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root/cebix/BasiliskII/src/rom_patches.cpp
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Comparing BasiliskII/src/rom_patches.cpp (file contents):
Revision 1.14 by cebix, 2000-07-22T16:00:33Z vs.
Revision 1.25 by gbeauche, 2005-01-30T21:42:13Z

# Line 1 | Line 1
1   /*
2   *  rom_patches.cpp - ROM patches
3   *
4 < *  Basilisk II (C) 1997-2000 Christian Bauer
4 > *  Basilisk II (C) 1997-2005 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
# Line 41 | Line 41
41   // Global variables
42   uint32 UniversalInfo;           // ROM offset of UniversalInfo
43   uint32 PutScrapPatch;           // Mac address of PutScrap() patch
44 + uint32 GetScrapPatch = 0;       // Mac address of GetScrap() patch
45   uint32 ROMBreakpoint = 0;       // ROM offset of breakpoint (0 = disabled, 0x2310 = CritError)
46   bool PrintROMInfo = false;      // Flag: print ROM information in PatchROM()
47 + bool PatchHWBases = true;       // Flag: patch hardware base addresses
48  
49 < static uint32 sony_offset;                              // ROM offset of .Sony driver
50 < static uint32 serd_offset;                              // ROM offset of SERD resource (serial drivers)
51 < static uint32 microseconds_offset;              // ROM offset of Microseconds() replacement routine
49 > static uint32 sony_offset;              // ROM offset of .Sony driver
50 > static uint32 serd_offset;              // ROM offset of SERD resource (serial drivers)
51 > static uint32 microseconds_offset;      // ROM offset of Microseconds() replacement routine
52 > static uint32 debugutil_offset;         // ROM offset of DebugUtil() replacement routine
53  
54   // Prototypes
55   uint16 ROMVersion;
56  
57 + /*
58 + *  Macros used to extract one of the 16-bit words from a 32-bit word value
59 + */
60 +
61 + #define HiWord(X) (((X) >> 16) & 0xffff)
62 + #define LoWord(X) ((X) & 0xffff)
63 +
64  
65   /*
66   *  Search ROM for byte string, return ROM offset (or 0)
# Line 270 | Line 280 | static void list_universal_infos(void)
280                                  printf("Universal Table at %08x:\n", q);
281                                  printf("Offset\t ID\tHWCfg\tROM85\tModel\n");
282                                  printf("------------------------------------------------\n");
283 <                                while (ofs = ReadMacInt32(ROMBaseMac + q)) {
283 >                                while ((ofs = ReadMacInt32(ROMBaseMac + q))) {
284                                          print_universal_info(ROMBaseMac + ofs + q);
285                                          q += 4;
286                                  }
# Line 701 | Line 711 | void InstallDrivers(uint32 pb)
711          r.d[0] = 0xa093;
712          Execute68kTrap(0xa247, &r);             // SetOSTrapAddress()
713  
714 +        // Install DebugUtil() replacement routine
715 +        r.a[0] = ROMBaseMac + debugutil_offset;
716 +        r.d[0] = 0xa08d;
717 +        Execute68kTrap(0xa247, &r);             // SetOSTrapAddress()
718 +
719          // Install disk driver
720          r.a[0] = ROMBaseMac + sony_offset + 0x100;
721          r.d[0] = (uint32)DiskRefNum;
# Line 812 | Line 827 | bool CheckROM(void)
827          // Read version
828          ROMVersion = ntohs(*(uint16 *)(ROMBaseHost + 8));
829  
830 < #if REAL_ADDRESSING
831 <        // Real addressing mode requires a 32-bit clean ROM
830 > #if REAL_ADDRESSING || DIRECT_ADDRESSING
831 >        // Real and direct addressing modes require a 32-bit clean ROM
832          return ROMVersion == ROM_VERSION_32;
833   #else
834          // Virtual addressing mode works with 32-bit clean Mac II ROMs and Classic ROMs
