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fixup crcs and mfm clock bit update (nw)

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This commit is contained in:
Olivier Galibert 2015-04-15 11:41:10 +02:00
parent 032d447429
commit 1c297adf33
1 changed files with 21 additions and 7 deletions
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28
src/lib/formats/flopimg.c
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@ -1058,7 +1058,8 @@ bool floppy_image_format_t::extension_matches(const char *file_name) const
bool floppy_image_format_t::type_no_data(int type) const
{
return type == CRC_CCITT_START ||
return
type == CRC_CCITT_START ||
type == CRC_CCITT_FM_START ||
type == CRC_AMIGA_START ||
type == CRC_CBM_START ||
@ -1074,11 +1075,24 @@ bool floppy_image_format_t::type_no_data(int type) const
bool floppy_image_format_t::type_data_mfm(int type, int p1, const gen_crc_info *crcs) const
{
return !type_no_data(type) &&
type != RAW &&
type != RAWBITS &&
type != FM &&
(type != CRC || (crcs[p1].type != CRC_CCITT && crcs[p1].type != CRC_CCITT_FM && crcs[p1].type != CRC_AMIGA));
return
type == MFM ||
type == MFMBITS ||
type == TRACK_ID ||
type == HEAD_ID ||
type == HEAD_ID_SWAP ||
type == SECTOR_ID ||
type == SIZE_ID ||
type == OFFSET_ID_O ||
type == OFFSET_ID_E ||
type == SECTOR_ID_O ||
type == SECTOR_ID_E ||
type == REMAIN_O ||
type == REMAIN_E ||
type == SECTOR_DATA ||
type == SECTOR_DATA_O ||
type == SECTOR_DATA_E ||
(type == CRC && (crcs[p1].type == CRC_CCITT || crcs[p1].type == CRC_AMIGA));
}
void floppy_image_format_t::collect_crcs(const desc_e *desc, gen_crc_info *crcs)
@ -1341,7 +1355,7 @@ void floppy_image_format_t::fixup_crcs(std::vector<UINT32> &buffer, gen_crc_info
}
if(crcs[i].fixup_mfm_clock) {
int offset = crcs[i].write + crc_cells_size(crcs[i].type);
bit_w(buffer, offset, !((offset ? bit_r(buffer, offset-1) : false) || bit_r(buffer, offset+1)));
bit_w(buffer, !((offset ? bit_r(buffer, offset-1) : false) || bit_r(buffer, offset+1)), 1000, offset);
}
crcs[i].write = -1;
}