Rev 796 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 796 | DimkaM | 1 | #include "std.h" |
| 2 | |||
| 3 | #include "emul.h" |
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| 4 | #include "vars.h" |
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| 5 | #include "fdd.h" |
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| 6 | #include "upd765.h" |
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| 7 | |||
| 8 | #if 0 |
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| 9 | #define dprintf printf |
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| 10 | #else |
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| 11 | #define dprintf(...) |
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| 12 | #endif |
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| 13 | |||
| 14 | #pragma pack(push, 1) |
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| 15 | union TDiskInfo |
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| 16 | { |
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| 17 | struct |
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| 18 | { |
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| 19 | char Sig[34]; |
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| 20 | char Name[14]; |
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| 21 | u8 c; |
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| 22 | u8 h; |
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| 23 | u16 TrackSize; // ������ ��� dsk (�� ��� edsk) |
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| 24 | u8 TrackOffsets[]; // c * h, ������ ��� edsk |
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| 25 | }; |
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| 26 | u8 Raw[256]; |
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| 27 | }; |
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| 28 | |||
| 29 | #ifndef __ICL // icl 19 ��� win �� ����� __builtin_offsetof |
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| 30 | static_assert(offsetof(TDiskInfo, TrackOffsets) == 0x34); |
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| 31 | #endif |
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| 32 | |||
| 33 | struct TSecInfo |
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| 34 | { |
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| 35 | u8 c; |
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| 36 | u8 h; |
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| 37 | u8 r; |
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| 38 | u8 n; // sector size code |
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| 39 | u8 St1; |
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| 40 | u8 St2; |
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| 41 | u16 DataLen; // ������ ��� edsk |
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| 42 | }; |
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| 43 | |||
| 44 | union TTrackInfo |
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| 45 | { |
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| 46 | struct |
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| 47 | { |
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| 48 | char Sig[13]; |
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| 49 | char Reserved[3]; |
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| 50 | u8 c; |
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| 51 | u8 h; |
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| 52 | char Reserved2[2]; |
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| 53 | u8 n; // sector size code |
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| 54 | u8 NumSec; |
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| 55 | u8 Gap3Len; |
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| 56 | u8 Filler; |
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| 57 | TSecInfo SecInfoList[]; |
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| 58 | }; |
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| 59 | u8 Raw[256]; |
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| 60 | }; |
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| 61 | #pragma pack(pop) |
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| 62 | |||
| 63 | int FDD::read_dsk() |
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| 64 | { |
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| 65 | dprintf("read_dsk\n"); |
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| 66 | |||
| 67 | const auto DiskInfo{ (const TDiskInfo *)snbuf }; |
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| 68 | |||
| 69 | auto IsExtended{ memcmp(DiskInfo->Sig, "EXTENDED", 8) == 0}; |
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| 70 | if(!IsExtended && memcmp(DiskInfo->Sig, "MV - CPC", 8) != 0) |
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| 71 | { |
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| 72 | return 0; |
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| 73 | } |
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| 74 | |||
| 75 | newdisk(DiskInfo->c, DiskInfo->h); |
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| 76 | |||
| 77 | unsigned Offset{ sizeof(TDiskInfo) }; |
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| 78 | for(unsigned c = 0; c < DiskInfo->c; c++) |
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| 79 | { |
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| 80 | for(unsigned h = 0; h < DiskInfo->h; h++) |
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| 81 | { |
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| 82 | auto TrkSize{ IsExtended ? unsigned(DiskInfo->TrackOffsets[c*DiskInfo->h + h] << 8U) : DiskInfo->TrackSize }; |
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| 83 | if(TrkSize == 0) |
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| 84 | { |
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| 85 | continue; |
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| 86 | } |
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| 87 | t.seek(this, c, h, JUST_SEEK); |
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| 88 | |||
| 89 | const auto TrackInfo{ (const TTrackInfo *)(snbuf + Offset) }; |
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| 90 | const auto SecDataStart{ snbuf + Offset + sizeof(TTrackInfo) }; |
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| 91 | auto SecData{ SecDataStart }; |
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| 92 | u8* PrevSecData{ }; |
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| 93 | |||
| 94 | bool IsOverlappedSec = false; // Capitan Blood, License to kill |
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| 95 | if(IsExtended) |
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| 96 | { |
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| 97 | IsOverlappedSec = true; |
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| 98 | constexpr unsigned SecLen[]{ 128, 256, 512, 1024, 2048, 4096, 6144 }; |