# Line 930 | Line 945 | static bool patch_rom_classic(void)
945          *wp++ = htons(M68K_RTS);
946          microseconds_offset = (uint8 *)wp - ROMBaseHost;
947          *wp++ = htons(M68K_EMUL_OP_MICROSECONDS);
948 +        *wp++ = htons(M68K_RTS);
949 +
950 +        // Replace DebugUtil
951 +        debugutil_offset = (uint8 *)wp - ROMBaseHost;
952 +        *wp++ = htons(M68K_EMUL_OP_DEBUGUTIL);
953          *wp = htons(M68K_RTS);
954  
955          // Replace SCSIDispatch()
# Line 979 | Line 999 | static bool patch_rom_classic(void)
999          *wp++ = htons(M68K_NOP);
1000          *wp = htons(M68K_NOP);
1001  
1002 <        wp = (uint16 *)(ROMBaseHost + 0x2be8);  // 60Hz handler (handles everything)
1002 >        wp = (uint16 *)(ROMBaseHost + 0x2be4);  // 60Hz handler (handles everything)
1003 >        *wp++ = htons(M68K_NOP);
1004 >        *wp++ = htons(M68K_NOP);
1005          *wp++ = htons(M68K_EMUL_OP_IRQ);
1006          *wp++ = htons(0x4a80);          // tst.l        d0
1007          *wp = htons(0x67f4);            // beq          0x402be2
# Line 1010 | Line 1032 | static bool patch_rom_32(void)
1032          bp = ROMBaseHost + UniversalInfo + 18;          // productKind
1033          *bp = PrefsFindInt32("modelid");
1034  
1035 + #if !ROM_IS_WRITE_PROTECTED
1036 + #if defined(USE_SCRATCHMEM_SUBTERFUGE)
1037 +        // Set hardware base addresses to scratch memory area
1038 +        if (PatchHWBases) {
1039 +                extern uint8 *ScratchMem;
1040 +                const uint32 ScratchMemBase = Host2MacAddr(ScratchMem);
1041 +                
1042 +                D(bug("LMGlob\tOfs/4\tBase\n"));
1043 +                base = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo); // decoderInfoPtr
1044 +                wp = (uint16 *)(ROMBaseHost + 0x94a);
1045 +                while (*wp != 0xffff) {
1046 +                        int16 ofs = ntohs(*wp++);                       // offset in decoderInfo (/4)
1047 +                        int16 lmg = ntohs(*wp++);                       // address of LowMem global
1048 +                        D(bug("0x%04x\t%d\t0x%08x\n", lmg, ofs, ReadMacInt32(base + ofs*4)));
1049 +                        
1050 +                        // Fake address only if this is not the ASC base
1051 +                        if (lmg != 0xcc0)
1052 +                                WriteMacInt32(base + ofs*4, ScratchMemBase);
1053 +                }
1054 +        }
1055 + #else
1056 + #error System specific handling for writable ROM is required here
1057 + #endif
1058 + #endif
1059 +
1060          // Make FPU optional
1061          if (FPUType == 0) {
1062                  bp = ROMBaseHost + UniversalInfo + 22;  // defaultRSRCs
# Line 1192 | Line 1239 | static bool patch_rom_32(void)
1239          *wp = htons(M68K_RTS);
1240  
1241          // Fake CPU speed test (SetupTimeK)
1242 +        // *** increased jl : MacsBug uses TimeDBRA for kbd repeat timing
1243          wp = (uint16 *)(ROMBaseHost + 0x800);
1244          *wp++ = htons(0x31fc);                  // move.w       #xxx,TimeDBRA
1245 <        *wp++ = htons(100);
1245 >        *wp++ = htons(10000);
1246          *wp++ = htons(0x0d00);
1247          *wp++ = htons(0x31fc);                  // move.w       #xxx,TimeSCCDBRA
1248 <        *wp++ = htons(100);
1248 >        *wp++ = htons(10000);
1249          *wp++ = htons(0x0d02);
1250          *wp++ = htons(0x31fc);                  // move.w       #xxx,TimeSCSIDBRA
1251 <        *wp++ = htons(100);
1251 >        *wp++ = htons(10000);
1252          *wp++ = htons(0x0b24);
1253          *wp++ = htons(0x31fc);                  // move.w       #xxx,TimeRAMDBRA
1254 <        *wp++ = htons(100);
1254 >        *wp++ = htons(10000);
