| 97 |
|
struct Library *DiskBase = NULL; |
| 98 |
|
|
| 99 |
|
struct Task *MainTask; // Our task |
| 100 |
< |
uint32 ScratchMem = NULL; // Scratch memory for Mac ROM writes |
| 100 |
> |
uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes |
| 101 |
|
APTR OldTrapHandler = NULL; // Old trap handler |
| 102 |
|
APTR OldExceptionHandler = NULL; // Old exception handler |
| 103 |
|
BYTE IRQSig = -1; // "Interrupt" signal number |
| 108 |
|
static struct MsgPort *ahi_port = NULL; // Port for AHI |
| 109 |
|
static struct AHIRequest *ahi_io = NULL; // IORequest for AHI |
| 110 |
|
|
| 111 |
+ |
static struct Process *xpram_proc = NULL; // XPRAM watchdog |
| 112 |
+ |
static volatile bool xpram_proc_active = true; // Flag for quitting the XPRAM watchdog |
| 113 |
+ |
|
| 114 |
|
static struct Process *tick_proc = NULL; // 60Hz process |
| 115 |
|
static volatile bool tick_proc_active = true; // Flag for quitting the 60Hz process |
| 116 |
|
|
| 123 |
|
extern "C" void AtomicAnd(uint32 *p, uint32 val); |
| 124 |
|
extern "C" void AtomicOr(uint32 *p, uint32 val); |
| 125 |
|
extern "C" void MoveVBR(void); |
| 126 |
+ |
extern "C" void DisableSuperBypass(void); |
| 127 |
|
extern "C" void TrapHandlerAsm(void); |
| 128 |
|
extern "C" void ExceptionHandlerAsm(void); |
| 129 |
|
extern "C" void IllInstrHandler(trap_regs *regs); |
| 130 |
|
extern "C" void PrivViolHandler(trap_regs *regs); |
| 131 |
|
extern "C" void quit_emulator(void); |
| 132 |
+ |
extern "C" void AsmTriggerNMI(void); |
| 133 |
|
uint16 EmulatedSR; // Emulated SR (supervisor bit and interrupt mask) |
| 134 |
|
|
| 135 |
|
|
| 136 |
|
// Prototypes |
| 137 |
|
static void jump_to_rom(void); |
| 138 |
+ |
static void xpram_func(void); |
| 139 |
|
static void tick_func(void); |
| 140 |
|
|
| 141 |
|
|
| 143 |
|
* Main program |
| 144 |
|
*/ |
| 145 |
|
|
| 146 |
< |
int main(void) |
| 146 |
> |
int main(int argc, char **argv) |
| 147 |
|
{ |
| 148 |
|
// Initialize variables |
| 149 |
|
RAMBaseHost = NULL; |
| 193 |
|
CyberGfxBase = OpenLibrary((UBYTE *)"cybergraphics.library", 2); |
| 194 |
|
|
| 195 |
|
// Read preferences |
| 196 |
< |
PrefsInit(); |
| 196 |
> |
PrefsInit(argc, argv); |
| 197 |
|
|
| 198 |
|
// Open AHI |
| 199 |
|
ahi_port = CreateMsgPort(); |
| 234 |
|
TimerBase = (struct Library *)timereq->tr_node.io_Device; |
| 235 |
|
|
| 236 |
|
// Allocate scratch memory |
| 237 |
< |
ScratchMem = (uint32)AllocMem(SCRATCH_MEM_SIZE, MEMF_PUBLIC); |
| 237 |
> |
ScratchMem = (uint8 *)AllocMem(SCRATCH_MEM_SIZE, MEMF_PUBLIC); |
| 238 |
|
if (ScratchMem == NULL) { |
| 239 |
|
ErrorAlert(GetString(STR_NO_MEM_ERR)); |
| 240 |
|
QuitEmulator(); |
| 248 |
|
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
| 249 |
|
RAMSize = 1024*1024; |
| 250 |
|
} |
| 251 |
< |
RAMBaseHost = (uint8 *)AllocMem(RAMSize + 0x100000, MEMF_PUBLIC); |
| 251 |
> |
RAMBaseHost = (uint8 *)AllocVec(RAMSize + 0x100000, MEMF_PUBLIC); |
| 252 |
|
if (RAMBaseHost == NULL) { |
| 253 |
< |
ErrorAlert(GetString(STR_NO_MEM_ERR)); |
| 254 |
< |
QuitEmulator(); |
| 253 |
> |
uint32 newRAMSize = AvailMem(MEMF_LARGEST) - 0x100000; |
| 254 |
> |
char xText[120]; |
| 255 |
> |
|
| 256 |
> |
sprintf(xText, GetString(STR_NOT_ENOUGH_MEM_WARN), RAMSize, newRAMSize); |
| 257 |
> |
|
| 258 |
> |
if (ChoiceAlert(xText, "Use", "Quit") != 1) |
| 259 |
> |
QuitEmulator(); |
| 260 |
> |
|
| 261 |
> |
RAMSize = newRAMSize; |
| 262 |
> |
RAMBaseHost = (uint8 *)AllocVec(RAMSize + 0x100000, MEMF_PUBLIC); |
| 263 |
> |
if (RAMBaseHost == NULL) { |
| 264 |
> |
ErrorAlert(GetString(STR_NO_MEM_ERR)); |
| 265 |
> |
QuitEmulator(); |
| 266 |
> |
} |
