |
EmulatedSR |= 0x0700; |
| 637 |
|
| 638 |
// Call opcode routine |
| 639 |
EmulOp(opcode, (M68kRegisters *)r); |
| 640 |
r->pc += 2; |
| 641 |
|
| 642 |
// Restore interrupts |
| 643 |
EmulatedSR = sr; |
| 644 |
if ((EmulatedSR & 0x0700) == 0 && InterruptFlags) |
| 645 |
Signal(MainTask, IRQSigMask); |
| 646 |
} |
| 647 |
} |
| 648 |
|
| 649 |
void __saveds PrivViolHandler(trap_regs *r) |
| 650 |
{ |
| 651 |
printf("Privileged instruction %04x %04x at %08lx\n", *(uint16 *)(r->pc), *(uint16 *)(r->pc + 2), r->pc); |
| 652 |
printf("d0 %08lx d1 %08lx d2 %08lx d3 %08lx\n" |
| 653 |
"d4 %08lx d5 %08lx d6 %08lx d7 %08lx\n" |
| 654 |
"a0 %08lx a1 %08lx a2 %08lx a3 %08lx\n" |
| 655 |
"a4 %08lx a5 %08lx a6 %08lx a7 %08lx\n" |
| 656 |
"sr %04x\n", |
| 657 |
r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7], |
| 658 |
r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7], |
| 659 |
r->sr); |
| 660 |
QuitEmulator(); |
| 661 |
} |