1255          *wp++ = htons(0x0cea);
1256          *wp = htons(M68K_RTS);
1257  
1258   #if REAL_ADDRESSING
1259          // Move system zone to start of Mac RAM
1260 <        lp = (uint32 *)(ROMBaseHost + 0x50a);
1261 <        *lp++ = htonl(RAMBaseMac);
1262 <        *lp = htonl(RAMBaseMac + 0x1800);
1260 >        wp = (uint16 *)(ROMBaseHost + 0x50a);
1261 >        *wp++ = htons(HiWord(RAMBaseMac + 0x2000));
1262 >        *wp++ = htons(LoWord(RAMBaseMac + 0x2000));
1263 >        *wp++ = htons(HiWord(RAMBaseMac + 0x3800));
1264 >        *wp = htons(LoWord(RAMBaseMac + 0x3800));
1265   #endif
1266  
1267   #if !ROM_IS_WRITE_PROTECTED
1268 < #if defined(AMIGA) || defined(__NetBSD__)
1268 > #if defined(USE_SCRATCHMEM_SUBTERFUGE)
1269          // Set fake handle at 0x0000 to scratch memory area (so broken Mac programs won't write into Mac ROM)
1270 <        extern uint32 ScratchMem;
1270 >        extern uint8 *ScratchMem;
1271 >        const uint32 ScratchMemBase = Host2MacAddr(ScratchMem);
1272          wp = (uint16 *)(ROMBaseHost + 0xccaa);
1273          *wp++ = htons(0x203c);                  // move.l       #ScratchMem,d0
1274 <        *wp++ = htons(ScratchMem >> 16);
1275 <        *wp = htons(ScratchMem);
1274 >        *wp++ = htons(ScratchMemBase >> 16);
1275 >        *wp = htons(ScratchMemBase);
1276   #else
1277   #error System specific handling for writable ROM is required here
1278   #endif
# Line 1233 | Line 1284 | static bool patch_rom_32(void)
1284          *wp++ = htons(M68K_NOP);
1285          *wp = htons(M68K_NOP);
1286   #endif
1287 <
1287 >        
1288 > #if REAL_ADDRESSING && !defined(AMIGA)
1289 >        // gb-- Temporary hack to get rid of crashes in Speedometer
1290 >        wp = (uint16 *)(ROMBaseHost + 0xdba2);
1291 >        if (ntohs(*wp) == 0x662c)               // bne.b        #$2c
1292 >                *wp = htons(0x602c);            // bra.b        #$2c
1293 > #endif
1294 >        
1295          // Don't write to VIA in InitTimeMgr
1296          wp = (uint16 *)(ROMBaseHost + 0xb0e2);
1297          *wp++ = htons(0x4cdf);                  // movem.l      (sp)+,d0-d5/a0-a4
# Line 1429 | Line 1487 | static bool patch_rom_32(void)
1487          if (ROMSize > 0x80000) {
1488  
1489                  // BlockMove()
1490 <                static const uint8 ptest_dat[] = {0xa0, 0x8d, 0x0c, 0x81, 0x00, 0x00, 0x0c, 0x00, 0x6d, 0x06, 0x4e, 0x71, 0xf4, 0xf8};
1491 <                base = find_rom_data(0x87000, 0x87800, ptest_dat, sizeof(ptest_dat));
1492 <                D(bug("ptest %08lx\n", base));
1490 >                static const uint8 bmove_dat[] = {0x20, 0x5f, 0x22, 0x5f, 0x0c, 0x38, 0x00, 0x04, 0x01, 0x2f};
1491 >                base = find_rom_data(0x87000, 0x87800, bmove_dat, sizeof(bmove_dat));
1492 >                D(bug("block_move %08lx\n", base));
1493                  if (base) {             // ROM15/22/23/26/27/32
1494 <                        wp = (uint16 *)(ROMBaseHost + base + 8);
1495 <                        *wp = htons(M68K_NOP);
1494 >                        wp = (uint16 *)(ROMBaseHost + base + 4);
1495 >                        *wp++ = htons(M68K_EMUL_OP_BLOCK_MOVE);
1496 >                        *wp++ = htons(0x7000);
1497 >                        *wp = htons(M68K_RTS);
1498                  }
1499  
1500                  // SANE
# Line 1461 | Line 1521 | static bool patch_rom_32(void)
1521          }
1522  
1523          // Patch .EDisk driver (don't scan for EDisks in the area ROMBase..0xe00000)
1524 <        uint32 edisk_offset = find_rom_resource('DRVR', 51);
1524 >        uint32 edisk_offset = find_rom_resource(FOURCC('D','R','V','R'), 51);
1525          if (edisk_offset) {
