| 42 |
|
// Index in srom |
| 43 |
|
static uint32 p; |
| 44 |
|
|
| 45 |
+ |
// Length of slot ROM |
| 46 |
+ |
static int slot_rom_size = 0; |
| 47 |
+ |
|
| 48 |
|
|
| 49 |
|
// Check whether a mode with the specified depth exists |
| 50 |
|
static bool has_depth(video_depth depth) |
| 436 |
|
// Format/header block |
| 437 |
|
Offs(0, sRsrcDir); // sResource directory |
| 438 |
|
Long(p + 16); // Length of declaration data |
| 439 |
< |
Long(0); // CRC (calculated below) |
| 439 |
> |
Long(0); // CRC (calculated later) |
| 440 |
|
Word(0x0101); // Rev. level, format |
| 441 |
|
Long(0x5a932bc7); // Test pattern |
| 442 |
|
Word(0x000f); // Byte lanes |
| 443 |
|
|
| 444 |
+ |
// Copy slot ROM to Mac ROM |
| 445 |
+ |
slot_rom_size = p; |
| 446 |
+ |
memcpy(ROMBaseHost + ROMSize - slot_rom_size, srom, slot_rom_size); |
| 447 |
+ |
|
| 448 |
+ |
// Calculate checksum |
| 449 |
+ |
ChecksumSlotROM(); |
| 450 |
+ |
return true; |
| 451 |
+ |
} |
| 452 |
+ |
|
| 453 |
+ |
/* |
| 454 |
+ |
* Calculate slot ROM checksum (in-place) |
| 455 |
+ |
*/ |
| 456 |
+ |
|
| 457 |
+ |
void ChecksumSlotROM(void) |
| 458 |
+ |
{ |
| 459 |
|
// Calculate CRC |
| 460 |
+ |
uint8 *p = ROMBaseHost + ROMSize - slot_rom_size; |
| 461 |
+ |
p[slot_rom_size - 12] = 0; |
| 462 |
+ |
p[slot_rom_size - 11] = 0; |
| 463 |
+ |
p[slot_rom_size - 10] = 0; |
| 464 |
+ |
p[slot_rom_size - 9] = 0; |
| 465 |
|
uint32 crc = 0; |
| 466 |
< |
for (uint32 i=0; i<p; i++) { |
| 466 |
> |
for (uint32 i=0; i<slot_rom_size; i++) { |
| 467 |
|
crc = (crc << 1) | (crc >> 31); |
| 468 |
< |
crc += srom[i]; |
| 468 |
> |
crc += p[i]; |
| 469 |
|
} |
| 470 |
< |
srom[p - 12] = crc >> 24; |
| 471 |
< |
srom[p - 11] = crc >> 16; |
| 472 |
< |
srom[p - 10] = crc >> 8; |
| 473 |
< |
srom[p - 9] = crc; |
| 451 |
< |
|
| 452 |
< |
// Copy slot ROM to Mac ROM |
| 453 |
< |
memcpy(ROMBaseHost + ROMSize - p, srom, p); |
| 454 |
< |
return true; |
| 470 |
> |
p[slot_rom_size - 12] = crc >> 24; |
| 471 |
> |
p[slot_rom_size - 11] = crc >> 16; |
| 472 |
> |
p[slot_rom_size - 10] = crc >> 8; |
| 473 |
> |
p[slot_rom_size - 9] = crc; |
| 474 |
|
} |