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| 99 | for(unsigned s = 0; s < min(size_t(TrackInfo->NumSec), _countof(SecLen)); s++) |
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| 100 | { |
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| 101 | const auto &SecInfo{ TrackInfo->SecInfoList[s] }; |
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| 102 | if(SecLen[s] != SecInfo.DataLen) |
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| 103 | { |
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| 104 | IsOverlappedSec = false; |
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| 105 | break; |
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| 106 | } |
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| 107 | } |
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| 108 | } |
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| 109 | |||
| 110 | for(unsigned s = 0; s < TrackInfo->NumSec; s++) |
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| 111 | { |
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| 112 | const auto &SecInfo{ TrackInfo->SecInfoList[s] }; |
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| 113 | auto SecInfoDataLen{ SecInfo.DataLen }; |
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| 114 | t.hdr[s].c = SecInfo.c; |
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| 115 | t.hdr[s].s = SecInfo.h; |
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| 116 | t.hdr[s].n = SecInfo.r; |
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| 117 | t.hdr[s].l = SecInfo.n; |
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| 118 | t.hdr[s].c1 = 0; |
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| 119 | t.hdr[s].c2 = 0; |
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| 120 | t.hdr[s].wp = nullptr; |
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| 121 | t.hdr[s].data = SecData; |
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| 122 | |||
| 123 | |||
| 124 | t.hdr[s].datlen = IsExtended ? SecInfoDataLen : 128U << SecInfo.n; |
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| 125 | if(t.hdr[s].datlen == 0) |
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| 126 | { |
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| 127 | t.hdr[s].data = nullptr; |
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| 128 | } |
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| 129 | |||
| 130 | // ������ ���� ��� � golden axe (������ ������ �� ����� (��� 6, ������ 8192) |
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| 131 | // ��������� ������ �����, ������ ���� ������ �������) |
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| 132 | // ���� ������ ������ �������� ������ ���������� � ���� ������� (��������� ������� ������������ � ���� ������ ����� �������) |
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| 133 | // ����� ������� ���� ����� ��������� � udi ������� ����������� �������������� �� ������ A1A1A1 FE/FB |
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| 134 | // � ���������� � ��������� � �������� �������� ����� �� �������� � dsk (��� ��� ���������� �������������� �� 2 ����) |
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| 135 | // ������� � ������� �������, � ����� � ��������� �������� (������� ���������� �������� �������� �� ����� ��������) |
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| 136 | /* |
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| 137 | // ����� ������ ������ � ������� �� opera soft (�������� mot) |
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| 138 | // ��������� ������ ����� (corsarios + mutant zone) |
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| 139 | if(IsExtended && c == 40 && SecInfo.n == 8 && SecInfoDataLen == 0) |
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| 140 | { |
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| 141 | const auto &SecInfo{ TrackInfo->SecInfoList[s-1] }; |
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| 142 | auto SecInfoDataLen{ SecInfo.DataLen }; |
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| 143 | t.hdr[s].data = PrevSecData - 0x512; |
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| 144 | t.hdr[s].datlen = IsExtended ? SecInfoDataLen : 128U << SecInfo.n; |
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| 145 | } |
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| 146 | */ |
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| 147 | if((SecInfo.St1 & TUpd765::ST1_DE)) // crc error in address or data |
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| 148 | { |
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| 149 | if((SecInfo.St2 & TUpd765::ST2_DD)) // crc error in data |
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| 150 | { |
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| 151 | t.hdr[s].c2 = 2; |
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| 152 | if(IsOverlappedSec) |
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| 153 | { |
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| 154 | t.hdr[s].data = nullptr; |
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| 155 | } |
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| 156 | } |
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| 157 | else |
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| 158 | { |
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| 159 | t.hdr[s].c1 = 2; // crc error in address |
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| 160 | // t.hdr[s].data = nullptr; |
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| 161 | } |
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| 162 | } |
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| 163 | |||
| 164 | if(SecInfo.St2 & TUpd765::ST2_CM) |
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| 165 | { |
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| 166 | t.hdr[s].Flags = SECHDR::FL_DDAM; |
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| 167 | } |
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| 168 | else |
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| 169 | { |
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| 170 | t.hdr[s].Flags = 0; |
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| 171 | } |
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| 172 | PrevSecData = SecData; |
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| 173 | SecData += IsExtended ? SecInfoDataLen : 128U << SecInfo.n; |
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| 174 | } |
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| 175 | t.s = TrackInfo->NumSec; |
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| 176 | t.format(); |
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| 177 | Offset += TrkSize; |
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| 178 | } |
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| 179 | } |
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| 180 | return 1; |
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| 181 | } |