1526                  static const uint8 edisk_dat[] = {0xd5, 0xfc, 0x00, 0x01, 0x00, 0x00, 0xb5, 0xfc, 0x00, 0xe0, 0x00, 0x00};
1527                  base = find_rom_data(edisk_offset, edisk_offset + 0x10000, edisk_dat, sizeof(edisk_dat));
# Line 1474 | Line 1534 | static bool patch_rom_32(void)
1534          }
1535  
1536          // Replace .Sony driver
1537 <        sony_offset = find_rom_resource('DRVR', 4);
1537 >        sony_offset = find_rom_resource(FOURCC('D','R','V','R'), 4);
1538          D(bug("sony %08lx\n", sony_offset));
1539          memcpy(ROMBaseHost + sony_offset, sony_driver, sizeof(sony_driver));
1540  
# Line 1493 | Line 1553 | static bool patch_rom_32(void)
1553          memcpy(ROMBaseHost + sony_offset + 0xa00, CDROMIcon, sizeof(CDROMIcon));
1554  
1555          // Install SERD patch and serial drivers
1556 <        serd_offset = find_rom_resource('SERD', 0);
1556 >        serd_offset = find_rom_resource(FOURCC('S','E','R','D'), 0);
1557          D(bug("serd %08lx\n", serd_offset));
1558          wp = (uint16 *)(ROMBaseHost + serd_offset + 12);
1559          *wp++ = htons(M68K_EMUL_OP_SERD);
# Line 1526 | Line 1586 | static bool patch_rom_32(void)
1586          *wp++ = htons(M68K_RTS);
1587          microseconds_offset = (uint8 *)wp - ROMBaseHost;
1588          *wp++ = htons(M68K_EMUL_OP_MICROSECONDS);
1589 +        *wp++ = htons(M68K_RTS);
1590 +
1591 +        // Replace DebugUtil
1592 +        debugutil_offset = (uint8 *)wp - ROMBaseHost;
1593 +        *wp++ = htons(M68K_EMUL_OP_DEBUGUTIL);
1594          *wp = htons(M68K_RTS);
1595  
1596          // Replace SCSIDispatch()
# Line 1561 | Line 1626 | static bool patch_rom_32(void)
1626          *wp++ = htons(base >> 16);
1627          *wp = htons(base & 0xffff);
1628  
1629 < #if EMULATED_68K
1630 <        // Replace BlockMove()
1631 <        wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa02e));   // BlockMove()
1632 <        *wp++ = htons(M68K_EMUL_OP_BLOCK_MOVE);
1633 <        *wp++ = htons(0x7000);
1634 <        *wp = htons(M68K_RTS);
1635 < #endif
1629 >        // Install GetScrap() patch for clipboard data exchange (the patch is activated by EMUL_OP_INSTALL_DRIVERS)
1630 >        GetScrapPatch = ROMBaseMac + sony_offset + 0xd00;
1631 >        base = ROMBaseMac + find_rom_trap(0xa9fd);
1632 >        wp = (uint16 *)(ROMBaseHost + sony_offset + 0xd00);
1633 >        *wp++ = htons(M68K_EMUL_OP_GET_SCRAP);
1634 >        *wp++ = htons(M68K_JMP);
1635 >        *wp++ = htons(base >> 16);
1636 >        *wp = htons(base & 0xffff);
1637  
1638          // Look for double PACK 4 resources
1639 <        if ((base = find_rom_resource('PACK', 4)) == 0) return false;
1640 <        if ((base = find_rom_resource('PACK', 4, true)) == 0 && FPUType == 0)
1639 >        if ((base = find_rom_resource(FOURCC('P','A','C','K'), 4)) == 0) return false;
1640 >        if ((base = find_rom_resource(FOURCC('P','A','C','K'), 4, true)) == 0 && FPUType == 0)
1641                  printf("WARNING: This ROM seems to require an FPU\n");
1642  
1643          // Patch VIA interrupt handler
# Line 1582 | Line 1648 | static bool patch_rom_32(void)
1648          *wp++ = htons(M68K_NOP);
1649          *wp = htons(M68K_NOP);
1650  
1651 <        wp = (uint16 *)(ROMBaseHost + 0xa29a);  // 60Hz handler (handles everything)
1651 >        wp = (uint16 *)(ROMBaseHost + 0xa296);  // 60Hz handler (handles everything)
1652 >        *wp++ = htons(M68K_NOP);
1653 >        *wp++ = htons(M68K_NOP);
1654          *wp++ = htons(M68K_EMUL_OP_IRQ);
1655          *wp++ = htons(0x4a80);          // tst.l        d0
1656          *wp = htons(0x67f4);            // beq          0x4080a294

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