| 38 |
|
#include "debug.h" |
| 39 |
|
|
| 40 |
|
|
| 41 |
< |
// Breakpoint |
| 42 |
< |
//#define M68K_BREAKPOINT 0x2310 // CritError |
| 43 |
< |
//#define M68K_BREAKPOINT 0x1d10 // BootMe |
| 41 |
> |
// Breakpoint (offset into ROM) |
| 42 |
> |
uint32 ROMBreakpoint = 0; // 0 = disabled, 0x2310 = CritError |
| 43 |
|
|
| 44 |
|
// Global variables |
| 45 |
|
uint32 UniversalInfo; // ROM offset of UniversalInfo |
| 546 |
|
r.d[0] = 0xa093; |
| 547 |
|
Execute68kTrap(0xa247, &r); // SetOSTrapAddress() |
| 548 |
|
|
| 549 |
+ |
// Install MemoryDispatch() replacement routine |
| 550 |
+ |
r.a[0] = ROMBaseMac + memory_dispatch_offset; |
| 551 |
+ |
r.d[0] = 0xa05c; |
| 552 |
+ |
Execute68kTrap(0xa247, &r); // SetOSTrapAddress() |
| 553 |
+ |
|
| 554 |
|
// Install disk driver |
| 555 |
|
r.a[0] = ROMBaseMac + sony_offset + 0x100; |
| 556 |
|
r.d[0] = (uint32)DiskRefNum; |
| 646 |
|
|
| 647 |
|
void PatchAfterStartup(void) |
| 648 |
|
{ |
| 645 |
– |
// Install MemoryDispatch() replacement routine |
| 646 |
– |
M68kRegisters r; |
| 647 |
– |
r.a[0] = ROMBaseMac + memory_dispatch_offset; |
| 648 |
– |
r.d[0] = 0xa05c; |
| 649 |
– |
Execute68kTrap(0xa247, &r); // SetOSTrapAddress() |
| 650 |
– |
|
| 649 |
|
#if SUPPORTS_EXTFS |
| 650 |
|
// Install external file system |
| 651 |
|
InstallExtFS(); |
| 1155 |
|
*wp++ = htons(M68K_NOP); |
| 1156 |
|
*wp = htons(M68K_NOP); |
| 1157 |
|
|
| 1158 |
< |
// Fix logical/physical RAM size (CompBootStack) (must be done after InitMemMgr!) |
| 1159 |
< |
static const uint8 fix_memsize_dat[] = {0x4e, 0x75}; |
| 1160 |
< |
if ((base = find_rom_data(0x490, 0x4b0, fix_memsize_dat, sizeof(fix_memsize_dat))) == 0) return false; |
| 1161 |
< |
D(bug("fix_memsize %08lx\n", base)); |
| 1162 |
< |
wp = (uint16 *)(ROMBaseHost + base); |
| 1158 |
> |
// Compute boot stack pointer and fix logical/physical RAM size (CompBootStack) (must be done after InitMemMgr!) |
| 1159 |
> |
wp = (uint16 *)(ROMBaseHost + 0x490); |
| 1160 |
> |
*wp++ = htons(0x2038); // move.l $10c,d0 |
| 1161 |
> |
*wp++ = htons(0x010c); |
| 1162 |
> |
*wp++ = htons(0xd0b8); // add.l $2a6,d0 |
| 1163 |
> |
*wp++ = htons(0x02a6); |
| 1164 |
> |
*wp++ = htons(0xe288); // lsr.l #1,d0 |
| 1165 |
> |
*wp++ = htons(0x0880); // bclr #0,d0 |
| 1166 |
> |
*wp++ = htons(0x0000); |
| 1167 |
> |
*wp++ = htons(0x0440); // subi.w #$400,d0 |
| 1168 |
> |
*wp++ = htons(0x0400); |