| 267 |
|
} |
| 268 |
|
RAMBaseMac = (uint32)RAMBaseHost; |
| 269 |
|
D(bug("Mac RAM starts at %08lx\n", RAMBaseHost)); |
| 308 |
|
// Move VBR away from 0 if neccessary |
| 309 |
|
MoveVBR(); |
| 310 |
|
|
| 311 |
+ |
// On 68060, disable Super Bypass mode because of a CPU bug that is triggered by MacOS 8 |
| 312 |
+ |
if (CPUIs68060) |
| 313 |
+ |
DisableSuperBypass(); |
| 314 |
+ |
|
| 315 |
|
// Install trap handler |
| 316 |
|
EmulatedSR = 0x2700; |
| 317 |
|
OldTrapHandler = MainTask->tc_TrapCode; |
| 324 |
|
MainTask->tc_ExceptCode = (APTR)ExceptionHandlerAsm; |
| 325 |
|
SetExcept(SIGBREAKF_CTRL_C | IRQSigMask, SIGBREAKF_CTRL_C | IRQSigMask); |
| 326 |
|
|
| 327 |
+ |
// Start XPRAM watchdog process |
| 328 |
+ |
xpram_proc = CreateNewProcTags( |
| 329 |
+ |
NP_Entry, (ULONG)xpram_func, |
| 330 |
+ |
NP_Name, (ULONG)"Basilisk II XPRAM Watchdog", |
| 331 |
+ |
NP_Priority, 0, |
| 332 |
+ |
TAG_END |
| 333 |
+ |
); |
| 334 |
+ |
|
| 335 |
|
// Start 60Hz process |
| 336 |
|
tick_proc = CreateNewProcTags( |
| 337 |
|
NP_Entry, (ULONG)tick_func, |
| 343 |
|
// Set task priority to -1 so we don't use all processing time |
| 344 |
|
SetTaskPri(MainTask, -1); |
| 345 |
|
|
| 346 |
+ |
WriteMacInt32(0xbff, 0); // MacsBugFlags |
| 347 |
+ |
|
| 348 |
|
// Swap stack to Mac RAM area |
| 349 |
|
stack_swap.stk_Lower = RAMBaseHost; |
| 350 |
|
stack_swap.stk_Upper = (ULONG)RAMBaseHost + RAMSize; |
| 379 |
|
|
| 380 |
|
void QuitEmulator(void) |
| 381 |
|
{ |
| 382 |
< |
// Stop 60Hz thread |
| 382 |
> |
// Stop 60Hz process |
| 383 |
|
if (tick_proc) { |
| 384 |
|
SetSignal(0, SIGF_SINGLE); |
| 385 |
|
tick_proc_active = false; |
| 386 |
|
Wait(SIGF_SINGLE); |
| 387 |
|
} |
| 388 |
|
|
| 389 |
+ |
// Stop XPRAM watchdog process |
| 390 |
+ |
if (xpram_proc) { |
| 391 |
+ |
SetSignal(0, SIGF_SINGLE); |
| 392 |
+ |
xpram_proc_active = false; |
| 393 |
+ |
Wait(SIGF_SINGLE); |
| 394 |
+ |
} |
| 395 |
+ |
|
| 396 |
|
// Restore stack |
| 397 |
|
if (stack_swapped) { |
| 398 |
|
stack_swapped = false; |
| 414 |
|
|
| 415 |
|
// Delete RAM/ROM area |
| 416 |
|
if (RAMBaseHost) |
| 417 |
< |
FreeMem(RAMBaseHost, RAMSize + 0x100000); |
| 417 |
> |
FreeVec(RAMBaseHost); |
| 418 |
|
|
| 419 |
|
// Delete scratch memory area |
| 420 |
|
if (ScratchMem) |
| 492 |
|
Signal(MainTask, IRQSigMask); |
| 493 |
|
} |
| 494 |
|
|
| 495 |
+ |
void TriggerNMI(void) |
| 496 |
+ |
{ |
| 497 |
+ |
AsmTriggerNMI(); |
| 498 |
+ |
} |
| 499 |
+ |
|
| 500 |
|
|
| 501 |
|
/* |
| 502 |
< |
* 60Hz thread |
| 502 |
> |
* 60Hz thread (really 60.15Hz) |
| 503 |
|
*/ |
| 504 |
|
|
| 505 |
|
static __saveds void tick_func(void) |
| 561 |
|
|
| 562 |
|
// Main task asked for termination, send signal |
| 563 |
|
Forbid(); |
| 564 |
+ |
Signal(MainTask, SIGF_SINGLE); |
| 565 |
+ |
} |
| 566 |
+ |
|
| 567 |
+ |
|
| 568 |
+ |
/* |
| 569 |
+ |
* XPRAM watchdog thread (saves XPRAM every minute) |
| 570 |
+ |
*/ |
| 571 |
+ |
|
| 572 |
+ |
static __saveds void xpram_func(void) |
| 573 |
+ |
{ |
| 574 |
+ |
uint8 last_xpram[256]; |
| 575 |
+ |
memcpy(last_xpram, XPRAM, 256); |
| 576 |
+ |
|
| 577 |
+ |
while (xpram_proc_active) { |
| 578 |
+ |
for (int i=0; i<60 && xpram_proc_active; i++) |
| 579 |
+ |
Delay(50); // Only wait 1 second so we quit promptly when xpram_proc_active becomes false |
| 580 |
+ |
if (memcmp(last_xpram, XPRAM, 256)) { |
| 581 |
+ |
memcpy(last_xpram, XPRAM, 256); |
| 582 |
+ |
SaveXPRAM(); |
| 583 |
+ |
} |
| 584 |
+ |
} |
| 585 |
+ |
|
| 586 |
+ |
// Main task asked for termination, send signal |
| 587 |
+ |
Forbid(); |
| 588 |
|
Signal(MainTask, SIGF_SINGLE); |
| 589 |
|
} |
| 590 |
|
|