| 1169 |
> |
*wp++ = htons(0x2040); // move.l d0,a0 |
| 1170 |
|
*wp++ = htons(M68K_EMUL_OP_FIX_MEMSIZE); |
| 1171 |
< |
*wp = htons(M68K_RTS); |
| 1171 |
> |
*wp++ = htons(M68K_RTS); |
| 1172 |
|
|
| 1173 |
|
static const uint8 fix_memsize2_dat[] = {0x22, 0x30, 0x81, 0xe2, 0x0d, 0xdc, 0xff, 0xba, 0xd2, 0xb0, 0x81, 0xe2, 0x0d, 0xdc, 0xff, 0xec, 0x21, 0xc1, 0x1e, 0xf8}; |
| 1174 |
|
base = find_rom_data(0x4c000, 0x4c080, fix_memsize2_dat, sizeof(fix_memsize2_dat)); |
| 1301 |
|
} |
| 1302 |
|
} |
| 1303 |
|
|
| 1304 |
+ |
// Don't set MemoryDispatch() to unimplemented trap |
| 1305 |
+ |
static const uint8 memdisp_dat[] = {0x30, 0x3c, 0xa8, 0x9f, 0xa7, 0x46, 0x30, 0x3c, 0xa0, 0x5c, 0xa2, 0x47}; |
| 1306 |
+ |
base = find_rom_data(0x4f100, 0x4f180, memdisp_dat, sizeof(memdisp_dat)); |
| 1307 |
+ |
D(bug("memdisp %08lx\n", base)); |
| 1308 |
+ |
if (base) { // ROM15/32 |
| 1309 |
+ |
wp = (uint16 *)(ROMBaseHost + base + 10); |
| 1310 |
+ |
*wp = htons(M68K_NOP); |
| 1311 |
+ |
} |
| 1312 |
+ |
|
| 1313 |
|
// Patch .EDisk driver (don't scan for EDisks in the area ROMBase..0xe00000) |
| 1314 |
|
uint32 edisk_offset = find_rom_resource('DRVR', 51); |
| 1315 |
|
if (edisk_offset) { |
| 1417 |
|
*wp++ = htons(M68K_EMUL_OP_MEMORY_DISPATCH); |
| 1418 |
|
*wp = htons(M68K_RTS); |
| 1419 |
|
|
| 1420 |
+ |
#if EMULATED_68K |
| 1421 |
+ |
// Replace BlockMove() |
| 1422 |
+ |
wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa02e)); // BlockMove() |
| 1423 |
+ |
*wp++ = htons(M68K_EMUL_OP_BLOCK_MOVE); |
| 1424 |
+ |
*wp++ = htons(0x7000); |
| 1425 |
+ |
*wp = htons(M68K_RTS); |
| 1426 |
+ |
#endif |
| 1427 |
+ |
|
| 1428 |
|
// Patch VIA interrupt handler |
| 1429 |
|
wp = (uint16 *)(ROMBaseHost + 0x9bc4); // Level 1 handler |
| 1430 |
|
*wp++ = htons(0x7002); // moveq #2,d0 (always 60Hz interrupt) |
| 1462 |
|
return false; |
| 1463 |
|
} |
| 1464 |
|
|
| 1443 |
– |
#ifdef M68K_BREAKPOINT |
| 1465 |
|
// Install breakpoint |
| 1466 |
< |
uint16 *wp = (uint16 *)(ROMBaseHost + M68K_BREAKPOINT); |
| 1467 |
< |
*wp = htons(M68K_EMUL_BREAK); |
| 1468 |
< |
#endif |
| 1466 |
> |
if (ROMBreakpoint) { |
| 1467 |
> |
uint16 *wp = (uint16 *)(ROMBaseHost + ROMBreakpoint); |
| 1468 |
> |
*wp = htons(M68K_EMUL_BREAK); |
| 1469 |
> |
} |
| 1470 |
|
|
| 1471 |
|
// Clear caches as we loaded and patched code |
| 1472 |
|
FlushCodeCache(ROMBaseHost, ROMSize); |
